/*****************************************************************************
       Polyline clipping subroutine for CS480 Programming Assignment 2
******************************************************************************
    Author: 
******************************************************************************/

#include <stdio.h>
#include <math.h>
#include <gl/gl.h>
#include <gl/device.h>
#include "draw.h"

/* Write a line clipping routine based on the parametric line 
clipping algorithm described in Section 3.9.4 in the text. */

/* Here's a version of the routine that just draws the line without
doing the clipping.  Modify it to clip the line segment to the
clipping rectangle defined by (xmin,ymin) (xmax,ymax). */

clip2d(winid,x0,y0,x1,y1,xmin,ymin,xmax,ymax,color)
int winid;                 /* window id */
float x0,y0,x1,y1;         /* line segment end point coordinates */
float xmin,ymin,xmax,ymax; /* min/max of the clipping rectangle */
Colorindex color;          /* color for the line (if drawn) */
{
  float p0[2],p1[2];
  int visible = TRUE;

  
  if(visible) /* draw the line */
    {
      p0[0] = x0;
      p0[1] = y0;
      p1[0] = x1;
      p1[1] = y1;
      draw_line(winid,p0,p1,color);
    }
}