/*
  filename: mmoore2-Maui.cc
  written by: maui moore
  date: 15 November 2007

  description: Palm Tree Demo with sun and global ambient lighting

*/

#include <stdio.h>
#include <math.h>
#include <tw.h>
//#include "mmoore2a.cpp"
#include <f07/objects.h>


GLfloat global_ambient[] = {0.5,0.5,0.5,1}; //high ambient because tropical!
GLfloat sun[] = {1.0,1.0,1.0,0.0};
GLfloat sun_pos[] = {15, 15,15};
GLfloat sun_spec[] = {9.0, 9.0,9.0, 0.0};
GLfloat sun_dir[] = {0, -1, 0};

twTriple palmColor1 = {0, 1.0, 0};
twTriple palmColor2 = {0, .80, .1};
twTriple palmColor3 = {.25, .75, .5};
twTriple coconutColor = {.8, .25,.35};
twTriple trunkColor = {1.0, 0.9, 0.0};
twTriple ocean_color = {.25, 1.0, .90};
twTriple sun_color = {1.0, .69, 0};

const int treeHeight = 10;
const int treeBase = 1;


void sun_light() { /* for some reason sun makes one set of palms look blue */
  twColor(sun_color,1.0, 100);
  glTranslatef(15,15,15); /* draw sphere to represent sun */
  glutSolidSphere(2,50,50 );

  glLightfv(GL_LIGHT0, GL_POSITION, sun_pos);
  glLightfv(GL_LIGHT0, GL_AMBIENT, sun);
  glLightfv(GL_LIGHT0, GL_DIFFUSE, sun);
  glLightfv(GL_LIGHT0, GL_SPECULAR, sun_spec);
  glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, sun_dir);

  glEnable(GL_LIGHT0);
}

void ambient_light() {

  glLightModelfv(GL_LIGHT_MODEL_AMBIENT, global_ambient);
  glEnable(GL_LIGHTING);
}


void display (void)
{
  
  twDisplayInit();
  twCamera();

  twColor(ocean_color,.9, 120);

  glBegin(GL_POLYGON);       //draw bottom of bounding box or floor
    {
      glNormal3f(0,1,0);
      glVertex3f(0,0,0);
      glVertex3f(15,0,0);
      glVertex3f(15,0,15);
      glVertex3f(0,0,15);
    }
    glEnd();

  mmoore2LitPalmTree(palmColor1, palmColor2,palmColor3, coconutColor, 
                      trunkColor,treeBase, treeHeight);
  ambient_light();
  sun_light();

  glFlush();
  glutSwapBuffers();
  
}

int main (int argc, char** argv) 
{
  
  /*code borrowed from Scott Anderson's Blocks.cc */
  
  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);
  twInitWindowSize(500,500);
  glutCreateWindow(argv[0]);
  glutDisplayFunc(display);
  twBoundingBox(0,15,0,15,0,15);
  twMainInit();
  glutMainLoop();
  return 0;
}