How to use @antv/gl-matrix - 5 common examples
To help you get started, we’ve selected a few @antv/gl-matrix examples, based on popular ways it is used in public projects.
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antvis / util / packages / matrix-util / src / vec2.ts View on Github 
vec2.angle = function (v1, v2) {
const theta = vec2.dot(v1, v2) / (vec2.length(v1) * vec2.length(v2));
return Math.acos(clamp(theta, -1, 1));
};vec2.angleTo = function (v1: number, v2: number, direct: boolean): number {
const angle = vec2.angle(v1, v2);
const angleLargeThanPI = vec2.direction(v1, v2) >= 0;
if (direct) {
if (angleLargeThanPI) {
return Math.PI * 2 - angle;
}
return angle;
}
if (angleLargeThanPI) {
return angle;
}
return Math.PI * 2 - angle;
};vec2.angle = function (v1, v2) {
const theta = vec2.dot(v1, v2) / (vec2.length(v1) * vec2.length(v2));
return Math.acos(clamp(theta, -1, 1));
};
/**
* 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
*/
vec2.direction = function (v1: number[], v2: number[]): number {
return v1[0] * v2[1] - v2[0] * v1[1];
};
vec2.angleTo = function (v1: number, v2: number, direct: boolean): number {
const angle = vec2.angle(v1, v2);
const angleLargeThanPI = vec2.direction(v1, v2) >= 0;
if (direct) {
if (angleLargeThanPI) {
return Math.PI * 2 - angle;
}
return angle;
}
if (angleLargeThanPI) {
return angle;
}
return Math.PI * 2 - angle;
};vec2.angleTo = function (v1: number, v2: number, direct: boolean): number {
const angle = vec2.angle(v1, v2);
const angleLargeThanPI = vec2.direction(v1, v2) >= 0;
if (direct) {
if (angleLargeThanPI) {
return Math.PI * 2 - angle;
}
return angle;
}
if (angleLargeThanPI) {
return angle;
}
return Math.PI * 2 - angle;
};const angleLargeThanPI = vec2.direction(v1, v2) >= 0;
if (direct) {
if (angleLargeThanPI) {
return Math.PI * 2 - angle;
}
return angle;
}
if (angleLargeThanPI) {
return angle;
}
return Math.PI * 2 - angle;
};
vec2.vertical = function (out: number[], v: number[], flag: boolean): number[] {
if (flag) {
out[0] = v[1];
out[1] = -1 * v[0];
} else {
out[0] = -1 * v[1];
out[1] = v[0];
}
return out;
};
export default vec2;@antv/gl-matrix
Javascript Matrix and Vector library for High Performance WebGL apps
