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/*
* agv_example.c (version 1.0)
*
* Example program to show how to use AGV
*
* See agviewer.h, agviewer.c and comments within for more info
*
* Philip Winston - 4/11/95
* pwinston@hmc.edu
* http://www.cs.hmc.edu/people/pwinston
*/
#include <GL/glut.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "agviewer.h"
typedef enum {NOTALLOWED, AXES, STUFF, RING } DisplayLists;
int DrawAxes = 0;
#define ROTATEINC 2;
GLfloat Rotation = 0; /* start ring flat and not spinning */
int Rotating = 0;
void myGLInit(void)
{
GLfloat mat_ambuse[] = { 0.6, 0.0, 0.0, 1.0 };
GLfloat mat_specular[] = { 0.4, 0.4, 0.4, 1.0 };
GLfloat light0_position[] = { 0.6, 0.4, 0.3, 0.0 };
glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, mat_ambuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialf(GL_FRONT, GL_SHININESS, 25.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glEnable(GL_NORMALIZE);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
glShadeModel(GL_SMOOTH);
glFlush();
}
void MakeDisplayLists(void)
{
glNewList(STUFF, GL_COMPILE);
glPushMatrix();
glutSolidCube(1.0);
glTranslatef(2, 0, 0);
glutSolidSphere(0.5, 10, 10);
glTranslatef(-2, 0, 3);
glRotatef(-90, 1, 0, 0);
glutSolidCone(0.5, 1.0, 8, 8);
glPopMatrix();
glEndList();
glNewList(RING, GL_COMPILE);
glutSolidTorus(0.1, 0.5, 8, 15);
glEndList();
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60, 1, 0.01, 100);
/* so this replaces gluLookAt or equiv */
agvViewTransform();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* we call agvMakeAxesList() to make this display list */
if (DrawAxes)
glCallList(AXES);
glCallList(STUFF);
glTranslatef(-2, 1, -2);
glRotatef(Rotation, 1, 0, 0);
glCallList(RING);
glutSwapBuffers();
glFlush();
}
/* rotate the axis and adjust position if nec. */
void rotatethering(void)
{
Rotation += ROTATEINC;
if (agvMoving) /* we since we are the only idle function, we must */
agvMove(); /* give AGV the chance to update the eye position */
glutPostRedisplay();
}
typedef enum { MENU_AXES, MENU_QUIT, MENU_RING } MenuChoices;
void handlemenu(int value)
{
switch (value) {
case MENU_AXES:
DrawAxes = !DrawAxes;
break;
case MENU_QUIT:
exit(0);
break;
case MENU_RING:
Rotating = !Rotating;
if (Rotating) {
glutIdleFunc(rotatethering); /* install our idle function */
agvSetAllowIdle(0); /* and tell AGV to not */
} else {
glutIdleFunc(NULL); /* uninstall our idle function */
agvSetAllowIdle(1); /* and tell AGV it can mess with it */
}
break;
}
glutPostRedisplay();
}
void visible(int v)
{
if (v == GLUT_VISIBLE) {
if (Rotating) {
glutIdleFunc(rotatethering);
agvSetAllowIdle(0);
} else {
glutIdleFunc(NULL);
agvSetAllowIdle(1);
}
} else {
glutIdleFunc(NULL);
agvSetAllowIdle(0);
}
}
void MenuInit(void)
{
int sub2 = glutCreateMenu(agvSwitchMoveMode); /* pass these right to */
glutAddMenuEntry("Flying move", FLYING); /* agvSwitchMoveMode() */
glutAddMenuEntry("Polar move", POLAR);
glutCreateMenu(handlemenu);
glutAddSubMenu("Movement", sub2);
glutAddMenuEntry("Toggle Axes", MENU_AXES);
glutAddMenuEntry("Toggle ring rotation", MENU_RING);
glutAddMenuEntry("Quit", MENU_QUIT);
glutAttachMenu(GLUT_RIGHT_BUTTON);
}
int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitWindowSize(512, 512);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutCreateWindow("AGV example");
glutVisibilityFunc(visible);
if (Rotating)
glutIdleFunc(rotatethering);
/*
* let AGV know if it can mess with the idle function (if we've
* just installed an idle function, we tell AGV it can't touch it)
*/
agvInit(!Rotating);
/*
* agvInit() installs mouse, motion, and keyboard handles, but
* we don't care for this example cause we only use right button menu
*/
agvMakeAxesList(AXES); /* create AGV axes */
myGLInit();
MakeDisplayLists();
MenuInit();
glutDisplayFunc(display);
glutMainLoop();
return 0; /* ANSI C requires main to return int. */
}
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