FREE OpenGL Functions Questions and Answers

Question 1

Performs indexed rendering using the current attribute arrays and the bound GL ELEMENT ARRAY BUFFER (supplied by the VAO).

Accepted Answer

glDrawElements

Answer

glbindbufferrange

Answer

glgetattriblocation

Answer

gldrawarrays

Question 2

Retrieves several context state integer values as well as implementation-dependent integer values. Other typed glGet* functions include glGetFloatv, glGetBooleanv, and several others. The enumerator that is supplied to this determines how many values it returns.

Accepted Answer

glGetIntegerv

Answer

gluniform

Answer

glgetattriblocation

Answer

glbindbufferrange

Question 3

Sets the specified uniform in the active program (as determined by glUseProgram) to the fixed value. This is a collection of functions accepting several kinds rather than just one.

Accepted Answer

glUniform

Answer

glgetintegerv

Answer

glgetuniformlocation

Answer

glbindbufferrange

Question 4

Binds an object with a vertex array to the GL VERTEX ARRAY target.

Accepted Answer

glBindVertexArray

Answer

gldrawarrays

Answer

gluniform

Answer

glviewport

Question 5

Create and modify buffer objects using these functions. One or more buffers are created by glGenBuffers, attached to a context location by glBindBuffer, and then filled with user data by glBufferData, which allocates memory.

Accepted Answer

glGenBuffers, glBindBuffer, glBufferData

Answer

glEnableVertexAttribArray, glDisableVertexAttribArray, glVertexAttribPointer

Answer

vec mix(vec initial, vec final, float alpha);

Answer

glcreateprogram, glattachshader, gllinkprogram, gldetachshader

Question 6

Enables depth testing by setting the depth comparison function. If GL DEPTH TEST is not allowed, it has no impact.

Accepted Answer

glDepthFunc

Answer

gldepthrange

Answer

glviewport

Answer

gldepthmask

Question 7

Similar to glDrawElements, but before completing the array lookup, each element index is offset by a constant value. This helps reduce the amount of buffer object binds that must be made in a program.

Accepted Answer

glDrawElementsBaseVertex

Answer

gldepthmask

Answer

glcleardepth

Answer

glbindbufferrange