Drawing on an Object
Is there any way to draw on an object? I'm trying to make a flight control-like game, and I need to be able to "draw" the lines without creating too many objects. I thought I would make this happen by having the mouse (or finger) draw a line on an otherwise transparent object, but I can't find a way to make this happen in the iOS runtime.
I wouldn't even know how to do this with the normal runtime, so I would be intrested in how to do this too :-)
I was thinking maybe posting an image into the background, but I haven't tried it yet... And then there's erasing that image afterwards...
That's exactly how I do it. You can paste to background as an obstacle or platform while the mouse key is pressed. I am creating a faux physics style game where you draw the platforms to guide a ball to a goal. It works really well on the iPhone now too. I do get dots if I swipe too quickly though. I haven't found a way around that yet.
that reminds me of crayon physics deluxe (i love that game!) i actually play it using my Wacom tablet so i can use the pen to draw... i am really intersted in this type of mechanic - keep us postedOriginally Posted by mrmdesign
Glad you like the idea.
I almost thought of discarding it a while back as there are a few doodle style games on the app store. The only issues I have is the dotty lines (I may have found a way round this though), the misbehaving pinball object and an issue with dissappearing lines when they are out of the camera area. The lines go away visually but the ball still bounces on their invisible ghostly leftovers. Any one have any ideas? Thanks.
This works well on the iPhone? I would think it would be a bit laggy... I guess I'll have to try it myself. Thanks Marc, and Good luck on your game!
Good idea. I tried it myself and found out that you should use fading circles like this: http://kaputte-moderne.sweat-lodge.d...ck_blurred.png as the PAINTOBJECT. Maybe put a little add fx on it so the illusion of a line starts to happen (hmm funny... am I soundling like Bob Ross?). But a good and simple idea! Thx.
You could get around the dots problem by getting the current coordinates of the touch and the coordinates it was on during the last run through the event loop, and creating objects along the line between the two points. (Admittedly I'm making this sound more simple than it is!)
Yea this is something I´d love to see ( I havent managed to create the "in betweeners" yet). If I find out a way - I´ll post it here. At the moment I work with the faded dot and "slower" moving mouse... or finger
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