snapsvg/demos/snap-ad/src/js/vendor/fss/Vector4.js

JavaScript Vector Library

/**
 * @object Vector4
 * @author Matthew Wagerfield
 */
FSS.Vector4 = {
  create: function(x, y, z, w) {
    var vector = new FSS.Array(4);
    this.set(vector, x, y, z);
    return vector;
  },
  set: function(target, x, y, z, w) {
    target[0] = x || 0;
    target[1] = y || 0;
    target[2] = z || 0;
    target[3] = w || 0;
    return this;
  },
  setX: function(target, x) {
    target[0] = x || 0;
    return this;
  },
  setY: function(target, y) {
    target[1] = y || 0;
    return this;
  },
  setZ: function(target, z) {
    target[2] = z || 0;
    return this;
  },
  setW: function(target, w) {
    target[3] = w || 0;
    return this;
  },
  add: function(target, a) {
    target[0] += a[0];
    target[1] += a[1];
    target[2] += a[2];
    target[3] += a[3];
    return this;
  },
  multiplyVectors: function(target, a, b) {
    target[0] = a[0] * b[0];
    target[1] = a[1] * b[1];
    target[2] = a[2] * b[2];
    target[3] = a[3] * b[3];
    return this;
  },
  multiplyScalar: function(target, s) {
    target[0] *= s;
    target[1] *= s;
    target[2] *= s;
    target[3] *= s;
    return this;
  },
  min: function(target, value) {
    if (target[0] < value) { target[0] = value; }
    if (target[1] < value) { target[1] = value; }
    if (target[2] < value) { target[2] = value; }
    if (target[3] < value) { target[3] = value; }
    return this;
  },
  max: function(target, value) {
    if (target[0] > value) { target[0] = value; }
    if (target[1] > value) { target[1] = value; }
    if (target[2] > value) { target[2] = value; }
    if (target[3] > value) { target[3] = value; }
    return this;
  },
  clamp: function(target, min, max) {
    this.min(target, min);
    this.max(target, max);
    return this;
  }
};