StackOverflow2013

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PODrawing with GLKit
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copied!<p>I am trying to write a game using opengl, but I am having a lot of trouble with the new glkit classes and the default template from iOS. </p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]; if (!self.context) { NSLog(@"Failed to create ES context"); } if(!renderer) renderer = [RenderManager sharedManager]; tiles = [[TileSet alloc]init]; GLKView *view = (GLKView *)self.view; view.context = self.context; view.drawableDepthFormat = GLKViewDrawableDepthFormat24; [self setupGL]; } - (void)setupGL { int width = [[self view] bounds].size.width; int height = [[self view] bounds].size.height; [EAGLContext setCurrentContext:self.context]; self.effect = [[GLKBaseEffect alloc] init]; self.effect.light0.enabled = GL_TRUE; self.effect.light0.diffuseColor = GLKVector4Make(0.4f, 0.4f, 0.4f, 1.0f); //Configure Buffers glGenFramebuffers(1, &framebuffer); glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); glGenRenderbuffers(2, &colourRenderBuffer); glBindRenderbuffer(GL_RENDERBUFFER, colourRenderBuffer); glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8_OES, width, height); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colourRenderBuffer); glGenRenderbuffers(3, &depthRenderBuffer); glBindRenderbuffer(GL_RENDERBUFFER, depthRenderBuffer); glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height); glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRenderBuffer); //Confirm everything happened awesomely GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER) ; if(status != GL_FRAMEBUFFER_COMPLETE) { NSLog(@"failed to make complete framebuffer object %x", status); } glEnable(GL_DEPTH_TEST); // Enable the OpenGL states we are going to be using when rendering glEnableClientState(GL_VERTEX_ARRAY); } - (void)glkView:(GLKView *)view drawInRect:(CGRect)rect { glClearColor(0.4f, 0.4f, 0.4f, 1.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); float iva[] = { 0.0,0.0,0.0, 0.0,1.0,0.0, 1.0,1.0,0.0, 1.0,0.0,0.0, }; glVertexPointer(3, GL_FLOAT, sizeof(float) * 3, iva); glDrawArrays(GL_POINTS, 0, 4); } @end </code></pre> <p>With this the buffer clears(to a grey colour), but nothing from the vertex array renders. I have no idea what to do from here and due to the age of the technology there is not much information available on how to properly use glkit.</p>

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