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https://gitee.com/ruanwujing/green-pack-cocos
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67 lines
2.1 KiB
TypeScript
67 lines
2.1 KiB
TypeScript
import { _decorator, Component, Mat4, Sprite, v3 } from 'cc';
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const { ccclass, property } = _decorator;
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// dynamicAtlasManager.enabled = false;
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@ccclass('TestBilliards')
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export class TestBilliards extends Component {
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@property
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public scrollAxis = v3(1, 0, 0)
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private matrix = new Mat4();
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private mat = [
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1, 0, 0,
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0, 1, 0,
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0, 0, 1]
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@property
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public scrollSpeed = 0;
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start() {
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}
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scroll(rad, x, y, z) {
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// 矩阵旋转
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// 传入的是逆矩阵，所以计算反向旋转
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// 因为只需要计算3d旋转，所以用3x3矩阵表示
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const s = Math.sin(-rad);
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const c = Math.cos(-rad);
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const t = 1 - c;
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let a = this.mat;
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const a00 = a[0]; const a01 = a[1]; const a02 = a[2];
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const a10 = a[3]; const a11 = a[4]; const a12 = a[5];
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const a20 = a[6]; const a21 = a[7]; const a22 = a[8];
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const b00 = x * x * t + c; const b01 = y * x * t + z * s; const b02 = z * x * t - y * s;
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const b10 = x * y * t - z * s; const b11 = y * y * t + c; const b12 = z * y * t + x * s;
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const b20 = x * z * t + y * s; const b21 = y * z * t - x * s; const b22 = z * z * t + c;
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a[0] = a00 * b00 + a10 * b01 + a20 * b02;
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a[1] = a01 * b00 + a11 * b01 + a21 * b02;
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a[2] = a02 * b00 + a12 * b01 + a22 * b02;
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a[3] = a00 * b10 + a10 * b11 + a20 * b12;
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a[4] = a01 * b10 + a11 * b11 + a21 * b12;
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a[5] = a02 * b10 + a12 * b11 + a22 * b12;
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a[6] = a00 * b20 + a10 * b21 + a20 * b22;
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a[7] = a01 * b20 + a11 * b21 + a21 * b22;
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a[8] = a02 * b20 + a12 * b21 + a22 * b22;
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}
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update(dt) {
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let rad = dt * this.scrollSpeed;
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this.scroll(rad, this.scrollAxis.x, this.scrollAxis.y, this.scrollAxis.z);
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let a = this.mat
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this.matrix.set(
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a[0], a[1], a[2], 0,
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a[3], a[4], a[5], 0,
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a[6], a[7], a[8], 0,
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0, 0, 0, 0,)
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this.getComponent(Sprite).material.setProperty("b_matrix", this.matrix)
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}
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}
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