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/****************************************************************************
A simple GLUT program using the GLUI User Interface Library
This program sets up a checkbox and a spinner, both with live variables.
No callbacks are used.
-----------------------------------------------------------------------
9/9/98 Paul Rademacher (rademach@cs.unc.edu)
****************************************************************************/
#include
<string.h>
#include
<GL/glut.h>
#include
<GL/glui.h>
/** These are the live variables passed into GLUI ***/
int
wireframe = 0;
int
segments = 8;
int
main_window;
/***************************************** myGlutIdle() ***********/
void
myGlutIdle( void )
{
/* According to the GLUT specification, the current window is
undefined during an idle callback. So we need to explicitly change
it if necessary */
if ( glutGetWindow() != main_window )
glutSetWindow(main_window);
glutPostRedisplay();
}
/**************************************** myGlutReshape() *************/
void
myGlutReshape( int x, int y )
{
float xy_aspect;
xy_aspect = (
float)x / (float)y;
glViewport( 0, 0, x, y );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -xy_aspect*.08, xy_aspect*.08, -.08, .08, .1, 15.0 );
glutPostRedisplay();
}
/***************************************** myGlutDisplay() *****************/
void
myGlutDisplay( void )
{
static float rotationX = 0.0, rotationY = 0.0;
glClearColor( .9f, .9f, .9f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
/*** Rotate the object ***/
rotationX += 3.3f;
rotationY += 4.7f;
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -1.0 );
glRotatef( rotationY, 0.0, 1.0, 0.0 );
glRotatef( rotationX, 1.0, 0.0, 0.0 );
/*** Now we render object, using the variables 'segments' and
'wireframe'. These are _live_ variables, which are transparently
updated by GLUI ***/
if ( wireframe )
glutWireTorus( .2,.5,16,segments );
else
glutSolidTorus( .2,.5,16,segments );
glutSwapBuffers();
}
/**************************************** main() ********************/
void
main(int argc, char* argv[])
{
/****************************************/
/* Initialize GLUT and create window */
/****************************************/
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
glutInitWindowPosition( 50, 50 );
glutInitWindowSize( 300, 300 );
main_window = glutCreateWindow(
"GLUI Example 1" );
glutDisplayFunc( myGlutDisplay );
glutReshapeFunc( myGlutReshape );
/****************************************/
/* Set up OpenGL lights */
/****************************************/
GLfloat light0_ambient[] = {0.1f, 0.1f, 0.3f, 1.0f};
GLfloat light0_diffuse[] = {.6f, .6f, 1.0f, 1.0f};
GLfloat light0_position[] = {1.0f, 1.0f, 1.0f, 0.0f};
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
/****************************************/
/* Enable z-buferring */
/****************************************/
glEnable(GL_DEPTH_TEST);
/****************************************/
/* Here's the GLUI code */
/****************************************/
GLUI *glui = GLUI_Master.create_glui(
"GLUI" );
glui->add_checkbox(
"Wireframe", &wireframe );
GLUI_Spinner *segment_spinner =
glui->add_spinner(
"Segments:", GLUI_SPINNER_INT, &segments );
segment_spinner->set_int_limits( 3, 60 );
glui->set_main_gfx_window( main_window );
/* We register the idle callback with GLUI, *not* with GLUT */
GLUI_Master.set_glutIdleFunc( myGlutIdle );
glutMainLoop();
}
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