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Added render function for chainShape Box2d

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parkerr
2019-11-27 18:01:28 +13:00
parent c3ba33fd8e
commit d197dc8ecd
1 changed files with 26 additions and 1 deletions
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27
lib/box2d/box2d_component.dart
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@ -117,7 +117,7 @@ abstract class BodyComponent extends Component {
fixture = fixture.getNext()) { fixture = fixture.getNext()) {
switch (fixture.getType()) { switch (fixture.getType()) {
case ShapeType.CHAIN: case ShapeType.CHAIN:
throw Exception('not implemented'); _renderChain(canvas, fixture);
break; break;
case ShapeType.CIRCLE: case ShapeType.CIRCLE:
_renderCircle(canvas, fixture); _renderCircle(canvas, fixture);
@ -134,6 +134,31 @@ abstract class BodyComponent extends Component {
Vector2 get center => body.worldCenter; Vector2 get center => body.worldCenter;
void _renderChain(Canvas canvas, Fixture fixture) {
final ChainShape chainShape = fixtureDef.getShape();
final List<Vector2> vertices = Vec2Array().get(chainShape.getVertexCount());
for (int i = 0; i < chainShape.getVertexCount(); ++i) {
body.getWorldPointToOut(chainShape.getVertex(i), vertices[i]);
viewport.getWorldToScreen(vertices[i], vertices[i]);
}
final List<Offset> points = [];
for (int i = 0; i < chainShape.getVertexCount(); i++) {
points.add(Offset(vertices[i].x, vertices[i].y));
}
renderChain(canvas, points);
}
void renderChain(Canvas canvas, List<Offset> points) {
final Paint paint = Paint()
..color = const Color.fromARGB(255, 255, 255, 255);
final path = Path()..addPolygon(points, true);
canvas.drawPath(path, paint);
}
void _renderCircle(Canvas canvas, Fixture fixture) { void _renderCircle(Canvas canvas, Fixture fixture) {
final Vector2 center = Vector2.zero(); final Vector2 center = Vector2.zero();
final CircleShape circle = fixture.getShape(); final CircleShape circle = fixture.getShape();