vertex_program glow_vs cg
{
        source vs_glow.cg
        entry_point main
        profiles vs_1_1 arbvp1
}

fragment_program glow_ps cg
{
        source ps_glow.cg
        entry_point main
        profiles ps_2_0 arbfp1  
}

material glow
{
        technique
        {
                pass
                {
                        scene_blend alpha_blend
                        depth_check on
                        lighting off

                        //what color should the glow be, emissive light can be changed through ogre as well
                        emissive 0.5 0.9 1.0 0.0
                        
                        vertex_program_ref glow_vs
                        {
                                //don't worry about auto parameters here, they are given
                                param_named_auto iWorldTMatrix inverse_transpose_world_matrix
                                param_named_auto iViewMatrix inverse_view_matrix
                                param_named_auto worldMatrix   world_matrix
                                param_named_auto viewProjMatrix viewproj_matrix

                                //how much should the glow expand from the model, usually a small value
                                param_named inflate float 0.1
                        }
                        
                        fragment_program_ref glow_ps
                        {
                                //base alpha value of glow
                                param_named alphaValue float 0.6

                                //from which view to surface normal angle on should the intensity of the glow decrease
                                param_named cutoffAngle float 65.0

                                //by which exponent should the intensity decrease
                                param_named exponent float 3.0

                                //how fast should the light pulsate
                                param_named_auto time time_0_x 50

                                //don't worry about this one, it makes sure we use the emissive color value
                                param_named_auto color surface_emissive_colour
                        }
                }
                
        }
}

material glow/drone
{
        technique
        {
                pass
                {
                        scene_blend alpha_blend
                        depth_check on
                        lighting off

                        texture_unit
                        {
                                texture drone.png
                        }
                }
                pass
                {
                        scene_blend alpha_blend
                        depth_check on
                        lighting off
                        emissive 0.5 0.2 0.1 0.0

                        vertex_program_ref glow_vs
                        {
                                param_named_auto iWorldTMatrix inverse_transpose_world_matrix
                                param_named_auto iViewMatrix inverse_view_matrix
                                param_named_auto worldMatrix   world_matrix
                                param_named_auto viewProjMatrix viewproj_matrix
                                param_named inflate float 0.2
                        }
                        
                        fragment_program_ref glow_ps
                        {
                                param_named alphaValue float 0.4
                                param_named cutoffAngle float 70.0
                                param_named exponent float 2.5
                                param_named_auto time time_0_x 50
                                param_named_auto color surface_emissive_colour
                        }
                }
                
        }
}