diff options
Diffstat (limited to 'sdl/GL_notes.txt')
| -rw-r--r-- | sdl/GL_notes.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sdl/GL_notes.txt b/sdl/GL_notes.txt new file mode 100644 index 0000000..c4d71fe --- /dev/null +++ b/sdl/GL_notes.txt @@ -0,0 +1,44 @@ +Performance +- Depth Testing, aka Z-buffer +- Culling: don't render what you can't see + +Terms +- Winding: by default, primitives that follow in CCW fashion are front facing + +Projections +- Orthographic: glOrtho(), define visibility in a *volume* +- Perspective: gluPerspective() + +Transformations +- Viewing: specifies the location of the viewer or camera (must be specified first) +- Modeling: moves objects around the scene +- Modelview: describes the duality of viewing and modeling transformations +- Projection: sizes and reshapes the viewing volume (squishing 3D data down into 2D) +- Viewport: a pseudo-transformation that scales the final output to the window + +Matrices +- Modelview +- Projection +- Texture + +Buffers +- Color Buffer +- Depth Buffer, aka Z-buffer +- Stencil Buffer +- Multisampling Buffer +- Accumulation Buffer: this buffer allows you to render to the color buffer, and + then instead of displaying the results in the window, copy the contents of the + color buffer to the accu-mulation buffer. +- Front Buffer +- Back Buffer + +Terms + - Dithering: simulate displaying wider range of colors on on systems with small + amount of colors + - Texture Filtering: process of calculating color fragments from a stretched or + shrunken texture map + +OBJ Loader +- glGenTextures() +- glBindTextures() + |