VEX - General Concepts 2

Which function generates Perlin noise in VEX?

• noise()
• perlin()
• random()
• generateNoise()

Answer explanation

The 'noise()' function generates Perlin noise or other procedural noise types in VEX.

Which noise function is best for simulating natural terrain?

• rand()
• perlin()
• cellnoise()
• gridnoise()

Answer explanation

The 'perlin()' function generates smooth, natural-looking noise ideal for terrain simulation.

Which function is used to copy group membership from one group to another?

• copygroup()
• mergegroups()
• setgroup()
• addgroup()

Answer explanation

The 'setgroup()' function can be used to copy group membership by combining logic.

Which data type can arrays in VEX NOT store?

• int
• float
• vector
• matrix3

Answer explanation

Arrays in VEX cannot store matrix3 data types directly.

Which approach is generally better for debugging complex workflows?

• VEX
• VOPs
• Common nodes
• None of the above

Answer explanation

VOPs provide a visual representation, making them easier to debug for complex workflows.

How do you control the frequency of noise in VEX?

• Adjusting the seed value
• Scaling the input vector
• Using the 'frequency()' function
• Using the 'modulate()' function

Answer explanation

Scaling the input vector increases or decreases the frequency of the noise.

When is it better to use VOPs instead of VEX?

• When creating procedural shaders
• For tasks requiring high performance
• For visual debugging
• For scripting

Answer explanation

VOPs are better for tasks where visual debugging is needed.

How does the VEX documentation categorize functions?

• Alphabetically
• By context (SOPs, DOPs, etc.)
• By data type
• All of the above

Answer explanation

VEX functions are categorized alphabetically, by context, and by data type for easy navigation.

What is the result of the dot product if two vectors are perpendicular?

• 0
• 1
• -1
• The magnitude of one vector

Answer explanation

The dot product of two perpendicular vectors is always 0.

How do you assign group membership based on an attribute value?

• Using 'setgroup()' with condition
• Using 'groupattrib()'
• Using 'groupbyattrib()'
• Using 'addgroupattrib()'

Answer explanation

setgroup()' combined with a conditional statement assigns group membership based on an attribute.