public Vertex(Vector4 position, Vector4 normal, ScreenPosition screenPos, float wc, Vector2F textureCoordinates, Vector4 tangent, Vector4 biNormal)
{
Position = position;
Normal = normal;
ScreenPos = screenPos;
Wc = wc;
TextureCoordinates = textureCoordinates;
Tangent = tangent;
BiNormal = biNormal;
}
public void CalculateAfterClipping()
{
Wc = Homogenous.W;
float xNDC = Homogenous.X / Wc;
float yNDC = Homogenous.Y / Wc;
float zNDC = Homogenous.Z / Wc;
float xs = (xNDC + 1) * Width / 2;
float ys = (1 - yNDC) * Height / 2;
float zs = (zNDC + 1) / 2;
ScreenPos = new ScreenPosition((int)xs, (int)ys, zs);
}
public Vector2F CalculateScreenCoordinates(Matrix cameraMatrix)
{
var h**o = cameraMatrix * Position;
h**o.Z = -h**o.Z;
Homogenous = h**o;
Wc = h**o.W;
float xNDC = h**o.X / Wc;
float yNDC = h**o.Y / Wc;
float zNDC = h**o.Z / Wc;
float xs = (xNDC + 1) * Width / 2;
float ys = (1 - yNDC) * Height / 2;
float zs = (zNDC + 1) / 2;
ScreenPos = new ScreenPosition((int)xs, (int)ys, zs);
return(new Vector2F(xNDC, yNDC));
}
