Design, develop and implement 2D sierpinski gasket

				
					#include <GL/glut.h>
typedef GLfloat point2[2];
/* initial triangle – global variables */
point2 v[]={
{-1.0, -0.58}, {1.0, -0.58}, {0.0, 1.15}
};
int n; /* number of recursive steps */
void triangle( point2 a, point2 b, point2 c)
/* display one triangle */
{
glBegin(GL_TRIANGLES);
glVertex2fv(a);
glVertex2fv(b);
glVertex2fv(c);
glEnd();
}

void divide_triangle(point2 a, point2 b, point2 c, int m)
{
/* triangle subdivision using vertex coordinates */
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;
divide_triangle(a, v0, v1, m-1);
divide_triangle(c, v1, v2, m-1);
divide_triangle(b, v2, v0, m-1);

}
else(triangle(a,b,c));
/* draw triangle at end of recursion */
}

void myinit()
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();replaces the current matrix with the identity matrix.
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 display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
divide_triangle(v[0], v[1], v[2], n);
glFlush();
}

int main(int argc, char **argv)
{
n=4;
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

glutInitWindowSize(500, 500);
glutCreateWindow(“2D Gasket");
glutDisplayFunc(display);
myinit();
glutMainLoop();
}

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