OpenGL screensaver.
Post: #1
I had a working one years ago. But somehow I cannot get an opengl screensaver to render anything.
Here is the code for my screensaver subclass.
This prints render over and over again and the screensaver remains black.
MyOpenGLView is a subclass of NSOpenGLView that overrides -(void)isOpaque and returns NO.
particle effect is a fully tested piece of code that does exactly what I want it to do if I run it in a SDL application, the only problem I think is something to do with how I set up the screensaver view, the opengl view or the project.
If anyone could point out what error I made that would be great.
The extra vertexes in the render function were just to see if I had set the coordinates up incorrectly. All that really needs to be there is e->render();
Here is the code for my screensaver subclass.
Code:
@implementation ButterflyCurveView
- (id)initWithFrame:(NSRect)frame isPreview:(BOOL)isPreview
{
self = [super initWithFrame:frame isPreview:isPreview];
if (self) {
NSOpenGLPixelFormatAttribute attributes[] = {
NSOpenGLPFAAccelerated,
NSOpenGLPFADepthSize, 16,
NSOpenGLPFAMinimumPolicy,
NSOpenGLPFAClosestPolicy,
0 };
NSOpenGLPixelFormat *format;
format = [[[NSOpenGLPixelFormat alloc] initWithAttributes:attributes] autorelease];
glView = [[MyOpenGLView alloc] initWithFrame:NSZeroRect pixelFormat:format];
if (!glView) {
NSLog(@"Couldn't initialize OpenGL view.");
[self autorelease];
[self setupOpenGL];
}
e = new ButterflyCurve(frame.size.width/2, frame.size.height/2);
[self setAnimationTimeInterval:1/30.0];
}
return self;
}
- (void)setupOpenGL
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
}
-(void)setFrameSize:(NSSize)newSize
{
[super setFrameSize:newSize];
[glView setFrameSize:newSize];
[[glView openGLContext] makeCurrentContext];
glViewport(0,0,(GLsizei)newSize.width,(GLsizei)newSize.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, (GLsizei)newSize.width, (GLsizei)newSize.height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
[[glView openGLContext] update];
}
- (void)startAnimation
{
[super startAnimation];
}
- (void)stopAnimation
{
[super stopAnimation];
}
- (void)drawRect:(NSRect)rect
{
[super drawRect:rect];
[[glView openGLContext] makeCurrentContext];
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
e->render();
glColor3f(1.0f, 0.0f, 0.0f);
glBegin(GL_POINTS);
glVertex2i(100, 300);
glVertex2i(200, 400);
glVertex2i(300, 500);
glVertex2i(1, 1);
glVertex2f(.5f,.5f);
glVertex2i(0, 0);
glEnd();
NSLog(@"Render");
[[glView openGLContext] flushBuffer];
}
- (void)animateOneFrame
{
e->update(1.0f/30.0f);
[self setNeedsDisplay:TRUE];
return;
}
- (BOOL)hasConfigureSheet
{
return NO;
}
- (NSWindow*)configureSheet
{
return nil;
}
- (void)dealloc
{
delete e;
[glView removeFromSuperview];
[glView release];
[super dealloc];
}
@endThis prints render over and over again and the screensaver remains black.
MyOpenGLView is a subclass of NSOpenGLView that overrides -(void)isOpaque and returns NO.
particle effect is a fully tested piece of code that does exactly what I want it to do if I run it in a SDL application, the only problem I think is something to do with how I set up the screensaver view, the opengl view or the project.
If anyone could point out what error I made that would be great.
The extra vertexes in the render function were just to see if I had set the coordinates up incorrectly. All that really needs to be there is e->render();
The machine does not run without the coin.
Post: #3(Dec 14, 2010 01:13 PM)OneSadCookie Wrote: is -setFrameSize: being called?
Yessir. Apparently it is called twice in a row every once in awhile. Not sure what that means. Both in the preview and when I hit test.
The machine does not run without the coin.
Post: #4
Found my problem.
Didn't ever add my glView to the screensaver view.
Thanks for looking
Didn't ever add my glView to the screensaver view.
Code:
[self addSubview:glView];Thanks for looking
The machine does not run without the coin.
