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Glclearcolor Not Working

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I'm setting up the OpenGL context with this code: //Attempts to initiate GLFW. The OpenGL view that Cocos2D draws into has a white background, but the UIWindow probably has a black or clear background. arseybee 2014-06-23 15:46:56 UTC #2 I believe you need to call glClearColor by adding it to the renderer queue: [renderer enqueueBlock:^{ glClearColor(...) } globalSortOrder:0 debugLabel:@"Set alpha only color writes." threadSafe:NO]; See So on button click I first call: GLES20.glClearColor(color[0], color[1], color[2], color[3]); Then I call: GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT); And it does nothing!

For convenience, it's displayed below. If this is an operation that could take a long time, the UI thread could not update the values, and might be stuck for a while waiting for the lock. Check the pixel format.I can't really find anything usefull about that. The default value is zero. https://www.opengl.org/discussion_boards/showthread.php/132077-glClearcolor()-problem-I-am-not-sure

Glclearcolor Color Chart

A lot. Thank U very much. What is a positive descriptor for someone that doesn't care about anything/is always neutral? Munchkin: Charity: Giving cards to someone who has 5 already Code ladder, Robbers Is there a way to block an elected President from entering office?

Not the answer you're looking for? When you use GLSurfaceView, context handling is taken care for you, so it all just magically seems to work. If you are using RENDERMODE_WHEN_DIRTY, try RENDERMODE_WHEN_CONTINUOUSLY –samgak May 7 '15 at 7:49 Yes I am using RENDERMODE_CONTINUOUSLY. –Alexanus May 7 '15 at 7:54 add a comment| 1 Answer Glclear Not Working Good thing you brought up glClear, color buffers and bits, although in a different context.

Downloads and tools Windows 10 dev tools Visual Studio Windows SDK Windows Store badges Essentials API reference (Windows apps) API reference (desktop apps) Code samples How-to guides (Windows apps) Learning resources Glclearcolor Example I don't want to do research (First year tenure-track faculty) Guaranteed time for an airline to provide luggage Can Newton's laws of motion be proved (mathematically or analytically) or are they Where do you create the window and the rendering context? The default value is zero.

EDIT: I found out a way to do it. Glclearcolor Opengl If you do have a window and it is not visible, then you have a pixel ownership problem = http://www.opengl.org/wiki/Common_Mistakes#The_Pixel_Ownership_Problem As for glColorMask, by default all the channels are enabled. However, when I put the following code after it, I'm seeing nothing different appear. Thanks...

Glclearcolor Example

This is exactly what you were attempting to do. Homepage I'm incrementing the red, green and blue variables every frame so that I can check that OpenGL is working as a whole and I see the background colour change. Glclearcolor Color Chart Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. Glclearcolor Alpha So i never call something like swapBuffers();After that i'm reading all the pixels from the back buffer with glReadPixels().

asked 5 months ago viewed 59 times active 5 months ago Related 1C++ OpenGL wireframe cube rendering blank22My game seems to be incompatible with recording software. How to prove that authentication system works, and that the customer is using the wrong password? Back to top #6 Brother Bob Moderators -Reputation: 10051 Like 0Likes Like Posted 31 January 2012 - 09:59 AM It is not related to OpenGL, but to the windowing API Back to top #7 clb Members -Reputation: 2143 Like 0Likes Like Posted 31 January 2012 - 10:00 AM glClear has a feature that it does not actually clear the color Glclearcolor Black

For example, in GLUT you need to specify the GLUT_ALPHA flag to the glutInitDisaplayMode function, and in the Windows API you need to set the cAlphaBits field of the PIXELFORMATDESCRIPTOR structure I honestly had no idea there was an entire deprecated API, I just kinda assumed all of the tutorials and stuff would work. –JamEngulfer Jun 3 at 21:53 @JamEngulfer On Tate's "Endomorphisms of Abelian Varieties over Finite Fields", sketch of proof of main result? up vote 2 down vote favorite i just new to libgdx and trying to understand the example code, the following code sets the bg color Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); Gdx.gl.glClearColor(60,181,00,0f); my expected color is

Then i use the pixels that i got from glReadPixels() and put them in another Photoshop like application which just displays everything fine. It's possible that the rendering thread uses the 3 values while the UI thread is setting them, ending up with a mix of old and new values. If any buffer clearing problem ?

Back to top #4 vivendi Members -Reputation: 123 Like 0Likes Like Posted 31 January 2012 - 09:37 AM TryglClearColor(0.0f,0.0f,0.0f,1.0f);instead?Ohh i thought transparency was set to 0.0f, but i tried it

First time visitors, please read our FAQ and our Forum Rules and Guidelines. Can Newton's laws of motion be proved (mathematically or analytically) or are they just axioms? Before you can make any OpenGL calls, an OpenGL context needs to be created, and be set as the current context. Developer resources Microsoft developer Windows Windows Dev Center Windows apps Desktop Internet of Things Games Holographic Microsoft Edge Hardware Azure Azure Web apps Mobile apps API apps Service fabric Visual Studio

Hi, My problem is when i am trying to change the background color in run time, i want to call the display function two times to made the color change.I am So if I first call glClearColor each frame before I call glClear it works. Munchkin: Charity: Giving cards to someone who has 5 already How to make a receptacle box flush with wall after it has been installed? Register now!

Is it more efficient to have many or a few rotors? In the last code fragment, also note how the color values are copied to local variables before being used. GLSurfaceView has a queueEvent() method that allows you to pass in a Runnable that will then be executed in the rendering thread. mrsippy 2014-06-23 16:16:21 UTC #5 Thanks @slembcke, I've just implemented this in my scene init method like so: [self setColor:[CCColor colorWithCcColor3b:ccc3(255, 255, 255)]]; Which does indeed work, but when I change

Then, it is just a matter of selecting a RGBA8 format instead of RGBX8 (Direct3D nomenclature). Change: glBegin(GL_LINE); glVertex2i(0, 0) ; glVertex2i(1, 1); glEnd();to glBegin(GL_LINES); glVertex2i(0, 0) ; glVertex2i(100, 100); glEnd();and it should work. The following functions retrieve information related to the glClearColor function: glGet with argument GL_ACCUM_CLEAR_VALUE glGet with argument GL_COLOR_CLEAR_VALUE Requirements Minimum supported client Windows 2000 Professional [desktop apps only] Minimum supported server Windows 2000 Why (and when) does pattern matching with f[__] perform MUCH more quickly than _f?

How can I create an image with a round globe like center? blue The blue value that glClear uses to clear the color buffers. Change the order of the two statements: first set the color, then call clear... slembcke 2014-06-23 16:52:58 UTC #6 You could shorten that a bit too if you wanted: self.color = [CCColor whiteColor]; As for the black rotation issue.

There is an alternate approach to using a lock. Instead of giving you only the solution, let me still explain what happens under the hood, to avoid future surprises. Why the switch from "ihr" to "Sie" in the following speech from Band of Brothers? There are a few more confusing things that need to be cleared up.

For example, in GLUT you need to specify the GLUT_ALPHA flag to the glutInitDisaplayMode function, and in the Windows API you need to set the cAlphaBits field of the PIXELFORMATDESCRIPTOR structure The class members involved could look like this: float mBackRed, mBackGreen, mBackBlue; boolean mBackChanged; Object mBackLock = new Object(); Then where you set the value in the UI thread: synchronized(mBackLock) { Which security measures make sense for a static web site? Forum New Posts FAQ Calendar Forum Actions Mark Forums Read Quick Links Today's Posts View Site Leaders Khronos Forums OpenGL: Getting Started Advanced Search Forum OpenGL Developers Forum OpenGL coding: beginners

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