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Text File  |  2004-09-27  |  1.6 KB  |  71 lines
  1. //-----------------------------------------------------------------------------
  2. // File: SkyBox.fx
  3. //
  4. // Desc: 
  5. // 
  6. // Copyright (c) Microsoft Corporation. All rights reserved.
  7. //-----------------------------------------------------------------------------
  8.  
  9.  
  10. //-----------------------------------------------------------------------------
  11. // Global variables
  12. //-----------------------------------------------------------------------------
  13. float4x4 g_mInvWorldViewProjection;
  14. float g_fAlpha;
  15. float g_fScale;
  16.  
  17. texture g_EnvironmentTexture;
  18.  
  19. sampler EnvironmentSampler = sampler_state
  20. { 
  21.     Texture = (g_EnvironmentTexture);
  22.     MipFilter = LINEAR;
  23.     MinFilter = LINEAR;
  24.     MagFilter = POINT;
  25. };
  26.  
  27.  
  28. //-----------------------------------------------------------------------------
  29. // Skybox stuff
  30. //-----------------------------------------------------------------------------
  31. struct SkyboxVS_Input
  32. {
  33.     float4 Pos : POSITION;
  34. };
  35.  
  36. struct SkyboxVS_Output
  37. {
  38.     float4 Pos : POSITION;
  39.     float3 Tex : TEXCOORD0;
  40. };
  41.  
  42. SkyboxVS_Output SkyboxVS( SkyboxVS_Input Input )
  43. {
  44.     SkyboxVS_Output Output;
  45.     
  46.     Output.Pos = Input.Pos;
  47.     Output.Tex = normalize( mul(Input.Pos, g_mInvWorldViewProjection) );
  48.     
  49.     return Output;
  50. }
  51.  
  52. float4 SkyboxPS( SkyboxVS_Output Input ) : COLOR
  53. {
  54.     float4 color = texCUBE( EnvironmentSampler, Input.Tex )*g_fScale;
  55.     color.a = g_fAlpha;
  56.     return color;
  57. }
  58.  
  59. technique Skybox
  60. {
  61.     pass p0
  62.     {
  63.         VertexShader = compile vs_2_0 SkyboxVS();
  64.         PixelShader = compile ps_2_0 SkyboxPS();
  65.     }
  66. }
  67.  
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  71.