#include <gl/glut.h> #include <math.h>
inline int round(const float a) { return int(a 0.5); }
void setpixel(int x, int y) { glbegin(gl points); glvertex2i(x, y); glend(); }
void linedda(int x0, int y0, int xend, int yend)
{ int dx xend-x0, dy yend-y0, steps, k; float xincrement, yincrement, x x0, y y0 if (fabs(dx) > fabs(dy)) steps fabs(dx); else steps fabs(dy); xincrement float(dx) / float(steps); yincrement float(dy) / float(steps); setpixel(round(x), round(y)); for (k 0; k < steps; k) { x xincrement; y yincrement; setpixel(round(x), round(y)); } } void init(void) { glmatrixmode(gl projection);
gluortho2d(0.0, 200.0, 0.0, 150.0); (이하 생략)
