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The ParticleManagerCanvasRenderer now calculates its transform matrix differently, splitting out the parent matrix and factoring in the follow offsets separately. It also uses setToContext internally. This fixes numerous issues with particle emitters being incorrectly offset when added to Containers, or having the Camera zoomed, running under Canvas. Fix #4908 #4531 #4131

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This commit is contained in:
Richard Davey 2020-09-23 12:06:29 +01:00
parent e2d775e083
commit b86d982c00
1 changed files with 35 additions and 25 deletions
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60
src/gameobjects/particles/ParticleManagerCanvasRenderer.js
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@ -31,15 +31,23 @@ var ParticleManagerCanvasRenderer = function (renderer, emitterManager, camera,
var camMatrix = renderer._tempMatrix1.copyFrom(camera.matrix);
var calcMatrix = renderer._tempMatrix2;
var particleMatrix = renderer._tempMatrix3;
var managerMatrix = renderer._tempMatrix4.applyITRS(emitterManager.x, emitterManager.y, emitterManager.rotation, emitterManager.scaleX, emitterManager.scaleY);
var managerMatrix = renderer._tempMatrix4;
camMatrix.multiply(managerMatrix);
var roundPixels = camera.roundPixels;
if (parentMatrix)
{
managerMatrix.loadIdentity();
managerMatrix.multiply(parentMatrix);
managerMatrix.translate(emitterManager.x, emitterManager.y);
managerMatrix.rotate(emitterManager.rotation);
managerMatrix.scale(emitterManager.scaleX, emitterManager.scaleY);
}
else
{
managerMatrix.applyITRS(emitterManager.x, emitterManager.y, emitterManager.rotation, emitterManager.scaleX, emitterManager.scaleY);
}
var ctx = renderer.currentContext;
ctx.save();
var roundPixels = camera.roundPixels;
for (var e = 0; e < emittersLength; e++)
{
@ -52,17 +60,13 @@ var ParticleManagerCanvasRenderer = function (renderer, emitterManager, camera,
continue;
}
var scrollX = camera.scrollX * emitter.scrollFactorX;
var scrollY = camera.scrollY * emitter.scrollFactorY;
var followX = (emitter.follow) ? emitter.follow.x + emitter.followOffset.x : 0;
var followY = (emitter.follow) ? emitter.follow.y + emitter.followOffset.y : 0;
if (parentMatrix)
{
// Multiply the camera by the parent matrix
camMatrix.multiplyWithOffset(parentMatrix, -scrollX, -scrollY);
var scrollFactorX = emitter.scrollFactorX;
var scrollFactorY = emitter.scrollFactorY;
scrollX = 0;
scrollY = 0;
}
ctx.save();
ctx.globalCompositeOperation = renderer.blendModes[emitter.blendMode];
@ -77,24 +81,30 @@ var ParticleManagerCanvasRenderer = function (renderer, emitterManager, camera,
continue;
}
particleMatrix.applyITRS(particle.x, particle.y, particle.rotation, particle.scaleX, particle.scaleY);
camMatrix.copyFrom(camera.matrix);
camMatrix.multiplyWithOffset(managerMatrix, followX + -camera.scrollX * scrollFactorX, followY + -camera.scrollY * scrollFactorY);
// Undo the camera scroll
particleMatrix.e = particle.x;
particleMatrix.f = particle.y;
// Multiply by the particle matrix, store result in calcMatrix
camMatrix.multiply(particleMatrix, calcMatrix);
var frame = particle.frame;
var cd = frame.canvasData;
var x = -(frame.halfWidth);
var y = -(frame.halfHeight);
particleMatrix.applyITRS(0, 0, particle.rotation, particle.scaleX, particle.scaleY);
particleMatrix.e = particle.x - scrollX;
particleMatrix.f = particle.y - scrollY;
camMatrix.multiply(particleMatrix, calcMatrix);
ctx.globalAlpha = alpha;
ctx.save();
calcMatrix.copyToContext(ctx);
calcMatrix.setToContext(ctx);
if (roundPixels)
{
@ -108,9 +118,9 @@ var ParticleManagerCanvasRenderer = function (renderer, emitterManager, camera,
ctx.restore();
}
}
ctx.restore();
ctx.restore();
}
};
module.exports = ParticleManagerCanvasRenderer;