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-rw-r--r--progs/demos/arbocclude.c213
1 files changed, 108 insertions, 105 deletions
diff --git a/progs/demos/arbocclude.c b/progs/demos/arbocclude.c
index f669a1f26b..cc787eeb8a 100644
--- a/progs/demos/arbocclude.c
+++ b/progs/demos/arbocclude.c
@@ -32,11 +32,12 @@
#include <GL/glew.h>
#include <GL/glut.h>
-#define TEST_DISPLAY_LISTS 0
+#define NUM_OCC 10
static GLboolean Anim = GL_TRUE;
-static GLfloat Xpos = 0;
-static GLuint OccQuery;
+static GLfloat Xpos[NUM_OCC], Ypos[NUM_OCC];
+static GLfloat Sign[NUM_OCC];
+static GLuint OccQuery[NUM_OCC];
static GLint Win = 0;
@@ -54,38 +55,43 @@ PrintString(const char *s)
static void Idle(void)
{
static int lastTime = 0;
- static int sign = +1;
int time = glutGet(GLUT_ELAPSED_TIME);
float step;
+ int i;
if (lastTime == 0)
lastTime = time;
else if (time - lastTime < 20) /* 50Hz update */
return;
- step = (time - lastTime) / 1000.0 * sign;
- lastTime = time;
+ for (i = 0; i < NUM_OCC; i++) {
- Xpos += step;
+ step = (time - lastTime) / 1000.0 * Sign[i];
+
+ Xpos[i] += step;
+
+ if (Xpos[i] > 2.5) {
+ Xpos[i] = 2.5;
+ Sign[i] = -1;
+ }
+ else if (Xpos[i] < -2.5) {
+ Xpos[i] = -2.5;
+ Sign[i] = +1;
+ }
- if (Xpos > 2.5) {
- Xpos = 2.5;
- sign = -1;
- }
- else if (Xpos < -2.5) {
- Xpos = -2.5;
- sign = +1;
}
+
+ lastTime = time;
+
glutPostRedisplay();
}
static void Display( void )
{
- GLuint passed;
- GLint ready;
- char s[100];
+ int i;
+ glClearColor(0.25, 0.25, 0.25, 0.0);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glMatrixMode( GL_PROJECTION );
@@ -96,97 +102,84 @@ static void Display( void )
glTranslatef( 0.0, 0.0, -15.0 );
/* draw the occluding polygons */
- glColor3f(0, 0.6, 0.8);
+ glColor3f(0, 0.4, 0.6);
glBegin(GL_QUADS);
- glVertex2f(-1.6, -1.5);
- glVertex2f(-0.4, -1.5);
- glVertex2f(-0.4, 1.5);
- glVertex2f(-1.6, 1.5);
-
- glVertex2f( 0.4, -1.5);
- glVertex2f( 1.6, -1.5);
- glVertex2f( 1.6, 1.5);
- glVertex2f( 0.4, 1.5);
+ glVertex2f(-1.6, -2.5);
+ glVertex2f(-0.4, -2.5);
+ glVertex2f(-0.4, 2.5);
+ glVertex2f(-1.6, 2.5);
+ glVertex2f( 0.4, -2.5);
+ glVertex2f( 1.6, -2.5);
+ glVertex2f( 1.6, 2.5);
+ glVertex2f( 0.4, 2.5);
glEnd();
- /* draw the test polygon with occlusion testing */
- glPushMatrix();
- glTranslatef(Xpos, 0, -0.5);
- glScalef(0.3, 0.3, 1.0);
- glRotatef(-90.0 * Xpos, 0, 0, 1);
-
-#if defined(GL_ARB_occlusion_query)
-#if TEST_DISPLAY_LISTS
- glNewList(10, GL_COMPILE);
- glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
- glEndList();
- glCallList(10);
-#else
- glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
-#endif
glColorMask(0, 0, 0, 0);
glDepthMask(GL_FALSE);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
+ /* draw the test polygons with occlusion testing */
+ for (i = 0; i < NUM_OCC; i++) {
+ glPushMatrix();
+ glTranslatef(Xpos[i], Ypos[i], -0.5);
+ glScalef(0.2, 0.2, 1.0);
+ glRotatef(-90.0 * Xpos[i], 0, 0, 1);
+
+ glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery[i]);
+ glBegin(GL_POLYGON);
+ glVertex3f(-1, -1, 0);
+ glVertex3f( 1, -1, 0);
+ glVertex3f( 1, 1, 0);
+ glVertex3f(-1, 1, 0);
+ glEnd();
+ glEndQueryARB(GL_SAMPLES_PASSED_ARB);
+
+ glPopMatrix();
+ }
-#if TEST_DISPLAY_LISTS
- glNewList(11, GL_COMPILE);
- glEndQueryARB(GL_SAMPLES_PASSED_ARB);
- glEndList();
- glCallList(11);
-#else
- glEndQueryARB(GL_SAMPLES_PASSED_ARB);
-#endif
-
- do {
- /* do useful work here, if any */
- glGetQueryObjectivARB(OccQuery, GL_QUERY_RESULT_AVAILABLE_ARB, &ready);
- } while (!ready);
- glGetQueryObjectuivARB(OccQuery, GL_QUERY_RESULT_ARB, &passed);
-
- /* turn off occlusion testing */
glColorMask(1, 1, 1, 1);
glDepthMask(GL_TRUE);
-#endif /* GL_ARB_occlusion_query */
-
- /* draw the orange rect, so we can see what's going on */
- glColor3f(0.8, 0.5, 0);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
- glPopMatrix();
-
-
- /* Print result message */
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-
- glColor3f(1, 1, 1);
-#if defined(GL_ARB_occlusion_query)
- sprintf(s, " %4d Fragments Visible", passed);
- glRasterPos3f(-0.50, -0.7, 0);
- PrintString(s);
- if (!passed) {
- glRasterPos3f(-0.25, -0.8, 0);
- PrintString("Fully Occluded");
+ /* Draw the rectangles now.
+ * Draw orange if result was ready
+ * Draw red if result was not ready.
+ */
+ for (i = 0; i < NUM_OCC; i++) {
+ GLuint passed;
+ GLint ready;
+
+ glGetQueryObjectivARB(OccQuery[i], GL_QUERY_RESULT_AVAILABLE_ARB, &ready);
+
+ glGetQueryObjectuivARB(OccQuery[i], GL_QUERY_RESULT_ARB, &passed);
+
+ if (!ready)
+ glColor3f(1, 0, 0);
+ else
+ glColor3f(0.8, 0.5, 0);
+
+ if (!ready || passed) {
+ glPushMatrix();
+ glTranslatef(Xpos[i], Ypos[i], -0.5);
+ glScalef(0.2, 0.2, 1.0);
+ glRotatef(-90.0 * Xpos[i], 0, 0, 1);
+
+ glBegin(GL_POLYGON);
+ glVertex3f(-1, -1, 0);
+ glVertex3f( 1, -1, 0);
+ glVertex3f( 1, 1, 0);
+ glVertex3f(-1, 1, 0);
+ glEnd();
+
+ glPopMatrix();
+ }
+
+ {
+ char s[10];
+ glRasterPos3f(0.45, Ypos[i], 1.0);
+ sprintf(s, "%4d", passed);
+ PrintString(s);
+ }
}
-#else
- glRasterPos3f(-0.25, -0.8, 0);
- PrintString("GL_ARB_occlusion_query not available at compile time");
-#endif /* GL_ARB_occlusion_query */
glutSwapBuffers();
}
@@ -222,14 +215,17 @@ static void Key( unsigned char key, int x, int y )
static void SpecialKey( int key, int x, int y )
{
const GLfloat step = 0.1;
+ int i;
(void) x;
(void) y;
switch (key) {
case GLUT_KEY_LEFT:
- Xpos -= step;
+ for (i = 0; i < NUM_OCC; i++)
+ Xpos[i] -= step;
break;
case GLUT_KEY_RIGHT:
- Xpos += step;
+ for (i = 0; i < NUM_OCC; i++)
+ Xpos[i] += step;
break;
}
glutPostRedisplay();
@@ -240,29 +236,33 @@ static void Init( void )
{
const char *ext = (const char *) glGetString(GL_EXTENSIONS);
GLint bits;
+ int i;
if (!strstr(ext, "GL_ARB_occlusion_query")) {
printf("Sorry, this demo requires the GL_ARB_occlusion_query extension\n");
exit(-1);
}
-#if defined(GL_ARB_occlusion_query)
glGetQueryivARB(GL_SAMPLES_PASSED_ARB, GL_QUERY_COUNTER_BITS_ARB, &bits);
if (!bits) {
printf("Hmmm, GL_QUERY_COUNTER_BITS_ARB is zero!\n");
exit(-1);
}
-#endif /* GL_ARB_occlusion_query */
glGetIntegerv(GL_DEPTH_BITS, &bits);
printf("Depthbits: %d\n", bits);
-#if defined(GL_ARB_occlusion_query)
- glGenQueriesARB(1, &OccQuery);
- assert(OccQuery > 0);
-#endif /* GL_ARB_occlusion_query */
+ glGenQueriesARB(NUM_OCC, OccQuery);
glEnable(GL_DEPTH_TEST);
+
+ for (i = 0; i < NUM_OCC; i++) {
+ float t = (float) i / (NUM_OCC - 1);
+ Xpos[i] = 2.5 * t;
+ Ypos[i] = 4.0 * (t - 0.5);
+ Sign[i] = 1.0;
+ }
+
}
@@ -276,7 +276,10 @@ int main( int argc, char *argv[] )
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
- glutIdleFunc( Idle );
+ if (Anim)
+ glutIdleFunc(Idle);
+ else
+ glutIdleFunc(NULL);
glutDisplayFunc( Display );
Init();
glutMainLoop();
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