Open GL - pez en 3D

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <GL/gl.h>

#include <GL/glu.h>

#include <GL/glut.h>

int alto=800;

int ancho=800;

float zoom=1.0, tx=0.0, ty=0.0;

static void Init( void )

{

	glClearIndex( 0.0 );

   	glShadeModel( GL_FLAT );

}

static void Reshape( int width, int height )

{

	ancho=width;

	alto=height;

	glMatrixMode(GL_PROJECTION);

	glLoadIdentity();

	glViewport(0.1, 0.1, (GLint)width/2, (GLint)height/2);

   	glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

	glScalef(zoom,zoom,1.0);

        glTranslatef(tx,ty,0.0);

	glClearColor(0.0,0,0.7,0.0);

   	glClear( GL_COLOR_BUFFER_BIT );

   	glColor3f(0.0,0.0,0.0);

        glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	glCallList(2);

        		//primera figura izquierda abajo

	glMatrixMode(GL_PROJECTION);

	glLoadIdentity();

	glViewport((GLint)width/2, 0.0, (GLint)width/2, (GLint)height/2);

   	glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

	glScalef(zoom,zoom,1.0);

	glTranslatef(tx,ty,0.0);

        glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	glCallList(2);

			//segunda figura derecha abajo

	glMatrixMode(GL_PROJECTION);

	glLoadIdentity();

	glViewport(0, (GLint)width/2, (GLint)width/2, (GLint)height/2);

   	glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

	glScalef(zoom,zoom,1.0);

	glTranslatef(tx,ty,0.0);

        glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	glCallList(2);

			// tercera figura izquierda arriba

	glMatrixMode(GL_PROJECTION);

	glLoadIdentity();

	glViewport((GLint)width/2, (GLint)width/2, (GLint)width/2, (GLint)height/2);

   	glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

	glScalef(zoom,zoom,1.0);

	glTranslatef(tx,ty,0.0);

        glMatrixMode(GL_MODELVIEW);

	glLoadIdentity();

	glCallList(2);

			//cuarta figura derecha arriba

	glFlush();

}

static void Key_Esc(unsigned char key, int x, int y )

{

  	if (key==27)

      		exit(0);

  	if (key ==43){

		zoom*=1.1;

		Reshape(ancho,alto);

	}

 	if (key==45){

		zoom*=0.9;

		Reshape(ancho,alto);

	}

}

static void Special(int key, int x, int y )

{

  	if (key==GLUT_KEY_LEFT){

               	tx=tx-0.2;

               	Reshape(ancho,alto);

	}

      	if (key==GLUT_KEY_RIGHT){

		tx=tx+0.2;

		Reshape(ancho,alto);

	}

	if (key==GLUT_KEY_UP){

		ty=ty+0.2;

		Reshape(ancho,alto);

	}

	if (key==GLUT_KEY_DOWN){

		ty=ty-0.2;

		Reshape(ancho,alto);

	}

}

static void triangulo ()

{

	glNewList(1, GL_COMPILE);

		glBegin(GL_TRIANGLES);

		// Dibujamos un triángulo

		glColor3f (1.0,0.6, 0.0);

		// Color

		glVertex3f(0.0,0.0,0.0);

		// Coordenadas del primer vértice

		glVertex3f(0.0,0.4,0.0);

		// Coordenadas del segundo vértice

		glVertex3f(0.4,0.0,0.0);

		// Coordenadas del tercer vértice

                glEnd();

	glEndList();	// Terminamos de dibujar

}

static void cuadrado()

{

	glBegin(GL_QUADS);

	glColor3f (1.0,0.6, 0.0);

		//color

	glVertex3f(0.0,0.0,0.0);

	glVertex3f(0.0,0.2,0.0);

	glVertex3f(0.2,0.2,0.0);

	glVertex3f(0.2,0.0,0.0);

	glEnd();

}

void pez(){

   	glNewList(2, GL_COMPILE);

	glPushMatrix();

	glTranslatef(0.0,0.0,0.0);

	glRotatef(0.0,0.0,0.0,0.0);

	glCallList(1);

        glPopMatrix();

		// cuerpo de pez 1

	glPushMatrix();

	glRotatef(180.0,1.0,0.0,0.0);

	glCallList(1);

	glPopMatrix();

		// cuerpo de pez 2

	glPushMatrix();

	glTranslatef(0.0,0.2,0.0);

	glRotatef(180.0,0.0,1.0,0.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// ala de arriba 1

	glPushMatrix();

	glTranslatef(-0.2,0.2,0.0);

	glRotatef(180.0,1.0,0.0,0.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// ala de arriba 2

	glPushMatrix();

	glTranslatef(-0.2,-0.2,0.0);

	glRotatef(0.0,0.0,0.0,0.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// ala de abajo 1

	glPushMatrix();

	glTranslatef(0.0,-0.2,0.0);

	glRotatef(180.0,0.0,0.0,1.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// ala de abajo 2

	glPushMatrix();

	glTranslatef(-0.4,0.0,0.0);

	glRotatef(0.0,0.0,0.0,0.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// cola 1

	glPushMatrix();

	glTranslatef(-0.4,0.0,0.0);

	glRotatef(180.0,1.0,0.0,0.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// cola 2

	glPushMatrix();

	glTranslatef(0.5,0.1,0.0);

	glRotatef(45.0,0.0,0.0,1.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

		// gota 1

	glPushMatrix();

	glTranslatef(0.5,0.38,0.0);

	glRotatef(225.0,0.0,0.0,1.0);

	glScalef(0.5,0.5,0.0);

	glCallList(1);

	glPopMatrix();

   		// gota 2

	glEndList();

}

static void Display( void )

{

	Reshape(ancho,alto);

}

int main( int argc, char **argv )

{

   glutInit(&argc, argv);

   int a;

   glutInitDisplayMode( GLUT_RGB );

   glutInitWindowPosition(100,100 );

   glutInitWindowSize(800, 800 );

   glutCreateWindow("Pez con transformaciones geometricas");

   Init();

   triangulo();

   pez();

   glutReshapeFunc(Reshape);

   glutDisplayFunc(Display);

   glutKeyboardFunc(Key_Esc);

   glutSpecialFunc(Special);

   glutMainLoop( );

   return 0;

}