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Removes some of the artifacts from textured lines

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This commit is contained in:
Viktor Lidholt 2015-09-23 08:33:48 -07:00
parent 53f83f795e
commit ac6cda4d20
1 changed files with 22 additions and 2 deletions
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24
packages/flutter_sprites/lib/textured_line.dart
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@ -75,6 +75,8 @@ class TexturedLinePainter {
_calculatedTextureStops = null;
}
bool removeArtifacts = true;
sky.TransferMode transferMode = sky.TransferMode.srcOver;
Paint _cachedPaint = new Paint();
@ -184,8 +186,26 @@ class TexturedLinePainter {
Offset offset0 = new Offset(miter[0] * halfWidth, miter[1] * halfWidth);
Offset offset1 = new Offset(-miter[0] * halfWidth, -miter[1] * halfWidth);
vertices.add(point + offset0);
vertices.add(point + offset1);
Point vertex0 = point + offset0;
Point vertex1 = point + offset1;
int vertexCount = vertices.length;
if (removeArtifacts && vertexCount >= 2) {
Point oldVertex0 = vertices[vertexCount - 2];
Point oldVertex1 = vertices[vertexCount - 1];
Point intersection = GameMath.lineIntersection(oldVertex0, oldVertex1, vertex0, vertex1);
if (intersection != null) {
if (GameMath.pointQuickDist(vertex0, intersection) < GameMath.pointQuickDist(vertex1, intersection)) {
vertex0 = oldVertex0;
} else {
vertex1 = oldVertex1;
}
}
}
vertices.add(vertex0);
vertices.add(vertex1);
}
void _calculateTextureStops() {