private Color ComputeLight(Color finalColor, Vector3 hitPosition, Vector3 hitNormal, PotatoPointLight light)
{
Vector3 directionToLight = light.GetDirection(hitPosition);
if (light.InRange(hitPosition))
{
double normalAng = DiffuseAngle(hitPosition, hitNormal, light);
if (normalAng > 0)
{
finalColor = Color.FromArgb((int)Math.Round((light.Color.R + finalColor.R) * 0.5f * normalAng * light.Intensity),
(int)Math.Round((light.Color.G + finalColor.G) * 0.5f * normalAng * light.Intensity),
(int)Math.Round((light.Color.B + finalColor.B) * 0.5f * normalAng * light.Intensity));
}
else
{
finalColor = Color.Black;
}
}
return(finalColor);
}
public static double DiffuseAngle(Vector3 hitPoint, Vector3 normal, PotatoPointLight light)
{
Vector3 dir = Vector3.Normalize(light.Position - hitPoint);
return(Vector3.Dot(dir, normal));
}
public static float DiffuseAngle(Vector3 hitPoint, Vector3 normal, PotatoPointLight light)
{
Vector3 dir = Vector3.Normalize(Vector3.Subtract(light.Position, hitPoint));
return(Vector3.Dot(dir, normal));
}