Reporte Práctica 4.

1. Describa la ventajas y desventaja de construir de manera jerárquica escenas


Dentro de las ventahas esta de que los efectos sobre objetos relacionados se propaguen automáticamente a través de ciertos grupos. Esté método (jerárquico) es muy útil cuando se asocia a transformaciones geométricas ya que sería demasiado complicado rotar, trasladar y escalar una y otra vez algunos objetos que están relacionados, en vez de esto es más fácil encontrar la relación que existe entre dichos objetos y solo tener que hacer pocas transformaciones para lograr los resultados deseados.

2. Escriba un programa que construya de manera jerárquica una escena en la que haya 3 humanoides.

void init(void){

glClearColor (0.0, 0.0, 0.0, 0.0);

glShadeModel (GL_FLAT);

}

void cubohum(void){

glBegin(GL_LINE_LOOP);

glVertex3f(0.5,0.5,0.5);

glVertex3f(-0.5,0.5,0.5);

glVertex3f(-0.5,-0.5,0.5);

glVertex3f(0.5,-0.5,0.5);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f(-0.5,0.5,-0.5);

glVertex3f( 0.5,0.5,-0.5);

glVertex3f(0.5,-0.5,-0.5);

glVertex3f(-0.5,-0.5,-0.5);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f(-0.5,0.5,0.5);

glVertex3f(-0.5,0.5,-0.5);

glVertex3f(-0.5,-0.5,-0.5);

glVertex3f(-0.5,-0.5,0.5);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f(0.5,0.5,0.5);

glVertex3f(0.5,-0.5,0.5);

glVertex3f( 0.5,-0.5,-0.5);

glVertex3f(0.5,0.5,-0.5);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f(-0.5,0.5,-0.5);

glVertex3f(-0.5,0.5,0.5);

glVertex3f(0.5,0.5,0.5);

glVertex3f( 0.5,0.5,-0.5);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f(0.5,-0.5,-0.5);

glVertex3f(-0.5,-0.5,-0.5);

glVertex3f(-0.5,-0.5,0.5);

glVertex3f(0.5,-0.5,0.5);

glEnd();

}

void torso (int posx,int posy,int posz){

glTranslatef(0.0,1.5,0.0);

glScalef (0.5, 0.5, 0.5);

glRotatef(posx,1.0,0.0,0.0);

glRotatef(posy,0.0,1.0,0.0);

glRotatef(posz,0.0,0.0,1.0);

glTranslatef(0.0,0.0,0.0);

glPushMatrix();

glScalef (2.0, 3.0, 1.0);

cubohum();

glPopMatrix();

}

void rostro (int cuey){

glPushMatrix();

glRotatef(cuey,0.0,1.0,0.0);

glTranslatef(0.0,2.0,0.0);

cubohum();

glPopMatrix();

}

void brazoder (int hombrodx,int hombrody,int hombrodz,int cododz){

glPushMatrix();

glTranslatef(1.0,1.0,0.0);

glRotatef(hombrodx,1.0,0.0,0.0);

glRotatef(hombrody,0.0,1.0,0.0);

glRotatef(hombrodz,0.0,0.0,1.0);

glTranslatef(1.0,0.25,0.0);

glPushMatrix();

glScalef(2.0,0.5,1.0);

cubohum();

glPopMatrix();

glTranslatef(1.0,0.0,0.0);

glRotatef(cododz,0.0,0.0,1.0);

glTranslatef(1.0,0.0,0.0);

glPushMatrix();

glScalef(2.0,1.0,1.0);

cubohum();

glPopMatrix();

glTranslatef(1.25,0.0,0.0);

glPushMatrix();

glScalef(0.5,0.5,1.0);

cubohum();

glPopMatrix();

glPopMatrix();

}

void brazoizq (int hombroix,int hombroiy,int hombroiz,int codoiz){

glPushMatrix();

glTranslatef(-1.0,1.0,0.0);

glRotatef(hombroix,1.0,0.0,0.0);

glRotatef(hombroiy,0.0,1.0,0.0);

glRotatef(hombroiz,0.0,0.0,1.0);

glTranslatef(-1.0,0.25,0.0);

glPushMatrix();

glScalef(2.0,0.5,1.0);

cubohum();

glPopMatrix();

glTranslatef(-1.0,0.0,0.0);

glRotatef(codoiz,0.0,0.0,1.0);

glTranslatef(-1.0,0.0,0.0);

glPushMatrix();

glScalef(2.0,1.0,1.0);

cubohum();

glPopMatrix();

glTranslatef(-1.25,0.0,0.0);

glPushMatrix();

glScalef(0.5,0.5,1.0);

cubohum();

glPopMatrix();

glPopMatrix();

}

void piernader(int muslodx,int muslody,int muslodz,int rodilladx,int piedy){

glPushMatrix();

glTranslatef(0.665,-1.5,0.0);

glRotatef(muslodx,1.0,0.0,0.0);

glRotatef(muslody,0.0,1.0,0.0);

glRotatef(muslodz,0.0,0.0,1.0);

glTranslatef(0.0,-1.2,0.0);

glPushMatrix();

glScalef(0.68,2.4,1.0);

cubohum();

glPopMatrix();

glTranslatef(0.0,-1.2,0.0);

glRotatef(rodilladx,1.0,0.0,0.0);

glTranslatef(0.0,-1.2,0.0);

glPushMatrix();

glScalef(1.0,2.4,1.0);

cubohum();

glPopMatrix();

glTranslatef(0.0,0.-1.25,0.0);

glRotatef(piedy,0.0,1.0,0.0);

glTranslatef(0.25,-0.35,0.0);

glPushMatrix();

glScalef(1.5,0.75,1.0);

cubohum();

glPopMatrix();

glPopMatrix();

}

void piernaizq(int musloix,int musloiy,int musloiz,int rodillaix,int pieiy){

glPushMatrix();

glTranslatef(-0.665,-1.5,0.0);

glRotatef(musloix,1.0,0.0,0.0);

glRotatef(musloiy,0.0,1.0,0.0);

glRotatef(musloiz,0.0,0.0,1.0);

glTranslatef(0.0,-1.2,0.0);

glPushMatrix();

glScalef(0.68,2.4,1.0);

cubohum();

glPopMatrix();

glTranslatef(0.0,-1.2,0.0);

glRotatef(rodillaix,1.0,0.0,0.0);

glTranslatef(0.0,-1.2,0.0);

glPushMatrix();

glScalef(1.0,2.4,1.0);

cubohum();

glPopMatrix();

glTranslatef(0.0,0.-1.25,0.0);

glRotatef(pieiy,0.0,1.0,0.0);

glTranslatef(-0.25,-0.35,0.0);

glPushMatrix();

glScalef(1.5,0.75,1.0);

cubohum();

glPopMatrix();

glPopMatrix();

}

void humanoides (int px,int py,int pz,int cy,int hdx,int hdy,int hdz,int cdz,int hix,

int hiy,int hiz,int ciz,int mdx,int mdy,int mdz,int rdx,

int pdy,int mix,int miy,int miz,int rix,int piy)

{

torso(px,py,pz);

rostro(cy);

brazoder(hdx,hdy,hdz,cdz);

brazoizq(hix,hiy,hiz,ciz);

piernader(mdx,mdy,mdz,rdx,pdy);

piernaizq(mix,miy,miz,rix,piy);

}

/*Aqui se colocan los tres humanoides*/

void display(void){

glClear (GL_COLOR_BUFFER_BIT);

glColor3f (1.0, 1.0, 1.0);

glLoadIdentity ();

gluLookAt (0.0,0.0,10.0,0.0, 0.0, 0.0, 0.0, 1.0, 0.0);

glPushMatrix();

glScalef(0.5,0.5,0.5);

glRotatef(-45,0.0,1.0,0.0);

glTranslatef(5.0,0.0,2.0);

humanoides(posicionx,posiciony,posicionz,cuelloy,hombroderx,hombrodery,hombroderz,cododerz,

hombroizqx,hombroizqy,hombroizqz,codoizqz,musloderx,muslodery,musloderz,rodilladerx,

piedery,musloizqx,musloizqy,musloizqz,rodillaizqx,pieizqy);

glPopMatrix();

glPushMatrix();

glTranslatef(1.0,1.0,1.0);

glRotatef(15,1.0,0.0,0.0);

glScalef(0.5,-1.5,0.8);

humanoides(posicionx,posiciony,posicionz,cuelloy,hombroderx,hombrodery,hombroderz,cododerz,

hombroizqx,hombroizqy,hombroizqz,codoizqz,musloderx,muslodery,musloderz,rodilladerx,

piedery,musloizqx,musloizqy,musloizqz,rodillaizqx,pieizqy);

glPopMatrix();

glPushMatrix();

glRotatef(20,0.0,1.0,0.0);

glTranslatef(-2.0,-1.0,-3.0);

humanoides(posicionx,posiciony,posicionz,cuelloy,hombroderx,hombrodery,hombroderz,cododerz,

hombroizqx,hombroizqy,hombroizqz,codoizqz,musloderx,muslodery,musloderz,rodilladerx,

piedery,musloizqx,musloizqy,musloizqz,rodillaizqx,pieizqy);

glPopMatrix();

glFlush ();

}

void reshape (int w, int h){

glViewport (0, 0, (GLsizei) w, (GLsizei) h);

glMatrixMode (GL_PROJECTION);

glLoadIdentity ();

glFrustum (-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);

glMatrixMode (GL_MODELVIEW);

}

int main(int argc, char** argv){

glutInit(&argc, argv);

glutInitDisplayMode (GLUT_SINGLE GLUT_RGB);

glutInitWindowSize (800, 800);

glutInitWindowPosition (90, 90);

glutCreateWindow (argv[0]);

init ();

glutDisplayFunc(display);

glutReshapeFunc(reshape);

glutKeyboardFunc(keyboard);

glutMainLoop();

return 0;