one.rar_正四面体程序

#include <GL/glut.h> typedef GLfloat point[3]; point v[]={{-1.0, -0.58}, {1.0, -0.58}, {0.0, 1.15}}; int n; int i,x0,y0; void triangle(point a, point b, point c) { glBegin(GL_POLYGON); glVertex3fv(a); glVertex3fv(b); glVertex3fv(c); glEnd(); } void divide_triangle(point a, point b, point c, int m) { point v1, v2, v3; int j; if(m>0) { for(j=0; j<3; j++) v1[j]=(a[j]+b[j])/2; for(j=0; j<3; j++) v2[j]=(a[j]+c[j])/2; for(j=0; j<3; j++) v3[j]=(b[j]+c[j])/2; divide_triangle(a, v1, v2, m-1); divide_triangle(c, v2, v3, m-1); divide_triangle(b, v3, v1, m-1); } else triangle(a,b,c); } void display(void) { glClear(GL_COLOR_BUFFER_BIT); glColor3f(0.0,1.0,0.0); divide_triangle(v[0], v[1], v[2], n); glColor3f(1.0,1.0,0.0); divide_triangle(v[3], v[2], v[1], n); glColor3f(0.0,0.0,1.0); divide_triangle(v[0], v[3], v[1], n); glColor3f(1.0,0.0,0.0); divide_triangle(v[0], v[2], v[3], n); glFlush(); } void myinit() { glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); glMatrixMode(GL_MODELVIEW); glClearColor (1.0, 1.0, 1.0, 1.0); glColor3f(0.0,1.0,0.0); } void motion(int x,int y) { if(y-125*v[0][0]-250>0 && y+1.73*x-125*v[1][1]-216.25*v[1][0]-682.5<0 && y-1.73*x-125*v[0][1]+216.25*v[0][0]+182.5<0) { y = 500-y; for(int j=0;j<3;j++) v[j][0] = v[j][0]+(x-x0)/125.0; for(j=0;j<3;j++) v[j][1] = v[j][1]+(y-y0)/125.0; x0 = x; y0 = y; glClearColor (0.0, 1.0, 1.0, 1.0); display(); } } void mouse(int button, int state, int x, int y) { if(button == GLUT_RIGHT_BUTTON && state == GLUT_DOWN) { glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-2.0-0.5*i, 2.0+0.5*i, -2.0-0.5*i, 2.0+0.5*i, -2.0-0.5*i, 2.0+0.5*i); glMatrixMode(GL_MODELVIEW); display(); i = i+1-(i+1)/5*5; } if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) { y = 500-y; if(y-125*v[0][0]-250>0 && y+1.73*x-125*v[1][1]-216.25*v[1][0]-682.5<0 && y-1.73*x-125*v[0][1]+216.25*v[0][0]+182.5<0) { glColor3f(1.0,0.0,0.0); glClearColor (1.0, 1.0, 1.0, 1.0); display(); x0 = x; y0 = y; } } if(button == GLUT_LEFT_BUTTON && state == GLUT_UP) { y = 500-y; glColor3f(0.5,1.0,0.5); glClearColor (1.0, 1.0, 1.0,1.0); display(); } } void KeyBoardCB(unsigned char key, int x, int y) { if(key == 27) exit(0); } int main(int argc, char **argv) { n=4; i=1; x0 = 0; y0=0; glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); glutInitWindowSize(500, 500); glutCreateWindow("计算机图形学实验"); glutDisplayFunc(display); myinit(); glutMouseFunc(mouse); glutMotionFunc(motion); glutKeyboardFunc( KeyBoardCB ); glutMainLoop(); return 0; }