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2009 Graphics : project 1 based on DX9 basics

note. 2009 Graphics : project 1 based on DX9 basics. Documented by Dongjoon Kim SNU CS Ph.D Course Student Contact : dojo@cglab.snu.ac.kr. REQUIREMENTS. Requirements for Project1 based on DX9. 1. 3D Space Transformation (Closed in Projection Space) 2. Camera Control in WS

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2009 Graphics : project 1 based on DX9 basics

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  1. note 2009 Graphics : project 1 based on DX9 basics . Documented by Dongjoon Kim SNU CS Ph.D Course Student Contact : dojo@cglab.snu.ac.kr

  2. REQUIREMENTS

  3. Requirements for Project1 based on DX9 • 1. 3D Space Transformation (Closed in Projection Space) • 2. Camera Control in WS • 3. Shader model 3.0 (HLSL) • 4. Render To Texture and Its Texture Mapping ( Read-back Techniques ) • 5. Phong-based Illumination REQUIREMENTS

  4. 3D SPACE TRANSFORMATION

  5. Projective Space • Space and Transformation Matrix • 1. Transformation in Projection Space(3D) can be defined by 4x4 matrix • 2. DX API defines row major matrix and vector. • - mat1~3 = mat1*mat2*mat3 3D SPACE TRANSFORMATION Affine Space x1 y1 z1 p1 x2 y2 z2 p2 x3 y3 z3 p3 t1 t2 t3 1 Linear Transform Rigid Space Linear Space Projection Shear Scale Translation Rotation Translation Perspective TR

  6. Transformation : 3D Space Definition for the Scene 3D SPACE TRANSFORMATION Object Space World Space Viewing Space Projection Space Window Space

  7. Transformation : 3D Space Definition for the Scene 3D SPACE TRANSFORMATION z • Object Designer's Space • Coordinate system and unit are defined by the Designer Object Space World Space x Viewing Space Projection Space y Window Space

  8. Transformation : 3D Space Definition for the Scene 3D SPACE TRANSFORMATION • Scene Stage • Objects and Camera(Eye) and Light resources Object Space World Space Viewing Space Projection Space Window Space

  9. Transformation : 3D Space Definition for the Scene ( D3DX ) 3D SPACE TRANSFORMATION Object Space Viewing Space World Space World Space Viewing Space Projection Space • Camera(Eye)-Origin Coordinate System • Unit is same as WS's one • Use 'D3DXMatrixLookAtLH(…)’ Window Space

  10. Transformation : 3D Space Definition for the Scene ( D3DX ) 3D SPACE TRANSFORMATION Viewing Space Object Space World Space view frustum Projection Space Viewing Space (1, 1, 1) z Normalized view frustum Projection Space (-1, -1, 0) • Normalized Viewing Space • Clipping and Depth Test • Use 'D3DXMatrixPerspectiveLH(…)' or Orthogonal Window Space

  11. Transformation : 3D Space Definition for the Scene ( D3DX ) 3D SPACE TRANSFORMATION Object Space Normalized view frustum World Space X MinZ Projection Space x (pix) Y Window Space MaxZ Viewing Space (1, 1, 1) Y X x (pix) z Height Height View Port Projection Space (-1, -1, 0) Width z (0.f~1.f) y (pix) Width y (pix) Window Space typedef struct D3DVIEWPORT9 { DWORD X, Y; DWORD Width, Height; float MinZ, MaxZ; } D3DVIEWPORT9, *LPD3DVIEWPORT9; Use IDirect3DDevice9::SetViewport or Default ViewPort

  12. RENDER TO TEXTURE AND ITS TEXTURE MAPPING

  13. Render To Texture • 1st Make 2D Texture as Render Target • - IDirect3DDevice9::CreateTexture • - Usage : D3DUSAGE_RENDERTARGET • - Ref : Find the Index with ‘D3DUSAGE’ in DX SDK Document • 2nd Bind 2D Texture resource to Surface (Display Memory – Back buffer) • - IDirect3DTexture9::GetSurfaceLevel • 3rd Define Rectangle Vertice (POSITION and TEXTURE) • - IDirect3DDevice9::CreateVertexBuffer • ----------------------------------------------------------------------------------------------------- • 4th Set Render Target with the Surface • - IDirect3DDevice9::SetRenderTarget • 5th Set Proxy Vertex Buffer Resources • - IDirect3DDevice9::SetStreamSource • 6th Setting another resources and states • 7th Draw RENDER TO TEXTURE AND ITS TEXTURE MAPPING

  14. Texture Mapping by Using Shade model 3.0 • 1st Use D3DXCreateEffectFromFile(…) • 2nd Bind texture resource to Shader Effect • - ID3DXBaseEffect::SetTexture • 3rd Flush effect state changes before ‘Draw’ • - ID3DXEffect::CommitChanges • ---------------------------------------------------------------------------------------------------- • 4th Declare • - ‘texture g_tex2DTest;’ in fx code • 5th Sampler State Setting • - sampler2D TestSampler2D = sampler_state{ • Texture = (g_tex2DTest); • … • } • 6th tex2D( TestSampler2D, float2(x, y) ); • - x, y must be normalized : 0~1 • - Return type is float4 vector RENDER TO TEXTURE AND ITS TEXTURE MAPPING

  15. SCENE STAGE SETTING & PROJECTION

  16. Scene Stage Setting #1 SCENE STAGE SETTING & PROJECTION 1 : (1, 1, 1) 6 : (-1, -1, -1) x Object3 Blue Color z 4 5 3 0 1 Center : (2, 2, 1) Object1 Red Color x 6 7 1 2 Center : (1, -3, -2) 3 Object Space Object2 Green Color y y 2 Center : (-4, 2, -2) x Rotation Axis : (1, -1, -1) Phong Illumination! z World Space z Parameter Setting for - D3DXMatrixLookAtLH - D3DXMatrixOrthogonalLH

  17. Scene Stage Setting #2 SCENE STAGE SETTING & PROJECTION x (0, 500, -500) (1000, 500, 0) y Rotation Axis : X-axis (0, -500, -500) (1000, -500, 0) World Space z Parameter Setting for - D3DXMatrixLookAtLH - D3DXMatrixPerspectiveLH

  18. Projections SCENE STAGE SETTING & PROJECTION x x (pix) Height z Render To Texture by orthogonal projection y (pix) World Space for Scene 1 Width Texture Mapping (0, 500, -500) (1000, 500, 0) x (pix) x y Render To Screen (Back-buf) Perspective projection Height (0, -500, -500) (1000, -500, 0) y (pix) World Space for Scene 2 Width z

  19. PROJECT SAMPLE CODE

  20. CRenderManager Class • 1. CRenderManager Class in Project1Renderer.cpp/h • Scene1,2’s initial Camera State • Two Vertex Declarations • POSITION&NORMAL for Scene1 • POSITION&TEXTURE for Scene2 • Two Vertex Buffers • Cube vertex buffer with index buffer for Scene1 • Rect. Vertex buffer for Scene2 • You may change the Camera state • CameraControlScene1(), CameraControlScene2() • Don’t have to do ‘Present(…)’ PROJECT SAMPLE CODE

  21. CRenderManager Class • RenderScene1() • Use m_matWS2OS_3 array • Setting the Shading Space to the Object Space • Cheaper way • May be used the World Space as the Shading Space • Orthogonal Projection • Render To Texture • RenderScene2() • Texture Mapping • Perspective Projection • Render To Back-buffer (Window Screen)

  22. Sample Shader Code • 2. Project1DX9.fx • You may change the sampler states and data structure • Use the Shader model 3.0 • Phong illumination model is available only in the shader code • You may assume that the light resource model is simplified. • may use parallel-light ray • may use the View direction as the parallel-light ray direction • In this case, specular can be represented as power of diffuse term PROJECT SAMPLE CODE

  23. Pseudo code for CRenderManager Class • 1. Initialization • Declare Rendertarget Texture • Create Shader Effect • Initial Matrix Setting : World Space  Object Space • Vertex / Index Bufffers : Given buffers PROJECT SAMPLE CODE

  24. Pseudo code for CRenderManager Class • 1. RenderScene1 PROJECT SAMPLE CODE // Backup Old RenderTarget Surface with Scene1’s camera states // Make View and Projection matrix // Set Device Resources such as buffers and declarations // Set Texture as RenderTarget // Effect Technique and Pass Begin for i : 0 to 2 { // Object[i] Parameters to the Shading Space and Set the parameters // Set the matrix : Object to Display(Screen) Space // CommitChanges // Draw  Run the Shader code } // Effect Technique and Pass End // Set the Old Render Target

  25. Pseudo code for CRenderManager Class • 1. RenderScene2 PROJECT SAMPLE CODE // Make View and Projection matrix with Scene2’s camera states // Set Device Resources such as buffers and declarations and Textures // Effect Technique and Pass Begin // CommitChanges // Draw  Run the Shader code // Effect Technique and Pass End // Set the Old Render Target

  26. PROJECT SUBMISSION

  27. E-MAIL : korfriend@gmail.com Due-Day : 2009/10/6, 23:59:59 (My Gmail Time --;) Delay Penalty : -20% per day Don’t have to submit a document about this HW. Submit your source files.

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