applyMatrix4 method
Implementation
Vector4 applyMatrix4(Matrix4 m) {
var x = this.x, y = this.y, z = this.z, w = this.w;
var e = m.elements;
this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;
this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;
this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;
this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;
return this;
}