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/*
* main for exhibiting differnt join styles
*
* FUNCTION:
* This demo demonstrates the various join styles,
* and how they get applied.
*
* HISTORY:
* Linas Vepstas March 1995
* Copyright (c) 1995 Linas Vepstas <linas@linas.org>
*/
/* required include files */
#include <stdlib.h>
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/gle.h>
#include "main.h"
float lastx=0;
float lasty=0;
/* get notified of mouse motions */
static void
MouseMotion (int x, int y)
{
lastx = x;
lasty = y;
glutPostRedisplay ();
}
static void
JoinStyle (int msg)
{
int style;
/* get the current joint style */
style = gleGetJoinStyle ();
/* there are four different join styles,
* and two different normal vector styles */
switch (msg) {
case 0:
style &= ~TUBE_JN_MASK;
style |= TUBE_JN_RAW;
break;
case 1:
style &= ~TUBE_JN_MASK;
style |= TUBE_JN_ANGLE;
break;
case 2:
style &= ~TUBE_JN_MASK;
style |= TUBE_JN_CUT;
break;
case 3:
style &= ~TUBE_JN_MASK;
style |= TUBE_JN_ROUND;
break;
case 20:
style &= ~TUBE_NORM_MASK;
style |= TUBE_NORM_FACET;
break;
case 21:
style &= ~TUBE_NORM_MASK;
style |= TUBE_NORM_EDGE;
break;
case 99:
exit (0);
default:
break;
}
gleSetJoinStyle (style);
glutPostRedisplay ();
}
/* set up a light */
GLfloat lightOnePosition[] = {40.0, 40, 100.0, 0.0};
GLfloat lightOneColor[] = {0.99, 0.99, 0.99, 1.0};
GLfloat lightTwoPosition[] = {-40.0, 40, 100.0, 0.0};
GLfloat lightTwoColor[] = {0.99, 0.99, 0.99, 1.0};
int
main (int argc, char * argv[])
{
/* initialize glut */
glutInit (&argc, argv);
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutCreateWindow ("join styles");
glutDisplayFunc (DrawStuff);
glutMotionFunc (MouseMotion);
/* create popup menu */
glutCreateMenu (JoinStyle);
glutAddMenuEntry ("Raw Join Style", 0);
glutAddMenuEntry ("Angle Join Style", 1);
glutAddMenuEntry ("Cut Join Style", 2);
glutAddMenuEntry ("Round Join Style", 3);
glutAddMenuEntry ("------------------", 9999);
glutAddMenuEntry ("Facet Normal Vectors", 20);
glutAddMenuEntry ("Edge Normal Vectors", 21);
glutAddMenuEntry ("------------------", 9999);
glutAddMenuEntry ("Exit", 99);
glutAttachMenu (GLUT_MIDDLE_BUTTON);
/* initialize GL */
glClearDepth (1.0);
glEnable (GL_DEPTH_TEST);
glClearColor (0.0, 0.0, 0.0, 0.0);
glShadeModel (GL_SMOOTH);
glMatrixMode (GL_PROJECTION);
/* roughly, measured in centimeters */
glFrustum (-9.0, 9.0, -9.0, 9.0, 50.0, 150.0);
glMatrixMode(GL_MODELVIEW);
/* initialize lighting */
glLightfv (GL_LIGHT0, GL_POSITION, lightOnePosition);
glLightfv (GL_LIGHT0, GL_DIFFUSE, lightOneColor);
glEnable (GL_LIGHT0);
glLightfv (GL_LIGHT1, GL_POSITION, lightTwoPosition);
glLightfv (GL_LIGHT1, GL_DIFFUSE, lightTwoColor);
glEnable (GL_LIGHT1);
glEnable (GL_LIGHTING);
glEnable (GL_NORMALIZE);
glColorMaterial (GL_FRONT_AND_BACK, GL_DIFFUSE);
glEnable (GL_COLOR_MATERIAL);
InitStuff ();
glutMainLoop ();
return 0; /* ANSI C requires main to return int. */
}
/* ------------------ end of file -------------------- */
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