XNA 多光源镜面反射
每盏灯都可以有镜面反射，最多支持三盏灯，再多就不能使用ps2_0，附上HLSL代码和执行文件，自己玩吧^_^
1
float4x4 World;
2float4x4 View;
3float4x4 Projection;
4float4x4 WorldViewProjection;
5float3 EyePosition;
6
7#define MaxLights 3
8
9float3 LightDirs[MaxLights];
10float4 LightColors[MaxLights];
11int LightCount;
12
13float4 AmbientColor = float4(0.05,0.05,0.05,1);
14float SpecularPower = 16;
15
16texture Texture;
17sampler TextureSampler = sampler_state
18
{
19
Texture = (Texture);
20 AddressU = Wrap;
21 AddressV = Wrap;
22 AddressW = Wrap;
23 MinFilter = Linear;
24 MagFilter = Linear;
25 MipFilter = Linear;
26
};
27
28struct VertexShaderInput
29{
30 float4 pos : POSITION0;
31 float2 texCoord : TEXCOORD0;
32 float3 normal : NORMAL;
33 float3 tangent : TANGENT;
34};
35
36struct VertexShaderOutput
37{
38 float4 pos : POSITION0;
39 float2 texCoord : TEXCOORD0;
40 float3 normal : TEXCOORD1;
41 float3 view : TEXCOORD2;
42};
43
44VertexShaderOutput VertexShaderFunction(VertexShaderInput input)
45{
46 VertexShaderOutput output;
47
48 WorldViewProjection = mul(mul(World, View), Projection);
49 output.pos = mul(input.pos, WorldViewProjection);
50 output.texCoord = input.texCoord;
51 output.normal = mul(input.normal, (float3x3)World);
52 output.view = EyePosition - mul(input.pos, World);
53
54 return output;
55}
56
57float4 PixelShaderFunction(VertexShaderOutput input) : COLOR0
58{
59 float4 diffuseSum = 0;
60 float4 specularSum = 0;
61 for(int i = 0; i < LightCount; i++)
62
{
63 float3 L = normalize(-LightDirs[i]);
64 float3 N = normalize(input.normal);
65 float3 R = normalize(reflect(LightDirs[i], N));
66 float3 V = normalize(input.view);
67
68 diffuseSum += saturate(dot(N, L)) * LightColors[i];
69 specularSum += pow(saturate(dot(R, V)), SpecularPower);
70
}
71
72 float4 textureColor = tex2D(TextureSampler, input.texCoord);
73
74 float4 final = AmbientColor + textureColor * diffuseSum + specularSum;
75
76 return final;
77}
78
79technique Technique1
80{
81 pass Pass1
82 {
83 VertexShader = compile vs_2_0 VertexShaderFunction();
84 PixelShader = compile ps_2_0 PixelShaderFunction();
85 }
86}
87
float4x4 World;2
float4x4 View;3
float4x4 Projection;4
float4x4 WorldViewProjection;5
float3 EyePosition;6
7
#define MaxLights 38
9
float3 LightDirs[MaxLights];10
float4 LightColors[MaxLights];11
int LightCount;12
13
float4 AmbientColor = float4(0.05,0.05,0.05,1);14
float SpecularPower = 16;15
16
texture Texture;17
sampler TextureSampler = sampler_state18
{
19
Texture = (Texture);20
AddressU = Wrap;21
AddressV = Wrap;22
AddressW = Wrap;23
MinFilter = Linear;24
MagFilter = Linear;25
MipFilter = Linear;26
};27
28
struct VertexShaderInput29
{30
float4 pos : POSITION0;31
float2 texCoord : TEXCOORD0;32
float3 normal : NORMAL;33
float3 tangent : TANGENT;34
};35
36
struct VertexShaderOutput37
{38
float4 pos : POSITION0;39
float2 texCoord : TEXCOORD0;40
float3 normal : TEXCOORD1;41
float3 view : TEXCOORD2;42
};43
44
VertexShaderOutput VertexShaderFunction(VertexShaderInput input)45
{46
VertexShaderOutput output;47
48
WorldViewProjection = mul(mul(World, View), Projection);49
output.pos = mul(input.pos, WorldViewProjection);50
output.texCoord = input.texCoord;51
output.normal = mul(input.normal, (float3x3)World);52
output.view = EyePosition - mul(input.pos, World);53
54
return output;55
}56
57
float4 PixelShaderFunction(VertexShaderOutput input) : COLOR058
{59
float4 diffuseSum = 0;60
float4 specularSum = 0;61
for(int i = 0; i < LightCount; i++)62
{
63
float3 L = normalize(-LightDirs[i]);64
float3 N = normalize(input.normal);65
float3 R = normalize(reflect(LightDirs[i], N));66
float3 V = normalize(input.view);67
68
diffuseSum += saturate(dot(N, L)) * LightColors[i];69
specularSum += pow(saturate(dot(R, V)), SpecularPower);70
}71
72
float4 textureColor = tex2D(TextureSampler, input.texCoord);73
74
float4 final = AmbientColor + textureColor * diffuseSum + specularSum;75
76
return final;77
}78
79
technique Technique180
{81
pass Pass182
{83
VertexShader = compile vs_2_0 VertexShaderFunction();84
PixelShader = compile ps_2_0 PixelShaderFunction();85
}86
}87
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作者：gogoplayer
E-mail : gogoplayer@163.com
QQ : 78939328
posted on 2008-11-13 16:09 gogoplayer 阅读(1855) 评论(6) 编辑 收藏 举报
