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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// part of the Irrlicht Engine Shader example.
// These simple Direct3D9 pixel and vertex shaders will be loaded by the shaders
// example. Please note that these example shaders don't do anything really useful.
// They only demonstrate that shaders can be used in Irrlicht.
//-----------------------------------------------------------------------------
// Global variables
//-----------------------------------------------------------------------------
float4x4 mWorldViewProj; // World * View * Projection transformation
float4x4 mInvWorld; // Inverted world matrix
float4x4 mTransWorld; // Transposed world matrix
float3 mLightPos; // Light position
float4 mLightColor; // Light color
// Vertex shader output structure
struct VS_OUTPUT
{
float4 Position : POSITION; // vertex position
float4 Diffuse : COLOR0; // vertex diffuse color
float2 TexCoord : TEXCOORD0; // tex coords
};
VS_OUTPUT vertexMain(in float4 vPosition : POSITION,
in float3 vNormal : NORMAL,
float2 texCoord : TEXCOORD0 )
{
VS_OUTPUT Output;
// transform position to clip space
Output.Position = mul(vPosition, mWorldViewProj);
// transform normal
float3 normal = mul(float4(vNormal,0.0), mInvWorld);
// renormalize normal
normal = normalize(normal);
// position in world coodinates
float3 worldpos = mul(mTransWorld, vPosition);
// calculate light vector, vtxpos - lightpos
float3 lightVector = worldpos - mLightPos;
// normalize light vector
lightVector = normalize(lightVector);
// calculate light color
float3 tmp = dot(-lightVector, normal);
tmp = lit(tmp.x, tmp.y, 1.0);
tmp = mLightColor * tmp.y;
Output.Diffuse = float4(tmp.x, tmp.y, tmp.z, 0);
Output.TexCoord = texCoord;
return Output;
}
// Pixel shader output structure
struct PS_OUTPUT
{
float4 RGBColor : COLOR0; // Pixel color
};
sampler2D myTexture;
PS_OUTPUT pixelMain(float2 TexCoord : TEXCOORD0,
float4 Position : POSITION,
float4 Diffuse : COLOR0 )
{
PS_OUTPUT Output;
float4 col = tex2D( myTexture, TexCoord ); // sample color map
// multiply with diffuse and do other senseless operations
Output.RGBColor = Diffuse * col;
Output.RGBColor *= 4.0;
return Output;
}
|
