/
TresCanvas.vue
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/
TresCanvas.vue
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<script setup lang="ts">
import { PerspectiveCamera, Scene } from 'three'
import type {
WebGLRendererParameters,
ColorSpace,
ShadowMapType,
ToneMapping,
} from 'three'
import type { Ref,
App } from 'vue'
import {
computed,
onMounted,
provide,
ref,
shallowRef,
watch,
watchEffect,
Fragment,
defineComponent,
h,
getCurrentInstance,
} from 'vue'
import pkg from '../../package.json'
import {
useTresContextProvider,
useLogger,
usePointerEventHandler,
useRenderLoop,
type TresContext,
} from '../composables'
import { extend } from '../core/catalogue'
import { render } from '../core/renderer'
import type { RendererPresetsType } from '../composables/useRenderer/const'
import type { TresCamera, TresObject } from '../types/'
import { registerTresDevtools } from '../devtools'
export interface TresCanvasProps
extends Omit<WebGLRendererParameters, 'canvas'> {
// required by for useRenderer
shadows?: boolean
clearColor?: string
toneMapping?: ToneMapping
shadowMapType?: ShadowMapType
useLegacyLights?: boolean
outputColorSpace?: ColorSpace
toneMappingExposure?: number
// required by useTresContextProvider
camera?: TresCamera
preset?: RendererPresetsType
windowSize?: boolean
useWindowPointer?: boolean
disableRender?: boolean
}
const props = withDefaults(defineProps<TresCanvasProps>(), {
alpha: undefined,
depth: undefined,
shadows: undefined,
stencil: undefined,
antialias: undefined,
windowSize: undefined,
useWindowPointer: undefined,
disableRender: undefined,
useLegacyLights: undefined,
preserveDrawingBuffer: undefined,
logarithmicDepthBuffer: undefined,
failIfMajorPerformanceCaveat: undefined,
})
const { logWarning } = useLogger()
const canvas = ref<HTMLCanvasElement>()
/*
`scene` is defined here and not in `useTresContextProvider` because the custom
renderer uses it to mount the app nodes. This happens before `useTresContextProvider` is called.
The custom renderer requires `scene` to be editable (not readonly).
*/
const scene = shallowRef(new Scene())
const { resume } = useRenderLoop()
const slots = defineSlots<{
default(): any
}>()
const instance = getCurrentInstance()?.appContext.app
const createInternalComponent = (context: TresContext) =>
defineComponent({
setup() {
const ctx = getCurrentInstance()?.appContext
if (ctx) ctx.app = instance as App
provide('useTres', context)
provide('extend', extend)
if (typeof window !== 'undefined') {
registerTresDevtools(ctx.app, context)
}
return () => h(Fragment, null, slots?.default ? slots.default() : [])
},
})
const mountCustomRenderer = (context: TresContext) => {
const InternalComponent = createInternalComponent(context)
render(h(InternalComponent), scene.value as unknown as TresObject)
}
const dispose = (context: TresContext, force = false) => {
scene.value.children = []
if (force) {
context.renderer.value.dispose()
context.renderer.value.renderLists.dispose()
context.renderer.value.forceContextLoss()
}
mountCustomRenderer(context)
resume()
}
const disableRender = computed(() => props.disableRender)
const context = shallowRef<TresContext | null>(null)
defineExpose({ context, dispose: () => dispose(context.value as TresContext, true) })
onMounted(() => {
const existingCanvas = canvas as Ref<HTMLCanvasElement>
context.value = useTresContextProvider({
scene: scene.value,
canvas: existingCanvas,
windowSize: props.windowSize,
disableRender,
rendererOptions: props,
})
usePointerEventHandler({ scene: scene.value, contextParts: context.value, isWindow: props.useWindowPointer })
const { registerCamera, camera, cameras, deregisterCamera } = context.value
mountCustomRenderer(context.value)
const addDefaultCamera = () => {
const camera = new PerspectiveCamera(
45,
window.innerWidth / window.innerHeight,
0.1,
1000,
)
camera.position.set(3, 3, 3)
camera.lookAt(0, 0, 0)
registerCamera(camera)
const unwatch = watchEffect(() => {
if (cameras.value.length >= 2) {
camera.removeFromParent()
deregisterCamera(camera)
unwatch?.()
}
})
}
watch(
() => props.camera,
(newCamera, oldCamera) => {
if (newCamera) registerCamera(newCamera)
if (oldCamera) {
oldCamera.removeFromParent()
deregisterCamera(oldCamera)
}
},
{
immediate: true,
},
)
if (!camera.value) {
logWarning(
'No camera found. Creating a default perspective camera. '
+ 'To have full control over a camera, please add one to the scene.',
)
addDefaultCamera()
}
if (import.meta.hot && context.value)
import.meta.hot.on('vite:afterUpdate', () => dispose(context.value as TresContext))
})
</script>
<template>
<canvas
ref="canvas"
:data-scene="scene.uuid"
:class="$attrs.class"
:data-tres="`tresjs ${pkg.version}`"
:style="{
display: 'block',
width: '100%',
height: '100%',
position: windowSize ? 'fixed' : 'relative',
top: 0,
left: 0,
pointerEvents: 'auto',
touchAction: 'none',
...$attrs.style as Object,
}"
/>
</template>