0a5f6a8047
- Go backend (server/)
- Frontend (web/, server/static/)
- Database and deployment files
- Scripts and docs
Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
/**
|
|
* @description 扩展方法，提供 gl-matrix 为提供的方法
|
|
* */
|
|
import { mat3, vec2 } from 'gl-matrix';
|
|
export function leftTranslate(out, a, v) {
|
|
var transMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
|
|
mat3.fromTranslation(transMat, v);
|
|
return mat3.multiply(out, transMat, a);
|
|
}
|
|
export function leftRotate(out, a, rad) {
|
|
var rotateMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
|
|
mat3.fromRotation(rotateMat, rad);
|
|
return mat3.multiply(out, rotateMat, a);
|
|
}
|
|
export function leftScale(out, a, v) {
|
|
var scaleMat = [0, 0, 0, 0, 0, 0, 0, 0, 0];
|
|
mat3.fromScaling(scaleMat, v);
|
|
return mat3.multiply(out, scaleMat, a);
|
|
}
|
|
function leftMultiply(out, a, a1) {
|
|
return mat3.multiply(out, a1, a);
|
|
}
|
|
/**
|
|
* 根据 actions 来做 transform
|
|
* @param m
|
|
* @param actions
|
|
*/
|
|
export function transform(m, actions) {
|
|
var matrix = m ? [].concat(m) : [1, 0, 0, 0, 1, 0, 0, 0, 1];
|
|
for (var i = 0, len = actions.length; i < len; i++) {
|
|
var action = actions[i];
|
|
switch (action[0]) {
|
|
case 't':
|
|
leftTranslate(matrix, matrix, [action[1], action[2]]);
|
|
break;
|
|
case 's':
|
|
leftScale(matrix, matrix, [action[1], action[2]]);
|
|
break;
|
|
case 'r':
|
|
leftRotate(matrix, matrix, action[1]);
|
|
break;
|
|
case 'm':
|
|
leftMultiply(matrix, matrix, action[1]);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return matrix;
|
|
}
|
|
/**
|
|
* 向量 v1 到 向量 v2 夹角的方向
|
|
* @param {Array} v1 向量
|
|
* @param {Array} v2 向量
|
|
* @return {Boolean} >= 0 顺时针 < 0 逆时针
|
|
*/
|
|
export function direction(v1, v2) {
|
|
return v1[0] * v2[1] - v2[0] * v1[1];
|
|
}
|
|
/**
|
|
* 二维向量 v1 到 v2 的夹角
|
|
* @param v1
|
|
* @param v2
|
|
* @param direct
|
|
*/
|
|
export function angleTo(v1, v2, direct) {
|
|
var ang = vec2.angle(v1, v2);
|
|
var angleLargeThanPI = direction(v1, v2) >= 0;
|
|
if (direct) {
|
|
if (angleLargeThanPI) {
|
|
return Math.PI * 2 - ang;
|
|
}
|
|
return ang;
|
|
}
|
|
if (angleLargeThanPI) {
|
|
return ang;
|
|
}
|
|
return Math.PI * 2 - ang;
|
|
}
|
|
/**
|
|
* 计算二维向量的垂直向量
|
|
* @param out
|
|
* @param v
|
|
* @param flag
|
|
*/
|
|
export function vertical(out, v, flag) {
|
|
if (flag) {
|
|
out[0] = v[1];
|
|
out[1] = -1 * v[0];
|
|
}
|
|
else {
|
|
out[0] = -1 * v[1];
|
|
out[1] = v[0];
|
|
}
|
|
return out;
|
|
}
|
|
//# sourceMappingURL=ext.js.map
|