[Solved] Camera view messed up?

panto · Post by **panto** » Sun Mar 20, 2011 4:38 pm

I'm trying to create a camera by writing this before the main loop.

ICameraSceneNode *cam;
cam = sceneManager->addCameraSceneNode();

It does create the camera.. however, the camera only displays half of the screen. The upper half is completely gray. Why is this so?

Radikalizm · Post by **Radikalizm** » Sun Mar 20, 2011 4:38 pm

Well, what are you trying to display on-screen? Can you provide a screenshot of wat your output is?

panto · Post by **panto** » Sun Mar 20, 2011 4:50 pm

I've traced the error to these lines:

Code: Select all

	vector3df rootPos = rootNode->getPosition();
	camera->setTarget( rootPos );
	camera->setPosition( rootPos + offset );
	rootNode->setRotation( vector3df( 0, cameraDirection, 0 ) );

If I uncomment those lines of codes, then there's no graphical glitches. Btw, even if "camera" is not the actual active camera, the output is glitched.. I can't see anything wrong with those lines?

Radikalizm · Post by **Radikalizm** » Sun Mar 20, 2011 4:54 pm

Again, could you provide a screenshot and could you tell what you are trying to draw? We can't magically predict what's wrong with your application

panto · Post by **panto** » Sun Mar 20, 2011 4:58 pm

Click me!

All I'm drawing is a IAnimatedMesh and a ILight.

Sylence · Post by **Sylence** » Sun Mar 20, 2011 5:00 pm

This is called 'background'

The grey area is just the color you specify in beginScene(). If you don't want it to be grey you either have to use a different color for clearing the color buffer or draw something into it like a skybox.

panto · Post by **panto** » Sun Mar 20, 2011 5:08 pm

When I comment that snippet of code, then it renders fine...

This is what I exactly do.

1) Create "Player" class before main loop.
2) In the main loop, I call player->Rotate(), which is basically this:

Code: Select all

//offset is a vector3df.
//cameraDirection is f32.

	vector3df rootPos = rootNode->getPosition();
	camera->setTarget( rootPos );
	camera->setPosition( rootPos + offset );
	rootNode->setRotation( vector3df( 0, cameraDirection, 0 ) );

Now.. even if the "camera" which is in player->Rotate() function ISN'T the currently active camera, I still get those glitches.

After some rotation.

Radikalizm · Post by **Radikalizm** » Sun Mar 20, 2011 5:13 pm

What does your complete drawing loop look like? Do you have any problems running any examples provided by irrlicht, or do the glitches disappear when using a different video driver?

Could you maybe provide a minimal compilable codesample which reproduces the problem?

panto · Post by **panto** » Sun Mar 20, 2011 5:46 pm

I tried to reproduce it, but I can't. It seems the problems root is deeper within my code.. :/

Here's what I'm basically doing, though. (pastebin links).
main.cpp
BugCulprit.h
BugCulprit.cpp

Radikalizm · Post by **Radikalizm** » Sun Mar 20, 2011 5:54 pm

I don't see anything wrong with your code after a quick look

Do these problems occur when running in OpenGL?

panto · Post by **panto** » Sun Mar 20, 2011 5:57 pm

Yeah, and then the FPS also drops drastically for some reason.

Radikalizm · Post by **Radikalizm** » Sun Mar 20, 2011 6:07 pm

Maybe this could be a driver error? Your code seems fine to me (although it'd be a good idea to clamp your Y-rotation to a maximum of 360.f to maintain precision), unless I'm overlooking something major