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Improve performance of debug drawing #3168

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Improve performance of debug drawing #3168

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74b45b6
Add a zoom parameter and change lineStyle to just 4 lines surrounding…
Cheemsandfriends Jun 5, 2024
be93dda
Merge branch 'dev' into patch-10
Geokureli Jun 12, 2024
6ec694b
remove zoom arg
Geokureli Jun 12, 2024
cdd1e8e
line margins to pixel
Geokureli Jun 12, 2024
d1c0985
add debug drawing helper
Geokureli Jun 12, 2024
cad7993
d'oh
Geokureli Jun 13, 2024
2e5577d
draw bounding box in one shape
Geokureli Jun 13, 2024
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15 changes: 11 additions & 4 deletions flixel/FlxObject.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -1292,11 +1292,11 @@ class FlxObject extends FlxBasic

var rect = getBoundingBox(camera);
var gfx:Graphics = beginDrawDebug(camera);
drawDebugBoundingBox(gfx, rect, allowCollisions, immovable);
drawDebugBoundingBox(gfx, rect, allowCollisions, immovable, camera.zoom);
endDrawDebug(camera);
}

function drawDebugBoundingBox(gfx:Graphics, rect:FlxRect, allowCollisions:Int, partial:Bool)
function drawDebugBoundingBox(gfx:Graphics, rect:FlxRect, allowCollisions:Int, partial:Bool, ?zoom:Float = 1.0)
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I think it's fine to simply use a size of 0.5 like it has been, in fact, there's benefits to having this not perfectly align with the camera's pixel resolution, as it more discernible, plus adding new args may break overriding classes

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Yeah... I don't think you would want that, I didn't want to do it either, but without doing a "zoom" variable, this is what it looks like:
imagen

Compared to this:
imagen

This is normal btw, this is OpenGL doing its shenanigans and sometimes its not 100% accurate to display stuff in exchange of performance.

One thing that I tried as possible to make it not break a lot, is adding a "Nulled" already set variable at the end, so people with older code and trying to port it could use this function and would not give an error

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@Geokureli Geokureli Jun 12, 2024 •
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I was able to omit the zoom arg, without missing lines (I didn't see any at zoom = 0.3, but I see a little at zoom=0.2, which I'm okay with)

rather than drawing the rect at ±.5 from the rect, I draw a rect where the outer rect matches the given rect, and the inner rect is 1px smaller, this aligns them more with the actual pixels and more closely matches the old behavior

{
// Find the color to use
var color:Null<Int> = debugBoundingBoxColor;
Expand All @@ -1313,8 +1313,13 @@ class FlxObject extends FlxBasic
}

// fill static graphics object with square shape
gfx.lineStyle(1, color, 0.75);
gfx.drawRect(rect.x + 0.5, rect.y + 0.5, rect.width - 1.0, rect.height - 1.0);
gfx.beginFill(color, 0.5);
var size = Math.max(1 / zoom, 1);

gfx.drawRect(rect.x - size, rect.y - size, size, rect.height + size);
gfx.drawRect(rect.x, rect.y - size, rect.width + size, size);
gfx.drawRect(rect.x + rect.width, rect.y, size, rect.height - size);
gfx.drawRect(rect.x, rect.y + rect.height - size, rect.width + size, size);
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@Geokureli Geokureli Jun 5, 2024 •
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Will these have stronger color in the overlapping corners? Rather than drawing 4 rects could we specify 8 points to make a hollow rect shape?
also 0.5 alpha should be .75

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Nope, this won't have stronger color cos they're not overlapping, they're drawn in a specific way so they don't touch, that's why all the weird math between the positions and the sizes lol

The alpha was set 0.5 before I changed it, so it was like that. altho I could change it to .75 no problem.

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imagen
this is how the corners look lol

}

inline function beginDrawDebug(camera:FlxCamera):Graphics
Expand All @@ -1334,6 +1339,8 @@ class FlxObject extends FlxBasic
{
if (FlxG.renderBlit)
camera.buffer.draw(FlxSpriteUtil.flashGfxSprite);
else if (FlxG.renderTile)
camera.debugLayer.graphics.endFill();
}
#end

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2 changes: 1 addition & 1 deletion flixel/tile/FlxTilemap.hx
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Expand Up @@ -605,7 +605,7 @@ class FlxTypedTilemap<Tile:FlxTile> extends FlxBaseTilemap<Tile>
{
rect.x = _helperPoint.x + (columnIndex % widthInTiles) * rectWidth;
rect.y = _helperPoint.y + Math.floor(columnIndex / widthInTiles) * rectHeight;
drawDebugBoundingBox(camera.debugLayer.graphics, rect, tile.allowCollisions, tile.allowCollisions != ANY);
drawDebugBoundingBox(camera.debugLayer.graphics, rect, tile.allowCollisions, tile.allowCollisions != ANY, camera.zoom);
}

columnIndex++;
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