SbBool
generateTextureMap (SoNode *root, SoTexture2 *texture,
short textureWidth, short textureHeight)
{
SbViewportRegion myViewport(textureWidth, textureHeight);
SoOffscreenRenderer::Components comp = SoOffscreenRenderer::RGB;
// Render the scene
SoOffscreenRenderer *myRenderer = new SoOffscreenRenderer(myViewport);
myRenderer->setComponents(comp);
myRenderer->setBackgroundColor(SbColor(0.8, 0.8, 0.0));
if (!myRenderer->render(root)) {
delete myRenderer;
return FALSE;
}
// Generate the texture
texture->image.setValue(SbVec2s(textureWidth, textureHeight), comp,
myRenderer->getBuffer());
delete myRenderer;
return TRUE;
}
void display( void ) {
/*
* Set clear color to gray
*/
myClearColor ( 0.8, 0.8, 0.8, 0.0 );
/*
* Clear screen window
*/
myClear( GL_COLOR_BUFFER_BIT );
myLoadIdentity();
myPushMatrix();
/*
* plain old polygon test
*/
if ( (displayNumber % 4) == 1) {
/* default clipping */
myOrtho2D( -100.0, 100.0, -100.0, 100.0 );
/* default viewport */
myViewport( 0, 0, screenWidth, screenHeight );
myPushMatrix();
/* draw the polys */
drawPolys();
}
else if ( (displayNumber % 4) == 2) {
/* clipping test */
myOrtho2D( -65.0, 75.0, -80.0, 65.0 );
/* default viewport */
myViewport( 0, 0, screenWidth, screenHeight );
/* flip screen around! */
myScalef(-1.0,1.0);
myPushMatrix();
/* draw the polys */
drawPolys();
}
else if ( (displayNumber % 4) == 3) {
/* default clipping */
myOrtho2D( -100.0, 100.0, -100.0, 100.0 );
/* default viewport */
myViewport( 0, 0, screenWidth, screenHeight );
/* rotate screen */
myRotatef(15.0);
myPushMatrix();
/* draw the tranformed polys */
drawPolys();
}
else /* displayNumber == 0 */ {
/* default clipping */
myOrtho2D( -100.0, 100.0, -100.0, 100.0 );
/* default viewport */
myViewport( 0, 0, screenWidth, screenHeight );
myRotatef(-15.0);
myScalef(.5,.5);
myPushMatrix();
myRotatef(15.0);
myPushMatrix();
/* draw the tranformed polys */
drawPolys();
}
/*
* Flush GL buffers to the display
*/
glFlush( );
}
