Explication du fonctionnement des API 3D matériels, comme opengl, directx.

2. Surfaces, Lumières,

3. Cameras,

6. Les Modeling transforms font le changement de repère (world space) Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display Object space World space

8. Modèles d'illumination (Diffuse, Ambient, Phong, etc.) Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display

10. La position de visualisation est transformé selon l'origine & et sa direction est orienté selon l'axe (en général z ) Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display Eye space World space

11. Clipping Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display Eye space frustum

13. Interpolation des valeurs

14. (couleur, pronfondeur, etc.) Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display

16. Chaque étape du pipeline est un forme de transformation Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display

18. Systèmes de Coordonnées Modeling Transformations Illumination (Shading) Viewing Transformation (Perspective / Orthographic) Clipping Projection (to Screen Space) Scan Conversion (Rasterization) Visibility / Display Object space World space Eye Space / Camera Space Clip Space (NDC) Screen Space

19. Matériel - GPU

20. Matériel - GPU OpenGL (vertex) buffer object GPU command processor vertex puller hardware rendering pipeline CPU CPU writes of command + vertex indices vertex array GPU DMA transfer of command data application (client) memory memory reads CPU GPU DMA transfer of vertex data—CPU never reads data command queue

22. Shader – ambient lighting // Vertex Shader void main() { gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } // Fragment Shader void main() { gl_FragColor = vec4(0.2, 0.6, 0.8, 1); }

23. Shader – ambient lighting