void CalculateDirectionalLight(Vertex_VCN *pVertices, int num_vertices, Vector4 &light_direction, Vector4 &light_color)
{
for ( int i=0; i<num_vertices; i++ )
{
Vector4 normal = g_world_matrix.RotateVector(pVertices[i].m_Normal);
Vector4 intensity = VectorDot(normal, light_direction);
intensity.Abs();
pVertices[i].m_Color = intensity * light_color;
}
}
void CalculatePointLight(Vertex_VCN *pVertices, int num_vertices, Vector4 &light_position, Vector4 &light_color)
{
for ( int i=0; i<num_vertices; i++ )
{
Vector4 position = pVertices[i].m_Position * g_world_matrix;
Vector4 vertex_to_light = light_position - position;
vertex_to_light.Normalize();
Vector4 normal = g_world_matrix.RotateVector(pVertices[i].m_Normal);
Vector4 intensity = VectorDot(normal, vertex_to_light);
intensity.Abs();
pVertices[i].m_Color = intensity * light_color;
}
}