@antv/f2
Version:
Charts for mobile visualization.
25 lines • 600 B
JavaScript
/**
* expand Vec2
*/
import { vec2 } from 'gl-matrix';
var vec2Direction = function vec2Direction(v1, v2) {
return v1[0] * v2[1] - v2[0] * v1[1];
};
var vec2Zero = function vec2Zero(v) {
return v[0] === 0 && v[1] === 0;
};
var vec2AngleTo = function vec2AngleTo(v1, v2, direction) {
var angle = vec2.angle(v1, v2);
var angleLargeThanPI = vec2Direction(v1, v2) >= 0;
if (direction) {
if (angleLargeThanPI) {
return Math.PI * 2 - angle;
}
return angle;
}
if (angleLargeThanPI) {
return angle;
}
return Math.PI * 2 - angle;
};
export { vec2Zero, vec2AngleTo };