2014/10/15 下午 10:09:38

iphone Programming Glossary: glclearcolor

Drawing into OpenGL ES framebuffer and getting UIImage from it on iPhone

http://stackoverflow.com/questions/10936157/drawing-into-opengl-es-framebuffer-and-getting-uiimage-from-it-on-iphone

int width 256 int height 256 EAGLContext setCurrentContext myContext glEnable GL_DEPTH_TEST clear color cyan glClearColor 0.0f 1.0f 1.0f 1.0f glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT trying to draw some primitive red line float line 0.5f..

OpenGL Layer on top of Video on iPhone?

http://stackoverflow.com/questions/1204664/opengl-layer-on-top-of-video-on-iphone

How do I blend two textures with different co-ordinates in OpenGL ES 2.0 on iPhone?

http://stackoverflow.com/questions/12242443/how-do-i-blend-two-textures-with-different-co-ordinates-in-opengl-es-2-0-on-ipho

position 2 GL_FLOAT 0 0 imageVertices glVertexAttribPointer inputTextureCoordinate 2 GL_FLOAT 0 0 textureCoordinates glClearColor 0.0 0.0 0.0 0.0 glClear GL_COLOR_BUFFER_BIT glDrawArrays GL_TRIANGLE_STRIP 0 4 glBindRenderbuffer GL_RENDERBUFFER viewRenderbuffer..

iPhone: Layering a transparent openGL view on top of a UIView?

http://stackoverflow.com/questions/1394934/iphone-layering-a-transparent-opengl-view-on-top-of-a-uiview

I get a big black box. I have tried setting the background color to UIColor clearColor I've set opaque to NO I've set glClearColor to 0.0 0.0 0.0 0.0. I think I'm misunderstanding misusing something related to blend modes but I'm not sure. Can anyone.. NSDictionary dictionaryWithObjectsAndKeys kEAGLColorFormatRGBA8 kEAGLDrawablePropertyColorFormat nil glClearColor 0.0f 0.0f 0.0f 0.0f And incase you're doing what I was doing and are trying to test it with the GLGravity demo there's another.. And incase you're doing what I was doing and are trying to test it with the GLGravity demo there's another call to glClearColor 0.0f 0.0f 0.0f 1.0f every time drawView is called so make sure you change that one to glClearColor 0.0f 0.0f 0.0f 0.0f too..

Draw to offscreen renderbuffer in OpenGL ES (iPhone)

http://stackoverflow.com/questions/1853551/draw-to-offscreen-renderbuffer-in-opengl-es-iphone

GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER GL_LINEAR glTexParameterf GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER GL_LINEAR glClearColor 1.0 1.0 1.0 1.0 glViewport 0 0 512 512 glClear GL_COLOR_BUFFER_BIT setTargetToTexture function glBindFramebufferOES GL_FRAMEBUFFER_OES..

Is it possible to make an OpenGL ES layer transparent?

http://stackoverflow.com/questions/3193607/is-it-possible-to-make-an-opengl-es-layer-transparent

project template this will be in EAGLView's initWithCoder . Draw the background in a transparent color and alpha. glClearColor 0.0f 0.0f 0.0f 0.0f If you are using XCode's OpenGL project template this will be in the render methods ES1Renderer render..

Why is my EAGLVIew not rendering anymore in iOS 4.2?

http://stackoverflow.com/questions/4270320/why-is-my-eaglview-not-rendering-anymore-in-ios-4-2

that it's about the view and not the misplacing of the model by coloring the background it does not color it through glClearColor . When I double tap it it shall resize it goes fullscreen before this it is a little UIVIew calling this method void animateToGrow..

cocos2d: playing a video in the background of a menu

http://stackoverflow.com/questions/4454758/cocos2d-playing-a-video-in-the-background-of-a-menu

following line in your app delegate .h #import MediaPlayer MediaPlayer.h In CCDirector's setGLDefaultValues method set glClearColor's alpha to be 0.0f not 1.0f glClearColor 0.0f 0.0f 0.0f 1.0f glClearColor 0.0f 0.0f 0.0f 0.0f When creating your EAGLView.. MediaPlayer MediaPlayer.h In CCDirector's setGLDefaultValues method set glClearColor's alpha to be 0.0f not 1.0f glClearColor 0.0f 0.0f 0.0f 1.0f glClearColor 0.0f 0.0f 0.0f 0.0f When creating your EAGLView in applicationDidFinishLaunching change.. CCDirector's setGLDefaultValues method set glClearColor's alpha to be 0.0f not 1.0f glClearColor 0.0f 0.0f 0.0f 1.0f glClearColor 0.0f 0.0f 0.0f 0.0f When creating your EAGLView in applicationDidFinishLaunching change the following things Change the..

Displaying an EAGLView with transparent background on a UIImageView

http://stackoverflow.com/questions/5283670/displaying-an-eaglview-with-transparent-background-on-a-uiimageview

GL views at initWithCoder Plus of course in your OpenGL code you need to clear to alpha 0.0. So wherever your glClear glClearColor calls are already replace the clearColor with glClearColor 0 0 0 0.0 glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT share..

How can I crop an Image with mask and combine it with another image (background) on iPhone? (OpenGL ES 1.1 is preferred)

http://stackoverflow.com/questions/5299452/how-can-i-crop-an-image-with-mask-and-combine-it-with-another-image-background

y size glEnd void init GLdouble bounds 4 glGetDoublev GL_VIEWPORT bounds window_size 0 bounds 2 window_size 1 bounds 3 glClearColor 0.0 0.0 0.0 1.0 glShadeModel GL_SMOOTH Load our textures... color_texture NSImage imageNamed @ colors texture mask_texture..

Use of VAO around VBO in Open ES iPhone app Causes EXC_BAD_ACCESS When Call to glDrawElements

http://stackoverflow.com/questions/6240863/use-of-vao-around-vbo-in-open-es-iphone-app-causes-exc-bad-access-when-call-to-g

ubbthreads.php ubb showflat Number 287977 and then use it like this void render CADisplayLink displayLink glClearColor 0 104.0 255.0 55.0 255.0 1.0 glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT glViewport 0 0 backingWidth backingHeight directProgram..

Record the drawing as a m4v video file - OpenGL

http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl

erase EAGLContext setCurrentContext context Clear the buffer glBindFramebufferOES GL_FRAMEBUFFER_OES viewFramebuffer glClearColor 0.0 0.0 0.0 0.0 glClear GL_COLOR_BUFFER_BIT Display the buffer glBindRenderbufferOES GL_RENDERBUFFER_OES viewRenderbuffer..

Draw a straight line using OpenGL ES in iPhone?

http://stackoverflow.com/questions/9736887/draw-a-straight-line-using-opengl-es-in-iphone

rect NSLog @ DrawInRect Method EAGLContext setCurrentContext self.context This method is calling multiple times.... glClearColor 0.65f 0.65f 0.65f 1.0f glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT const GLfloat line 0.5f 0.5f point A 0.5f 0.5f point.. to the GPU to be processed. Here's my glkView drawInRect function void glkView GLKView view drawInRect CGRect rect glClearColor 0.65f 0.65f 0.65f 1.0f glClear GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT Prepare the effect for rendering self.effect prepareToDraw..