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# Computer Graphics

## Subdivision Algorithm

Subdivision Algorithm 1. Initialize the area to be the whole screen. 2. Create a PVPL with respect to an area, sorted on z min (the smallest z coordinate of the …

## Area subdivision Method

Area subdivision Method This hidden surface removal technique is essentially an image space method But object space operations can be used to accomplish depth ordering of surfaces Takes advantage of …

Z (depth) Buffer Algorithm For each polygon { for each pixel (x, y) inside the polygon projection area { if (z_polygon_pixel(x,y) < depth_buffer(x,y)){ depth_buffer(x,y) = z_polygon_pixel(x,y); color_buffer(x,y) = polygon color …

## How to choose the polygon that has the closet Z for a given pixel?

Example: eye at z = 0, farther objects have increasingly positive values, between 0 and 1 1. Initialize (clear) every pixel in the z buffer to 1.0 2. Track polygon …

## Back Face Algorithm

Back Face Algorithm Back Face detection, also known as Plane Equation method, is an object space method in which objects and parts of objects are compared to find out the …

## Depth Cueing

Depth Cueing Hidden surfaces are not removed but displayed with different effects such as intensity, color or shadow for giving hint for third dimension of the object. It is called …

## Hidden surface and hidden surface detection

Hidden surface and hidden surface detection Hidden surfaces are that objects which are behind from the objects closer to eye and we can not see with eye. The identification and …

## Parallel Projection

Parallel Projection Basic Principles: – The parallel projection used  by drafters and engineers to create working  drawings of an object which preserves its scale and shape. The complete representation  of …