Another Math Question

#1 I wonder if you could do the reverse of this:

public static Vector2 ConvertScreenToWorld(Vector2 coordinates,Vector2 screenResolution)
        {
            // Credit to Joshua A. Thomas for this function :D
            // Get the Current Camera
            T2DSceneCamera currentCamera = (T2DSceneCamera)TorqueObjectDatabase.Instance.FindObject("Camera");
            // Figure out the relative Position
            Vector2 relativePosition = Vector2.Divide(coordinates,screenResolution);
            // Return the world position
            return Vector2.Multiply(relativePosition, currentCamera.Extent) + currentCamera.SceneMin;
        }

#2

[b]Viewport.Project()[/b]

Projects a 3D vector from object space into screen space. 

[b]Parameters[/b]

[i]source[/i]
    The vector to project.

[i]projection[/i]
    The projection matrix.

[i]view[/i]
    The view matrix.

[i]world[/i]
    The world matrix.

[b]Return Value[/b]
    The vector in screen space.

public Vector3 Project(Vector3 source, Matrix projection, Matrix view, Matrix world)
{
    Matrix matrix = Matrix.Multiply(Matrix.Multiply(world, view), projection);
    Vector3 vector = Vector3.Transform(source, matrix);
    float a = (((source.X * matrix.M14) + (source.Y * matrix.M24)) + (source.Z * matrix.M34)) + matrix.M44;
    if (!WithinEpsilon(a, 1f))
    {
        vector = (Vector3) (vector / a);
    }
    vector.X = (((vector.X + 1f) * 0.5f) * this.Width) + this.X;
    vector.Y = (((-vector.Y + 1f) * 0.5f) * this.Height) + this.Y;
    vector.Z = (vector.Z * (this.MaxDepth - this.MinDepth)) + this.MinDepth;
    return vector;
}

#3 Ahh, T3D, I thought it read T2D. You should slap that into the TDN Takuan, point conversion seems to be a common request.

#4 Thanks Takuan - I will ahve to check that out!