#include #include # include # include # include float bijelo[] = {1.0f, 1.0f, 1.0f, 0.0f}; float crno[] = {0.0f, 0.0f, 0.0f}; float smedje[] = {238.0f / 255.0f, 154.0f / 255.0f, 73.0f / 255.0f}; float crveno[] = {1.0f, 0.0f, 0.0f}; double kut = 0.0; int verzija = 0, nn = 16; double pz =0.0; double rx= 0.0; void normiraj(double *v) { double d = sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]); v[0] /= d; v[1] /= d; v[2] /= d; } // normiraj void vprodukt(double *v, double a0, double a1, double a2, double b0, double b1, double b2) { v[0] = a1 * b2 - a2 * b1; v[1] = a2 * b0 - a0 * b2; v[2] = a0 * b1 - a1 * b0; } // vprodukt void kocka(double a) { glBegin(GL_QUADS); glNormal3d(0.0, 0.0, -1.0); glVertex3d(0.0, 0.0, 0.0); glVertex3d(0.0, a, 0.0); glVertex3d(a, a, 0.0); glVertex3d(a, 0.0, 0.0); glNormal3d(0.0, 0.0, 1.0); glVertex3d(0.0, 0.0, a); glVertex3d(a, 0.0, a); glVertex3d(a, a, a); glVertex3d(0.0, a, a); glEnd(); glBegin(GL_QUAD_STRIP); glNormal3d(0.0, -1.0, 0.0); glVertex3d(0.0, 0.0, a); glVertex3d(0.0, 0.0, 0.0); glVertex3d(a, 0.0, a); glVertex3d(a, 0.0, 0.0); glNormal3d(1.0, 0.0, 0.0); glVertex3d(a, a, a); glVertex3d(a, a, 0.0); glNormal3d(0.0, 1.0, 0.0); glVertex3d(0.0, a, a); glVertex3d(0.0, a, 0.0); glNormal3d(-1.0, 0.0, 0.0); glVertex3d(0.0, 0.0, a); glVertex3d(0.0, 0.0, 0.0); glEnd(); } // kocka void kvadar(double a, double b, double c) { glBegin(GL_QUADS); glNormal3d(0.0, 0.0, 1.0); glVertex3d(0.0, 0.0, 0.0); glVertex3d(0.0, b, 0.0); glVertex3d(0, b, c); glVertex3d(0, 0, c); glNormal3d(0.0, 0.0, -1.0); glVertex3d(a, 0.0, 0); glVertex3d(a, 0.0, c); glVertex3d(a, b, c); glVertex3d(a, b, 0); glEnd(); glBegin(GL_QUAD_STRIP); glNormal3d(0.0, 1.0, 0.0); glVertex3d(0.0, 0.0, 0.0); glVertex3d(a, 0.0, 0.0); glVertex3d(0, b, 0); glVertex3d(a, b, 0.0); glNormal3d(1.0, 0.0, 0.0); glVertex3d(0, b, c); glVertex3d(a, b, c); glNormal3d(0.0, 1.0, 0.0); glVertex3d(0.0, 0, c); glVertex3d(a, 0, c); glNormal3d(-1.0, 0.0, 0.0); glVertex3d(0.0, 0.0, 0.0); glVertex3d(0.0, b, 0.0); glEnd(); } // kvadar void polukugla(double R) { double ntheta = 20; double nphi=20; double t, r, z; double theta, step_theta = M_PI / ntheta; double r1, r2, z1, z2; int i; theta = M_PI / 2.0 - step_theta; r = R * cos(theta); z = R * sin(theta); for(theta = M_PI / 2.0 - 2.0 * step_theta; theta > -M_PI / 2.0; theta -= step_theta) { r1 = R * cos(theta); r2 = R * cos(theta + step_theta); z1 = R * sin(theta); z2 = R * sin(theta + step_theta); glBegin(GL_QUAD_STRIP); t = 0.0; for(i = 0; i <= nphi/2; i++) { glNormal3d(r2 * cos(t) / R, r2 * sin(t) / R, z2 / R); glVertex3d(r2 * cos(t), r2 * sin(t), z2); glNormal3d(r1 * cos(t) / R, r1 * sin(t) / R, z1 / R); glVertex3d(r1 * cos(t), r1 * sin(t), z1); t += 2.0 * M_PI / nphi; } glEnd(); } } // polukugla void kugla(double R, int nphi, int ntheta) { double t, r, z; double theta, step_theta = M_PI / ntheta; double r1, r2, z1, z2; int i; // bliža kapica theta = M_PI / 2.0 - step_theta; r = R * cos(theta); z = R * sin(theta); glBegin(GL_TRIANGLE_FAN); glNormal3d(0.0, 0.0, 1.0); glVertex3d(0.0, 0.0, R); t = 0.0; for(i = 0; i <= nphi; i++) { glNormal3d(r * cos(t) / R, r * sin(t) / R, z / R); glVertex3d(r * cos(t), r * sin(t), z); t += 2.0 * M_PI / nphi; } glEnd(); // plaÅ¡t for(theta = M_PI / 2.0 - 2.0 * step_theta; theta > -M_PI / 2.0; theta -= step_theta) { r1 = R * cos(theta); r2 = R * cos(theta + step_theta); z1 = R * sin(theta); z2 = R * sin(theta + step_theta); glBegin(GL_QUAD_STRIP); t = 0.0; for(i = 0; i <= nphi; i++) { glNormal3d(r2 * cos(t) / R, r2 * sin(t) / R, z2 / R); glVertex3d(r2 * cos(t), r2 * sin(t), z2); glNormal3d(r1 * cos(t) / R, r1 * sin(t) / R, z1 / R); glVertex3d(r1 * cos(t), r1 * sin(t), z1); t += 2.0 * M_PI / nphi; } glEnd(); } // dalja kapica theta = -M_PI / 2.0 + step_theta; r = R * cos(theta); z = R * sin(theta); glBegin(GL_TRIANGLE_FAN); glNormal3d(0.0, 0.0, -1.0); glVertex3d(0.0, 0.0, -R); t = 0.0; for(i = 0; i <= nphi; i++) { glNormal3d(r * cos(t) / R, r * sin(t) / R, z / R); glVertex3d(r * cos(t), r * sin(t), z); t -= 2.0 * M_PI / nphi; } glEnd(); } // kugla void valjak (double r, double v) { int i; glBegin (GL_TRIANGLE_FAN); glNormal3d(0.0, 0.0, -1.0); glVertex3d(0.0, 0.0, v); double t; for(t = 0.0; t < 2.0 * M_PI+1; t += M_PI/10) { glVertex3d(r * cos(t), r * sin(t),v); } glVertex3d(0.0, 0.0, v); glEnd(); glBegin (GL_TRIANGLE_FAN); glNormal3d(0.0, 0.0, -1.0); glVertex3d(0.0, 0.0, 0.0); for(t = 2.0 * M_PI+1; t > 0.0; t -= M_PI/10) { glVertex3d(r * cos(t), r * sin(t),0); } glEnd(); glBegin (GL_QUAD_STRIP); for(t = 2.0 * M_PI+1; t > 0.0; t -= M_PI/10) { glNormal3d(cos(t), sin(t), 0.0); glVertex3d(r * cos(t), r * sin(t),0); glNormal3d(cos(t), sin(t), 0.0); glVertex3d(r * cos(t), r * sin(t),v); } glEnd(); } void stozac(double r, double h, int n) { double t, s, v[] = {0.0, 0.0, 0.0}; int i; // baza stožca glBegin(GL_TRIANGLE_FAN); glNormal3d(0.0, 0.0, 1.0); // normala je u smjeru -z za sve trokute glVertex3d(0.0, 0.0, 0.0); // središte baze je u ishodištu t = 0.0; for(i = 0; i <= n; i++) { glVertex3d(r * cos(t), r * sin(t), 0.0); t += 2.0 * M_PI / n; } glEnd(); glBegin(GL_TRIANGLE_STRIP); t = 2.0 * M_PI; for(i = 0; i <= n; i++) { vprodukt(v, -r * cos(t), -r * sin(t), h, -cos(t + M_PI / 2.0), -sin(t + M_PI / 2.0), 0.0); normiraj(v); glNormal3dv(v); glVertex3d(r * cos(t), r * sin(t), 0.0); t -= M_PI / n; // samo pola koraka vprodukt(v, -r * cos(t), -r * sin(t), h, -cos(t + M_PI / 2.0), -sin(t + M_PI / 2.0), 0.0); normiraj(v); glNormal3dv(v); // vektor normale u vrhu je okomit na bazu trokuta glVertex3d(0.0, 0.0, h); t -= M_PI / n; // dopuna do punog koraka } glEnd(); } // stozac void svjetlo0() { float pozicija[] = {0.0f, 0.0f, 0.0f, 1.0f}; // četvrti parametar postavljen na 1.0f definira "positional light" // na poziciji koju određuju prva tri parametra glLightfv(GL_LIGHT0, GL_DIFFUSE, bijelo); glLightfv(GL_LIGHT0, GL_SPECULAR, bijelo); glLightfv(GL_LIGHT0, GL_POSITION, pozicija); } // svjetlo0 void iscrtaj(void) { double r = 6.0, h = 18.0; // polumjer baze i visina stošca glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); // kamera gleda pola visine stošca iznad ishodišta gluLookAt(0.0, 40.0, 0.0, 0.0, 0.0, h / 2.0, 0.0, 0.0, 1.0); glPushMatrix(); // pamtimo da smo u ishodištu // postavljamo svjetlo 0 na odgovarajuću poziciju glTranslated(-8.0, 20.0, 3.0); svjetlo0(); // položaj svjetla 0 označit ćemo bijelom kockicom glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, bijelo); glMaterialfv(GL_FRONT, GL_EMISSION, bijelo); kocka(0.5); glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, crno); glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, crveno); glPopMatrix(); // vraćamo se u ishodište glTranslated(-4,0,0); glTranslated(0,0,pz); glRotated(60,1,0,0); glRotated(rx,0,1,0); valjak(1,12); glPushMatrix(); glTranslated(0,0,4); kvadar(10,0,3); glPopMatrix(); glPushMatrix(); glTranslated(5,5,5); glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, smedje); kugla(5,50,50); glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, crveno); glTranslated(0,4,0); valjak(1,9); glPopMatrix(); glPushMatrix(); glTranslated(5,9,5); glRotated(270,1,0,0); stozac(1,3,16); glRotated(kut,0,0,1); glTranslated(-10,0,2); glRotated(90,1,0,0); kvadar(20,0,1); glTranslated(10,0,10); glRotated(90,0,1,0); kvadar(20,0,1); glPopMatrix(); glTranslated(10,0,0); valjak(1,12); glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, bijelo); glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0); glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE); glutSwapBuffers(); } // iscrtaj void skaliraj(int w, int h) { double xmin = -10.0, xmax = 10.0; double xrange = xmax - xmin; double yrange = h * xrange / w; glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustum(xmin, xmax, -yrange / 2.0, yrange / 2.0, 20.0, 50.0); } // skaliraj void tipka(unsigned char c, int x, int y) { if(c == 'q') exit(0); if(c == 's') glShadeModel(GL_SMOOTH); if(c == 'D') glEnable(GL_DEPTH_TEST); if(c == 'd') glDisable(GL_DEPTH_TEST); if(c == '0') glEnable(GL_LIGHT0); if(c == '=') glDisable(GL_LIGHT0); } // tipka void strelice(int c, int x, int y) { if(c == GLUT_KEY_UP) pz += 0.5; if(c == GLUT_KEY_DOWN) pz -= 0.5; if(c == GLUT_KEY_LEFT) rx -=4; if(c == GLUT_KEY_RIGHT) rx +=4; glutPostRedisplay(); } // strelice void rotiraj(void) { kut += 1; glutPostRedisplay();} // rotiraj int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB); glutInitWindowSize(640, 480); glutCreateWindow("Helikopter"); glShadeModel(GL_FLAT); glEnable(GL_DEPTH_TEST); glClearColor(0.0, 0.0, 0.0, 0.0); glEnable(GL_LIGHTING); // omogućava osvjetljenje glEnable(GL_LIGHT0); // uključuje svjetlo 0 glutDisplayFunc(iscrtaj); glutReshapeFunc(skaliraj); glutKeyboardFunc(tipka); glutSpecialFunc(strelice); glutIdleFunc(rotiraj); glutMainLoop(); return 0; } // main