source: OGRE/trunk/ogrenew/Samples/Media/DeferredShadingMedia/DeferredShading/post/hlsl/LightMaterial_vs.hlsl @ 692

Revision 692, 2.6 KB checked in by mattausch, 19 years ago (diff)

adding ogre 1.2 and dependencies

Line 
1/******************************************************************************
2Copyright (c) W.J. van der Laan
3
4Permission is hereby granted, free of charge, to any person obtaining a copy of
5this software  and associated documentation files (the "Software"), to deal in
6the Software without restriction, including without limitation the rights to use,
7copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
8Software, and to permit persons to whom the Software is furnished to do so, subject
9to the following conditions:
10
11The above copyright notice and this permission notice shall be included in all copies
12or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
15INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
16PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
17HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
18OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE
19SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20******************************************************************************/
21/** Deferred shading framework
22        // W.J. :wumpus: van der Laan 2005 //
23       
24        Post shader: Light geometry material
25*/
26struct VS_OUTPUT {
27   float4 pos: POSITION;
28   float2 texCoord: TEXCOORD0;
29   float3 projCoord: TEXCOORD1;
30};
31
32uniform float vpWidth, vpHeight;
33uniform float4x4 worldViewProj;
34uniform float4x4 invProj;
35
36VS_OUTPUT main(
37        float4 Pos: POSITION
38){
39   VS_OUTPUT Out;
40   
41   float4 projPos = mul(worldViewProj, Pos);
42   projPos = projPos/projPos.w;
43   //projPos[2] = 0;
44
45   // projPos is now in nonhomogeneous 2d space -- this makes sure no perspective interpolation is
46   // done that could mess with our concept.
47   Out.pos = projPos;
48   
49   //float3 position = mul(invProj, float4(projCoord, 0, 1))*distance;
50   // Acquire view space position via inverse projection transformation
51   // Optimisation for perspective, symmetric view frustrums
52   // These interpolate over the frustrum plane for w=1
53   Out.projCoord = float3(projPos[0], projPos[1], 1)*float3(
54                invProj[0][0], // X vector component from X
55                invProj[1][1], // Y vector component from Y
56                invProj[2][3]  // Z vector component from W
57   );
58   
59   // Texture coordinate magic, this compensates for jitter
60   float2 texCoord = float2(projPos[0]/2+0.5, -projPos[1]/2+0.5);
61   float2 texSize = float2(vpWidth, vpHeight);
62   texCoord = floor(texCoord * texSize)/texSize;
63   Out.texCoord = texCoord;
64   
65
66   return Out;
67}
68
69
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