2D Game Development 2D Rendering and Graphics 1

Question 1

What is a 'draw call' in 2D game rendering?

Accepted Answer

A command sent to the GPU to render a batch of geometry

Answer

Each draw call submits geometry and state changes to the GPU; minimizing them through batching is critical for 2D game performance.

Question 2

What is 'sprite batching' in 2D rendering?

Accepted Answer

Combining multiple sprite draw calls that share the same texture into a single GPU call

Answer

Sprite batching groups all sprites using the same texture atlas into one draw call, reducing CPU-GPU overhead and improving rendering performance.

Question 3

What is a 'shader' in 2D game graphics?

Accepted Answer

A program running on the GPU that controls how pixels and vertices are rendered

Answer

Shaders are small GPU programs (vertex and fragment/pixel shaders) that determine how geometry is transformed and how each pixel's color is calculated.

Question 4

What is the 'painter's algorithm' in 2D rendering?

Accepted Answer

Rendering objects from back to front so nearer objects overdraw farther ones

Answer

The painter's algorithm sorts objects by depth and draws them back-to-front so that overlapping objects appear correctly without needing a depth buffer.

Question 5

What is texture 'filtering' (bilinear vs. nearest-neighbor) in 2D games?

Accepted Answer

Nearest-neighbor keeps pixels sharp; bilinear blends between pixels for smoother scaling

Answer

Nearest-neighbor sampling picks the closest pixel when scaling, preserving the sharp look of pixel art, while bilinear interpolation blends neighboring pixels for smoother scaling of non-pixel art.

2D Game Development Practice Test

2D Game Development Practice Test

2D Game Development 2D Rendering and Graphics 1