set method

void set(Shape shape, int index)

Initialize the proxy using the given shape. The shape must remain in scope while the proxy is in use.

Implementation

void set(Shape shape, int index) {
  switch (shape.shapeType) {
    case ShapeType.circle:
      final circle = shape as CircleShape;
      vertices[0].setFrom(circle.position);
      _count = 1;
      radius = circle.radius;

      break;
    case ShapeType.polygon:
      final poly = shape as PolygonShape;
      _count = poly.vertices.length;
      radius = poly.radius;
      for (var i = 0; i < _count; i++) {
        vertices[i].setFrom(poly.vertices[i]);
      }
      break;
    case ShapeType.chain:
      final chain = shape as ChainShape;
      assert(0 <= index && index < chain.vertexCount);

      buffer[0] = chain.vertices[index];
      if (index + 1 < chain.vertexCount) {
        buffer[1] = chain.vertices[index + 1];
      } else {
        buffer[1] = chain.vertices[0];
      }

      vertices[0].setFrom(buffer[0]);
      vertices[1].setFrom(buffer[1]);
      _count = 2;
      radius = chain.radius;
      break;
    case ShapeType.edge:
      final edge = shape as EdgeShape;
      vertices[0].setFrom(edge.vertex1);
      vertices[1].setFrom(edge.vertex2);
      _count = 2;
      radius = edge.radius;
      break;
    default:
      assert(false);
  }
}