CCRenderTexture

[Vladutzz]

Hey,

I'm having a problem using the CCRenderTexture class.
I am trying to get my game background, which is loaded on every level and stays the same.
What i am trying to achieve is
- on load, call begin on the renderTexture object
- render a sprite by calling [someImageSprite visit]
- [renderTexture end]
- draw the rendered sprite on screen by adding the renderTexture on the layer.

All i get is a big black square -- Nothing rendered. In some cases i get like a small portion of my sprite (which is 480 x 320), something like 10x10, streched onto the entire screen.
Sprite dimensions are fine, renderTexture size is fine also.

Any ideas on what i might be doing wrong?
PS: not very much documentation on CCRenderTexture on the web either

[Vladutzz]

This is the code:

	// Create a render texture that is the size of the background asset
	CCSprite *backGroundSprite = [CCSprite spriteWithFile:@"bg_default.png"];
	CCRenderTexture *textureRenderer = [[CCRenderTexture renderTextureWithWidth:backGroundSprite.contentSize.width height:backGroundSprite.contentSize.height] retain];
	[textureRenderer setPosition:ccp(240, 160)];
	textureRenderer.sprite = backGroundSprite;
	[[textureRenderer sprite] setBlendFunc:(ccBlendFunc){GL_ONE, GL_ONE_MINUS_SRC_ALPHA}];
	// Everything between [textureRenderer begin] and [textureRenderer end]
	// will render into our renderTexture
	[textureRenderer begin];
	[backGroundSprite visit];
	[textureRenderer end];
	[self addChild:textureRenderer z:SW_Z_ORDER_TERRAIN];

[Vladutzz]

I've done some progression.
The sprite i am trying to render is 480x320 (landscape).
If i set scale for the spriteObject to an extremly small value, something like

[backGroundSprite setScale:0.005];

the rendering works correctly, the whole image loads, however i can't make it to fit the screen as it's supposed to, due to resizinng.

If anyone has ever encountered this, i would like to know how the rendering is done, regarding to how the images are scaled when rendered.
Thanks.

[ziip]

Originally Posted by Vladutzz

I've done some progression.
The sprite i am trying to render is 480x320 (landscape).
If i set scale for the spriteObject to an extremly small value, something like

[backGroundSprite setScale:0.005];

the rendering works correctly, the whole image loads, however i can't make it to fit the screen as it's supposed to, due to resizinng.

If anyone has ever encountered this, i would like to know how the rendering is done, regarding to how the images are scaled when rendered.
Thanks.

When you want to draw in new thread you should setup projection matrix and matrix mode. So try this:

[EAGLContext setCurrentContext:context] 
[[CCDirector sharedDirector] setGLDefaultValues];