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//Program to implement Basic Incremental Algorithm //Working on ubuntu #include <GL/glut.h> #include<stdlib.h> #include <stdio.h> GLfloat x0,x1,y0,y1; //Input variables taken as global int flag=1; //variable for display1() void init(void) { glClearColor(0.0,0.0,0.0,0.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0.0,500.0,0.0,500.0); } void PutPixel(GLfloat x,GLfloat y) { glBegin(GL_POINTS); glVertex2f(x,y); //To display pixels on-screen glEnd(); glFlush(); } void display1(void) … 
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