improve balls

packages/common/src/constants.ts

@@ -405,8 +405,9 @@ export const ROUGHNESS = {
 
 export const STROKE_WIDTH = {
   thin: 1,
-  bold: 2,
+  medium: 2,
-  extraBold: 4,
+  bold: 4,
+  extraBold: 8,
 } as const;
 
 export const DEFAULT_ELEMENT_PROPS: {
@@ -429,6 +430,8 @@ export const DEFAULT_ELEMENT_PROPS: {
   locked: false,
 };
 
+export const DEFAULT_FREE_DRAW_STROKE_SHAPE = "variable" as const;
+
 export const LIBRARY_SIDEBAR_TAB = "library";
 export const CANVAS_SEARCH_TAB = "search";
 

packages/element/src/bounds.ts

@@ -168,12 +168,14 @@ export class ElementBounds {
           ),
         ),
       );
+      const padding =
+        element.strokeShape === "fixed" ? element.strokeWidth / 2 : 0;
 
       return [
-        minX + element.x,
+        minX + element.x - padding,
-        minY + element.y,
+        minY + element.y - padding,
-        maxX + element.x,
+        maxX + element.x + padding,
-        maxY + element.y,
+        maxY + element.y + padding,
       ];
     } else if (isLinearElement(element)) {
       bounds = getLinearElementRotatedBounds(element, cx, cy, elementsMap);
@@ -703,10 +705,11 @@ const getFreeDrawElementAbsoluteCoords = (
   element: ExcalidrawFreeDrawElement,
 ): [number, number, number, number, number, number] => {
   const [minX, minY, maxX, maxY] = getBoundsFromPoints(element.points);
-  const x1 = minX + element.x;
+  const padding = element.strokeShape === "fixed" ? element.strokeWidth / 2 : 0;
-  const y1 = minY + element.y;
+  const x1 = minX + element.x - padding;
-  const x2 = maxX + element.x;
+  const y1 = minY + element.y - padding;
-  const y2 = maxY + element.y;
+  const x2 = maxX + element.x + padding;
+  const y2 = maxY + element.y + padding;
   return [x1, y1, x2, y2, (x1 + x2) / 2, (y1 + y2) / 2];
 };
 

packages/element/src/collision.ts

@@ -27,6 +27,7 @@ import type {
 
 import type { FrameNameBounds } from "@excalidraw/excalidraw/types";
 
+import { isLoopFreeDrawElement } from "./freedraw";
 import { isPathALoop } from "./utils";
 import {
   doBoundsIntersect,
@@ -93,7 +94,7 @@ export const shouldTestInside = (element: ExcalidrawElement) => {
   }
 
   if (element.type === "freedraw") {
-    return isDraggableFromInside && isPathALoop(element.points);
+    return isDraggableFromInside && isLoopFreeDrawElement(element);
   }
 
   return isDraggableFromInside || isImageElement(element);
@@ -754,8 +755,8 @@ export const isPointInElement = (
   elementsMap: ElementsMap,
 ) => {
   if (
-    (isLinearElement(element) || isFreeDrawElement(element)) &&
+    (isLinearElement(element) && !isPathALoop(element.points)) ||
-    !isPathALoop(element.points)
+    (isFreeDrawElement(element) && !isLoopFreeDrawElement(element))
   ) {
     // There isn't any "inside" for a non-looping path
     return false;

packages/element/src/freedraw.ts

@@ -0,0 +1,181 @@
+import {
+  pointDistance,
+  vectorCross,
+  vectorDot,
+  vectorFromPoint,
+} from "@excalidraw/math";
+
+import type { LocalPoint } from "@excalidraw/math";
+
+import { isPathALoop } from "./utils";
+
+import type { ExcalidrawFreeDrawElement } from "./types";
+
+type ZoomValue = NonNullable<Parameters<typeof isPathALoop>[1]>;
+
+type FixedFreeDrawSimplificationProfile = {
+  minPointDistancePx: number;
+  maxPointDistance: number;
+  strokeDistanceFactor: number;
+  collinearityFactor: number;
+  minAlignment: number;
+  zoomScaling: "sqrt" | "none";
+};
+
+const FIXED_FREEDRAW_CAPTURE_PROFILE: FixedFreeDrawSimplificationProfile = {
+  minPointDistancePx: 0.35,
+  maxPointDistance: 0.85,
+  strokeDistanceFactor: 0.08,
+  collinearityFactor: 0.3,
+  minAlignment: 0.985,
+  zoomScaling: "sqrt",
+};
+
+const hasSyntheticLoopClosure = (
+  points: readonly LocalPoint[],
+): points is readonly [LocalPoint, LocalPoint, ...LocalPoint[]] => {
+  if (points.length < 3) {
+    return false;
+  }
+
+  const firstPoint = points[0];
+  const lastPoint = points[points.length - 1];
+
+  return firstPoint[0] === lastPoint[0] && firstPoint[1] === lastPoint[1];
+};
+
+const stripSyntheticLoopClosure = (points: readonly LocalPoint[]) =>
+  hasSyntheticLoopClosure(points) ? points.slice(0, -1) : points;
+
+export const isLoopFreeDrawElement = (
+  element: ExcalidrawFreeDrawElement,
+  zoomValue: ZoomValue = 1 as ZoomValue,
+) => element.strokeShape !== "fixed" && isPathALoop(element.points, zoomValue);
+
+export const getFixedFreeDrawPoints = (
+  element: ExcalidrawFreeDrawElement,
+): readonly LocalPoint[] => stripSyntheticLoopClosure(element.points);
+
+export const getFixedFreeDrawPointSamplingDistance = (
+  strokeWidth: number,
+  zoomValue: ZoomValue = 1 as ZoomValue,
+  profile: FixedFreeDrawSimplificationProfile = FIXED_FREEDRAW_CAPTURE_PROFILE,
+) =>
+  Math.min(
+    Math.max(
+      profile.minPointDistancePx /
+        (profile.zoomScaling === "sqrt"
+          ? Math.max(1, Math.sqrt(zoomValue))
+          : 1),
+      strokeWidth * profile.strokeDistanceFactor,
+    ),
+    profile.maxPointDistance,
+  );
+
+const isRedundantFixedFreeDrawPoint = (
+  previousPoint: LocalPoint,
+  currentPoint: LocalPoint,
+  nextPoint: LocalPoint,
+  strokeWidth: number,
+  zoomValue: ZoomValue,
+  profile: FixedFreeDrawSimplificationProfile,
+) => {
+  const previousSegmentLength = pointDistance(previousPoint, currentPoint);
+  const nextSegmentLength = pointDistance(currentPoint, nextPoint);
+
+  if (!previousSegmentLength || !nextSegmentLength) {
+    return true;
+  }
+
+  const previousVector = vectorFromPoint(currentPoint, previousPoint);
+  const nextVector = vectorFromPoint(nextPoint, currentPoint);
+  const alignment =
+    vectorDot(previousVector, nextVector) /
+    (previousSegmentLength * nextSegmentLength);
+
+  if (alignment < profile.minAlignment) {
+    return false;
+  }
+
+  const chord = vectorFromPoint(nextPoint, previousPoint);
+  const chordLength = pointDistance(previousPoint, nextPoint);
+
+  if (!chordLength) {
+    return true;
+  }
+
+  const distanceToChord =
+    Math.abs(vectorCross(vectorFromPoint(currentPoint, previousPoint), chord)) /
+    chordLength;
+
+  return (
+    distanceToChord <=
+    getFixedFreeDrawPointSamplingDistance(strokeWidth, zoomValue, profile) *
+      profile.collinearityFactor
+  );
+};
+
+export const getFixedFreeDrawPointAction = ({
+  points,
+  nextPoint,
+  strokeWidth,
+  zoomValue,
+  isFinalPoint = false,
+  profile,
+}: {
+  points: readonly LocalPoint[];
+  nextPoint: LocalPoint;
+  strokeWidth: number;
+  zoomValue: ZoomValue;
+  isFinalPoint?: boolean;
+  profile?: FixedFreeDrawSimplificationProfile;
+}) => {
+  const simplificationProfile = profile ?? FIXED_FREEDRAW_CAPTURE_PROFILE;
+  const lastPoint = points[points.length - 1];
+
+  if (!lastPoint) {
+    return "append" as const;
+  }
+
+  if (lastPoint[0] === nextPoint[0] && lastPoint[1] === nextPoint[1]) {
+    return "discard" as const;
+  }
+
+  const samplingDistance = getFixedFreeDrawPointSamplingDistance(
+    strokeWidth,
+    zoomValue,
+    simplificationProfile,
+  );
+
+  if (points.length === 1) {
+    return !isFinalPoint &&
+      pointDistance(lastPoint, nextPoint) < samplingDistance
+      ? ("discard" as const)
+      : ("append" as const);
+  }
+
+  const previousPoint = points[points.length - 2];
+
+  if (
+    isRedundantFixedFreeDrawPoint(
+      previousPoint,
+      lastPoint,
+      nextPoint,
+      strokeWidth,
+      zoomValue,
+      simplificationProfile,
+    )
+  ) {
+    return "replace" as const;
+  }
+
+  if (!isFinalPoint && pointDistance(lastPoint, nextPoint) < samplingDistance) {
+    return "discard" as const;
+  }
+
+  return "append" as const;
+};
+
+export const getRenderableFixedFreeDrawPoints = (
+  element: ExcalidrawFreeDrawElement,
+): readonly LocalPoint[] => getFixedFreeDrawPoints(element);

packages/element/src/index.ts

@@ -69,6 +69,7 @@ export * from "./duplicate";
 export * from "./elbowArrow";
 export * from "./elementLink";
 export * from "./embeddable";
+export * from "./freedraw";
 export * from "./flowchart";
 export * from "./arrows/focus";
 export * from "./fractionalIndex";

packages/element/src/mutateElement.ts

@@ -1,4 +1,5 @@
 import {
+  DEFAULT_FREE_DRAW_STROKE_SHAPE,
   getSizeFromPoints,
   randomInteger,
   getUpdatedTimestamp,
@@ -18,6 +19,8 @@ import type {
   ElementsMap,
   ExcalidrawElbowArrowElement,
   ExcalidrawElement,
+  ExcalidrawFreeDrawElement,
+  FreeDrawStrokeShape,
   NonDeletedSceneElementsMap,
 } from "./types";
 
@@ -177,6 +180,30 @@ export const newElementWith = <TElement extends ExcalidrawElement>(
   };
 };
 
+export const newFreeDrawElementWithStrokeShape = <
+  TElement extends ExcalidrawFreeDrawElement,
+>(
+  element: TElement,
+  strokeShape: FreeDrawStrokeShape,
+): TElement => {
+  if (strokeShape === DEFAULT_FREE_DRAW_STROKE_SHAPE) {
+    if (!("strokeShape" in element)) {
+      return element;
+    }
+    const nextElement = newElementWith(
+      element,
+      {} as ElementUpdate<TElement>,
+      true,
+    );
+    delete (nextElement as Mutable<Partial<TElement>>).strokeShape;
+    return nextElement;
+  }
+
+  return newElementWith(element, {
+    strokeShape,
+  } as ElementUpdate<TElement>);
+};
+
 /**
  * Mutates element, bumping `version`, `versionNonce`, and `updated`.
  *

packages/element/src/newElement.ts

@@ -445,6 +445,7 @@ export const newFreeDrawElement = (
     points?: ExcalidrawFreeDrawElement["points"];
     simulatePressure: boolean;
     pressures?: ExcalidrawFreeDrawElement["pressures"];
+    strokeShape?: ExcalidrawFreeDrawElement["strokeShape"];
   } & ElementConstructorOpts,
 ): NonDeleted<ExcalidrawFreeDrawElement> => {
   return {
@@ -452,6 +453,7 @@ export const newFreeDrawElement = (
     points: opts.points || [],
     pressures: opts.pressures || [],
     simulatePressure: opts.simulatePressure,
+    ...(opts.strokeShape === "fixed" ? { strokeShape: opts.strokeShape } : {}),
   };
 };
 

packages/element/src/renderElement.ts

@@ -417,16 +417,27 @@ const drawElementOnCanvas = (
     case "freedraw": {
       // Draw directly to canvas
       context.save();
+      context.lineJoin = "round";
+      context.lineCap = "round";
 
       const shapes = ShapeCache.generateElementShape(element, renderConfig);
+      const isFixedStroke = element.strokeShape === "fixed";
 
       for (const shape of shapes) {
         if (typeof shape === "string") {
-          context.fillStyle =
+          const strokeColor =
             renderConfig.theme === THEME.DARK
               ? applyDarkModeFilter(element.strokeColor)
               : element.strokeColor;
-          context.fill(new Path2D(shape));
+
+          if (isFixedStroke) {
+            context.strokeStyle = strokeColor;
+            context.lineWidth = element.strokeWidth;
+            context.stroke(new Path2D(shape));
+          } else {
+            context.fillStyle = strokeColor;
+            context.fill(new Path2D(shape));
+          }
         } else {
           rc.draw(shape);
         }

packages/element/src/shape.ts

@@ -1,4 +1,5 @@
 import { simplify } from "points-on-curve";
+import { DEFAULT_FREE_DRAW_STROKE_SHAPE } from "@excalidraw/common";
 import { getStroke } from "perfect-freehand";
 
 import {
@@ -13,6 +14,7 @@ import {
 import {
   pointFrom,
   pointDistance,
+  round,
   type LocalPoint,
   pointRotateRads,
 } from "@excalidraw/math";
@@ -52,6 +54,10 @@ import {
   isIframeLikeElement,
   isLinearElement,
 } from "./typeChecks";
+import {
+  getRenderableFixedFreeDrawPoints,
+  isLoopFreeDrawElement,
+} from "./freedraw";
 import { getCornerRadius, isPathALoop } from "./utils";
 import { headingForPointIsHorizontal } from "./heading";
 
@@ -244,7 +250,12 @@ export const generateRoughOptions = (
     }
     case "line":
     case "freedraw": {
-      if (isPathALoop(element.points)) {
+      const isLoop =
+        element.type === "freedraw"
+          ? isLoopFreeDrawElement(element)
+          : isPathALoop(element.points);
+
+      if (isLoop) {
         options.fillStyle = element.fillStyle;
         options.fill =
           element.backgroundColor === "transparent"
@@ -966,7 +977,7 @@ const _generateElementShape = (
       const shapes: ElementShapes[typeof element.type] = [];
 
       // (1) background fill (rc shape), optional
-      if (isPathALoop(element.points)) {
+      if (isLoopFreeDrawElement(element)) {
         // generate rough polygon to fill freedraw shape
         const simplifiedPoints = simplify(
           element.points as Mutable<LocalPoint[]>,
@@ -1173,6 +1184,13 @@ export const toggleLinePolygonState = (
 
 // NOTE not cached (-> for SVG export)
 const getFreeDrawSvgPath = (element: ExcalidrawFreeDrawElement) => {
+  if (element.strokeShape === "fixed") {
+    return getSvgPathFromFixedFreeDrawPoints(
+      getRenderableFixedFreeDrawPoints(element),
+      element.strokeWidth,
+    ) as SVGPathString;
+  }
+
   return getSvgPathFromStroke(
     getFreedrawOutlinePoints(element),
   ) as SVGPathString;
@@ -1181,34 +1199,243 @@ const getFreeDrawSvgPath = (element: ExcalidrawFreeDrawElement) => {
 export const getFreedrawOutlinePoints = (
   element: ExcalidrawFreeDrawElement,
 ) => {
+  const strokeShape = element.strokeShape ?? DEFAULT_FREE_DRAW_STROKE_SHAPE;
+  const isFixedStroke = strokeShape === "fixed";
   // If input points are empty (should they ever be?) return a dot
-  const inputPoints = element.simulatePressure
+  const inputPoints = isFixedStroke
+    ? element.points.length
+      ? element.points
+      : [[0, 0]]
+    : element.simulatePressure
     ? element.points
     : element.points.length
     ? element.points.map(([x, y], i) => [x, y, element.pressures[i]])
     : [[0, 0, 0.5]];
 
   return getStroke(inputPoints as number[][], {
-    simulatePressure: element.simulatePressure,
+    simulatePressure: isFixedStroke ? false : element.simulatePressure,
-    size: element.strokeWidth * 4.25,
+    size: isFixedStroke ? element.strokeWidth : element.strokeWidth * 4.25,
-    thinning: 0.6,
+    thinning: isFixedStroke ? 0 : 0.6,
     smoothing: 0.5,
     streamline: 0.5,
-    easing: (t) => Math.sin((t * Math.PI) / 2), // https://easings.net/#easeOutSine
+    easing: isFixedStroke ? (t) => t : (t) => Math.sin((t * Math.PI) / 2), // https://easings.net/#easeOutSine
     last: true,
   }) as [number, number][];
 };
 
-const med = (A: number[], B: number[]) => {
+const med = (A: readonly number[], B: readonly number[]) => {
   return [(A[0] + B[0]) / 2, (A[1] + B[1]) / 2];
 };
 
+const roundPoint = (point: readonly number[]) =>
+  `${round(point[0], 2)},${round(point[1], 2)} `;
+
+const averagePoint = (A: readonly number[], B: readonly number[]) =>
+  `${round((A[0] + B[0]) / 2, 2)},${round((A[1] + B[1]) / 2, 2)} `;
+
+const getReadonlyPointDistance = (
+  pointA: readonly number[],
+  pointB: readonly number[],
+) => Math.hypot(pointA[0] - pointB[0], pointA[1] - pointB[1]);
+
 // Trim SVG path data so number are each two decimal points. This
 // improves SVG exports, and prevents rendering errors on points
 // with long decimals.
 const TO_FIXED_PRECISION = /(\s?[A-Z]?,?-?[0-9]*\.[0-9]{0,2})(([0-9]|e|-)*)/g;
 
-const getSvgPathFromStroke = (points: number[][]): string => {
+const getSvgPathFromPoints = (
+  points: ReadonlyArray<readonly number[]>,
+  closed = false,
+): string => {
+  const len = points.length;
+
+  if (len < 2) {
+    return "";
+  }
+
+  const path = points
+    .slice(1)
+    .map((point) => `L${roundPoint(point)}`)
+    .join("");
+
+  return `M${roundPoint(points[0])}${path}${closed ? "Z" : ""}`;
+};
+
+const FIXED_FREEDRAW_MIN_SMOOTH_ALIGNMENT = 0.6;
+const FIXED_FREEDRAW_MIN_SMOOTH_SEGMENT_LENGTH = 0.2;
+const FIXED_FREEDRAW_MIN_CORNER_ALIGNMENT = -0.25;
+const FIXED_FREEDRAW_MIN_CORNER_ROUNDING = 0.75;
+const FIXED_FREEDRAW_MAX_CORNER_ROUNDING = 6;
+const FIXED_FREEDRAW_CORNER_ROUNDING_FACTOR = 0.35;
+const FIXED_FREEDRAW_CORNER_ROUNDING_WIDTH_FACTOR = 1.5;
+const FIXED_FREEDRAW_MIN_TERMINAL_STUB = 0.75;
+const FIXED_FREEDRAW_MAX_TERMINAL_STUB = 2.5;
+const FIXED_FREEDRAW_TERMINAL_STUB_WIDTH_FACTOR = 1.5;
+
+const shouldSmoothFixedFreeDrawPoint = (
+  previousPoint: readonly number[],
+  currentPoint: readonly number[],
+  nextPoint: readonly number[],
+) => {
+  const previousDeltaX = currentPoint[0] - previousPoint[0];
+  const previousDeltaY = currentPoint[1] - previousPoint[1];
+  const nextDeltaX = nextPoint[0] - currentPoint[0];
+  const nextDeltaY = nextPoint[1] - currentPoint[1];
+  const previousSegmentLength = Math.hypot(previousDeltaX, previousDeltaY);
+  const nextSegmentLength = Math.hypot(nextDeltaX, nextDeltaY);
+
+  if (
+    previousSegmentLength < FIXED_FREEDRAW_MIN_SMOOTH_SEGMENT_LENGTH ||
+    nextSegmentLength < FIXED_FREEDRAW_MIN_SMOOTH_SEGMENT_LENGTH
+  ) {
+    return false;
+  }
+
+  const alignment =
+    (previousDeltaX * nextDeltaX + previousDeltaY * nextDeltaY) /
+    (previousSegmentLength * nextSegmentLength);
+
+  return alignment >= FIXED_FREEDRAW_MIN_SMOOTH_ALIGNMENT;
+};
+
+const getFixedFreeDrawRoundedCorner = (
+  previousPoint: readonly number[],
+  currentPoint: readonly number[],
+  nextPoint: readonly number[],
+  strokeWidth: number,
+) => {
+  const previousDeltaX = currentPoint[0] - previousPoint[0];
+  const previousDeltaY = currentPoint[1] - previousPoint[1];
+  const nextDeltaX = nextPoint[0] - currentPoint[0];
+  const nextDeltaY = nextPoint[1] - currentPoint[1];
+  const previousSegmentLength = Math.hypot(previousDeltaX, previousDeltaY);
+  const nextSegmentLength = Math.hypot(nextDeltaX, nextDeltaY);
+
+  if (!previousSegmentLength || !nextSegmentLength) {
+    return null;
+  }
+
+  const alignment =
+    (previousDeltaX * nextDeltaX + previousDeltaY * nextDeltaY) /
+    (previousSegmentLength * nextSegmentLength);
+
+  if (
+    alignment >= FIXED_FREEDRAW_MIN_SMOOTH_ALIGNMENT ||
+    alignment <= FIXED_FREEDRAW_MIN_CORNER_ALIGNMENT
+  ) {
+    return null;
+  }
+
+  const cornerRounding = Math.min(
+    Math.max(
+      strokeWidth * FIXED_FREEDRAW_CORNER_ROUNDING_WIDTH_FACTOR,
+      FIXED_FREEDRAW_MIN_CORNER_ROUNDING,
+    ),
+    previousSegmentLength * FIXED_FREEDRAW_CORNER_ROUNDING_FACTOR,
+    nextSegmentLength * FIXED_FREEDRAW_CORNER_ROUNDING_FACTOR,
+    FIXED_FREEDRAW_MAX_CORNER_ROUNDING,
+  );
+
+  if (!cornerRounding) {
+    return null;
+  }
+
+  return {
+    entryPoint: [
+      currentPoint[0] - (previousDeltaX / previousSegmentLength) * cornerRounding,
+      currentPoint[1] - (previousDeltaY / previousSegmentLength) * cornerRounding,
+    ] as const,
+    exitPoint: [
+      currentPoint[0] + (nextDeltaX / nextSegmentLength) * cornerRounding,
+      currentPoint[1] + (nextDeltaY / nextSegmentLength) * cornerRounding,
+    ] as const,
+  };
+};
+
+const getFixedFreeDrawTerminalStubThreshold = (strokeWidth: number) =>
+  Math.min(
+    Math.max(
+      strokeWidth * FIXED_FREEDRAW_TERMINAL_STUB_WIDTH_FACTOR,
+      FIXED_FREEDRAW_MIN_TERMINAL_STUB,
+    ),
+    FIXED_FREEDRAW_MAX_TERMINAL_STUB,
+  );
+
+const getSvgPathFromFixedFreeDrawPoints = (
+  points: ReadonlyArray<readonly number[]>,
+  strokeWidth: number,
+): string => {
+  const len = points.length;
+
+  if (len < 2) {
+    return "";
+  }
+
+  if (len === 2) {
+    return `M${roundPoint(points[0])}L${roundPoint(points[1])}`;
+  }
+
+  let path = `M${roundPoint(points[0])}`;
+  const lastPoint = points[len - 1];
+  let endsAtLastPoint = false;
+
+  for (let index = 1; index < len - 1; index++) {
+    const previousPoint = points[index - 1];
+    const currentPoint = points[index];
+    const nextPoint = points[index + 1];
+    const isLastCurveSegment = index === len - 2;
+    const terminalStubThreshold = getFixedFreeDrawTerminalStubThreshold(
+      strokeWidth,
+    );
+    const shouldSmooth = shouldSmoothFixedFreeDrawPoint(
+      previousPoint,
+      currentPoint,
+      nextPoint,
+    );
+    const roundedCorner = shouldSmooth
+      ? null
+      : getFixedFreeDrawRoundedCorner(
+          previousPoint,
+          currentPoint,
+          nextPoint,
+          strokeWidth,
+        );
+    const shouldCollapseSmoothTerminalStub =
+      isLastCurveSegment &&
+      shouldSmooth &&
+      getReadonlyPointDistance(currentPoint, nextPoint) / 2 <=
+        terminalStubThreshold;
+    const shouldCollapseRoundedTerminalStub =
+      isLastCurveSegment &&
+      !!roundedCorner &&
+      getReadonlyPointDistance(roundedCorner.exitPoint, lastPoint) <=
+        terminalStubThreshold;
+
+    path += shouldSmooth
+      ? `Q${roundPoint(currentPoint)}${
+          shouldCollapseSmoothTerminalStub
+            ? roundPoint(lastPoint)
+            : averagePoint(currentPoint, nextPoint)
+        }`
+      : roundedCorner
+        ? `L${roundPoint(roundedCorner.entryPoint)}Q${roundPoint(
+            currentPoint,
+          )}${
+            shouldCollapseRoundedTerminalStub
+              ? roundPoint(lastPoint)
+              : roundPoint(roundedCorner.exitPoint)
+          }`
+        : `L${roundPoint(currentPoint)}`;
+    endsAtLastPoint =
+      shouldCollapseSmoothTerminalStub || shouldCollapseRoundedTerminalStub;
+  }
+
+  return endsAtLastPoint ? path : `${path}L${roundPoint(lastPoint)}`;
+};
+
+const getSvgPathFromStroke = (
+  points: ReadonlyArray<readonly number[]>,
+): string => {
   if (!points.length) {
     return "";
   }

packages/element/src/types.ts

@@ -26,6 +26,7 @@ export type PointerType = "mouse" | "pen" | "touch";
 export type StrokeRoundness = "round" | "sharp";
 export type RoundnessType = ValueOf<typeof ROUNDNESS>;
 export type StrokeStyle = "solid" | "dashed" | "dotted";
+export type FreeDrawStrokeShape = "variable" | "fixed";
 export type TextAlign = typeof TEXT_ALIGN[keyof typeof TEXT_ALIGN];
 
 type VerticalAlignKeys = keyof typeof VERTICAL_ALIGN;
@@ -390,6 +391,7 @@ export type ExcalidrawFreeDrawElement = _ExcalidrawElementBase &
     points: readonly LocalPoint[];
     pressures: readonly number[];
     simulatePressure: boolean;
+    strokeShape?: FreeDrawStrokeShape;
   }>;
 
 export type FileId = string & { _brand: "FileId" };

packages/element/tests/bounds.test.ts

@@ -6,7 +6,11 @@ import type { LocalPoint } from "@excalidraw/math";
 
 import { getElementAbsoluteCoords, getElementBounds } from "../src/bounds";
 
-import type { ExcalidrawElement, ExcalidrawLinearElement } from "../src/types";
+import type {
+  ExcalidrawElement,
+  ExcalidrawFreeDrawElement,
+  ExcalidrawLinearElement,
+} from "../src/types";
 
 const _ce = ({
   x,
@@ -117,6 +121,31 @@ describe("getElementBounds", () => {
     expect(y2).toEqual(42.90569415042095);
   });
 
+  it("fixed freedraw", () => {
+    const element = {
+      ..._ce({
+        x: 40,
+        y: 30,
+        w: 10,
+        h: 0,
+        a: 0,
+        t: "freedraw",
+      }),
+      strokeWidth: 8,
+      points: [pointFrom<LocalPoint>(0, 0), pointFrom<LocalPoint>(10, 0)],
+      pressures: [],
+      simulatePressure: true,
+      strokeShape: "fixed",
+    } as unknown as ExcalidrawFreeDrawElement;
+
+    const [x1, y1, x2, y2] = getElementBounds(element, arrayToMap([element]));
+
+    expect(x1).toEqual(36);
+    expect(y1).toEqual(26);
+    expect(x2).toEqual(54);
+    expect(y2).toEqual(34);
+  });
+
   it("curved line", () => {
     const element = {
       ..._ce({

packages/element/tests/shape.test.ts

@@ -0,0 +1,160 @@
+import { pointFrom } from "@excalidraw/math";
+import { API } from "@excalidraw/excalidraw/tests/helpers/api";
+import { vi } from "vitest";
+
+vi.mock("perfect-freehand", () => ({
+  getStroke: vi.fn(() => []),
+}));
+
+import { getStroke } from "perfect-freehand";
+
+import { getFreedrawOutlinePoints, ShapeCache } from "../src/shape";
+
+describe("freedraw stroke shape", () => {
+  beforeEach(() => {
+    vi.mocked(getStroke).mockClear();
+    ShapeCache.destroy();
+  });
+
+  it("renders fixed strokes from the centerline path", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      points: [pointFrom(0, 0), pointFrom(10, 10), pointFrom(20, 15)],
+    });
+
+    const shapes = ShapeCache.generateElementShape(element, null);
+
+    expect(shapes).toEqual([expect.any(String)]);
+    expect(shapes[0]).not.toContain("Z");
+    expect(vi.mocked(getStroke)).not.toHaveBeenCalled();
+  });
+
+  it("rounds fixed stroke corners without flattening them", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      strokeWidth: 1,
+      points: [pointFrom(0, 0), pointFrom(10, 0), pointFrom(10, 10)],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toBe("M0,0 L8.5,0 Q10,0 10,1.5 L10,10 ");
+  });
+
+  it("does not round fixed stroke hairpin turns", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      strokeWidth: 1,
+      points: [pointFrom(0, 0), pointFrom(10, 0), pointFrom(9, 1)],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toBe("M0,0 L10,0 L9,1 ");
+  });
+
+  it("curves directly to the endpoint for tiny final smooth segments", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      strokeWidth: 1,
+      points: [pointFrom(0, 0), pointFrom(0.5, 0.1), pointFrom(0.8, 0.3)],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toBe("M0,0 Q0.5,0.1 0.8,0.3 ");
+  });
+
+  it("curves directly to the endpoint for tiny final rounded corners", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      strokeWidth: 1,
+      points: [pointFrom(0, 0), pointFrom(10, 0), pointFrom(10, 1)],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toBe("M0,0 L9.65,0 Q10,0 10,1 ");
+  });
+
+  it("smooths dense fixed stroke points without dropping them", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      points: [
+        pointFrom(0, 0),
+        pointFrom(0.3, 0.1),
+        pointFrom(0.6, 0.35),
+        pointFrom(1, 0.9),
+      ],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toContain("Q0.3,0.1 ");
+    expect(path).toContain("Q0.6,0.35 ");
+  });
+
+  it("drops synthetic loop closure for fixed strokes", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      points: [pointFrom(0, 0), pointFrom(10, 0), pointFrom(0, 0)],
+    });
+
+    const [path] = ShapeCache.generateElementShape(element, null);
+
+    expect(path).toBe("M0,0 L10,0 ");
+  });
+
+  it("uses fixed perfect-freehand settings for fixed strokes", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      strokeShape: "fixed",
+      strokeWidth: 8,
+      points: [pointFrom(0, 0), pointFrom(10, 10), pointFrom(20, 15)],
+    });
+
+    getFreedrawOutlinePoints(element);
+
+    expect(vi.mocked(getStroke)).toHaveBeenCalledWith(
+      element.points,
+      expect.objectContaining({
+        simulatePressure: false,
+        size: element.strokeWidth,
+        thinning: 0,
+      }),
+    );
+  });
+
+  it("keeps pressure-aware perfect-freehand settings for variable strokes", () => {
+    const element = API.createElement({
+      type: "freedraw",
+      points: [pointFrom(0, 0), pointFrom(10, 10), pointFrom(20, 15)],
+    });
+
+    getFreedrawOutlinePoints({
+      ...element,
+      simulatePressure: false,
+      pressures: [0.2, 0.8, 0.4],
+    });
+
+    expect(vi.mocked(getStroke)).toHaveBeenCalledWith(
+      [
+        [0, 0, 0.2],
+        [10, 10, 0.8],
+        [20, 15, 0.4],
+      ],
+      expect.objectContaining({
+        simulatePressure: false,
+        size: element.strokeWidth * 4.25,
+        thinning: 0.6,
+      }),
+    );
+  });
+});

packages/excalidraw/actions/actionFinalize.tsx

@@ -2,6 +2,7 @@ import { pointFrom } from "@excalidraw/math";
 
 import { bindOrUnbindBindingElement } from "@excalidraw/element/binding";
 import {
+  isLoopFreeDrawElement,
   isValidPolygon,
   LinearElementEditor,
   newElementWith,
@@ -242,7 +243,11 @@ export const actionFinalize = register<FormData>({
         // If the multi point line closes the loop,
         // set the last point to first point.
         // This ensures that loop remains closed at different scales.
-        const isLoop = isPathALoop(element.points, appState.zoom.value);
+        const isLoop = isLineElement(element)
+          ? isPathALoop(element.points, appState.zoom.value)
+          : isFreeDrawElement(element)
+          ? isLoopFreeDrawElement(element, appState.zoom.value)
+          : false;
 
         if (isLoop && (isLineElement(element) || isFreeDrawElement(element))) {
           const linePoints = element.points;

packages/excalidraw/actions/actionProperties.test.tsx

@@ -1,4 +1,5 @@
 import { queryByTestId } from "@testing-library/react";
+import { pointFrom } from "@excalidraw/math";
 
 import {
   COLOR_PALETTE,
@@ -10,7 +11,7 @@ import {
 import { Excalidraw } from "../index";
 import { API } from "../tests/helpers/api";
 import { UI } from "../tests/helpers/ui";
-import { render } from "../tests/test-utils";
+import { act, render } from "../tests/test-utils";
 
 describe("element locking", () => {
   beforeEach(async () => {
@@ -80,6 +81,20 @@ describe("element locking", () => {
       const centerTextAlign = queryByTestId(document.body, `align-right`);
       expect(centerTextAlign).toBeChecked();
     });
+
+    it("should show the active freedraw stroke type", () => {
+      UI.clickTool("freedraw");
+
+      API.setAppState({
+        currentItemStrokeShape: "fixed",
+      });
+
+      const fixedStrokeShape = queryByTestId(
+        document.body,
+        "strokeShape-fixed",
+      );
+      expect(fixedStrokeShape).toBeChecked();
+    });
   });
 
   describe("properties when elements selected", () => {
@@ -144,6 +159,9 @@ describe("element locking", () => {
       expect(
         queryByTestId(document.body, `strokeWidth-thin`),
       ).not.toBeChecked();
+      expect(
+        queryByTestId(document.body, `strokeWidth-medium`),
+      ).not.toBeChecked();
       expect(
         queryByTestId(document.body, `strokeWidth-bold`),
       ).not.toBeChecked();
@@ -159,6 +177,7 @@ describe("element locking", () => {
       });
       const text = API.createElement({
         type: "text",
+        strokeWidth: STROKE_WIDTH.bold,
         fontFamily: FONT_FAMILY["Comic Shanns"],
       });
       API.setElements([rect, text]);
@@ -169,5 +188,35 @@ describe("element locking", () => {
         "active",
       );
     });
+
+    it("should highlight the fixed freedraw stroke type for selected elements", () => {
+      const freedraw = API.createElement({
+        type: "freedraw",
+        strokeShape: "fixed",
+        points: [pointFrom(0, 0), pointFrom(10, 10), pointFrom(20, 15)],
+      });
+      API.setElements([freedraw]);
+      API.setSelectedElements([freedraw]);
+
+      const fixedStrokeShape = queryByTestId(
+        document.body,
+        "strokeShape-fixed",
+      );
+      expect(fixedStrokeShape).toBeChecked();
+    });
+
+    it("should apply fixed freedraw stroke type to newly drawn strokes", () => {
+      UI.clickTool("freedraw");
+
+      act(() => {
+        queryByTestId(document.body, "strokeShape-fixed")?.click();
+      });
+
+      const freedraw = UI.createElement("freedraw", {
+        points: [pointFrom(0, 0), pointFrom(10, 10), pointFrom(20, 15)],
+      });
+
+      expect(freedraw.strokeShape).toBe("fixed");
+    });
   });
 });

packages/excalidraw/actions/actionProperties.tsx

@@ -3,6 +3,7 @@ import { pointFrom } from "@excalidraw/math";
 import { useEffect, useMemo, useRef, useState } from "react";
 
 import {
+  DEFAULT_FREE_DRAW_STROKE_SHAPE,
   DEFAULT_ELEMENT_BACKGROUND_COLOR_PALETTE,
   DEFAULT_ELEMENT_BACKGROUND_PICKS,
   DEFAULT_ELEMENT_STROKE_COLOR_PALETTE,
@@ -36,6 +37,7 @@ import {
 import { LinearElementEditor } from "@excalidraw/element";
 
 import { newElementWith } from "@excalidraw/element";
+import { newFreeDrawElementWithStrokeShape } from "@excalidraw/element";
 import { getArrowheadForPicker } from "@excalidraw/element";
 
 import {
@@ -47,6 +49,7 @@ import {
   isArrowElement,
   isBoundToContainer,
   isElbowArrow,
+  isFreeDrawElement,
   isLinearElement,
   isLineElement,
   isTextElement,
@@ -70,6 +73,7 @@ import type {
   ElementsMap,
   ExcalidrawBindableElement,
   ExcalidrawElement,
+  ExcalidrawFreeDrawElement,
   ExcalidrawLinearElement,
   ExcalidrawTextElement,
   FontFamilyValues,
@@ -105,8 +109,11 @@ import {
   SloppinessArtistIcon,
   SloppinessCartoonistIcon,
   StrokeWidthBaseIcon,
+  StrokeWidthMediumIcon,
   StrokeWidthBoldIcon,
   StrokeWidthExtraBoldIcon,
+  StrokeShapeFixedIcon,
+  StrokeShapeVariableIcon,
   FontSizeSmallIcon,
   FontSizeMediumIcon,
   FontSizeLargeIcon,
@@ -187,6 +194,29 @@ export const changeProperty = (
   });
 };
 
+const getFreeDrawStrokeShape = (item: {
+  strokeShape?: ExcalidrawFreeDrawElement["strokeShape"];
+  currentItemStrokeShape?: AppState["currentItemStrokeShape"];
+}) =>
+  item.strokeShape ??
+  item.currentItemStrokeShape ??
+  DEFAULT_FREE_DRAW_STROKE_SHAPE;
+
+const getAppStateWithCurrentItemStrokeShape = (
+  appState: AppState,
+  strokeShape: NonNullable<ExcalidrawFreeDrawElement["strokeShape"]>,
+) => {
+  // if (strokeShape === DEFAULT_FREE_DRAW_STROKE_SHAPE) {
+  //   const { currentItemStrokeShape, ...nextAppState } = appState;
+  //   return nextAppState;
+  // }
+
+  return {
+    ...appState,
+    currentItemStrokeShape: strokeShape,
+  };
+};
+
 export const getFormValue = function <T extends Primitive>(
   elements: readonly ExcalidrawElement[],
   app: AppClassProperties,
@@ -574,6 +604,12 @@ export const actionChangeStrokeWidth = register<
               icon: StrokeWidthBaseIcon,
               testId: "strokeWidth-thin",
             },
+            {
+              value: STROKE_WIDTH.medium,
+              text: t("labels.medium"),
+              icon: StrokeWidthMediumIcon,
+              testId: "strokeWidth-medium",
+            },
             {
               value: STROKE_WIDTH.bold,
               text: t("labels.bold"),
@@ -602,6 +638,60 @@ export const actionChangeStrokeWidth = register<
   ),
 });
 
+export const actionChangeStrokeShape = register<
+  NonNullable<ExcalidrawFreeDrawElement["strokeShape"]>
+>({
+  name: "changeStrokeShape",
+  label: "labels.strokeShape",
+  trackEvent: false,
+  perform: (elements, appState, value) => {
+    invariant(value, "actionChangeStrokeShape: value must be defined");
+    return {
+      elements: changeProperty(elements, appState, (el) =>
+        isFreeDrawElement(el)
+          ? newFreeDrawElementWithStrokeShape(el, value)
+          : el,
+      ),
+      appState: getAppStateWithCurrentItemStrokeShape(appState, value),
+      captureUpdate: CaptureUpdateAction.IMMEDIATELY,
+    };
+  },
+  PanelComponent: ({ elements, appState, updateData, app }) => (
+    <fieldset>
+      <legend>{t("labels.strokeShape")}</legend>
+      <div className="buttonList">
+        <RadioSelection
+          group="stroke-shape"
+          options={[
+            {
+              value: "variable",
+              text: t("labels.strokeShape_variable"),
+              icon: StrokeShapeVariableIcon,
+              testId: "strokeShape-variable",
+            },
+            {
+              value: "fixed",
+              text: t("labels.strokeShape_fixed"),
+              icon: StrokeShapeFixedIcon,
+              testId: "strokeShape-fixed",
+            },
+          ]}
+          value={getFormValue(
+            elements,
+            app,
+            (element) =>
+              getFreeDrawStrokeShape(element as ExcalidrawFreeDrawElement),
+            isFreeDrawElement,
+            (hasSelection) =>
+              hasSelection ? null : getFreeDrawStrokeShape(appState),
+          )}
+          onChange={(value) => updateData(value)}
+        />
+      </div>
+    </fieldset>
+  ),
+});
+
 export const actionChangeSloppiness = register<ExcalidrawElement["roughness"]>({
   name: "changeSloppiness",
   label: "labels.sloppiness",

packages/excalidraw/actions/actionStyles.ts

@@ -1,4 +1,5 @@
 import {
+  DEFAULT_FREE_DRAW_STROKE_SHAPE,
   DEFAULT_FONT_SIZE,
   DEFAULT_FONT_FAMILY,
   DEFAULT_TEXT_ALIGN,
@@ -10,6 +11,7 @@ import {
 import { newElementWith } from "@excalidraw/element";
 
 import {
+  isFreeDrawElement,
   hasBoundTextElement,
   canApplyRoundnessTypeToElement,
   getDefaultRoundnessTypeForElement,
@@ -18,6 +20,7 @@ import {
   isExcalidrawElement,
   isTextElement,
 } from "@excalidraw/element";
+import { newFreeDrawElementWithStrokeShape } from "@excalidraw/element";
 
 import {
   getBoundTextElement,
@@ -154,6 +157,17 @@ export const actionPasteStyles = register({
             });
           }
 
+          if (
+            isFreeDrawElement(newElement) &&
+            isFreeDrawElement(elementStylesToCopyFrom)
+          ) {
+            newElement = newFreeDrawElementWithStrokeShape(
+              newElement,
+              elementStylesToCopyFrom.strokeShape ??
+                DEFAULT_FREE_DRAW_STROKE_SHAPE,
+            );
+          }
+
           if (isFrameLikeElement(element)) {
             newElement = newElementWith(newElement, {
               roundness: null,

packages/excalidraw/appState.ts

@@ -172,6 +172,7 @@ const APP_STATE_STORAGE_CONF = (<
   currentItemStrokeColor: { browser: true, export: false, server: false },
   currentItemStrokeStyle: { browser: true, export: false, server: false },
   currentItemStrokeWidth: { browser: true, export: false, server: false },
+  currentItemStrokeShape: { browser: true, export: false, server: false },
   currentItemTextAlign: { browser: true, export: false, server: false },
   currentHoveredFontFamily: { browser: false, export: false, server: false },
   cursorButton: { browser: true, export: false, server: false },

packages/excalidraw/components/Actions.tsx

@@ -394,6 +394,11 @@ const CombinedShapeProperties = ({
                   hasStrokeWidth(element.type),
                 )) &&
                 renderAction("changeStrokeWidth")}
+              {(appState.activeTool.type === "freedraw" ||
+                targetElements.some(
+                  (element) => element.type === "freedraw",
+                )) &&
+                renderAction("changeStrokeShape")}
               {(hasStrokeStyle(appState.activeTool.type) ||
                 targetElements.some((element) =>
                   hasStrokeStyle(element.type),

packages/excalidraw/components/App.tsx

@@ -9,6 +9,7 @@ import {
   clamp,
   pointFrom,
   pointDistance,
+  round,
   vector,
   pointRotateRads,
   vectorFromPoint,
@@ -119,6 +120,7 @@ import {
   getElementAbsoluteCoords,
   bindOrUnbindBindingElements,
   fixBindingsAfterDeletion,
+  getFixedFreeDrawPointAction,
   getHoveredElementForBinding,
   isBindingEnabled,
   updateBoundElements,
@@ -615,6 +617,19 @@ const gesture: Gesture = {
   initialScale: null,
 };
 
+const FREEDRAW_POINT_DECIMALS = 2;
+const FREEDRAW_PRESSURE_DECIMALS = 3;
+const FREEDRAW_DOT_EPSILON = 1 / 10 ** FREEDRAW_POINT_DECIMALS;
+
+const roundFreeDrawCoordinate = (value: number) =>
+  round(value, FREEDRAW_POINT_DECIMALS);
+
+const roundFreeDrawPressure = (value: number) =>
+  round(value, FREEDRAW_PRESSURE_DECIMALS);
+
+const getRoundedFreeDrawPoint = (x: number, y: number) =>
+  pointFrom<LocalPoint>(roundFreeDrawCoordinate(x), roundFreeDrawCoordinate(y));
+
 class App extends React.Component<AppProps, AppState> {
   canvas: AppClassProperties["canvas"];
   interactiveCanvas: AppClassProperties["interactiveCanvas"] = null;
@@ -8080,7 +8095,7 @@ class App extends React.Component<AppProps, AppState> {
 
     setCursor(this.interactiveCanvas, CURSOR_TYPE.GRABBING);
     let { clientX: lastX, clientY: lastY } = event;
-    const onPointerMove = withBatchedUpdatesThrottled((event: PointerEvent) => {
+    const onPointerMove = ((event: PointerEvent) => {
       const deltaX = lastX - event.clientX;
       const deltaY = lastY - event.clientY;
       lastX = event.clientX;
@@ -8146,7 +8161,7 @@ class App extends React.Component<AppProps, AppState> {
         window.removeEventListener(EVENT.POINTER_MOVE, onPointerMove);
         window.removeEventListener(EVENT.POINTER_UP, teardown);
         window.removeEventListener(EVENT.BLUR, teardown);
-        onPointerMove.flush();
+        // onPointerMove.flush();
       }),
     );
     window.addEventListener(EVENT.BLUR, teardown);
@@ -8256,14 +8271,14 @@ class App extends React.Component<AppProps, AppState> {
     isDraggingScrollBar = true;
     pointerDownState.lastCoords.x = event.clientX;
     pointerDownState.lastCoords.y = event.clientY;
-    const onPointerMove = withBatchedUpdatesThrottled((event: PointerEvent) => {
+    const onPointerMove = (event: PointerEvent) => {
       const target = event.target;
       if (!(target instanceof HTMLElement)) {
         return;
       }
 
       this.handlePointerMoveOverScrollbars(event, pointerDownState);
-    });
+    };
     const onPointerUp = withBatchedUpdates(() => {
       lastPointerUp = null;
       isDraggingScrollBar = false;
@@ -8274,7 +8289,7 @@ class App extends React.Component<AppProps, AppState> {
       this.savePointer(event.clientX, event.clientY, "up");
       window.removeEventListener(EVENT.POINTER_MOVE, onPointerMove);
       window.removeEventListener(EVENT.POINTER_UP, onPointerUp);
-      onPointerMove.flush();
+      // onPointerMove.flush();
     });
 
     lastPointerUp = onPointerUp;
@@ -8833,10 +8848,13 @@ class App extends React.Component<AppProps, AppState> {
       opacity: this.state.currentItemOpacity,
       roundness: null,
       simulatePressure,
+      strokeShape: this.state.currentItemStrokeShape,
       locked: false,
       frameId: topLayerFrame ? topLayerFrame.id : null,
       points: [pointFrom<LocalPoint>(0, 0)],
-      pressures: simulatePressure ? [] : [event.pressure],
+      pressures: simulatePressure
+        ? []
+        : [roundFreeDrawPressure(event.pressure)],
     });
 
     this.scene.insertElement(element);
@@ -9478,7 +9496,7 @@ class App extends React.Component<AppProps, AppState> {
   private onPointerMoveFromPointerDownHandler(
     pointerDownState: PointerDownState,
   ) {
-    return withBatchedUpdatesThrottled((event: PointerEvent) => {
+    return (event: PointerEvent) => {
       if (this.state.openDialog?.name === "elementLinkSelector") {
         return;
       }
@@ -10174,20 +10192,36 @@ class App extends React.Component<AppProps, AppState> {
           const points = newElement.points;
           const dx = pointerCoords.x - newElement.x;
           const dy = pointerCoords.y - newElement.y;
+          const nextPoint = getRoundedFreeDrawPoint(dx, dy);
+          const pressure = roundFreeDrawPressure(event.pressure);
+          const pointAction =
+            newElement.strokeShape === "fixed"
+              ? getFixedFreeDrawPointAction({
+                  points,
+                  nextPoint,
+                  strokeWidth: newElement.strokeWidth,
+                  zoomValue: this.state.zoom.value,
+                })
+              : points.length > 0 &&
+                points[points.length - 1][0] === nextPoint[0] &&
+                points[points.length - 1][1] === nextPoint[1]
+              ? "discard"
+              : "append";
 
-          const lastPoint = points.length > 0 && points[points.length - 1];
+          if (pointAction !== "discard") {
-          const discardPoint =
-            lastPoint && lastPoint[0] === dx && lastPoint[1] === dy;
-
-          if (!discardPoint) {
             const pressures = newElement.simulatePressure
               ? newElement.pressures
-              : [...newElement.pressures, event.pressure];
+              : pointAction === "replace"
+              ? [...newElement.pressures.slice(0, -1), pressure]
+              : [...newElement.pressures, pressure];
 
             this.scene.mutateElement(
               newElement,
               {
-                points: [...points, pointFrom<LocalPoint>(dx, dy)],
+                points:
+                  pointAction === "replace"
+                    ? [...points.slice(0, -1), nextPoint]
+                    : [...points, nextPoint],
                 pressures,
               },
               {
@@ -10345,7 +10379,7 @@ class App extends React.Component<AppProps, AppState> {
           });
         }
       }
-    });
+    };
   }
 
   // Returns whether the pointer move happened over either scrollbar
@@ -10390,7 +10424,7 @@ class App extends React.Component<AppProps, AppState> {
       this.removePointer(childEvent);
       pointerDownState.drag.blockDragging = false;
       if (pointerDownState.eventListeners.onMove) {
-        pointerDownState.eventListeners.onMove.flush();
+        // pointerDownState.eventListeners.onMove.flush();
       }
       const {
         newElement,
@@ -10627,23 +10661,48 @@ class App extends React.Component<AppProps, AppState> {
         );
 
         const points = newElement.points;
-        let dx = pointerCoords.x - newElement.x;
+        const dx = pointerCoords.x - newElement.x;
-        let dy = pointerCoords.y - newElement.y;
+        const dy = pointerCoords.y - newElement.y;
+        let nextPoint = getRoundedFreeDrawPoint(dx, dy);
 
         // Allows dots to avoid being flagged as infinitely small
-        if (dx === points[0][0] && dy === points[0][1]) {
+        if (nextPoint[0] === points[0][0] && nextPoint[1] === points[0][1]) {
-          dy += 0.0001;
+          nextPoint = getRoundedFreeDrawPoint(
-          dx += 0.0001;
+            dx + FREEDRAW_DOT_EPSILON,
+            dy + FREEDRAW_DOT_EPSILON,
+          );
         }
 
-        const pressures = newElement.simulatePressure
+        const lastPoint = points[points.length - 1];
-          ? []
+        const pressure = roundFreeDrawPressure(childEvent.pressure);
-          : [...newElement.pressures, childEvent.pressure];
+        const pointAction =
+          newElement.strokeShape === "fixed"
+            ? getFixedFreeDrawPointAction({
+                points,
+                nextPoint,
+                strokeWidth: newElement.strokeWidth,
+                zoomValue: this.state.zoom.value,
+                isFinalPoint: true,
+              })
+            : !lastPoint ||
+              lastPoint[0] !== nextPoint[0] ||
+              lastPoint[1] !== nextPoint[1]
+            ? "append"
+            : "discard";
 
-        this.scene.mutateElement(newElement, {
+        if (pointAction !== "discard") {
-          points: [...points, pointFrom<LocalPoint>(dx, dy)],
+          this.scene.mutateElement(newElement, {
-          pressures,
+            points:
-        });
+              pointAction === "replace"
+                ? [...points.slice(0, -1), nextPoint]
+                : [...points, nextPoint],
+            pressures: newElement.simulatePressure
+              ? []
+              : pointAction === "replace"
+              ? [...newElement.pressures.slice(0, -1), pressure]
+              : [...newElement.pressures, pressure],
+          });
+        }
 
         this.actionManager.executeAction(actionFinalize);
 

packages/excalidraw/components/icons.tsx

@@ -1164,7 +1164,7 @@ export const StrokeWidthBaseIcon = createIcon(
   modifiedTablerIconProps,
 );
 
-export const StrokeWidthBoldIcon = createIcon(
+export const StrokeWidthMediumIcon = createIcon(
   <path
     d="M5 10h10"
     stroke="currentColor"
@@ -1175,7 +1175,7 @@ export const StrokeWidthBoldIcon = createIcon(
   modifiedTablerIconProps,
 );
 
-export const StrokeWidthExtraBoldIcon = createIcon(
+export const StrokeWidthBoldIcon = createIcon(
   <path
     d="M5 10h10"
     stroke="currentColor"
@@ -1186,6 +1186,48 @@ export const StrokeWidthExtraBoldIcon = createIcon(
   modifiedTablerIconProps,
 );
 
+export const StrokeWidthExtraBoldIcon = createIcon(
+  <path
+    d="M5 10h10"
+    stroke="currentColor"
+    strokeWidth="5"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  />,
+  modifiedTablerIconProps,
+);
+
+export const StrokeShapeVariableIcon = createIcon(
+  <>
+    <path
+      d="M3.5 12.5c1.8-3.5 4.1-5.2 6.8-5.2 2.4 0 4.4 1.3 6.2 3.9"
+      stroke="currentColor"
+      strokeWidth="1.25"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+    />
+    <path
+      d="M7.75 10.8c1-.9 2-1.35 3.05-1.35 1.2 0 2.4.57 3.7 1.72"
+      stroke="currentColor"
+      strokeWidth="2.5"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+    />
+  </>,
+  modifiedTablerIconProps,
+);
+
+export const StrokeShapeFixedIcon = createIcon(
+  <path
+    d="M3.5 12h13"
+    stroke="currentColor"
+    strokeWidth="2.5"
+    strokeLinecap="round"
+    strokeLinejoin="round"
+  />,
+  modifiedTablerIconProps,
+);
+
 export const StrokeStyleSolidIcon = React.memo(({ theme }: { theme: Theme }) =>
   createIcon(
     <path

packages/excalidraw/data/restore.ts

@@ -96,6 +96,13 @@ type RestoredAppState = Omit<
   "offsetTop" | "offsetLeft" | "width" | "height"
 >;
 
+const normalizeFreeDrawStrokeShape = (
+  strokeShape: unknown,
+): AppState["currentItemStrokeShape"] =>
+  strokeShape === "fixed" || strokeShape === "stable"
+    ? "fixed"
+    : undefined;
+
 export const AllowedExcalidrawActiveTools: Record<
   AppState["activeTool"]["type"],
   boolean
@@ -412,10 +419,12 @@ export const restoreElement = (
 
       return element;
     case "freedraw": {
+      const strokeShape = normalizeFreeDrawStrokeShape(element.strokeShape);
       return restoreElementWithProperties(element, {
         points: element.points,
         simulatePressure: element.simulatePressure,
         pressures: element.pressures,
+        ...(strokeShape ? { strokeShape } : {}),
       });
     }
     case "image":
@@ -944,6 +953,16 @@ export const restoreAppState = (
 
   return {
     ...nextAppState,
+    ...(normalizeFreeDrawStrokeShape(
+      appState.currentItemStrokeShape ?? localAppState?.currentItemStrokeShape,
+    )
+      ? {
+          currentItemStrokeShape: normalizeFreeDrawStrokeShape(
+            appState.currentItemStrokeShape ??
+              localAppState?.currentItemStrokeShape,
+          ),
+        }
+      : {}),
     cursorButton: localAppState?.cursorButton || "up",
     // reset on fresh restore so as to hide the UI button if penMode not active
     penDetected:

packages/excalidraw/locales/en.json

@@ -30,6 +30,9 @@
     "changeBackground": "Change background color",
     "fill": "Fill",
     "strokeWidth": "Stroke width",
+    "strokeShape": "Stroke type",
+    "strokeShape_variable": "Variable",
+    "strokeShape_fixed": "Fixed",
     "strokeStyle": "Stroke style",
     "strokeStyle_solid": "Solid",
     "strokeStyle_dashed": "Dashed",

packages/excalidraw/reactUtils.ts

@@ -11,10 +11,10 @@ export const withBatchedUpdates = <
   TFunction extends ((event: any) => void) | (() => void),
 >(
   func: Parameters<TFunction>["length"] extends 0 | 1 ? TFunction : never,
-) =>
+) => func;
-  ((event) => {
+// ((event) => {
-    unstable_batchedUpdates(func as TFunction, event);
+//   unstable_batchedUpdates(func as TFunction, event);
-  }) as TFunction;
+// }) as TFunction;
 
 /**
  * barches React state updates and throttles the calls to a single call per

packages/excalidraw/renderer/staticSvgScene.ts

@@ -376,6 +376,11 @@ const renderElementToSvg = (
     }
     case "freedraw": {
       const wrapper = svgRoot.ownerDocument.createElementNS(SVG_NS, "g");
+      const isFixedStroke = element.strokeShape === "fixed";
+      const strokeColor =
+        renderConfig.theme === THEME.DARK
+          ? applyDarkModeFilter(element.strokeColor)
+          : element.strokeColor;
 
       const shapes = ShapeCache.generateElementShape(element, renderConfig);
       // always ordered as [background, stroke]
@@ -384,12 +389,15 @@ const renderElementToSvg = (
           // stroke (SVGPathString)
 
           const path = svgRoot.ownerDocument.createElementNS(SVG_NS, "path");
-          path.setAttribute(
+          if (isFixedStroke) {
-            "fill",
+            path.setAttribute("fill", "none");
-            renderConfig.theme === THEME.DARK
+            path.setAttribute("stroke", strokeColor);
-              ? applyDarkModeFilter(element.strokeColor)
+            path.setAttribute("stroke-width", `${element.strokeWidth}`);
-              : element.strokeColor,
+            path.setAttribute("stroke-linecap", "round");
-          );
+            path.setAttribute("stroke-linejoin", "round");
+          } else {
+            path.setAttribute("fill", strokeColor);
+          }
           path.setAttribute("d", shape);
           wrapper.appendChild(path);
         } else {

packages/excalidraw/tests/data/restore.test.ts

@@ -160,6 +160,40 @@ describe("restoreElements", () => {
     });
   });
 
+  it("should restore fixed freedraw element correctly", () => {
+    const freedrawElement = API.createElement({
+      type: "freedraw",
+      id: "id-freedraw02",
+      strokeShape: "fixed",
+      points: [pointFrom(0, 0), pointFrom(10, 10)],
+    });
+
+    const restoredFreedraw = restore.restoreElements(
+      [freedrawElement],
+      null,
+    )[0] as ExcalidrawFreeDrawElement;
+
+    expect(restoredFreedraw.strokeShape).toBe("fixed");
+  });
+
+  it("should restore legacy stable freedraw element as fixed", () => {
+    const restoredFreedraw = restore.restoreElements(
+      [
+        {
+          ...API.createElement({
+            type: "freedraw",
+            id: "id-freedraw03",
+            points: [pointFrom(0, 0), pointFrom(10, 10)],
+          }),
+          strokeShape: "stable",
+        } as any,
+      ],
+      null,
+    )[0] as ExcalidrawFreeDrawElement;
+
+    expect(restoredFreedraw.strokeShape).toBe("fixed");
+  });
+
   it("should restore line and draw elements correctly", () => {
     const lineElement = API.createElement({ type: "line", id: "id-line01" });
 
@@ -641,6 +675,26 @@ describe("restoreAppState", () => {
     expect(restoredAppState.name).toBe(stubImportedAppState.name);
   });
 
+  it("should restore fixed freedraw stroke type from app state", () => {
+    const restoredAppState = restore.restoreAppState(
+      { currentItemStrokeShape: "fixed" } as ImportedDataState["appState"],
+      null,
+    );
+
+    expect(restoredAppState.currentItemStrokeShape).toBe("fixed");
+  });
+
+  it("should restore legacy stable freedraw stroke type from app state as fixed", () => {
+    const restoredAppState = restore.restoreAppState(
+      {
+        currentItemStrokeShape: "stable",
+      } as unknown as ImportedDataState["appState"],
+      null,
+    );
+
+    expect(restoredAppState.currentItemStrokeShape).toBe("fixed");
+  });
+
   it("should return local app state when imported data state is null", () => {
     const stubLocalAppState = getDefaultAppState();
     stubLocalAppState.cursorButton = "down";

packages/excalidraw/tests/freedraw.test.tsx

@@ -0,0 +1,78 @@
+import React from "react";
+
+import { Excalidraw } from "../index";
+import { API } from "./helpers/api";
+import { Pointer, UI } from "./helpers/ui";
+import { render } from "./test-utils";
+
+describe("freedraw", () => {
+  beforeEach(async () => {
+    await render(<Excalidraw />);
+  });
+
+  it("rounds stored points and drops duplicates after rounding", () => {
+    const mouse = new Pointer("mouse");
+
+    UI.clickTool("freedraw");
+    mouse.downAt(10, 20);
+    mouse.moveTo(10.1234, 20.5678);
+    mouse.moveTo(10.1249, 20.5681);
+    mouse.upAt(20.9999, 30.0001);
+
+    const freedraw = window.h.elements.at(-1);
+
+    expect(freedraw).toEqual(expect.objectContaining({ type: "freedraw" }));
+    expect((freedraw as any).points).toEqual([
+      [0, 0],
+      [0.12, 0.57],
+      [11, 10],
+    ]);
+  });
+
+  it("does not snap fixed strokes closed when ending near the start point", () => {
+    const mouse = new Pointer("mouse");
+
+    API.setAppState({ currentItemStrokeShape: "fixed" });
+    UI.clickTool("freedraw");
+    mouse.downAt(10, 10);
+    mouse.moveTo(40, 10);
+    mouse.moveTo(30, 30);
+    mouse.upAt(12, 12);
+
+    const freedraw = window.h.elements.at(-1) as any;
+
+    expect(freedraw.points[0]).toEqual([0, 0]);
+    expect(freedraw.points.at(-1)).not.toEqual([0, 0]);
+  });
+
+  it("coalesces nearly straight fixed freedraw points at the tip", () => {
+    const mouse = new Pointer("mouse");
+
+    API.setAppState({ currentItemStrokeShape: "fixed" });
+    UI.clickTool("freedraw");
+    mouse.downAt(10, 10);
+
+    [
+      [10.2, 10.01],
+      [10.4, 10.03],
+      [10.6, 10.02],
+      [10.8, 10.04],
+      [11, 10.03],
+      [11.2, 10.05],
+      [11.4, 10.04],
+      [11.6, 10.06],
+      [11.8, 10.05],
+    ].forEach(([x, y]) => {
+      mouse.moveTo(x, y);
+    });
+    mouse.upAt(12, 10.05);
+
+    const freedraw = window.h.elements.at(-1) as any;
+
+    expect(freedraw.points.length).toBeLessThan(5);
+    expect(freedraw.points).toEqual([
+      [0, 0],
+      [2, 0.05],
+    ]);
+  });
+});

packages/excalidraw/tests/helpers/api.ts

@@ -201,6 +201,9 @@ export class API {
       ? ExcalidrawTextElement["containerId"]
       : never;
     points?: T extends "arrow" | "line" | "freedraw" ? readonly LocalPoint[] : never;
+    strokeShape?: T extends "freedraw"
+      ? ExcalidrawFreeDrawElement["strokeShape"]
+      : never;
     locked?: boolean;
     fileId?: T extends "image" ? string : never;
     scale?: T extends "image" ? ExcalidrawImageElement["scale"] : never;
@@ -318,6 +321,7 @@ export class API {
           type: type as "freedraw",
           simulatePressure: true,
           points: rest.points,
+          strokeShape: rest.strokeShape ?? appState.currentItemStrokeShape,
           ...base,
         });
         break;

packages/excalidraw/tests/helpers/ui.ts

@@ -28,6 +28,7 @@ import type { GlobalPoint, LocalPoint, Radians } from "@excalidraw/math";
 import type { TransformHandleType } from "@excalidraw/element";
 import type {
   ExcalidrawElement,
+  ExcalidrawFreeDrawElement,
   ExcalidrawLinearElement,
   ExcalidrawTextElement,
   ExcalidrawArrowElement,
@@ -432,8 +433,10 @@ type DrawingToolName = Exclude<
   "lock" | "selection" | "eraser" | "lasso"
 >;
 
-type Element<T extends DrawingToolName> = T extends "line" | "freedraw"
+type Element<T extends DrawingToolName> = T extends "line"
   ? ExcalidrawLinearElement
+  : T extends "freedraw"
+  ? ExcalidrawFreeDrawElement
   : T extends "arrow"
   ? ExcalidrawArrowElement
   : T extends "text"

packages/excalidraw/types.ts

@@ -33,6 +33,7 @@ import type {
   ExcalidrawNonSelectionElement,
   BindMode,
   ExcalidrawTextElement,
+  FreeDrawStrokeShape,
 } from "@excalidraw/element/types";
 
 import type {
@@ -358,6 +359,7 @@ export interface AppState {
   currentItemFillStyle: ExcalidrawElement["fillStyle"];
   currentItemStrokeWidth: number;
   currentItemStrokeStyle: ExcalidrawElement["strokeStyle"];
+  currentItemStrokeShape?: FreeDrawStrokeShape;
   currentItemRoughness: number;
   currentItemOpacity: number;
   currentItemFontFamily: FontFamilyValues;
@@ -888,7 +890,7 @@ export type PointerDownState = Readonly<{
   // We need to have these in the state so that we can unsubscribe them
   eventListeners: {
     // It's defined on the initial pointer down event
-    onMove: null | ReturnType<typeof throttleRAF>;
+    onMove: null | ((event: PointerEvent) => void);
     // It's defined on the initial pointer down event
     onUp: null | ((event: PointerEvent) => void);
     // It's defined on the initial pointer down event