Volumetric Fog

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

float4x4 matViewProjection;
    struct VS_INPUT
    {
           float4 Position : POSITION0;
    };
    struct VS_OUTPUT
    {
           float4 Position : POSITION0;
           float frontDepth:TEXCOORD0;
    };
    VS_OUTPUT vs_main( VS_INPUT Input )
    {
          VS_OUTPUT Output;
          Output.Position = mul( matViewProjection, Input.Position );
          Output.frontDepth=Output.Position.z/800;
          return( Output );
    }

1
2
3
4

float4 ps_main(float frontDepth:TEXCOORD0) : COLOR0
{
          return frontDepth;
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

technique Default_DirectX_Effect
{
          pass Front
          {
               ALPHABLENDENABLE = TRUE;
               BLENDOP = ADD;
               CULLMODE = CW; //Обход по часовой 
               DESTBLEND = ONE;
               SRCBLEND = ONE;
               ZENABLE = FALSE; 
               ZWRITEENABLE = FALSE;
               VertexShader = compile vs_2_0 vs_front();
               PixelShader = compile ps_2_0 ps_front();
          }
          pass Back 
          { 
               ALPHABLENDENABLE = TRUE;
               BLENDOP = ADD;
               CULLMODE = CCW; //Обход против часовой 
               DESTBLEND = ONE;
               SRCBLEND = ONE;
               ZENABLE = FALSE; 
               ZWRITEENABLE = FALSE;
               VertexShader = compile vs_2_0 vs_back();
               PixelShader = compile ps_2_0 ps_back();
          } 
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

float4x4 matViewProjection;
struct VS_INPUT
{
          float4 Position : POSITION0;
};
struct VS_OUTPUT
{
          float4 Position : POSITION0;
          float2 tex:TEXCOORD0;
};
VS_OUTPUT vs_main( VS_INPUT Input )
{
          VS_OUTPUT Output;
          Output.Position = Input.Position;
          Output.tex.x= 0.5*(1+Output.Position.x);
          Output.tex.y=0.5*(1-Output.Position.y);
          return( Output );
}

1
2
3
4
5
6
7
8

sampler Texture0;
sampler Texture1;
float4 ps_main(float2 tex:TEXCOORD0) : COLOR0
{
          float4 front=tex2D(Texture0,tex);
          float4 back=tex2D(Texture1,tex);
          return(front-back)*10; //(10-коэффициент туманности)
}