⬑

OpenGL APIs

#图形学

Clear color

glClearColor glClear

Create buffer

• glGenBUffers
• glBindBuffer
• glBufferData
• (glBufferSubData)

Compile shader

• glCreateShader
• glShaderSource

• glCompileShader

• glCreateProgram

• glAttachShader
• glLinkProgram

• glUseProgram

• glDeleteShader

Error handling

• glGetProgramiv

• glGetProgramInfoLog

• glGetShaderiv

• glGetShaderInfoLog

Vertex array

• glVertexAttribPointer
• glEnableVertexAttribArray

Draw

• glBindVertexArray
• glDrawArrays

Index buffer

• glBindBuffer
  • first vertex buffer, then element vector
  • and element is attached to vertex
• glDrawElements after glBindVertexArray

Shaders

output of vertex shader is the input of fragment shader.

Uniform

uniform is “global value” of shader.

• glGetUniformLocation
• glUniform4f

Interpolation

color is interpolated among three vertices of a triagle.