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part of flutter_sprites;
class _PhysicsDebugDraw extends box2d.DebugDraw {
_PhysicsDebugDraw(
box2d.ViewportTransform transform,
this.physicsWorld
) : super(transform) {
appendFlags(
box2d.DebugDraw.JOINT_BIT |
box2d.DebugDraw.CENTER_OF_MASS_BIT |
box2d.DebugDraw.WIREFRAME_DRAWING_BIT
);
}
PhysicsWorld physicsWorld;
Canvas canvas;
@override
void drawSegment(Vector2 p1, Vector2 p2, box2d.Color3i color) {
Paint paint = new Paint()
..color = _toColor(color)
..strokeWidth = 1.0;
canvas.drawLine(_toPoint(p1), _toPoint(p2), paint);
}
@override
void drawSolidPolygon(
List<Vector2> vertices,
int vertexCount,
box2d.Color3i color
) {
Path path = new Path();
Point pt = _toPoint(vertices[0]);
path.moveTo(pt.x, pt.y);
for (int i = 1; i < vertexCount; i++) {
pt = _toPoint(vertices[i]);
path.lineTo(pt.x, pt.y);
}
Paint paint = new Paint()..color = _toColor(color);
canvas.drawPath(path, paint);
}
@override
void drawCircle(Vector2 center, num radius, box2d.Color3i color, [Vector2 axis]) {
Paint paint = new Paint()
..color = _toColor(color)
..style = PaintingStyle.stroke
..strokeWidth = 1.0;
canvas.drawCircle(_toPoint(center), _scale(radius), paint);
}
@override
void drawSolidCircle(Vector2 center, num radius, Vector2 axis, box2d.Color3i color) {
Paint paint = new Paint()
..color = _toColor(color);
canvas.drawCircle(_toPoint(center), _scale(radius), paint);
}
@override
void drawPoint(Vector2 point, num radiusOnScreen, box2d.Color3i color) {
drawSolidCircle(point, radiusOnScreen, null, color);
}
@override
void drawParticles(
List<Vector2> centers,
double radius,
List<box2d.ParticleColor> colors,
int count
) {
// TODO: Implement
}
@override
void drawParticlesWireframe(
List<Vector2> centers,
double radius,
List<box2d.ParticleColor> colors,
int count
) {
// TODO: Implement
}
@override
void drawTransform(box2d.Transform xf, box2d.Color3i color) {
drawCircle(xf.p, 0.1, color);
// TODO: Improve
}
@override
void drawStringXY(num x, num y, String s, box2d.Color3i color) {
// TODO: Implement
}
Color _toColor(box2d.Color3i color) {
return new Color.fromARGB(255, color.x, color.y, color.z);
}
Point _toPoint(Vector2 vec) {
return new Point(
vec.x * physicsWorld.b2WorldToNodeConversionFactor,
vec.y * physicsWorld.b2WorldToNodeConversionFactor
);
}
double _scale(double value) {
return value * physicsWorld.b2WorldToNodeConversionFactor;
}
}