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 …
Read More »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 …
Read More »Z buffer algorithm Advantages and Disadvantages
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 …
Read More »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 …
Read More »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 …
Read More »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 …
Read More »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 …
Read More »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 …
Read More »Perspective Projection
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 …
Read More »Taxonomy of Projection
Taxonomy of Projection
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