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Fix FLX_RENDER_TRIANGLE not rendering anything #3505

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Merged
merged 15 commits into from
Oct 14, 2025
Merged

Fix FLX_RENDER_TRIANGLE not rendering anything #3505

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e0bd735
fix FLX_RENDER_TRIANGLE
richTrash21 Sep 17, 2025
0dcd6bb
fix small oversight
richTrash21 Sep 17, 2025
4ad77fc
more accurate vertex and index ordering
richTrash21 Sep 23, 2025
a0d7539
Merge branch 'HaxeFlixel:dev' into bugfix/render-triangle-fix
richTrash21 Oct 10, 2025
4be6fd0
remove `#if !flash` conditional
richTrash21 Oct 10, 2025
8060c67
add types
Geokureli Oct 12, 2025
b4c59d0
deprecate colors
Geokureli Oct 12, 2025
f7c178d
back to point pooling
Geokureli Oct 12, 2025
902fbdb
improve readibility
Geokureli Oct 12, 2025
69fbedb
use transformX/Y rather than using a FlxPoint
Geokureli Oct 14, 2025
4ac7fd9
Last change I promise
Geokureli Oct 14, 2025
abc1236
deprecate colorsPosition
richTrash21 Oct 14, 2025
1a18bf8
oops
richTrash21 Oct 14, 2025
362931d
Merge pull request #1 from Geokureli/bugfix/render-tri-geo
richTrash21 Oct 14, 2025
8665091
add missing import
richTrash21 Oct 14, 2025
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10 changes: 5 additions & 5 deletions flixel/FlxCamera.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -765,9 +765,9 @@ class FlxCamera extends FlxBasic
var hasColorOffsets:Bool = (transform != null && transform.hasRGBAOffsets());

#if FLX_RENDER_TRIANGLE
var drawItem:FlxDrawTrianglesItem = startTrianglesBatch(frame.parent, smoothing, isColored, blend);
final drawItem = startTrianglesBatch(frame.parent, smoothing, isColored, blend, hasColorOffsets, shader);
#else
var drawItem = startQuadBatch(frame.parent, isColored, hasColorOffsets, blend, smoothing, shader);
final drawItem = startQuadBatch(frame.parent, isColored, hasColorOffsets, blend, smoothing, shader);
#end
drawItem.addQuad(frame, matrix, transform);
}
Expand Down Expand Up @@ -808,10 +808,10 @@ class FlxCamera extends FlxBasic
var isColored = (transform != null && transform.hasRGBMultipliers());
var hasColorOffsets:Bool = (transform != null && transform.hasRGBAOffsets());

#if !FLX_RENDER_TRIANGLE
var drawItem = startQuadBatch(frame.parent, isColored, hasColorOffsets, blend, smoothing, shader);
#if FLX_RENDER_TRIANGLE
final drawItem = startTrianglesBatch(frame.parent, smoothing, isColored, blend, hasColorOffsets, shader);
#else
var drawItem:FlxDrawTrianglesItem = startTrianglesBatch(frame.parent, smoothing, isColored, blend);
final drawItem = startQuadBatch(frame.parent, isColored, hasColorOffsets, blend, smoothing, shader);
#end
drawItem.addQuad(frame, _helperMatrix, transform);
}
Expand Down
85 changes: 48 additions & 37 deletions flixel/graphics/tile/FlxDrawTrianglesItem.hx
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ typedef DrawData<T> = openfl.Vector<T>;
*/
class FlxDrawTrianglesItem extends FlxDrawBaseItem<FlxDrawTrianglesItem>
{
static inline final INDICES_PER_QUAD = 6;
static var point:FlxPoint = FlxPoint.get();
static var rect:FlxRect = FlxRect.get();

Expand Down Expand Up @@ -280,12 +281,11 @@ class FlxDrawTrianglesItem extends FlxDrawBaseItem<FlxDrawTrianglesItem>

override public function addQuad(frame:FlxFrame, matrix:FlxMatrix, ?transform:ColorTransform):Void
{
var prevVerticesPos:Int = verticesPosition;
var prevIndicesPos:Int = indicesPosition;
var prevColorsPos:Int = colorsPosition;
var prevNumberOfVertices:Int = numVertices;
final prevVerticesPos = verticesPosition;
final prevIndicesPos = indicesPosition;
final prevNumberOfVertices = numVertices;

var point = FlxPoint.get();
point.set(0, 0);
point.transform(matrix);

vertices[prevVerticesPos] = point.x;
Expand All @@ -303,59 +303,70 @@ class FlxDrawTrianglesItem extends FlxDrawBaseItem<FlxDrawTrianglesItem>
uvtData[prevVerticesPos + 2] = frame.uv.right;
uvtData[prevVerticesPos + 3] = frame.uv.top;

point.set(frame.frame.width, frame.frame.height);
point.set(0, frame.frame.height);
point.transform(matrix);

vertices[prevVerticesPos + 4] = point.x;
vertices[prevVerticesPos + 5] = point.y;

uvtData[prevVerticesPos + 4] = frame.uv.right;
uvtData[prevVerticesPos + 4] = frame.uv.left;
uvtData[prevVerticesPos + 5] = frame.uv.bottom;

point.set(0, frame.frame.height);
point.set(frame.frame.width, frame.frame.height);
point.transform(matrix);

vertices[prevVerticesPos + 6] = point.x;
vertices[prevVerticesPos + 7] = point.y;

point.put();

uvtData[prevVerticesPos + 6] = frame.uv.left;
uvtData[prevVerticesPos + 6] = frame.uv.right;
uvtData[prevVerticesPos + 7] = frame.uv.bottom;

indices[prevIndicesPos] = prevNumberOfVertices;
indices[prevIndicesPos + 1] = prevNumberOfVertices + 1;
indices[prevIndicesPos + 2] = prevNumberOfVertices + 2;
indices[prevIndicesPos + 3] = prevNumberOfVertices + 2;
indices[prevIndicesPos + 4] = prevNumberOfVertices + 3;
indices[prevIndicesPos + 5] = prevNumberOfVertices;
indices[prevIndicesPos + 3] = prevNumberOfVertices + 1;
indices[prevIndicesPos + 4] = prevNumberOfVertices + 2;
indices[prevIndicesPos + 5] = prevNumberOfVertices + 3;

if (colored)
final alphaMultiplier = transform != null ? transform.alphaMultiplier : 1.0;
for (i in 0...INDICES_PER_QUAD)
alphas.push(alphaMultiplier);

if (colored || hasColorOffsets)
{
var red = 1.0;
var green = 1.0;
var blue = 1.0;
var alpha = 1.0;

if (transform != null)
if (colorMultipliers == null)
colorMultipliers = [];

if (colorOffsets == null)
colorOffsets = [];

for (i in 0...INDICES_PER_QUAD)
{
red = transform.redMultiplier;
green = transform.greenMultiplier;
blue = transform.blueMultiplier;

#if !neko
alpha = transform.alphaMultiplier;
#end
if (transform != null)
{
colorMultipliers.push(transform.redMultiplier);
colorMultipliers.push(transform.greenMultiplier);
colorMultipliers.push(transform.blueMultiplier);

colorOffsets.push(transform.redOffset);
colorOffsets.push(transform.greenOffset);
colorOffsets.push(transform.blueOffset);
colorOffsets.push(transform.alphaOffset);
}
else
{
colorMultipliers.push(1);
colorMultipliers.push(1);
colorMultipliers.push(1);

colorOffsets.push(0);
colorOffsets.push(0);
colorOffsets.push(0);
colorOffsets.push(0);
}

colorMultipliers.push(1);
}

var color = FlxColor.fromRGBFloat(red, green, blue, alpha);

colors[prevColorsPos] = color;
colors[prevColorsPos + 1] = color;
colors[prevColorsPos + 2] = color;
colors[prevColorsPos + 3] = color;
Comment on lines -353 to -356
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@Geokureli Geokureli Oct 12, 2025

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Should we deprecate colors?

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@Geokureli Geokureli Oct 12, 2025

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I notice colors is still used in addTriangles should that be changed as well? why does that seem to work but not this?

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@richTrash21 richTrash21 Oct 14, 2025 •
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Should we deprecate colors?

Yes, but only in triangle draw item. I think colors as a feature is really nice and should stay, but with different implementation. This would also fix #2263.

I notice colors is still used in addTriangles should that be changed as well? why does that seem to work but not this?

FYI, this is explained this in the description. This was also originally adressed in #3472, where colors were multiplied to transform. I was planning to make this as a sepparate pr, but it might be better to add this change here.

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@Geokureli Geokureli Oct 14, 2025

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I think colors as a feature is really nice and should stay, but with different implementation.

Care to make an issue detailing the ideal implementation of colors?


colorsPosition += 4;
}

verticesPosition += 8;
Expand Down