-/* $Id: gears.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */
-
/*
* 3-D gear wheels. This program is in the public domain.
*
+ * Command line options:
+ * -info print GL implementation information
+ * -exit automatically exit after 30 seconds
+ *
+ *
* Brian Paul
*/
/* Conversion to GLUT by Mark J. Kilgard */
-/*
- * $Log: gears.c,v $
- * Revision 1.1 1999/08/19 00:55:40 jtg
- * Initial revision
- *
- * Revision 3.2 1999/06/03 17:07:36 brianp
- * an extra quad was being drawn in front and back faces
- *
- * Revision 3.1 1998/11/03 02:49:10 brianp
- * added fps output
- *
- * Revision 3.0 1998/02/14 18:42:29 brianp
- * initial rev
- *
- */
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
+#include <string.h>
#include <GL/glut.h>
#ifndef M_PI
static GLint T0 = 0;
static GLint Frames = 0;
+static GLint autoexit = 0;
+static GLint win = 0;
+static GLboolean Visible = GL_TRUE;
+static GLboolean Animate = GL_TRUE;
+static GLfloat viewDist = 40.0;
/**
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;
+static void
+cleanup(void)
+{
+ glDeleteLists(gear1, 1);
+ glDeleteLists(gear2, 1);
+ glDeleteLists(gear3, 1);
+ glutDestroyWindow(win);
+}
+
static void
draw(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
- glRotatef(view_rotx, 1.0, 0.0, 0.0);
- glRotatef(view_roty, 0.0, 1.0, 0.0);
- glRotatef(view_rotz, 0.0, 0.0, 1.0);
- glPushMatrix();
- glTranslatef(-3.0, -2.0, 0.0);
- glRotatef(angle, 0.0, 0.0, 1.0);
- glCallList(gear1);
- glPopMatrix();
+ glTranslatef(0.0, 0.0, -viewDist);
- glPushMatrix();
- glTranslatef(3.1, -2.0, 0.0);
- glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
- glCallList(gear2);
- glPopMatrix();
+ glRotatef(view_rotx, 1.0, 0.0, 0.0);
+ glRotatef(view_roty, 0.0, 1.0, 0.0);
+ glRotatef(view_rotz, 0.0, 0.0, 1.0);
- glPushMatrix();
- glTranslatef(-3.1, 4.2, 0.0);
- glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
- glCallList(gear3);
- glPopMatrix();
+ glPushMatrix();
+ glTranslatef(-3.0, -2.0, 0.0);
+ glRotatef(angle, 0.0, 0.0, 1.0);
+ glCallList(gear1);
+ glPopMatrix();
+
+ glPushMatrix();
+ glTranslatef(3.1, -2.0, 0.0);
+ glRotatef(-2.0 * angle - 9.0, 0.0, 0.0, 1.0);
+ glCallList(gear2);
+ glPopMatrix();
+
+ glPushMatrix();
+ glTranslatef(-3.1, 4.2, 0.0);
+ glRotatef(-2.0 * angle - 25.0, 0.0, 0.0, 1.0);
+ glCallList(gear3);
+ glPopMatrix();
glPopMatrix();
glutSwapBuffers();
Frames++;
+
{
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 5000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps);
- T0 = t;
- Frames = 0;
- }
+ GLint t = glutGet(GLUT_ELAPSED_TIME);
+ if (t - T0 >= 5000) {
+ GLfloat seconds = (t - T0) / 1000.0;
+ GLfloat fps = Frames / seconds;
+ printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
+ T0 = t;
+ Frames = 0;
+ if ((t >= 999.0 * autoexit) && (autoexit)) {
+ cleanup();
+ exit(0);
+ }
+ }
}
}
static void
idle(void)
{
- angle += 2.0;
+ static double t0 = -1.;
+ double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
+ if (t0 < 0.0)
+ t0 = t;
+ dt = t - t0;
+ t0 = t;
+
+ angle += 70.0 * dt; /* 70 degrees per second */
+ angle = fmod(angle, 360.0); /* prevents eventual overflow */
+
glutPostRedisplay();
}
+static void
+update_idle_func(void)
+{
+ if (Visible && Animate)
+ glutIdleFunc(idle);
+ else
+ glutIdleFunc(NULL);
+}
+
/* change view angle, exit upon ESC */
/* ARGSUSED1 */
static void
case 'Z':
view_rotz -= 5.0;
break;
+ case 'd':
+ viewDist += 1.0;
+ break;
+ case 'D':
+ viewDist -= 1.0;
+ break;
+ case 'a':
+ Animate = !Animate;
+ update_idle_func();
+ break;
case 27: /* Escape */
+ cleanup();
exit(0);
break;
default:
glLoadIdentity();
glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -40.0);
}
static void
-init(void)
+init(int argc, char *argv[])
{
- static GLfloat pos[4] =
- {5.0, 5.0, 10.0, 0.0};
- static GLfloat red[4] =
- {0.8, 0.1, 0.0, 1.0};
- static GLfloat green[4] =
- {0.0, 0.8, 0.2, 1.0};
- static GLfloat blue[4] =
- {0.2, 0.2, 1.0, 1.0};
+ static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
+ static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
+ static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
+ static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
+ GLint i;
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEndList();
glEnable(GL_NORMALIZE);
+
+ for ( i=1; i<argc; i++ ) {
+ if (strcmp(argv[i], "-info")==0) {
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+ printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
+ }
+ else if ( strcmp(argv[i], "-exit")==0) {
+ autoexit = 30;
+ printf("Auto Exit after %i seconds.\n", autoexit );
+ }
+ }
}
-void
+
+static void
visible(int vis)
{
- if (vis == GLUT_VISIBLE)
- glutIdleFunc(idle);
- else
- glutIdleFunc(NULL);
+ Visible = vis;
+ update_idle_func();
}
int main(int argc, char *argv[])
glutInitWindowPosition(0, 0);
glutInitWindowSize(300, 300);
- glutCreateWindow("Gears");
- init();
+ win = glutCreateWindow("Gears");
+ init(argc, argv);
glutDisplayFunc(draw);
glutReshapeFunc(reshape);
glutKeyboardFunc(key);
glutSpecialFunc(special);
glutVisibilityFunc(visible);
+ update_idle_func();
glutMainLoop();
return 0; /* ANSI C requires main to return int. */
projects / mesa.git / blobdiff