OpenGL OpenGL Shaders 2

Question 1

What GLSL built-in function returns the dot product of two vectors?

Accepted Answer

dot()

Answer

cross()

Answer

reflect()

Answer

normalize()

Question 2

Which GLSL type represents a 4×4 floating-point matrix?

Accepted Answer

mat4

Answer

mat3

Answer

vec4

Answer

dmat4

Question 3

What does the GLSL built-in texture() function do?

Accepted Answer

Samples a texture at given coordinates

Answer

Creates a new texture object

Answer

Binds a texture unit

Answer

Deletes a texture

Question 4

Which GLSL qualifier marks a fragment shader output variable that writes to a color attachment?

Accepted Answer

out

Answer

in

Answer

uniform

Answer

varying

Question 5

What is the purpose of the GLSL normalize() function?

Accepted Answer

Scales a vector to unit length

Answer

Rounds float components to integers

Answer

Clamps values between 0 and 1

Answer

Computes vector cross product

Question 6

Which GLSL version directive is required to use the core profile layout qualifiers?

Accepted Answer

#version 330 core

Answer

#version 110

Answer

#version 120

Answer

#version 210