// ---------------------------------------------------------------------------------------
// Light shafts shaders with shadows and noise support
// Inpirated on the ATI paper http://ati.amd.com/developer/gdc/mitchell_lightshafts.pdf
// Ogre3D implementation by Xavier Verguín González (xavyiy [at] gmail [dot] com) [Xavyiy]
// ---------------------------------------------------------------------------------------

// --------------------- Light shafts material ------------------------

vertex_program LightShafts/VP/HLSL hlsl
{
	source lightshaft/lightshaftvp.glsl
  target vs_2_a

  default_params
  {
    param_named_auto uWorld world_matrix
    param_named_auto uWorldViewProj worldviewproj_matrix
  }
}

vertex_program LightShafts/VP/GL glsl glsles glslang
{
	source lightshaft/lightshaftvp.glsl
	default_params
  {
    param_named_auto uWorld world_matrix
    param_named_auto uWorldViewProj worldviewproj_matrix
  }
}

fragment_program LightShafts/FP/HLSL hlsl
{
	source lightshaft/lightshaftfp.glsl
  target ps_2_a

  default_params
  {
    param_named_auto Time time
  }
}

fragment_program LightShafts/FP/GL glsl glsles
{
	source lightshaft/lightshaftfp.glsl
	default_params
  {
    param_named_auto Time time
    param_named uDepthMap int 0
		param_named uCookieMap int 1
		param_named uNoiseMap int 2
  }
}

fragment_program LightShafts/FP/GLSLang glslang
{
	source lightshaft/lightshaftfp.glsl
	default_params
  {
    param_named_auto Time time
  }
}

vertex_program LightShafts/VP unified
{
	delegate LightShafts/VP/HLSL
	delegate LightShafts/VP/GL
}

fragment_program LightShafts/FP unified
{
	delegate LightShafts/FP/HLSL
  delegate LightShafts/FP/GLSLang
	delegate LightShafts/FP/GL
}

material SO3/LightShafts
{
	technique
	{
	  scheme SO3/LIGHTSHAFT
		pass
		{
			lighting off
			depth_write off
			depth_check on
			scene_blend add
      transparent_sorting off
			vertex_program_ref LightShafts/VP 
			{
			}

			fragment_program_ref LightShafts/FP
			{
        param_named uAttenuation float4 1000.0 0.02 0.02 0.02
        param_named uLightPosition float3 0 0 0
        param_named uLightColor float4 1 1 1 1
        // Light camera/frustum (near+far) clip distance
        param_named uLightFarClipDistance float 48
        param_named_auto Time time
			}

      // Depth map, must be fill by code
			texture_unit
			{
        tex_address_mode clamp
        tex_coord_set 0
        texture lightshaft/Cookie0.png
			}
             
      // Projector cookie
			texture_unit
			{
        tex_address_mode clamp
        texture lightshaft/Cookie0.png
			}

      // Noise texture
			texture_unit
			{
        tex_address_mode wrap
        texture lightshaft/Noise.png
			}
		}
	}
}

material SO3/LightShaftsRect
{
	technique
	{
	  scheme SO3/LIGHTSHAFT
		pass
		{
			lighting off
			depth_write off
			depth_check on
			scene_blend add
      transparent_sorting off
			vertex_program_ref LightShafts/VP 
			{
			}

			fragment_program_ref LightShafts/FP
			{
        param_named uAttenuation float4 1000.0 0.02 0.02 0.02
        param_named uLightPosition float3 0 0 0
        param_named uLightColor float4 1 1 1 1
        // Light camera/frustum (near+far) clip distance
        param_named uLightFarClipDistance float 48
        param_named_auto Time time
			}

      // Depth map, must be fill by code
			texture_unit
			{
        tex_address_mode clamp
        tex_coord_set 0
        texture lightshaft/Cookie0.png
			}
             
      // Projector cookie
			texture_unit
			{
        tex_address_mode clamp
        texture lightshaft/Cookie1.png
			}

      // Noise texture
			texture_unit
			{
        tex_address_mode wrap
        texture lightshaft/Noise.png
			}
		}
	}
}

// --------------------- Depth material ------------------------

vertex_program LightShaftsDepth/VP/HLSL hlsl
{
	source lightshaft/lightshaftdepthvp.glsl
  target vs_2_a
  
  default_params
  {
    param_named_auto uWorld world_matrix
    param_named_auto uWorldViewProj worldviewproj_matrix
  }
}

vertex_program LightShaftsDepth/VP/GL glsl glsles glslang
{
	source lightshaft/lightshaftdepthvp.glsl
	default_params
  {
    param_named_auto uWorld world_matrix
    param_named_auto uWorldViewProj worldviewproj_matrix
  }
}

fragment_program LightShaftsDepth/FP/HLSL hlsl
{
	source lightshaft/lightshaftdepthfp.glsl
  target ps_2_a
}

fragment_program LightShaftsDepth/FP/GL glsl glsles glslang
{
	source lightshaft/lightshaftdepthfp.glsl
}

vertex_program LightShaftsDepth/VP unified
{
	delegate LightShaftsDepth/VP/HLSL
	delegate LightShaftsDepth/VP/GL
}

fragment_program LightShaftsDepth/FP unified
{
	delegate LightShaftsDepth/FP/HLSL
	delegate LightShaftsDepth/FP/GL
}

material SO3/LightShaftsDepth
{
	technique
	{
	  scheme SO3/LIGHTSHAFT
		pass
		{
			lighting off 

			vertex_program_ref LightShaftsDepth/VP 
			{
			}

			fragment_program_ref LightShaftsDepth/FP
			{
			    param_named uLightPosition float3 0 50 0
			    // Light camera/frustum (near+far) clip distance
			    param_named uLightFarClipDistance float 48
			}
		}
	}
}