1. OpenGL Graphics Textures

2. Quiz You didn't see that coming!

3. 1. What is OpenGL?

4. 2. What is a vertex?

5. 3. What are the three steps to render with depth testing?

6. 4. What is the difference between an orthographic and a perspective projection matrix?

7. 5. What are the three components of the fixed functionality lighting model?

8. Textures

9. What is a Texture? Image applied to geometry.tga,.jpg,.png files 1, 2 or 3 dimensional!

10. Texture Coordinates Vertex attribute Values between 0 and 1 1, 2 or 3-dimensional OpenGL will interpolate between the vertices

11. TextureTriangle

12. Sampling Textures Exceedingly rare that the texture will fit the geometry exactly We need a way of mapping to the best representative texel Nearest-neighbour filtering Bilinear filtering

13. Mipmaps Used to improve the sampling quality

15. Mipmaps Can specify mipmap level when loading a texture into OpenGL glGenerateMipmap() Trilinear filtering

16. OpenGL Texture Objects Stores a texture in GPU memory and holds texture properties glGenTextures() glBindTexture() glTexImage2D() glTexParamf() glDeleteTextures()

17. Demo

18. Questions?