Midpoint subdivision algorithm for line clipping pdf merge

Midpoint subdivision generalizes the Lane-Riesenfeld algorithm for uniform tensor product splines and can also be applied to non-regular meshes. Since their first appearance in 1974, subdivision algorithms for generating surfaces of arbitrary topology have gained widespread popularity in Friday, July 18, 2014. Opengl,C++ : Line_clipping scratch code using midpoint subdivision method. void DrawLineSegment(int x0, int y0, int x1, int y1){. glColor3d(1,0,0); glBegin(GL_LINES) Why is midpoint subdivision algorithm preferred over Cohen-Sutherland algorithm? The cohen sutherland algo requires calculation of intersection of the line with the window edge.This direct calculation is avoided by performing a binary search for the intersection by always dividing the line at Line Clipping. Midpoint Algorithm: Intersection with a horizontal edge. x = xmin. BA. y = ymin y = ymin-1/2. Cohen-Sutherland for Line Clipping. • Clipping is performed by computing intersections with four boundary segments of the window: Li, i=1,2,3,4 • Purpose: Fast treatment of lines that are trivially. We introduce an exact subdivision algorithm CEVAL for isolating complex roots of a square-free polynomial. The subdivision predicates are based on evaluating the original Algorithms used for line clipping are: Cohen-Sutherland clipping Cyrus Beck clipping Midpoint subdivision algorithm. Click here to get an answer to your question using midpoint subdivision line clipping algorithm illustrate a clipping of a line segment joining two end po sakshikashid965 is waiting for your help. Add your answer and earn points. Classical line clipping algorithms includes Cohen-Sutherland algorithm, Midpoint Subdivision algorithm, Liang Bearsky and Nicholl-Lee-Nicholl algorithm. Until recently, most works are concentrated on accelerating the intersection calculation so as to improve the clipping efficiency Cohen-Sutherland Algorithm. • Classical line clipper • Trivial accept and trivial reject • Iterative subdivision strategy • Plane partitioning using 4 bit code. Iterative Subdivision. • Select a vertex (outside) • Priority ranking of window edges • Divide line at intersection with edge of highest priority Also the Sutherland Cohen subdivision line clipping algorithm requires the calculation of the intersection of the line with the window edge. These calculations can be avoided by repetitively subdividing the line at its midpoint. Like other algorithm, initially the line is tested for visibility. Abstract: A parallel line clipping algorithm and its implementation on a parallel clipping hardware environment are presented. We rst develop a simple theory to show that parallel clipping is possible for all types of line seg-ments. We then present the architecture of a hardware environment based on The mid-point subdivision line drawing algorithm subdivides the line at its midpoints continuously. The Mid-point Subdivision algorithm helps to compute or calculate the visible areas of lines that appear in the window. circle drawing algorithm.