| … | |
… | |
| 10 | }; |
10 | }; |
| 11 | |
11 | |
| 12 | struct pixelOut { |
12 | struct pixelOut { |
| 13 | float4 col : COLOR; |
13 | float4 col : COLOR; |
| 14 | }; |
14 | }; |
|
|
15 | |
| 15 | // pixel shader |
16 | // pixel shader |
| 16 | pixelOut main(vertexOut IN, // input from vertex shade |
17 | pixelOut main(vertexOut IN // input from vertex shade |
| 17 | uniform float SpecExpon, // constant parameters fro |
18 | //uniform float SpecExpon, // constant parameters fro |
| 18 | uniform float4 AmbiColor, // application |
19 | //uniform float4 AmbiColor, // application |
| 19 | uniform float4 SurfColor, |
20 | //uniform float4 SurfColor, |
| 20 | uniform float4 LightColor |
21 | //uniform float4 LightColor |
| 21 | ) |
22 | ) |
| 22 | { |
23 | { |
|
|
24 | float SpecExpon = 100; |
|
|
25 | float4 AmbiColor = { 0.5, 0, 0, 1 }; |
|
|
26 | float4 SurfColor = { 0, 0.5, 0, 1 }; |
|
|
27 | float4 LightColor = { 1, 1, 1, 1 }; |
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|
28 | |
| 23 | pixelOut OUT; // output of the pixel shader |
29 | pixelOut OUT; // output of the pixel shader |
| 24 | float3 Ln = normalize(IN.LightVec); |
30 | float3 Ln = normalize(IN.LightVec); |
| 25 | float3 Nn = normalize(IN.WorldNormal); |
31 | float3 Nn = normalize(IN.WorldNormal); |
| 26 | float3 Vn = normalize(IN.WorldView); |
32 | float3 Vn = normalize(IN.WorldView); |
| 27 | float3 Hn = normalize(Vn + |
33 | float3 Hn = normalize(Vn + Ln); |
| 28 | // scalar product between light and normal vectors: |
34 | // scalar product between light and normal vectors: |
| 29 | float ldn = dot(Ln,Nn); |
35 | float ldn = dot(Ln,Nn); |
| 30 | // scalar product between halfway and normal vectors: |
36 | // scalar product between halfway and normal vectors: |
| 31 | float hdn = dot(Hn,Nn); |
37 | float hdn = dot(Hn,Nn); |
| 32 | // specialized "lit" function computes weights for |
38 | // specialized "lit" function computes weights for |
| 33 | // diffuse and specular parts: |
39 | // diffuse and specular parts: |
| 34 | float4 litV = lit(ldn,hdn,SpecExpon); |
40 | float4 litV = lit(ldn,hdn,SpecExpon); |
| 35 | float4 diffContrib = |
41 | OUT.col = litV.x * AmbiColor + litV.y * SurfColor + litV.z * LightColor; |
|
|
42 | return OUT; |
| 36 | SurfColor * ( litV.y * LightColor + AmbiColor); |
43 | float4 diffContrib = SurfColor * ( litV.y * LightColor + AmbiColor); |
| 37 | float4 specContrib = litV.y*litV.z * LightColor; |
44 | float4 specContrib = litV.y*litV.z * LightColor; |
| 38 | // sum of diffuse and specular contributions: |
45 | // sum of diffuse and specular contributions: |
| 39 | float4 result = diffContrib + specContrib; |
46 | float4 result = diffContrib + specContrib; |
| 40 | OUT.col = result; |
47 | OUT.col = result + AmbiColor; |
| 41 | return OUT; // output of pixel shader |
48 | return OUT; // output of pixel shader |
| 42 | } |
49 | } |
| 43 | |
50 | |
