//
//This file is part of Caelum.
//See http://www.ogre3d.org/wiki/index.php/Caelum 
//
//Copyright (c) 2006-2007 Caelum team. See Contributors.txt for details.
//
//Caelum is free software: you can redistribute it and/or modify
//it under the terms of the GNU Lesser General Public License as published
//by the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//Caelum is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Lesser General Public License for more details.
//
//You should have received a copy of the GNU Lesser General Public License
//along with Caelum. If not, see <http://www.gnu.org/licenses/>.
//

vertex_program CaelumSample/PSSM/ShadowCasterVP cg
{
    source CaelumSample.cg
    profiles vs_1_1 arbvp1
    entry_point PssmShadowCasterVP

    default_params
    {
        param_named_auto wvpMat worldviewproj_matrix
    }
}

fragment_program CaelumSample/PSSM/ShadowCasterFP cg
{
    source CaelumSample.cg
    profiles ps_2_0 arbfp1
    entry_point PssmShadowCasterFP

    default_params
    {
    }
}

// All this will do is write depth and depth˛ to red and green
material CaelumSample/PSSM/ShadowCaster
{
    technique
    {
        pass
        {
            // See: http://www.ogre3d.org/phpBB2/viewtopic.php?t=44817
            fog_override true
            
            vertex_program_ref CaelumSample/PSSM/ShadowCasterVP
            {
            }

            fragment_program_ref CaelumSample/PSSM/ShadowCasterFP
            {
            }
        }
    }
}

vertex_program CaelumSample/BasicVP cg
{
    source CaelumSample.cg
    entry_point MainVP
    profiles vs_2_0 arbvp1
    compile_arguments -posinv -DAMBIENT=1 -DTWO_LIGHTS=1

    default_params
    {
        param_named_auto worldviewproj_matrix worldviewproj_matrix
        param_named_auto inverse_transpose_worldview_matrix inverse_transpose_worldview_matrix
    }
}

fragment_program CaelumSample/BasicFP cg
{
    source CaelumSample.cg
    entry_point MainFP
    profiles ps_2_x arbfp1
    compile_arguments -DAMBIENT=1 -DTWO_LIGHTS=1
    
    default_params
    {
        param_named_auto derived_scene_colour derived_scene_colour
        param_named_auto light_position_view_space_0 light_position_view_space 0
        param_named_auto light_position_view_space_1 light_position_view_space 1
        param_named_auto derived_light_diffuse_colour_0 derived_light_diffuse_colour 0
        param_named_auto derived_light_diffuse_colour_1 derived_light_diffuse_colour 1
    }
}

fragment_program CaelumSample/BasicFP/Terrain cg
{
    source CaelumSample.cg
    entry_point MainFP
    profiles ps_2_x arbfp1
    compile_arguments -DTERRAIN=1 -DAMBIENT=1 -DTWO_LIGHTS=1
    
    default_params
    {
        param_named_auto derived_scene_colour derived_scene_colour
        param_named_auto light_position_view_space_0 light_position_view_space 0
        param_named_auto light_position_view_space_1 light_position_view_space 1
        param_named_auto derived_light_diffuse_colour_0 derived_light_diffuse_colour 0
        param_named_auto derived_light_diffuse_colour_1 derived_light_diffuse_colour 1
    }
}

vertex_program CaelumSample/PSSM/AmbientVP cg
{
    source CaelumSample.cg
    profiles vs_1_1 arbvp1
    entry_point MainVP
    compile_arguments -DPSSM=0 -DAMBIENT=1

    default_params
    {
        param_named_auto worldviewproj_matrix worldviewproj_matrix
    }
}

fragment_program CaelumSample/PSSM/AmbientFP cg
{
    source CaelumSample.cg
    profiles ps_2_x arbfp1
    entry_point MainFP
    compile_arguments -DPSSM=0 -DAMBIENT=1

    default_params
    {
        param_named_auto derived_scene_colour derived_scene_colour
    }
}

fragment_program CaelumSample/PSSM/AmbientFP/Terrain cg
{
    source CaelumSample.cg
    profiles ps_2_x arbfp1
    entry_point MainFP
    compile_arguments -DPSSM=0 -DAMBIENT=1 -DTERRAIN=1

    default_params
    {
        param_named_auto derived_scene_colour derived_scene_colour
    }
}

vertex_program CaelumSample/PSSM/OneLightVP cg
{
    source CaelumSample.cg
    profiles vs_1_1 arbvp1
    entry_point MainVP
    compile_arguments -DPSSM=1 -DONE_LIGHT=1

    default_params
    {
        param_named_auto worldviewproj_matrix worldviewproj_matrix
        param_named_auto inverse_transpose_worldview_matrix inverse_transpose_worldview_matrix

        param_named_auto texWorldViewProjMatrix0 texture_worldviewproj_matrix 0
        param_named_auto texWorldViewProjMatrix1 texture_worldviewproj_matrix 1
        param_named_auto texWorldViewProjMatrix2 texture_worldviewproj_matrix 2
    }
}

fragment_program CaelumSample/PSSM/OneLightFP cg
{
    source CaelumSample.cg
    profiles ps_2_x arbfp1
    entry_point MainFP
    compile_arguments -DPSSM=1 -DONE_LIGHT=1

    default_params
    {
        param_named_auto invShadowMapSize0 inverse_texture_size 0
        param_named_auto invShadowMapSize1 inverse_texture_size 1
        param_named_auto invShadowMapSize2 inverse_texture_size 2

        param_named_auto light_position_view_space light_position_view_space 0
        param_named_auto derived_light_diffuse_colour derived_light_diffuse_colour 0
    }
}

fragment_program CaelumSample/PSSM/OneLightFP/Terrain cg
{
    source CaelumSample.cg
    profiles ps_2_x arbfp1
    entry_point MainFP
    compile_arguments -DPSSM=1 -DONE_LIGHT=1 -DTERRAIN

    default_params
    {
        param_named_auto invShadowMapSize0 inverse_texture_size 0
        param_named_auto invShadowMapSize1 inverse_texture_size 1
        param_named_auto invShadowMapSize2 inverse_texture_size 2

        param_named_auto light_position_view_space light_position_view_space 0
        param_named_auto derived_light_diffuse_colour derived_light_diffuse_colour 0
    }
}

material CaelumSample/Base
{
    technique Default
    {
        scheme Default

        pass Main
        {
            ambient 1 1 1
            diffuse 1 1 1
            fog_override true none
            
            vertex_program_ref CaelumSample/BasicVP
            {
            }

            fragment_program_ref CaelumSample/BasicFP
            {
            }

            texture_unit Main
            {
                texture TudorHouse.jpg
                tex_coord_set 0
            }
        }
    }

    technique PSSM
    {
        scheme PSSM

        pass Ambient
        {
            illumination_stage ambient
            ambient 1 1 1
            diffuse 0 0 0
            fog_override true none

            vertex_program_ref CaelumSample/PSSM/AmbientVP
            {
            }

            fragment_program_ref CaelumSample/PSSM/AmbientFP
            {
            }

            texture_unit Main
            {
                tex_coord_set 0
            }
        }

        pass Directional
        {
            illumination_stage per_light
            max_lights 2
            iteration once_per_light directional
            scene_blend add

            ambient 0 0 0
            diffuse 1 1 1
            fog_override true none

            vertex_program_ref CaelumSample/PSSM/OneLightVP
            {
            }

            fragment_program_ref CaelumSample/PSSM/OneLightFP
            {
            }

            texture_unit shadow_tex0
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 0
            }

            texture_unit shadow_tex1
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 1
            }

            texture_unit shadow_tex2
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 2
            }

            texture_unit Main
            {
                tex_coord_set 3
            }
        }
    }
}

material Examples/TudorHouse: CaelumSample/Base
{
    set_texture_alias Main TudorHouse.jpg
}

// Terrain material is special
material CaelumSample/Terrain: CaelumSample/Base
{
    technique Default
    {
        pass Main
        {
            fragment_program_ref CaelumSample/BasicFP/Terrain
            {
            }

            texture_unit Main
            {
                texture terrain_dirt-grass.jpg
                tex_coord_set 0
            }

            texture_unit TerrainDetail
            {
                texture terrain_detail.jpg
                tex_coord_set 1
            }
        }
    }

    technique PSSM
    {
        pass Ambient
        {
            fragment_program_ref CaelumSample/PSSM/AmbientFP/Terrain
            {
            }

            texture_unit Main
            {
                texture terrain_dirt-grass.jpg
                tex_coord_set 0
            }

            texture_unit TerrainDetail
            {
                texture terrain_detail.jpg
                tex_coord_set 1
            }
        }

        pass Directional
        {
            fragment_program_ref CaelumSample/PSSM/OneLightFP/Terrain
            {
            }

            texture_unit shadow_tex0
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 0
            }

            texture_unit shadow_tex1
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 1
            }

            texture_unit shadow_tex2
            {
                content_type shadow
                tex_address_mode clamp
                tex_coord_set 2
            }


            texture_unit Main
            {
                texture terrain_dirt-grass.jpg
                tex_coord_set 3
            }

            texture_unit TerrainDetail
            {
                texture terrain_detail.jpg
                tex_coord_set 4
            }
        }
    }
}