Show a clickable symbol for colliders in the scene view

Colliders were the only placed part without a symbol in the scene view. A collider that sits exactly on its sprite was hard to find and could only be picked by its outline. - The symbol is the box with four corner handles from the asset panel. It stays upright and has a fixed size in world units. - colliderColor() holds the colour rule of the outline (green, trigger colour, red for a shape that collides with nothing). The outline and the symbol share it. - The symbol sits 28 units left of the collider centre. The sprite centre stays free for grabbing the sprite, and a rigidbody symbol on the same spot is not covered. - The symbol has its own 26x26 hit area and the outline's handler. A click selects the collider and a drag moves it. sceneStack counts it as a hit under the pointer. - The hook __gm.sceneIcon(id) also returns x, y, color, screen and clickable. Findings: - With the clickable symbol on the sprite centre, four checks in 01 and 09 dragged the collider instead of the crate. That is why the symbol moved beside the centre. Tests: - ./check.sh: 153 files, 2237 tests, CHECK EXIT 0 (was 152 / 2234). - New unit test for colliderColor. svg-icons.test.ts lists the collider symbol. - e2e 41b: 3 new checks (beside the centre without and with a rigidbody, click selects the collider). - e2e 1-16,39-43: ALL PASSED, 635 checks. e2e 41 alone: 20 checks. - Counter-probes: no symbol fails both placement checks. A symbol without hit area fails only the click check. - Check total 1348 + 3 = 1351, computed, not yet measured by CI. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-23 19:18:10 +02:00
1 parent abf3b1f618
commit e3d47ca9c1
@@ -43,7 +43,7 @@ npm run build        # writes dist/ and regenerates index.html; the folder is wh
 The browser suite and the three example games need a machine with a GPU:

 ```bash
-node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 1348 checks (GM_STEPS=20 for one step)
+node tools/seed-e2e.mjs && node tools/e2e.mjs      # the editor, 1351 checks (GM_STEPS=20 for one step)
                                                   #   every tool signs in first – see the Accounts page
 node tools/seed-jumprun.mjs && node tools/smoke-jumprun.mjs
 node tools/seed-tetris.mjs && node tools/smoke-tetris.mjs
@@ -3,7 +3,7 @@
 * copy, so live positions are visible and stay editable. A container's template is the same
 * work on the same shape of data, so the Container tab subclasses this and swaps `holder()`.
 */
-import { type FederatedPointerEvent, Graphics, Text } from 'pixi.js';
+import { type FederatedPointerEvent, Graphics, Rectangle, Text } from 'pixi.js';
 import { oneStep } from '../../core/commands/CompoundCommand';
 import { MoveSceneObjectCommand, PlaceAssetCommand } from '../../core/commands/sceneObjectCommands';
 import { hasSceneIcon } from '../../core/model/AssetTypes';
@@ -13,6 +13,7 @@ import {
  apply as applyPoint,
  applyVector,
  type Extent,
+  IDENTITY,
  invert,
  linearOf,
  type Mat,
@@ -31,7 +32,8 @@ import { collectHolderItems, type DrawItem } from '../../viewport/items';
 import { menuTargetOf, type PointerHit, pressOn, stackAt } from '../../viewport/pick';
 import { openObjectMenu } from '../objectMenu';
 import { type LayerFocus, layerAlpha } from '../../viewport/tilemap';
-import { dashedLine } from '../../viewport/symbols';
+import { colliderShape } from '../../core/properties/collider';
+import { colliderColor, dashedLine } from '../../viewport/symbols';
 import { drawSymbolIcon } from '../../viewport/symbolIcons';
 import { screenToWorld, type View, worldToScreen } from '../../viewport/view';
 import { type CastRay, RAY_SHOWN, type World } from '../../runtime/World';
@@ -80,6 +82,11 @@ export interface GizmoInfo {

 const OFF_GIZMO_ALPHA = 0.45;

+/** World units a collider's icon stands left of the collider's centre. */
+const ICON_CLEARANCE = 28;
+/** Half the side of a collider icon's clickable square, in world units – the SVG's view box. */
+const ICON_HALF = 13;
+
 /** Owner links in the colour of the icon they leave; anything else in the muted default. */
 const LINK_COLORS: Partial<Record<DrawItem['type'], number>> = {
  behavior: Theme.colors.behavior,
@@ -93,6 +100,7 @@ export class SceneViewport extends FreeViewport {
  private readonly gizmos = new Graphics();
  private readonly labels = new Map<string, Text>();
  private readonly icons = new Map<string, Graphics>();
+  private readonly iconColors = new Map<string, number>();
  private readonly solids = new TilemapSolidOutlines(this.overlay);
  private readonly host: SceneViewHost = {
    state: this.state,
@@ -407,7 +415,11 @@ export class SceneViewport extends FreeViewport {
      const node = this.nodes.get(item.id);
      if (!node?.visible || node.eventMode === 'none') continue;
      const p = node.toLocal(global);
-      if (!(node.hitArea ? node.hitArea.contains(p.x, p.y) : node.containsPoint(p))) continue;
+      if (
+        !this.onIcon(item.id, global) &&
+        !(node.hitArea ? node.hitArea.contains(p.x, p.y) : node.containsPoint(p))
+      )
+        continue;
      if (item.type !== 'tilemap') {
        hits.push({ id: item.id, layers: null });
        continue;
@@ -424,6 +436,14 @@ export class SceneViewport extends FreeViewport {
    return hits;
  }

+  /** Whether the pointer is on the clickable icon of this object – a collider's. */
+  private onIcon(id: string, global: Vec2): boolean {
+    const icon = this.icons.get(id);
+    if (!icon?.visible || icon.eventMode === 'none' || !icon.hitArea) return false;
+    const p = icon.toLocal(global);
+    return icon.hitArea.contains(p.x, p.y);
+  }
+
  /** What is under the pointer, front to back as drawn (#203). */
  private stackUnder(e: FederatedPointerEvent): string[] {
    return stackAt(this.lastItems, this.hitsUnder(e.global));
@@ -512,6 +532,7 @@ export class SceneViewport extends FreeViewport {
    this.labels.delete(id);
    this.icons.get(id)?.destroy();
    this.icons.delete(id);
+    this.iconColors.delete(id);
    this.solids.dispose(id);
  }

@@ -520,39 +541,82 @@ export class SceneViewport extends FreeViewport {
    return this.solids.info(this.lastItems.find((i) => i.id === id));
  }

-  /** The icon of a particle source, the name beside it and whether it hangs off its owner (test hook). */
-  iconInfo(id: string): { layer: string; visible: boolean; label: string; link: boolean } | null {
+  /**
+   * The icon of a particle source or collider, in world units, the name beside it and whether it
+   * hangs off its owner (test hook).
+   */
+  iconInfo(id: string): {
+    layer: string;
+    visible: boolean;
+    label: string;
+    link: boolean;
+    x: number;
+    y: number;
+    color: number | null;
+    screen: Vec2;
+    clickable: boolean;
+  } | null {
    const icon = this.icons.get(id);
    if (!icon) return null;
    const label = this.labels.get(id);
+    const screen = icon.getGlobalPosition();
    return {
      layer: icon.parent === this.overlay ? 'overlay' : 'objects',
      visible: icon.visible,
      label: label?.visible ? label.text : '',
      link: this.lastLinks.includes(id),
+      x: icon.position.x,
+      y: icon.position.y,
+      color: this.iconColors.get(id) ?? null,
+      screen: { x: screen.x, y: screen.y },
+      clickable: icon.eventMode !== 'none',
    };
  }

  /**
   * A source draws only its particles, so without a mark of its own an empty one is invisible and
   * cannot be found (#89). The mark is a decoration rather than a symbol: `GameViewport` never syncs
-   * decorations, so it is editor-only without the source leaving the running game.
+   * decorations, so it is editor-only without the source leaving the running game. A collider gets
+   * one too, like every other symbol: a thin outline around a sprite is easily missed. Its icon is
+   * clicked like the outline – a source's square already covers its own – and stands left of the
+   * collider's centre: the middle of the sprite it sits on stays free for grabbing the sprite, and
+   * a rigidbody's icon on the same centre stays uncovered (its name stands to its right).
   */
  private syncIcon(item: DrawItem, show: boolean): void {
    let icon = this.icons.get(item.id);
-    if (!show || item.type !== 'particles') {
-      if (icon) icon.visible = false;
+    const type = item.type === 'particles' || item.type === 'collider' ? item.type : null;
+    if (!show || !type) {
+      if (icon) {
+        icon.visible = false;
+        icon.eventMode = 'none';
+      }
      return;
    }
    if (!icon) {
      icon = new Graphics();
      icon.eventMode = 'none';
-      drawSymbolIcon(icon, 'particles');
+      if (type === 'collider') {
+        icon.hitArea = new Rectangle(-ICON_HALF, -ICON_HALF, ICON_HALF * 2, ICON_HALF * 2);
+        icon.cursor = 'move';
+        icon.on('pointerdown', (e: FederatedPointerEvent) => this.onItemPointerDown(item.id, e));
+      }
      this.icons.set(item.id, icon);
      this.overlay.addChild(icon);
    }
+    if (type === 'collider') icon.eventMode = 'static';
+    // A collider's icon takes the colour of its outline: a trigger's, or red for a shape that
+    // collides with nothing.
+    const color =
+      type === 'collider'
+        ? colliderColor(colliderShape(item.props, IDENTITY, item.frame), item.props)
+        : Theme.colors.particles;
+    if (this.iconColors.get(item.id) !== color) {
+      icon.clear();
+      drawSymbolIcon(icon, type, color);
+      this.iconColors.set(item.id, color);
+    }
    icon.visible = true;
-    icon.position.set(item.x, item.y);
+    icon.position.set(type === 'collider' ? item.x - ICON_CLEARANCE : item.x, item.y);
  }

  private syncGrid(): void {
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="-13 -13 26 26" width="26" height="26">
+  <!-- A bounding box with its corner handles, as in the asset panel. -->
+  <rect x="-9" y="-9" width="18" height="18" fill="currentColor" fill-opacity="0.25" stroke="currentColor" stroke-width="2" />
+  <rect x="-12" y="-12" width="6" height="6" fill="currentColor" />
+  <rect x="6" y="-12" width="6" height="6" fill="currentColor" />
+  <rect x="-12" y="6" width="6" height="6" fill="currentColor" />
+  <rect x="6" y="6" width="6" height="6" fill="currentColor" />
+</svg>
@@ -3,23 +3,32 @@ import type { Graphics } from 'pixi.js';
 import { drawSvg, Theme } from '../ui';
 import behavior from './icons/behavior.svg?raw';
 import camera from './icons/camera.svg?raw';
+import collider from './icons/collider.svg?raw';
 import container from './icons/container.svg?raw';
 import particles from './icons/particles.svg?raw';
 import rigidbody from './icons/rigidbody.svg?raw';

-export type SymbolIcon = 'behavior' | 'camera' | 'container' | 'particles' | 'rigidbody';
+export type SymbolIcon = 'behavior' | 'camera' | 'collider' | 'container' | 'particles' | 'rigidbody';

-export const SYMBOL_SVG: Record<SymbolIcon, string> = { behavior, camera, container, particles, rigidbody };
+export const SYMBOL_SVG: Record<SymbolIcon, string> = {
+  behavior,
+  camera,
+  collider,
+  container,
+  particles,
+  rigidbody,
+};

 const SYMBOL_COLOR: Record<SymbolIcon, number> = {
  behavior: Theme.colors.behavior,
  camera: Theme.colors.textMuted,
+  collider: Theme.colors.collider,
  container: Theme.colors.container,
  particles: Theme.colors.particles,
  rigidbody: Theme.colors.collider,
 };

-/** Adds the icon to what `node` already draws. */
-export function drawSymbolIcon(node: Graphics, icon: SymbolIcon): void {
-  drawSvg(node, SYMBOL_SVG[icon], SYMBOL_COLOR[icon]);
+/** Adds the icon to what `node` already draws; `color` for one that changes, like a trigger's. */
+export function drawSymbolIcon(node: Graphics, icon: SymbolIcon, color = SYMBOL_COLOR[icon]): void {
+  drawSvg(node, SYMBOL_SVG[icon], color);
 }
@@ -12,7 +12,7 @@ import {
 } from '../core/properties/collider';
 import { SHEET_EDGE } from '../core/shader/nodes';
 import type { NineSlice } from '../core/model/texture';
-import type { Vec2 } from '../core/model/Properties';
+import type { PropertyBag, Vec2 } from '../core/model/Properties';
 import { closestOnSegment } from '../core/util/vec';
 import { Theme } from '../ui';
 import type { DrawItem } from './items';
@@ -153,14 +153,7 @@ export function drawItem(
      // collider sits on.
      const shape = colliderShape(item.props, IDENTITY, item.frame);
      traceShape(node, shape);
-      // A polygon that crosses itself collides with nothing, and says so in red – as does a frame
-      // outline without a frame or without a drawn outline (#193).
-      const color =
-        shape.kind === 'polygon' && shape.pieces.length === 0
-          ? Theme.colors.danger
-          : isTrigger(item.props)
-            ? Theme.colors.trigger
-            : Theme.colors.collider;
+      const color = colliderColor(shape, item.props);
      node.fill({ color, alpha: 0.12 }).stroke({ width: 2 / scale, color });
      const facing = oneWayFacing(item.props, IDENTITY);
      if (facing)
@@ -176,6 +169,15 @@ export function drawItem(
  }
 }

+/**
+ * The colour of a collider's outline and icon. A polygon that crosses itself collides with nothing,
+ * and says so in red – as does a frame outline without a frame or without a drawn outline (#193).
+ */
+export function colliderColor(shape: ColliderShape, props: PropertyBag): number {
+  if (shape.kind === 'polygon' && shape.pieces.length === 0) return Theme.colors.danger;
+  return isTrigger(props) ? Theme.colors.trigger : Theme.colors.collider;
+}
+
 /** How far the landing cone of a one-way side reaches, in screen pixels (#159). */
 export const CONE_LENGTH = 24;

@@ -28,6 +28,7 @@ describe('icon files', () => {
    expect(Object.keys(SYMBOL_SVG).sort()).toEqual([
      'behavior',
      'camera',
+      'collider',
      'container',
      'particles',
      'rigidbody',
@@ -0,0 +1,23 @@
+import { describe, expect, it } from 'vitest';
+import { IDENTITY } from '../../src/core/model/matrix';
+import type { PropertyBag } from '../../src/core/model/Properties';
+import { colliderShape } from '../../src/core/properties/collider';
+import { Theme } from '../../src/ui';
+import { colliderColor } from '../../src/viewport/symbols';
+
+const colorOf = (props: PropertyBag) => colliderColor(colliderShape(props, IDENTITY), props);
+
+describe('the colour of a collider in the scene view, outline and icon alike', () => {
+  it('is the collider colour, the trigger colour for a trigger, red for a shape that collides with nothing', () => {
+    expect(colorOf({ shape: 'box', width: 40, height: 40 })).toBe(Theme.colors.collider);
+    expect(colorOf({ shape: 'circle', radius: 20, isTrigger: true })).toBe(Theme.colors.trigger);
+    const bowtie = [
+      { x: -10, y: -10 },
+      { x: 10, y: 10 },
+      { x: 10, y: -10 },
+      { x: -10, y: 10 },
+    ];
+    expect(colorOf({ shape: 'polygon', points: bowtie })).toBe(Theme.colors.danger);
+    expect(colorOf({ shape: 'polygon', points: bowtie, isTrigger: true })).toBe(Theme.colors.danger);
+  });
+});
@@ -154,6 +154,56 @@ export async function physics(t) {
  await evaluate(`__gm.lookAt(0, ${Y + 100})`);
  await settle();
  await shot('41-rigidbody');
+  // A collider has an icon like every other symbol. It stands left of the collider's centre, so the
+  // middle of its sprite stays free, and so does a rigidbody's icon on the same spot.
+  const icons = {
+    ground: await json(`__gm.sceneIcon('phys-ground-col')`),
+    crate: await json(`__gm.sceneIcon('phys-crate-col')`),
+    ball: await json(`__gm.sceneIcon('phys-ball-col')`),
+  };
+  check(
+    'a collider without a rigidbody shows its icon left of its centre',
+    icons.ground?.visible === true &&
+      icons.ground.layer === 'overlay' &&
+      icons.ground.x === -28 &&
+      icons.ground.y === Y + 200 &&
+      icons.ground.color !== null,
+    JSON.stringify(icons.ground),
+  );
+  check(
+    "a collider's icon steps aside from the rigidbody on the same body, in the same colour",
+    [
+      [icons.crate, -100],
+      [icons.ball, 100],
+    ].every(([icon, x]) => icon?.visible === true && icon.x === x - 28 && icon.y === Y) &&
+      icons.crate.color === icons.ground.color,
+    JSON.stringify(icons),
+  );
+  // The icon is clicked like the outline: it selects the collider, even over its sprite. On the
+  // middle of the sprite, beside the icon, the sprite is picked as before.
+  const selectedId = async () => {
+    const s = await state();
+    return s.selection?.kind === 'object' ? s.selection.objectId : null;
+  };
+  const picks = {};
+  for (const [name, id, dx] of [
+    ['groundIcon', 'phys-ground-col', 0],
+    ['crateIcon', 'phys-crate-col', 0],
+    ['groundMiddle', 'phys-ground', null],
+  ]) {
+    await select(null);
+    const at = await json(dx === null ? `__gm.objectScreen('${id}')` : `__gm.sceneIcon('${id}')?.screen`);
+    await click(at.x + (dx ?? 0), at.y);
+    picks[name] = { selected: await selectedId() };
+  }
+  check(
+    "a click on a collider's icon selects the collider, on the sprite's middle the sprite",
+    icons.ground.clickable === true &&
+      picks.groundIcon.selected === 'phys-ground-col' &&
+      picks.crateIcon.selected === 'phys-crate-col' &&
+      picks.groundMiddle.selected === 'phys-ground',
+    JSON.stringify(picks),
+  );

  await selectObject('phys-ball-col');
  const field = await inView(t, '__gm.inspectorRect()', "__gm.inspectorField('Bounciness')");