Computer Graphics

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 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 …

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 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 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 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 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 …

Perspective Projection Perspective projections are used to produce images which look natural.When we view scenes in everyday life far away items appear small relative to nearer items. Basic Principles: -The …

Taxonomy of Projection