wip: hitbox test visualizer

src/element/textElement.ts

@@ -744,19 +744,18 @@ export const isHittingContainerStroke = (
   );
 
   const strokeWidth = container.strokeWidth;
-  const threshold = 10 / zoom;
-
   if (container.type === "ellipse") {
+    const threshold = 10 * zoom;
     const h = (topLeft[0] + topRight[0]) / 2;
     const k = (topLeft[1] + bottomLeft[1]) / 2;
-    let a = container.width / 2 + strokeWidth / 2 + threshold;
-    let b = container.height / 2 + strokeWidth / 2 + threshold;
+    let a = container.width / 2 + threshold;
+    let b = container.height / 2 + threshold;
     const checkPointOnOuterEllipse =
       Math.pow(counterRotateX - h, 2) / Math.pow(a, 2) +
       Math.pow(counterRotateY - k, 2) / Math.pow(b, 2);
 
-    a = container.width / 2 - strokeWidth / 2 - threshold;
-    b = container.height / 2 - strokeWidth / 2 - threshold;
+    a = container.width / 2 - strokeWidth - threshold;
+    b = container.height / 2 - strokeWidth - threshold;
 
     const checkPointOnInnerEllipse =
       Math.pow(counterRotateX - h, 2) / Math.pow(a, 2) +
@@ -773,11 +772,12 @@ export const isHittingContainerStroke = (
     }
     return false;
   }
+  const threshold = 10 / zoom;
 
   // Left Stroke
   if (
-    counterRotateX >= topLeft[0] - strokeWidth / 2 - threshold &&
-    counterRotateX <= topLeft[0] + strokeWidth / 2 + threshold &&
+    counterRotateX >= topLeft[0] - threshold &&
+    counterRotateX <= topLeft[0] + strokeWidth + threshold &&
     counterRotateY >= topLeft[1] - threshold &&
     counterRotateY <= bottomRight[1] + threshold
   ) {
@@ -787,16 +787,16 @@ export const isHittingContainerStroke = (
   if (
     counterRotateX >= topLeft[0] - threshold &&
     counterRotateX <= topRight[0] + threshold &&
-    counterRotateY >= topLeft[1] - threshold - strokeWidth / 2 &&
-    counterRotateY <= topLeft[1] + threshold + strokeWidth / 2
+    counterRotateY >= topLeft[1] - threshold &&
+    counterRotateY <= topLeft[1] + threshold + strokeWidth
   ) {
     return true;
   }
 
   // Right stroke
   if (
-    counterRotateX >= topRight[0] - threshold - strokeWidth / 2 &&
-    counterRotateX <= topRight[0] + threshold + strokeWidth / 2 &&
+    counterRotateX >= topRight[0] - threshold - strokeWidth &&
+    counterRotateX <= topRight[0] + threshold &&
     counterRotateY >= topRight[1] - threshold &&
     counterRotateY <= bottomRight[1] + threshold
   ) {
@@ -807,8 +807,8 @@ export const isHittingContainerStroke = (
   if (
     counterRotateX >= bottomLeft[0] - threshold &&
     counterRotateX <= bottomRight[0] + threshold &&
-    counterRotateY >= bottomLeft[1] - threshold - strokeWidth / 2 &&
-    counterRotateY <= bottomLeft[1] + threshold + strokeWidth / 2
+    counterRotateY >= bottomLeft[1] - threshold - strokeWidth &&
+    counterRotateY <= bottomLeft[1] + threshold
   ) {
     return true;
   }

src/renderer/renderScene.ts

@@ -37,7 +37,10 @@ import {
   getSelectedGroupIds,
   getElementsInGroup,
 } from "../groups";
-import { maxBindingGap } from "../element/collision";
+import {
+  isHittingElementNotConsideringBoundingBox,
+  maxBindingGap,
+} from "../element/collision";
 import {
   SuggestedBinding,
   SuggestedPointBinding,
@@ -60,6 +63,8 @@ import {
   getLinkHandleFromCoords,
 } from "../element/Hyperlink";
 import { isLinearElement } from "../element/typeChecks";
+import { rotatePoint } from "../math";
+import { isHittingContainerStroke } from "../element/textElement";
 
 const hasEmojiSupport = supportsEmoji();
 export const DEFAULT_SPACING = 2;
@@ -407,9 +412,44 @@ export const _renderScene = ({
 
     let editingLinearElement: NonDeleted<ExcalidrawLinearElement> | undefined =
       undefined;
+    let idx = -1;
     visibleElements.forEach((element) => {
+      idx++;
       try {
+        const useProdAlgo = idx % 2 === 0;
+        context.fillStyle = useProdAlgo ? "lime" : "red";
+        const padding = 40 / renderConfig.zoom.value;
+        const bounds = getCommonBounds([element]);
+        const box = [
+          bounds[0] + renderConfig.scrollX,
+          bounds[1] + renderConfig.scrollY,
+          bounds[2] + renderConfig.scrollX,
+          bounds[3] + renderConfig.scrollY,
+        ];
+        for (let x = box[0] - padding; x < box[2] + padding; x++) {
+          for (let y = box[1] - padding; y < box[3] + padding; y++) {
+            const sceneX = x - renderConfig.scrollX;
+            const sceneY = y - renderConfig.scrollY;
+            if (
+              useProdAlgo
+                ? isHittingElementNotConsideringBoundingBox(element, appState, [
+                    sceneX,
+                    sceneY,
+                  ])
+                : isHittingContainerStroke(
+                    sceneX,
+                    sceneY,
+                    // @ts-ignore
+                    element,
+                    renderConfig.zoom.value,
+                  )
+            ) {
+              context.fillRect(x, y, 1, 1);
+            }
+          }
+        }
         renderElement(element, rc, context, renderConfig, appState);
+
         // Getting the element using LinearElementEditor during collab mismatches version - being one head of visible elements due to
         // ShapeCache returns empty hence making sure that we get the
         // correct element from visible elements