/// <summary>
/// Calculates the vector cross product
/// </summary>
/// <param name="c"></param>
/// <param name="thizArg"></param>
/// <param name="x"></param>
/// <returns>
/// The cross product of two 3D vectors.
/// </returns>
public JsValue VecCross(CpuBlock c, JsValue thizArg, JsValue[] x)
{
if (x.Length < 1)
{
throw new Exception("Invalid value");
}
var v1obj = ((ObjectInstance)thizArg);
var v2obj = ((ObjectInstance)x[0]);
Vector3 v1 = BlockUtils.ToVector3(v1obj);
Vector3 v2 = BlockUtils.ToVector3(v2obj);
return(BlockUtils.Vec2Obj(c, Vector3.Cross(v1, v2)));
}
/// <summary>
/// Multiply vector3 by scalar
/// </summary>
/// <param name="c"></param>
/// <param name="thizArg"></param>
/// <param name="x"></param>
/// <returns>
/// The result of a vector3 multiplied by scalar.
/// </returns>
public JsValue VecMul(CpuBlock c, JsValue thizArg, JsValue[] x)
{
if (x.Length < 1)
{
throw new Exception("Invalid value");
}
var vobj = ((ObjectInstance)thizArg);
float f;
if (!BlockUtils.TryGetFloat(x[0], out f))
{
throw new Exception("Invalid value");
}
Vector3 v = BlockUtils.ToVector3(vobj);
return(BlockUtils.Vec2Obj(c, v * f));
}
/// <summary>
/// Multiply quaternion with either another quaternion or a 3d vector.
/// </summary>
/// <returns>
/// Vector if second argument is vector and quaternion if second argument is quaternion
/// </returns>
public JsValue QuatMult(CpuBlock c, JsValue thizArg, JsValue[] x)
{
if (x.Length < 1)
{
throw new Exception("Invalid value");
}
var q1obj = ((ObjectInstance)thizArg);
var q2obj = ((ObjectInstance)x[0]);
var q1 = BlockUtils.ToQuat(q1obj);
if (q2obj.HasProperty("w"))
{
var q2 = BlockUtils.ToQuat(q2obj);
return(BlockUtils.Quat2Obj(c, q1 * q2));
}
else
{
var v = BlockUtils.ToVector3(q2obj);
return(BlockUtils.Vec2Obj(c, q1 * v));
}
}