source: OGRE/trunk/ogrenew/Samples/Media/materials/programs/Grass.cg @ 692

Revision 692, 872 bytes checked in by mattausch, 19 years ago (diff)

adding ogre 1.2 and dependencies

Line 
1// Vertex program to wave some grass about
2// Simplistic, assumes base of the grass at 0
3void grass_vp(float4 position : POSITION,
4                          float3 normal   : NORMAL,
5                          float2 uv               : TEXCOORD0,
6                          out float4 oPosition : POSITION,
7                          out float2 oUv           : TEXCOORD0,
8                          out float4 colour    : COLOR,
9
10                          uniform float4x4 worldViewProj,
11                          uniform float4 ambient,
12                          uniform float4 objSpaceLight,
13                          uniform float4 lightColour,
14                          uniform float4 offset)
15{
16        float4 mypos = position;
17        //offset = float4(0.5, 0, 0, 0);
18        mypos = mypos + offset * mypos.yyyy;
19        oPosition = mul(worldViewProj, mypos);
20
21        oUv = uv;
22        // get vertex light direction (support directional and point)
23        float3 light = normalize(
24                objSpaceLight.xyz -  (position.xyz * objSpaceLight.w));
25        float diffuseFactor = max(dot(normal, light), 0);
26       
27       
28        colour = ambient + diffuseFactor * lightColour;
29}
30
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