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How to use the @antv/gl-matrix/lib/gl-matrix/vec2.angle function in @antv/gl-matrix

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antvis / util / packages / matrix-util / src / vec2.ts View on Github

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;
};