/* Creates a ``TeddyBear'' object.  Demonstrates affine transforms,
   including nested transformations, and the new twColor convenience.

Written by Caroline Geiersbach and Scott D. Anderson
scott.anderson@acm.org
Summer 2003
*/

#include <stdio.h>
#include <GL/glut.h>
#include <tw.h>

/* Creates a bear within a 5*5*3 box */
void drawBear() {
    twTriple bodyColor = {0.8,0.5,0.3};
    twTriple headColor = {0.7,0.4,0.2};

    glPushMatrix();
  
    glTranslatef(0,3,0); // necessary to keep bear in bounding box
 
    twColor(bodyColor,0,0);
    // draw ears
    glPushMatrix();
    glTranslatef(-0.6,0.7,0.2);
    glScalef(1,1,0.5);
    glutSolidSphere(0.4,20,20);  // left ear
    glPopMatrix();
    glPushMatrix();
    glTranslatef(0.6,0.7,0.2);
    glScalef(1,1,0.5);
    glutSolidSphere(0.4,20,20);  // right ear
    glPopMatrix();

    // draw face, slightly darker brown
    twColor(headColor,0,0);
    glPushMatrix();
    glutSolidSphere(1,20,20);     // head
    glTranslatef(-0.25,0.1,0.9);
    twColorName(TW_BLACK);
    glutSolidSphere(0.12,10,10);  // left eye
    glTranslatef(0.5,0,0);
    glutSolidSphere(0.12,10,10);  // right eye
    glTranslatef(-0.25,-0.4,0);
    glutSolidSphere(0.2,10,10);   // nose
    glPopMatrix();
  
    // draw body
    twColor(bodyColor,0,0);
    glTranslatef(0,-3.8,0);
    glPushMatrix();
    glScalef(1.3,2,1);
    glutSolidSphere(1.5,20,20); // body
    glPopMatrix();
  
    // legs are in the head color
    twColor(headColor,0,0); // dark brown
    // draw right leg
    glTranslatef(0.9,-1.9,0);
    glPushMatrix();
    glRotatef(35,-1,0,1);
    twSolidCylinder(0.7,0.6,2,20,1);
    glPopMatrix();
  
    // draw left leg
    glTranslatef(-1.8,0,0);
    glPushMatrix();
    glRotatef(-35,1,0,1);
    twSolidCylinder(0.7,0.6,2,20,1); 
    glPopMatrix();
  
    // draw left arm
    glTranslatef(0,3.8,0);
    glPushMatrix();
    glRotatef(-90,0,0,1);
    twSolidCylinder(0.5,0.4,2,20,1); 
    glPopMatrix();

    // draw right arm
    glTranslatef(2,0,0);
    glPushMatrix();
    glRotatef(90,0,0,1);
    twSolidCylinder(0.5,0.4,2,20,1); 
    glPopMatrix();
    glPopMatrix();
}

void display(void) {
    twDisplayInit();
    twCamera(); // sets up camera based on bounding box coords.

    drawBear();

    glFlush();
    glutSwapBuffers();
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    twInitWindowSize(650,650);
    glutCreateWindow(argv[0]);
    twBoundingBox(-5,5,-5,5,-1.5,1.5);
    twMainInit(); 
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;
}