feat(Bounds): add component, demo, docs (#408)

docs/.vitepress/config.ts

@@ -169,6 +169,7 @@ export default defineConfig({
           { text: 'Align', link: '/guide/staging/align' },
           { text: 'SoftShadows', link: '/guide/staging/soft-shadows' },
           { text: 'Grid', link: '/guide/staging/grid' },
+          { text: 'Bounds', link: '/guide/staging/bounds' },
           { text: 'RandomizedLights', link: '/guide/staging/randomized-lights' },
         ],
       },

docs/.vitepress/theme/components/BoundsDemo.vue

@@ -0,0 +1,32 @@
+<script setup lang="ts">
+import { Bounds, OrbitControls } from '@tresjs/cientos'
+import { TresCanvas } from '@tresjs/core'
+import { Vector3 } from 'three'
+import { shallowRef } from 'vue'
+
+const { sin, cos, PI } = Math
+const positions = Array.from(
+  { length: 8 },
+  (_, i) => new Vector3(cos(i * PI / 4) * 4, sin(i * PI / 4) * 4, 0),
+)
+
+const b = shallowRef()
+</script>
+
+<template>
+  <TresCanvas clear-color="#4f4f4f">
+    <TresPerspectiveCamera :position="[0, 0, -15]" />
+    <OrbitControls make-default />
+    <Bounds ref="b" clip use-mounted :offset="0.75">
+      <TresMesh
+        v-for="p, i of positions"
+        :key="i"
+        :position="p"
+        @click="(e) => b.instance.lookAt(e.object)"
+      >
+        <TresBoxGeometry />
+        <TresMeshNormalMaterial />
+      </TresMesh>
+    </Bounds>
+  </TresCanvas>
+</template>

docs/component-list/components.ts

@@ -71,6 +71,8 @@ export default [
       {
         text: 'PointMaterial',
         link: '/guide/materials/point-material',
+      },
+      {
         text: 'MeshDiscardMaterial',
         link: '/guide/materials/mesh-discard-material',
       },
@@ -120,6 +122,7 @@ export default [
       { text: 'Align', link: '/guide/staging/align' },
       { text: 'SoftShadows', link: '/guide/staging/soft-shadows' },
       { text: 'Grid', link: '/guide/staging/grid' },
+      { text: 'Bounds', link: '/guide/staging/bounds' },
       { text: 'RandomizedLights', link: '/guide/staging/randomized-lights' },
     ],
   },

docs/guide/staging/bounds.md

@@ -0,0 +1,68 @@
+# Bounds
+
+<DocsDemo>
+    <BoundsDemo />
+</DocsDemo>
+
+Calculates a boundary box and centers the camera accordingly. Its `lookAt` method accepts a target to look at imperatively e.g., after a click.
+
+::: info
+If you are using other camera controls, be sure to make them the 'default'.
+```vue
+<OrbitControls make-default />
+```
+:::
+
+## Usage
+
+<<< @/.vitepress/theme/components/BoundsDemo.vue
+
+## Props
+
+| Name | Description | Default |
+| :--- | :--- | ---- |
+| `duration` | Duration of the `lookAt` animation in seconds | `1.0` |
+| `offset` | Additional distance from the target when using `lookAt` with a `Box3` or `Object3D` | `0.2` |
+| `useResize` | Whether to re`lookAt` the last target when the screen is resized | `false` |
+| `useMounted` | Whether to `lookAt` the `Bounds` object when the component is mounts | `false` |
+| `clip` | Whether to adjust the camera's `near` and `far` settings when using `lookAt` | `false` |
+| `easing` | Animation's easing function. `t` and the returned value should be in the interval `[0, 1]` | Cubic ease out |
+
+## `lookAt`
+
+`<Bounds />` `lookAt` points the camera at its first argument: an `Object3D`, `Box3` or `Vector3`.
+
+```
+  /**
+   * Calculates a boundary box around an `Object3D` and centers the camera accordingly.
+   */
+  lookAt(object: Object3D): void
+  /**
+   * Calculates a boundary box around an `Object3D` and centers the camera accordingly and animates the camera's `up` vector.
+   */
+  lookAt(object: Object3D, up: VectorFlexibleParams): void
+  /**
+   * Centers the camera's viewport on a `Box3`.
+   */
+  lookAt(box3: Box3): void
+  /**
+   * Centers the camera's viewport on a `Box3` and animates the camera's `up` vector.
+   */
+  lookAt(box3: Box3, up: VectorFlexibleParams): void
+  /**
+   * Look at a `Vector3`.
+   */
+  lookAt(target: VectorFlexibleParams): void
+  /**
+   * Look at a `Vector3`, if provided. Move the camera to `position`.
+   */
+  lookAt(target: VectorFlexibleParams | undefined | null, position: VectorFlexibleParams): void
+  /**
+   * Look at a `Vector3`, if provided. Move the camera to `position` and animate the camera's `up` vector.
+   */
+  lookAt(target: VectorFlexibleParams | undefined | null, position: VectorFlexibleParams, up: VectorFlexibleParams): void
+  /**
+   * Rerun `lookAt` using the prior arguments. If `lookAt` has never been called, uses the `Bounds` object.
+   */
+  lookAt(): void
+```

playground/vue/src/pages/staging/BoundsDemo.vue

@@ -0,0 +1,145 @@
+<script setup lang="ts">
+import { TresCanvas } from '@tresjs/core'
+import { Bounds, Grid, OrbitControls } from '@tresjs/cientos'
+import { Vector3 } from 'three'
+import { TresLeches, useControls } from '@tresjs/leches'
+import '@tresjs/leches/styles'
+import { computed, shallowRef } from 'vue'
+
+const c = useControls({
+  duration: { value: 0.5, min: 0, max: 10, step: 0.25 },
+  offset: { value: 1, min: -2, max: 2, step: 0.25 },
+  clip: false,
+  useMounted: true,
+  useOrthographic: false,
+  useResize: false,
+  isLinear: false,
+  enabled: true,
+  lookAtX: { value: 0, min: -20, max: 20, step: 0.10 },
+  lookAtY: { value: 0, min: -20, max: 20, step: 0.10 },
+  lookAtZ: { value: 0, min: -20, max: 20, step: 0.10 },
+  moveToX: { value: -5, min: -20, max: 20, step: 0.10 },
+  moveToY: { value: -5, min: -20, max: 20, step: 0.10 },
+  moveToZ: { value: 5, min: -20, max: 20, step: 0.10 },
+  upX: { value: 0, min: -1, max: 1, step: 0.10 },
+  upY: { value: -1, min: -1, max: 1, step: 0.10 },
+  upZ: { value: 0, min: -1, max: 1, step: 0.10 },
+})
+
+const { sin, cos, PI } = Math
+const positions = Array.from(
+  { length: 8 },
+  (_, i) => new Vector3(cos(i * PI / 4) * 4, sin(i * PI / 4) * 4, 0),
+)
+
+const easingFn = computed(() => c.isLinear.value.value ? (n: number) => n : undefined)
+
+const boundsRef = shallowRef()
+
+const startArg = shallowRef('')
+const cancelArg = shallowRef('')
+const endArg = shallowRef('')
+
+const startCount = shallowRef(0)
+const cancelCount = shallowRef(0)
+const endCount = shallowRef(0)
+
+const onStartFn = (v: any) => { startArg.value = v.object?.uuid; startCount.value++ }
+const onCancelFn = (v: any) => { cancelArg.value = v.object?.uuid; cancelCount.value++ }
+const onEndFn = (v: any) => { endArg.value = v.object?.uuid; endCount.value++ }
+</script>
+
+<template>
+  <TresLeches />
+  <OverlayInfo>
+    <h1>Bounds</h1>
+    <h2>Setup</h2>
+    <p>In this scene, multiple objects are children of <code>&lt;Bounds/&gt;</code>. A <code>pointerup</code> on a child should move/rotate the camera to fit the child into the view.</p>
+    <h2>lookAt(lookAt?, position?, up?)</h2>
+    <p><code>&lt;Bounds&gt;</code> has a <code>fit</code> method that can be called imperatively.</p>
+    <button
+      @pointerup="() => boundsRef.instance.lookAt(
+        new Vector3(c.lookAtX.value.value, c.lookAtY.value.value, c.lookAtZ.value.value),
+      )"
+    >
+      lookAt(new Vector(lookAtArgs))
+    </button><br />
+    <button
+      @pointerup="() => boundsRef.instance.lookAt(
+        [c.lookAtX.value.value, c.lookAtY.value.value, c.lookAtZ.value.value],
+      )"
+    >
+      lookAt([lookAtArgs])
+    </button><br />
+    <button
+      @pointerup="() => boundsRef.instance.lookAt(
+        [c.lookAtX.value.value, c.lookAtY.value.value, c.lookAtZ.value.value],
+        [c.moveToX.value.value, c.moveToY.value.value, c.moveToZ.value.value],
+      )"
+    >
+      lookAt([lookAtArgs], [moveToArgs])
+    </button><br />
+    <button
+      @pointerup="() => boundsRef.instance.lookAt(
+        undefined,
+        [c.moveToX.value.value, c.moveToY.value.value, c.moveToZ.value.value],
+      )"
+    >
+      lookAt(undefined, [moveToArgs])
+    </button><br />
+    <button
+      @pointerup="() => boundsRef.instance.lookAt(
+        undefined,
+        [c.moveToX.value.value, c.moveToY.value.value, c.moveToZ.value.value],
+        [c.upX.value.value, c.upY.value.value, c.upZ.value.value],
+      )"
+    >
+      lookAt(undefined, [moveToArgs], [upArgs])
+    </button><br />
+    <button @pointerup="() => boundsRef.instance.lookAt()">lookAt()</button><br />
+    <h2>Callback results</h2>
+    <p>onStart ({{ startCount }})</p>
+    {{ startArg }}
+    <hr />
+    <p>onCancel ({{ cancelCount }})</p>
+    {{ cancelArg }}
+    <hr />
+    <p>onEnd ({{ endCount }})</p>
+    {{ endArg }}
+    <h2>Testing Notes</h2>
+    <p>OrbitControls zoom using an Orthographic camera can result in parts of the scene appearing "cut off", independent of <code>&lt;Bounds/&gt;</code></p>
+    <p>Switching between Orthographic and Perspective Cameras leads to odd behavior, independent of <code>&lt;Bounds/&gt;</code>. To test, change <code>isOrthographicCamera</code>'s value, save and reload the page.</p>
+    <p>The <code>clip</code> option sets the camera's clipping to a large multiple of the internal <code>distance</code>. To test, change the component's coefficient to a smaller number.</p>
+  </OverlayInfo>
+  <TresCanvas render-mode="on-demand">
+    <TresOrthographicCamera v-if="c.useOrthographic.value.value" :position="[-5, 5, 5]" :zoom="1" :args="[-400, 400, 400, -400, 0, 10000]" />
+    <TresPerspectiveCamera v-else :position="[5, 5, 5]" />
+    <OrbitControls make-default />
+    <TresGroup>
+      <Bounds
+        v-if="c.enabled.value.value"
+        ref="boundsRef"
+        :clip="c.clip.value.value"
+        :duration="c.duration.value.value"
+        :offset="c.offset.value.value"
+        :use-resize="c.useResize.value.value"
+        :use-mounted="c.useMounted.value.value"
+        :easing="easingFn"
+        @start="onStartFn"
+        @cancel="onCancelFn"
+        @end="onEndFn"
+      >
+        <TresMesh
+          v-for="p, i of positions"
+          :key="i"
+          :position="p"
+          @pointer-up="(e) => boundsRef.instance.lookAt(e.object)"
+        >
+          <TresBoxGeometry />
+          <TresMeshNormalMaterial />
+        </TresMesh>
+      </Bounds>
+    </TresGroup>
+    <Grid :scale="20" :cell-size=".1" :section-size="0.3" section-color="#AAF" :infinite-grid="true" />
+  </TresCanvas>
+</template>

playground/vue/src/router/routes/staging.ts

@@ -44,6 +44,11 @@ export const stagingRoutes = [
     name: 'Ocean',
     component: () => import('../../pages/staging/OceanDemo.vue'),
   },
+  {
+    path: '/staging/bounds',
+    name: 'Bounds',
+    component: () => import('../../pages/staging/BoundsDemo.vue'),
+  },
   {
     path: '/staging/fit',
     name: 'Fit',