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added timekeeping and rotating orange quad by time

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Josh Holtrop 2010-11-24 14:41:13 -05:00
parent 8551a3800d
commit 79df97d192
1 changed files with 27 additions and 0 deletions
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dwss.cc
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@ -28,6 +28,7 @@
#include <stdlib.h>
#include <sysexits.h>
#include <time.h>
#include <sys/time.h>
#include <glib.h>
#include <glib/gi18n.h>
@ -40,6 +41,7 @@
#include <gtk/gtkgl.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "gs-theme-window.h"
@ -52,6 +54,16 @@ static GOptionEntry options[] = {
{NULL}
};
static uint64_t start_msec;
static uint32_t getElapsedTime()
{
struct timeval tv;
gettimeofday(&tv, NULL);
uint64_t msec = tv.tv_sec + tv.tv_usec / 1000;
return msec - start_msec;
}
static gboolean
expose (GtkWidget *da, GdkEventExpose *event, gpointer user_data)
{
@ -63,6 +75,10 @@ expose (GtkWidget *da, GdkEventExpose *event, gpointer user_data)
g_assert_not_reached();
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(getElapsedTime()/1000.0*360.0, 0, 0, 1);
glBegin(GL_QUADS);
glColor3f(1, 0.6, 0);
glNormal3f(0, 0, 1);
@ -71,6 +87,7 @@ expose (GtkWidget *da, GdkEventExpose *event, gpointer user_data)
glVertex2f(-1, -1);
glVertex2f(1, 0);
glEnd();
glPopMatrix();
if (gdk_gl_drawable_is_double_buffered(gldrawable))
gdk_gl_drawable_swap_buffers(gldrawable);
@ -97,8 +114,14 @@ configure (GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0,
(double)da->allocation.width / (double)da->allocation.height,
0.001,
1000.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0, 0, -2);
glShadeModel(GL_SMOOTH);
@ -182,6 +205,10 @@ main (int argc,
gtk_timeout_add(12, update, NULL);
struct timeval tv;
gettimeofday(&tv, NULL);
start_msec = tv.tv_sec + tv.tv_usec / 1000;
gtk_main ();
return EX_OK;