Fix fixed angle orbiting

packages/element/src/binding.ts

@@ -15,7 +15,7 @@ import {
   PRECISION,
 } from "@excalidraw/math";
 
-import type { LocalPoint, Radians } from "@excalidraw/math";
+import type { LineSegment, LocalPoint, Radians } from "@excalidraw/math";
 
 import type { AppState } from "@excalidraw/excalidraw/types";
 
@@ -839,6 +839,7 @@ export const bindPointToSnapToElementOutline = (
   bindableElement: ExcalidrawBindableElement,
   startOrEnd: "start" | "end",
   elementsMap: ElementsMap,
+  customIntersector?: LineSegment<GlobalPoint>,
 ): GlobalPoint => {
   const aabb = aabbForElement(bindableElement, elementsMap);
   const localP =
@@ -881,16 +882,18 @@ export const bindPointToSnapToElementOutline = (
       isHorizontal ? center[0] : snapPoint[0],
       !isHorizontal ? center[1] : snapPoint[1],
     );
-    const intersector = lineSegment(
-      otherPoint,
-      pointFromVector(
-        vectorScale(
-          vectorNormalize(vectorFromPoint(snapPoint, otherPoint)),
-          Math.max(bindableElement.width, bindableElement.height) * 2,
-        ),
+    const intersector =
+      customIntersector ??
+      lineSegment(
         otherPoint,
-      ),
-    );
+        pointFromVector(
+          vectorScale(
+            vectorNormalize(vectorFromPoint(snapPoint, otherPoint)),
+            Math.max(bindableElement.width, bindableElement.height) * 2,
+          ),
+          otherPoint,
+        ),
+      );
     intersection = intersectElementWithLineSegment(
       bindableElement,
       elementsMap,
@@ -898,9 +901,8 @@ export const bindPointToSnapToElementOutline = (
       FIXED_BINDING_DISTANCE,
     ).sort(pointDistanceSq)[0];
   } else {
-    intersection = intersectElementWithLineSegment(
-      bindableElement,
-      elementsMap,
+    const intersector =
+      customIntersector ??
       lineSegment(
         adjacentPoint,
         pointFromVector(
@@ -911,7 +913,11 @@ export const bindPointToSnapToElementOutline = (
           ),
           adjacentPoint,
         ),
-      ),
+      );
+    intersection = intersectElementWithLineSegment(
+      bindableElement,
+      elementsMap,
+      intersector,
       FIXED_BINDING_DISTANCE,
     ).sort(
       (g, h) =>
@@ -936,6 +942,7 @@ export const getOutlineAvoidingPoint = (
   coords: GlobalPoint,
   pointIndex: number,
   elementsMap: ElementsMap,
+  customIntersector?: LineSegment<GlobalPoint>,
 ): GlobalPoint => {
   if (hoveredElement) {
     const newPoints = Array.from(element.points);
@@ -952,6 +959,7 @@ export const getOutlineAvoidingPoint = (
       hoveredElement,
       pointIndex === 0 ? "start" : "end",
       elementsMap,
+      customIntersector,
     );
   }
 

packages/element/src/linearElementEditor.ts

@@ -9,6 +9,7 @@ import {
   vectorFromPoint,
   curveLength,
   curvePointAtLength,
+  lineSegment,
 } from "@excalidraw/math";
 
 import { getCurvePathOps } from "@excalidraw/utils/shape";
@@ -322,6 +323,8 @@ export class LinearElementEditor {
     const draggingPoint = element.points[lastClickedPoint];
 
     if (selectedPointsIndices && draggingPoint) {
+      const elements = app.scene.getNonDeletedElements();
+
       if (
         shouldRotateWithDiscreteAngle(event) &&
         selectedPointsIndices.length === 1 &&
@@ -336,7 +339,6 @@ export class LinearElementEditor {
             element.points[selectedIndex][1] - referencePoint[1],
             element.points[selectedIndex][0] - referencePoint[0],
           );
-
         const [width, height] = LinearElementEditor._getShiftLockedDelta(
           element,
           elementsMap,
@@ -345,22 +347,32 @@ export class LinearElementEditor {
           event[KEYS.CTRL_OR_CMD] ? null : app.getEffectiveGridSize(),
           customLineAngle,
         );
-
+        const [x, y] = LinearElementEditor.getPointGlobalCoordinates(
+          element,
+          pointFrom<LocalPoint>(
+            width + referencePoint[0],
+            height + referencePoint[1],
+          ),
+          elementsMap,
+        );
         LinearElementEditor.movePoints(
           element,
           app.scene,
-          new Map([
-            [
-              selectedIndex,
-              {
-                point: pointFrom(
-                  width + referencePoint[0],
-                  height + referencePoint[1],
-                ),
-                isDragging: selectedIndex === lastClickedPoint,
-              },
-            ],
-          ]),
+          pointDraggingUpdates(
+            selectedPointsIndices,
+            0,
+            0,
+            elementsMap,
+            lastClickedPoint,
+            element,
+            x,
+            y,
+            linearElementEditor,
+            event[KEYS.CTRL_OR_CMD] ? null : app.getEffectiveGridSize(),
+            elements,
+            app,
+            true,
+          ),
         );
       } else {
         const newDraggingPointPosition = LinearElementEditor.createPointAt(
@@ -372,7 +384,6 @@ export class LinearElementEditor {
         );
         const deltaX = newDraggingPointPosition[0] - draggingPoint[0];
         const deltaY = newDraggingPointPosition[1] - draggingPoint[1];
-        const elements = app.scene.getNonDeletedElements();
 
         LinearElementEditor.movePoints(
           element,
@@ -995,7 +1006,6 @@ export class LinearElementEditor {
 
     if (shouldRotateWithDiscreteAngle(event) && points.length >= 2) {
       const lastCommittedPoint = points[points.length - 2];
-
       const [width, height] = LinearElementEditor._getShiftLockedDelta(
         element,
         elementsMap,
@@ -1937,6 +1947,7 @@ const pointDraggingUpdates = (
   gridSize: NullableGridSize,
   elements: readonly Ordered<NonDeletedExcalidrawElement>[],
   app: AppClassProperties,
+  angleLocked?: boolean,
 ): PointsPositionUpdates => {
   const [, , , , cx, cy] = getElementAbsoluteCoords(element, elementsMap, true);
   const hasMidPoints =
@@ -2001,12 +2012,29 @@ const pointDraggingUpdates = (
           app.state.bindMode === "orbit" &&
           !otherPointInsideElement
         ) {
+          let customIntersector;
+          if (angleLocked) {
+            const adjacentPointIndex =
+              pointIndex === 0 ? 1 : element.points.length - 2;
+            const globalAdjacentPoint =
+              LinearElementEditor.getPointAtIndexGlobalCoordinates(
+                element,
+                adjacentPointIndex,
+                elementsMap,
+              );
+            customIntersector = lineSegment<GlobalPoint>(
+              globalAdjacentPoint,
+              newGlobalPointPosition,
+            );
+          }
+
           newGlobalPointPosition = getOutlineAvoidingPoint(
             element,
             hoveredElement,
             newGlobalPointPosition,
             pointIndex,
             elementsMap,
+            customIntersector,
           );
         }
 

packages/excalidraw/components/App.tsx

@@ -17,6 +17,7 @@ import {
   vectorDot,
   vectorNormalize,
   pointsEqual,
+  lineSegment,
 } from "@excalidraw/math";
 
 import {
@@ -6132,11 +6133,29 @@ class App extends React.Component<AppProps, AppState> {
           { informMutation: false, isDragging: false },
         );
       } else {
-        let [gridX, gridY] = getGridPoint(
+        const [lastCommittedX, lastCommittedY] =
+          multiElement?.lastCommittedPoint ?? [0, 0];
+
+        // Handle grid snapping
+        const [gridX, gridY] = getGridPoint(
           scenePointerX,
           scenePointerY,
           event[KEYS.CTRL_OR_CMD] ? null : this.getEffectiveGridSize(),
         );
+        let dxFromLastCommitted = gridX - rx - lastCommittedX;
+        let dyFromLastCommitted = gridY - ry - lastCommittedY;
+
+        if (shouldRotateWithDiscreteAngle(event)) {
+          ({ width: dxFromLastCommitted, height: dyFromLastCommitted } =
+            getLockedLinearCursorAlignSize(
+              // actual coordinate of the last committed point
+              lastCommittedX + rx,
+              lastCommittedY + ry,
+              // cursor-grid coordinate
+              gridX,
+              gridY,
+            ));
+        }
 
         if (
           isArrowElement(multiElement) &&
@@ -6172,38 +6191,31 @@ class App extends React.Component<AppProps, AppState> {
                 pointFrom<GlobalPoint>(scenePointerX, scenePointerY),
                 multiElement.points.length - 1,
                 this.scene.getNonDeletedElementsMap(),
+                shouldRotateWithDiscreteAngle(event)
+                  ? lineSegment<GlobalPoint>(
+                      otherPoint,
+                      pointFrom<GlobalPoint>(
+                        multiElement.x + lastCommittedX + dxFromLastCommitted,
+                        multiElement.y + lastCommittedY + dyFromLastCommitted,
+                      ),
+                    )
+                  : undefined,
               );
-            gridX = avoidancePoint
+            const x = avoidancePoint
               ? avoidancePoint[0]
               : hoveredElement
               ? scenePointerX
               : gridX;
-            gridY = avoidancePoint
+            const y = avoidancePoint
               ? avoidancePoint[1]
               : hoveredElement
               ? scenePointerY
               : gridY;
+            dxFromLastCommitted = x - rx - lastCommittedX;
+            dyFromLastCommitted = y - ry - lastCommittedY;
           }
         }
 
-        const [lastCommittedX, lastCommittedY] =
-          multiElement?.lastCommittedPoint ?? [0, 0];
-
-        let dxFromLastCommitted = gridX - rx - lastCommittedX;
-        let dyFromLastCommitted = gridY - ry - lastCommittedY;
-
-        if (shouldRotateWithDiscreteAngle(event)) {
-          ({ width: dxFromLastCommitted, height: dyFromLastCommitted } =
-            getLockedLinearCursorAlignSize(
-              // actual coordinate of the last committed point
-              lastCommittedX + rx,
-              lastCommittedY + ry,
-              // cursor-grid coordinate
-              gridX,
-              gridY,
-            ));
-        }
-
         if (isPathALoop(points, this.state.zoom.value)) {
           setCursor(this.interactiveCanvas, CURSOR_TYPE.POINTER);
         }
@@ -9089,6 +9101,15 @@ class App extends React.Component<AppProps, AppState> {
           let dx = gridX - newElement.x;
           let dy = gridY - newElement.y;
 
+          if (shouldRotateWithDiscreteAngle(event) && points.length === 2) {
+            ({ width: dx, height: dy } = getLockedLinearCursorAlignSize(
+              newElement.x,
+              newElement.y,
+              pointerCoords.x,
+              pointerCoords.y,
+            ));
+          }
+
           if (
             !isElbowArrow(newElement) &&
             this.state.editingLinearElement &&
@@ -9119,6 +9140,20 @@ class App extends React.Component<AppProps, AppState> {
                         : pointFrom(gridX, gridY),
                       newElement.points.length - 1,
                       elementsMap,
+                      shouldRotateWithDiscreteAngle(event) &&
+                        points.length === 2
+                        ? lineSegment(
+                            LinearElementEditor.getPointGlobalCoordinates(
+                              newElement,
+                              points[0],
+                              elementsMap,
+                            ),
+                            pointFrom<GlobalPoint>(
+                              newElement.x + dx,
+                              newElement.y + dy,
+                            ),
+                          )
+                        : undefined,
                     )
                   : pointFrom(gridX, gridY);
 
@@ -9176,15 +9211,6 @@ class App extends React.Component<AppProps, AppState> {
             }
           }
 
-          if (shouldRotateWithDiscreteAngle(event) && points.length === 2) {
-            ({ width: dx, height: dy } = getLockedLinearCursorAlignSize(
-              newElement.x,
-              newElement.y,
-              pointerCoords.x,
-              pointerCoords.y,
-            ));
-          }
-
           if (points.length === 1) {
             this.scene.mutateElement(
               newElement,