Interview Questions and Answers

Rasterization is the process of converting vector graphics into raster images. It involves determining which pixels to illuminate based on the geometric shapes in the scene.

Example:

In a 3D rendering pipeline, rasterization converts 3D primitives like triangles into 2D pixel representations for display.

Texture mapping involves applying a 2D image (texture) onto a 3D surface to enhance its appearance. This is commonly used for adding details like colors, patterns, or images to objects.

Example:

Mapping a brick texture onto a 3D wall model to give it a realistic appearance.

A framebuffer is a memory buffer that holds pixel values for display. It represents the image being rendered and is often used in conjunction with a display device.

Example:

Storing pixel values in a framebuffer before sending them to the monitor for display.

A graphics API (Application Programming Interface) is a set of tools and functions for interacting with graphics hardware. Graphics hardware, on the other hand, refers to the physical components responsible for rendering graphics.

Example:

OpenGL and DirectX are examples of graphics APIs, while a GPU (Graphics Processing Unit) is an example of graphics hardware.

A vertex buffer is a region of memory used to store vertex data, such as positions, colors, and texture coordinates. It is a crucial component in efficient rendering pipelines.

Example:

Storing 3D vertex information in a vertex buffer for rendering a complex 3D model.

Culling is the process of excluding objects or parts of objects that are not visible in the final image. This optimization helps improve rendering performance.

Example:

Removing back-facing triangles during rendering to enhance efficiency through culling.