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Occasional Missing Row
I've been using Modest Maps for a while now and I'm having a couple new problems and since I've gotten such great help here I thought I'd ask another question.
First, the things I've changed. I reduced the condemnation delay of when tiles are removed. I turned off drawing the well and mask (the latter I'm not sure what it does) as it was creating a haze effect on my xparent images. And I increased the tile buffer to size 1.
Here are my problems, both happen rarely:
1) Sometimes when I zoom in the top row of tiles don't get drawn in. If I simply click on the map they appear immediately, leading me to believe they were fetched. This happens when my buffer is at 0 and 1, but seems to happen less at 1.
2) This problem happens even less often, but sometimes there will be a seam between the tiles. I can't find a pattern to it and it isn't that big of a deal.
I'm just hoping somebody has seen these before and can offer some advice.
First, the things I've changed. I reduced the condemnation delay of when tiles are removed. I turned off drawing the well and mask (the latter I'm not sure what it does) as it was creating a haze effect on my xparent images. And I increased the tile buffer to size 1.
Here are my problems, both happen rarely:
1) Sometimes when I zoom in the top row of tiles don't get drawn in. If I simply click on the map they appear immediately, leading me to believe they were fetched. This happens when my buffer is at 0 and 1, but seems to happen less at 1.
2) This problem happens even less often, but sometimes there will be a seam between the tiles. I can't find a pattern to it and it isn't that big of a deal.
I'm just hoping somebody has seen these before and can offer some advice.
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Inappropriate?I've seen the seams before and in fact I'm in the process of rewriting the TileGrid entirely because I got sucked down the rabbit-hole trying to fix the problem :)
The drawing on the well and tilegrid means that you can click and drag the map around before the tiles have loaded - otherwise there's nothing there to click on. If you're on a fast connection and you're not dragging very far, you might not have noticed this.
As for the missing row, it sounds like you've modified a bunch of little things, so it would be hard for us to reproduce the problem exactly. If you can post a minimal test case (with source code) we might be able to help, but to be honest it sounds like a tricky thing to debug and if raising the tile buffer fixes it then that's probably what the tile buffer is for :)
I’m undecided
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Inappropriate?Hey Random ... thanks for the quick reply. Glad to hear the seam isn't a unique problem and I'm looking forward to your update.
As for the missing row it sounds like this isn't familiar to you. I have only changed the three things I mentioned, all in TileGrid.as of the AS3 source. Here they are:
Condemn delay (just made it shorter):
return (_rows * _columns * 0.05) * 1000;
Turn off unnecessary drawing:
protected var _drawWell:Boolean = false;
protected var _drawGridArea:Boolean = false;
Changed tile buffer to 1:
protected var _tileBuffer:int = 1;
I assure you I those are my only changes. I was going to subclass the TileGrid to localize my changes (and possibly make updates easier) but that'd require me to modify Map to take a diff't tile grid, so I didn't bother and changed in place.
As I said before, the missing row happens only occasionally and it is hard to reproduce, but I see it at least once just about every time I test.
If you haven't seen it then it will be hard for you to help. Hopefully sometime soon I can get a public example for you (and others) to check out.
Thanks again!
I’m appreciative of the help.
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