42 lines
1.8 KiB
JavaScript
42 lines
1.8 KiB
JavaScript
import { Mesh, InstancedInterleavedBuffer, InterleavedBufferAttribute, Vector3, Vector4 } from "three";
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import { LineSegmentsGeometry } from "./LineSegmentsGeometry.js";
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import { LineMaterial } from "./LineMaterial.js";
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const _start = /* @__PURE__ */ new Vector3();
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const _end = /* @__PURE__ */ new Vector3();
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const _viewport = /* @__PURE__ */ new Vector4();
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class Wireframe extends Mesh {
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constructor(geometry = new LineSegmentsGeometry(), material = new LineMaterial({ color: Math.random() * 16777215 })) {
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super(geometry, material);
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this.isWireframe = true;
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this.type = "Wireframe";
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}
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// for backwards-compatibility, but could be a method of LineSegmentsGeometry...
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computeLineDistances() {
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const geometry = this.geometry;
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const instanceStart = geometry.attributes.instanceStart;
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const instanceEnd = geometry.attributes.instanceEnd;
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const lineDistances = new Float32Array(2 * instanceStart.count);
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for (let i = 0, j = 0, l = instanceStart.count; i < l; i++, j += 2) {
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_start.fromBufferAttribute(instanceStart, i);
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_end.fromBufferAttribute(instanceEnd, i);
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lineDistances[j] = j === 0 ? 0 : lineDistances[j - 1];
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lineDistances[j + 1] = lineDistances[j] + _start.distanceTo(_end);
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}
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const instanceDistanceBuffer = new InstancedInterleavedBuffer(lineDistances, 2, 1);
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geometry.setAttribute("instanceDistanceStart", new InterleavedBufferAttribute(instanceDistanceBuffer, 1, 0));
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geometry.setAttribute("instanceDistanceEnd", new InterleavedBufferAttribute(instanceDistanceBuffer, 1, 1));
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return this;
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}
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onBeforeRender(renderer) {
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const uniforms = this.material.uniforms;
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if (uniforms && uniforms.resolution) {
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renderer.getViewport(_viewport);
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this.material.uniforms.resolution.value.set(_viewport.z, _viewport.w);
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}
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}
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}
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export {
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Wireframe
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};
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//# sourceMappingURL=Wireframe.js.map
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