Week 2: Review of graphics API

1. Week 2: Review of graphics API OpenGL design

2. Modern graphics pipeline

3. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

4. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

5. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

6. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

7. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

8. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

9. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

10. Modern graphics pipeline Application Command Geometry Rasterization Texture Fragment Display

11. Modern graphics pipeline Application Application & higher level libraries world Command Geometry Rasterization Graphics API world Texture Fragment Display

12. OpenGL block diagram Generation Traversal Xformation Rasteriz. & tex. Display Display list Per-vertex operations & Primitive assembly Per- fragment operations Frame buffer Video display Evaluator Rasterization Application generation Application traversal Texture memory Pixel operations Application & higher level graphics libraries OpenGL implementation

13. OpenGL operation: conceptual model Configure how OpenGL should draw stuff Draw stuff

14. Configuring OpenGL “We view OpenGL as a state machine that controls a set of specific drawing operations” Two types of state: server and client. Most refer to server

15. Drawing • Begin/End paradigm • Only certain commands allowed inside the block

16. OpenGL command syntax

17. GL data types • GLfloat, GLint, etc.

18. GL values • In CAPITAL LETTERS • e.g. GL_LIGHT0, GL_AMBIENT • Use bitwise OR command to combine them, e.g. glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);