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vgl-geometry.js
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vgl-geometry.js
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import { BufferGeometry, BufferAttribute } from 'three';
import { name, floatArray } from '../types';
import { validateName, validateFloatArray } from '../validators';
import { parseArray } from '../parsers';
/**
* This is the base mixin component for all geometry components,
* corresponding [THREE.Geometry](https://threejs.org/docs/index.html#api/core/Geometry).
* This can also be used directly for building custom geometries.
*/
export default {
inject: {
vglNamespace: {
default() { throw new Error('VueGL components must be wraped by VglNamespace component.'); },
},
},
props: {
/** Name of the component. */
name: { type: name, required: true, validator: validateName },
/** The x, y, and z coordinates of each vertex in this geometry. */
positionAttribute: { type: floatArray, validator: validateFloatArray },
/** The red, green, and blue channels of vertex color of each vertex in this geometry. */
colorAttribute: { type: floatArray, validator: validateFloatArray },
/** The x, y, and z components of the vertex normal vector of each vertex in this geometry. */
normalAttribute: { type: floatArray, validator: validateFloatArray },
},
computed: {
/** The THREE.BufferGeometry instance. */
inst: () => new BufferGeometry(),
},
methods: {
/**
* Emit an event in `geometries` namespace. Call this method after editing instance's
* properties.
*/
update() {
if (this.name !== undefined) this.vglNamespace.geometries.emit(this.name, this.inst);
},
},
beforeDestroy() {
if (this.name !== undefined) this.vglNamespace.geometries.delete(this.name, this.inst);
this.inst.dispose();
},
watch: {
inst: {
handler(inst, oldInst) {
if (this.positionAttribute) {
const positionAttribute = oldInst
? oldInst.getAttribute('position')
: new BufferAttribute(new Float32Array(parseArray(this.positionAttribute)), 3);
inst.setAttribute('position', positionAttribute);
}
if (this.colorAttribute) {
const colorAttribute = oldInst
? oldInst.getAttribute('color')
: new BufferAttribute(new Float32Array(parseArray(this.colorAttribute)), 3);
inst.setAttribute('color', colorAttribute);
}
if (this.normalAttribute) {
const normalAttribute = oldInst
? oldInst.getAttribute('normal')
: new BufferAttribute(new Float32Array(parseArray(this.normalAttribute)), 3);
inst.setAttribute('normal', normalAttribute);
}
if (oldInst) oldInst.dispose();
this.vglNamespace.geometries.set(this.name, inst);
},
immediate: true,
},
name(newName, oldName) {
if (oldName !== undefined) this.vglNamespace.geometries.delete(oldName, this.inst);
if (newName !== undefined) this.vglNamespace.geometries.set(newName, this.inst);
},
positionAttribute(positionAttribute) {
const positionArray = parseArray(positionAttribute);
let attributeObject = this.inst.getAttribute('position');
if (attributeObject.array.length === positionArray.length) {
attributeObject.copyArray(positionArray);
} else {
/* itemSize / array length is different from previous..
recreate new Buffer and restore version */
const previousVersion = attributeObject.version;
attributeObject = new BufferAttribute(new Float32Array(positionArray), 3);
attributeObject.version = previousVersion;
this.inst.setAttribute('position', attributeObject);
}
attributeObject.needsUpdate = true;
this.update();
},
colorAttribute(colorAttribute) {
const colorArray = parseArray(colorAttribute);
let attributeObject = this.inst.getAttribute('color');
if (attributeObject.array.length === colorArray.length) {
attributeObject.copyArray(colorArray);
} else {
/* itemSize / array length is different from previous..
recreate new Buffer and restore version */
const previousVersion = attributeObject.version;
attributeObject = new BufferAttribute(new Float32Array(colorArray), 3);
attributeObject.version = previousVersion;
this.inst.setAttribute('color', attributeObject);
}
attributeObject.needsUpdate = true;
this.update();
},
normalAttribute(normalAttribute) {
const normalArray = parseArray(normalAttribute);
let attributeObject = this.inst.getAttribute('normal');
if (attributeObject.array.length === normalArray.length) {
attributeObject.copyArray(normalArray);
} else {
/* itemSize / array length is different from previous..
recreate new Buffer and restore version */
const previousVersion = attributeObject.version;
attributeObject = new BufferAttribute(new Float32Array(normalArray), 3);
attributeObject.version = previousVersion;
this.inst.setAttribute('normal', attributeObject);
}
attributeObject.needsUpdate = true;
this.update();
},
},
render(h) {
if (!this.$slots.default) return undefined;
return h('div', { style: { display: 'none' } }, this.$slots.default);
},
};