/* NURB curve (1-dimension)

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

#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
#include "tw.h"
#include <math.h>

//specify all control points here
twTriple points[15] = {
  {-3.5,0,0},{-3,0,-1}, {-2,0,0}, {-1,0,-3}, {0,0,-4}, 
  {1,0,-4}, {2,0,3}, {3,0,-2}, {4,0,0}, {3.5,0,1}, {3,0,2}, {2,0,3},
  {1,0,-1}, {0,0,-3}, {-1.5,0,2},
};

void drawCurve(twTriple* p, int numPoints, int color) {
  int i;
  glMap1f(GL_MAP1_VERTEX_3,0,1,3,numPoints,(const GLfloat*) p);
  twColorName(color);
  glBegin(GL_LINE_STRIP);
  for(i=0; i<=30; i++) glEvalCoord1f((GLfloat)i/30.0);
  glEnd();

  //  glMap1f(GL_MAP1_VERTEX_3,0,1,3,15,(const GLfloat*)&points2[0]);
}

void display(void) {
    int i, j;
    glClearColor(1,1,1,1);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    twCamera();

    //placemat
    glPushMatrix();
    glTranslatef(0,-4.03,0);
    twTriple matColor = {0,0.6,0.3};
    twColor(matColor,0,5);
    glBegin(GL_POLYGON);
    glVertex3f(-10,0,7);
    glVertex3f(-10,0,-7);
    glVertex3f(10,0,-7);
    glVertex3f(10,0,7);
    glEnd();
    glPopMatrix();
   
    glPushMatrix();
    glRotatef(90,1,0,0);
    twTriple bowlColor = {0.4,0.4,0.8};
    twColor(bowlColor,0.5,128.0);
    twCylinder(6,4,4,30,30);
    glTranslatef(0,0,4);
    twDisk(0,4,30,30);
    glPopMatrix();

    glLineWidth(2);
    glPushMatrix();
    glTranslatef(0,-3.8,0);
    for(i=0; i<6; i++) {
      glRotatef(0.5,0,1,0);
      glTranslatef(0,0.2,0);
      for (j=0; j < 5; j++) {
        drawCurve(&points[0],15,TW_OLIVE); 
        glRotatef(3,0,1,0);
      }
    }
    glPopMatrix();
    glFlush();
    glutSwapBuffers(); 
}

void myInit() {
  glEnable(GL_MAP1_VERTEX_3);
  //lighting
  twAmbient(0.6);
  GLfloat lightPosition[] = {4,4,4,0};
  glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
  glEnable(GL_LIGHTING);
  glEnable(GL_LIGHT0);
}

int main(int argc, char **argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    twInitWindowSize(650, 650);
    twBoundingBox(-5,5,-5,10,-5,5);
    glutCreateWindow("NURBS!");
    glutDisplayFunc(display);
    twMainInit();
    myInit();
    glutMainLoop();
    return 0;
}