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render_dx9.cpp
Package: chap03.rar　[view]
Upload User: gzqinmao
Upload Date: 2022-07-13
Package Size: 472k
Code Size: 3k
Category:

OpenGL program

Development Platform:

Visual C++

render_dx9.cpp：Code Content
  1. #include "Gut.h"
  2. #include "render_data.h"
  4. static LPDIRECT3DVERTEXSHADER9 g_pVertexShaderDX9 = NULL;
  5. static LPDIRECT3DPIXELSHADER9  g_pPixelShaderDX9 = NULL;
  7. static Matrix4x4 g_proj_matrix;
  9. bool InitResourceDX9(void)
  10. {
  11. // 获得Direct3D 9设备
  12. LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
  13. // 载入Vertex Shader
  14. g_pVertexShaderDX9 = GutLoadVertexShaderDX9_HLSL("../../shaders/vertex_color.shader", "VS", "vs_1_1");
  15. if ( g_pVertexShaderDX9==NULL )
  16. return false;
  17. // 载入Pixel Shader
  18. g_pPixelShaderDX9 = GutLoadPixelShaderDX9_HLSL("../../shaders/vertex_color.shader", "PS", "ps_2_0");
  19. if ( g_pPixelShaderDX9==NULL )
  20. return false;
  21. // 计算投影转换矩阵
  22. g_proj_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, 1.0f, 0.1f, 100.0f);
  23. // 关闭光照
  24. device->SetRenderState(D3DRS_LIGHTING, FALSE);
  25. // 改变三角形正面的法线
  26. device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
  28. return true;
  29. }
  31. bool ReleaseResourceDX9(void)
  32. {
  33. SAFE_RELEASE(g_pVertexShaderDX9);
  34. SAFE_RELEASE(g_pPixelShaderDX9);
  36. return true;
  37. }
  39. void ResizeWindowDX9(int width, int height)
  40. {
  41. // 获得Direct3D 9设备
  42. LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
  44. GutResetGraphicsDeviceDX9();
  46. // 投影矩阵, 重设水平和垂直方向的视角.
  47. float aspect = (float) height / (float) width;
  48. g_proj_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, aspect, 0.1f, 100.0f);
  49. // 关闭光照
  50. device->SetRenderState(D3DRS_LIGHTING, FALSE);
  51. // 改变三角形正面的法线
  52. device->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
  53. }
  55. // `使用Direct3D9来绘图`
  56. void RenderFrameDX9(void)
  57. {
  58. LPDIRECT3DDEVICE9 device = GutGetGraphicsDeviceDX9();
  59. // `清除画面`
  60. device->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_ARGB(0, 0, 0, 0), 1.0f, 0);
  61. // `开始下绘图指令`
  62. device->BeginScene(); 
  63. // `计算出一个可以转换到镜头坐标系的矩阵`
  64. Matrix4x4 view_matrix = GutMatrixLookAtRH(g_eye, g_lookat, g_up);
  65. Matrix4x4 view_proj_matrix = view_matrix * g_proj_matrix;
  66. Matrix4x4 world_view_proj_matrix;
  67. // `设置数据格式`
  68. // `D3DFVF_XYZ = 使用3个浮点数来记录位置`
  69. // `D3DFVF_DIFFUSE = 使用32bits整数类型来记录BGRA颜色`
  70. device->SetFVF(D3DFVF_XYZ|D3DFVF_DIFFUSE); 
  71. // `设置Shader`
  72. device->SetVertexShader(g_pVertexShaderDX9);
  73. device->SetPixelShader(g_pPixelShaderDX9);
  74. // `太阳`
  75. world_view_proj_matrix = g_sun_matrix * view_proj_matrix;
  76. device->SetVertexShaderConstantF(0, (const float *)&world_view_proj_matrix, 4);
  77. device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pSunVertices, sizeof(Vertex_VC) );
  78. // `地球`
  79. world_view_proj_matrix = g_earth_matrix * view_proj_matrix;
  80. device->SetVertexShaderConstantF(0, (const float *)&world_view_proj_matrix, 4);
  81. device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pEarthVertices, sizeof(Vertex_VC) );
  82. // `月亮`
  83. world_view_proj_matrix = g_moon_matrix * view_proj_matrix;
  84. device->SetVertexShaderConstantF(0, (const float *)&world_view_proj_matrix, 4);
  85. device->DrawIndexedPrimitiveUP(D3DPT_TRIANGLELIST, 0, g_iNumSphereVertices, g_iNumSphereTriangles, g_pSphereIndices, D3DFMT_INDEX16, g_pMoonVertices, sizeof(Vertex_VC) );
  86. // `声明所有的绘图指令都下完了`
  87. device->EndScene(); 
  88. // `把背景backbuffer的画面显示出来`
  89.     device->Present( NULL, NULL, NULL, NULL );
  90. }