1 | /****************************************************************************** |
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2 | Copyright (c) W.J. van der Laan |
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3 | |
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4 | Permission is hereby granted, free of charge, to any person obtaining a copy of |
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5 | this software and associated documentation files (the "Software"), to deal in |
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6 | the Software without restriction, including without limitation the rights to use, |
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7 | copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the |
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8 | Software, and to permit persons to whom the Software is furnished to do so, subject |
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9 | to the following conditions: |
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10 | |
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11 | The above copyright notice and this permission notice shall be included in all copies |
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12 | or substantial portions of the Software. |
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13 | |
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14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
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15 | INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A |
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16 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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17 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
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18 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE |
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19 | SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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20 | ******************************************************************************/ |
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21 | /** Deferred shading framework |
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22 | // W.J. :wumpus: van der Laan 2005 // |
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23 | |
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24 | Post shader: Generic fullscreen quad |
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25 | */ |
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26 | struct VS_OUTPUT { |
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27 | float4 Pos: POSITION; |
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28 | float2 texCoord: TEXCOORD0; |
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29 | float3 projCoord: TEXCOORD1; |
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30 | }; |
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31 | float4x4 invProj; |
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32 | |
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33 | VS_OUTPUT main(float4 Pos: POSITION){ |
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34 | VS_OUTPUT Out; |
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35 | |
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36 | // Clean up inaccuracies |
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37 | Pos.xy = sign(Pos.xy); |
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38 | |
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39 | Out.Pos = float4(Pos.xy, 0, 1); |
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40 | |
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41 | // Image-space |
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42 | Out.texCoord.x = 0.5 * (1 + Pos.x); |
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43 | Out.texCoord.y = 0.5 * (1 - Pos.y); |
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44 | |
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45 | // Projection coordinates |
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46 | // Inverted projection matrix |
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47 | // These interpolate over the frustrum plane for w=1 |
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48 | Out.projCoord = float3(Pos.x, Pos.y, 1) * |
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49 | float3( |
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50 | invProj[0][0], // X vector component from X |
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51 | invProj[1][1], // Y vector component from Y |
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52 | invProj[2][3] // Z vector component from W |
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53 | ); |
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54 | |
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55 | return Out; |
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56 | } |
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57 | |
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58 | |
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59 | |
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