Disappearing SPTextField with addition of custom display object

clam61

I have a custom display object (extends SPDisplayObject and uses OpenGL to draw geometric shapes) and sometimes when I add it to the stage, one of my SPTextField's already on stage will dissappear.

Even if the custom display object is removed, the SPTextField will still be gone.

Am I not overriding a function in SPDisplayObject that needs to be overriden?

clam61

bump

Shilo

I'm guessing it's a blending issue or one of the render states are left on/off. May I see your render method?

clam61

Hey Shilo

Thanks for trying to help.

So in the constructor I initialize a member variable:

_baseEffect = [[SPBaseEffect alloc] init];

then my render function is this:

- (void)render:(SPRenderSupport *)support
{
    [support finishQuadBatch]; // finish previously batched quads
    [support addDrawCalls:1]; // update stats display

    _baseEffect.mvpMatrix = support.mvpMatrix;
    _baseEffect.alpha = support.alpha;

    [SPBlendMode applyBlendFactorsForBlendMode:support.blendMode
                            premultipliedAlpha:NO];

    //get the frame definition for the current frame
    ArchiveableFrameDefinition *frame = [[_movie frames] objectAtIndex:_currentFrame];

    //render the placed objects at this frame
    [self renderPlacedObjects:frame.placedObjects];

}

In the renderPlacedObjects function is where I calculate triangles for primitive openGL drawing. Right before I call buffer and draw commands I do call:

[_baseEffect prepareToDraw];

I believe I got the _baseEffect and other stuff from a sample provided by Daniel or maybe even you! I don't know what that stuff does.

Shilo

I don't notice anything out of the ordinary. Maybe you might need to call [support finishQuadBatch] at the end of the render method to fix the issue.

If you want further help, you may PM me the project or a sample of the issue and I will have a look when I get time.

Daniel

You know the wiki article that shows how to create a custom display object, right?

http://wiki.sparrow-framework.org/manual/custom_display_objects

What I did notice when skimming over your code is that you call "[_baseEffect prepareToDraw]" directly within the render method, while I think it should. That method uploads the mvp Matrix and sets the correct texture.