Develop
2003.04.23 10:46
[c] 시어핀스키 가스킷..(p.582, A.2 - 두번째)
조회 수 7522 댓글 0
#include<Gl/glut.h>
typedef float point2[2];
point2 v[] = { {-1.0, -0.58}, {1.0, -0.58}, {0.0, 1.15} };
int n;
void triangle(point2 a, point2 b, point2 c);
void divside_triangle(point2 a, point2 b, point2 c, int m);
void display(void);
void myinit();
void triangle(point2 a, point2 b, point2 c)
{
glBegin(GL_TRIANGLES);
glVertex2fv(a);
glVertex2fv(b);
glVertex2fv(c);
glEnd();
}
void divside_triangle(point2 a, point2 b, point2 c, int m)
{
point2 v0, v1, v2;
int j;
if(m>0)
{
for(j=0; j<2; j++) v0[j] = (a[j]+b[j]) / 2;
for(j=0; j<2; j++) v1[j] = (a[j]+c[j]) / 2;
for(j=0; j<2; j++) v2[j] = (b[j]+c[j]) / 2;
divside_triangle(a, v0, v1, m-1);
divside_triangle(c, v1, v2, m-1);
divside_triangle(b, v2, v0, m-1);
}
else(triangle(a,b,c));
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
divside_triangle(v[0], v[1], v[2], n);
glFlush();
}
void myinit()
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-2.0, 2.0, -2.0, 2.0);
glMatrixMode(GL_MODELVIEW);
glClearColor(1.0, 1.0, 1.0, 1.0);
glColor3f(0.0, 0.0, 0.0);
}
void main(int argc, char **argv)
{
n = 5;//atoi(argv[1]);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(500, 500);
glutCreateWindow("3D Gasket");
glutDisplayFunc(display);
myinit();
glutMainLoop();
}
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