When I do page transition that shows the outside part of the stage (like CCTransitionFlipX), I can briefly see the sprites outside the screen while transition. It is really annoying. I thought I can manually check the position of the sprite in realtime and remove if it is off the screen. But that won't work if that sprite is partially outside. Is there something like UIKit's clipSubviews in cocos2d?
There's a ClippingNode class that might help.
Since the flip animation allows the user to see more than just the visible screen area, because the screen rotates, I think the behavior you observed may be expected.
Related
I have a game I'm currently working on, and it uses multiple views (for a minimap for example).
Thing is, I would like to have a fading effect added at some point, so I thought I'd create a black image that is the size of the screen and change its alpha value with a timer. That part is not a problem.
What happens right now is the main area (ie window default view) is fading (because the opacity of the image is increasing), but the minimap (minimap view) is unaffected. This is normal behaviour for views, but is there a way to draw an image to the whole window, regardless of the views ?
Thanks in advance
To clarify, you have the default view where you'll draw the main game, then you'll have the minimap view where you would draw the minimap. At some point in the game you want the whole screen to fade to black. It sounds like you've been trying to draw a black image on the default view (changing the alpha) to make this effect work.
So, you need a third view that you draw your black image on to get this fading effect.
After I rotate a CCLayer, my boundingBox grows, instead of rotating. Perhaps to be expected.
My issue is, I'm relying on a user touch on this layer. When the layer is rotated as in the figure on the bottom of the attached image, the clickable area increases because I'm calling:
if(CGRectContainsPoint(clickableLayer.boundingBox, touchLocation))
This causes an issue because this bounding box after rotation is covering up other things that are also clickable.
How do I only perform an action if the actual layer is touched? I want something to happen when just the green box is clicked, not the boundingBox of the layer.
Thoughts?
You can use CGMutablePathRef to detect transparent part:
Refer my answer in this thread.
Information about How to create CGPath:Here
For more information, Click Here
This thread got me to my answer: http://www.cocos2d-iphone.org/forum/topic/272336
I'm wanting to create a WoW cooldown effect where a player does some action and is not able to do the action again until the sprite is fully shown again. I have a grayed out version of the same sprite and am wanting to slowly reveal the sprite until it is fully available again. So, there will be a slow blend vertically of the gray and colored sprite.
Is there a way to do this with built in functionality with Cocos2d and CCSprite?
I'm using v2 of Cocos2d so I could write a shader which I think would be pretty easy, but before I went this route I wanted to see if there is an easier way.
Take a look to the CCProgressTimer class. If I understand right, it will make what you want
You can use CCFadeIn to animate the colored sprite over the grayed sprite :
[coloredSprite runAction:[CCFadeIn actionWithDuration:1.0f];
I have sub classed a tab control to give it a background. I have used the clipping functions to clip the drawing area to the update region. This works, except for when I move the window of the screen and back again.
When it does this, it occasionally sets the clipping region to the whole screen. This is fine except that none of the controls redraw and end up hidden behind the background. How do I know whether or not to redraw the background when I get this update region. It would be 100x easier to develop this if I saw the source code for the tab control, but that isn't going to happen.
All help or suggestions welcome, but I really do need a straight-forward answer.
By "clipping region" I assume you mean the area that has to be redrawn that windows passes to you.
Try this: The paint message handler should bitblit the area of the background image that corresponds to the part of the window that needs to be refreshed (so you don't draw over things that don't need updating). Then let the base class handle the rest.
If it's setting the repaint region to the entire window the tab control code should redraw everything after you've painted the background.
Having code to look at would help
I have designed a small tutorial named "Stacker", As the name suggests, The game involves stacking blocks on each other. I have a large number of blocks to be stacked and hence all cant be accomodated in the screen itself... I m new to cocos2d and box2d but have managed to create a body with its adjoining sprite wen a user clicks on the screen. I have used MouseJoint to give movement to the body till the user performs the drag action that is till the user takes his finger off the screen.
The problem is that i need to follow the sprite (actually need the camera to follow the sprite) when the user drags it above the screen space, i referred the following links with no success... i guess wat i need is to move the body to a virtual coordinates which m not getting coz even if the screen does shift using the camera methods, but the sprite doesnt move with respect to the screen...
cocos2d forum link
flash concept but box2d
Can some1 guide me in case i need to have some pre-requisites before following camera in the manner i specified.. Thanx!
Ok Guys!
Got it guys! Had to take a global variable which records the increments per frame, The increments were equal to the layer movement which i did by setting the position of the layer to a unit less in every frame! Then set the Mouse join to the target which is (ScreenCoordinates + increment) dis too has to be done in every frame!
Done!
Cool method but needed a bit of brainstorming!!