OpenGL

Apple GPU Only support old version

GPU Side

GLSL

Like C++ but without:

• Pointers

• Dynamic memory allocation

• Recursion

• User-defined classes

Has its own built-in classes

• vec2, vec3, vec4, mat2, mat3, mat4, etc.

Also has a built-in linear algebra library for common graphics functions

• normalize, length, dot, cross, reflect, sin, cos, etc.

We had you write your linear algebra library to follow the GLSL API

• While the functions called in the shaders may look like the ones you wrote, they are different function calls!

---

rgb, xyz

wxyz

vert, frag

Sobel: edge detection

Pipeline

gl bind

• glBufferData
• glBindBuffer

from CPU to GPU

GL_ELEMENT_ARRAY_BUFFER:

GL_ARRAY_BUFFER

CPU Side

Vertex Data

GLSL optimize redundant object(has no effect): don't

Associating “in” variables with VBOs

每个vertices一个normal，不光滑，连接处的所有normal合并了就光滑了（举例maya）