childEdge method
Get a child edge.
Implementation
EdgeShape childEdge(int index) {
assert(0 <= index && index < vertexCount - 1);
final edge = EdgeShape();
edge.radius = radius;
final v0 = vertices[index + 0];
final v1 = vertices[index + 1];
edge.vertex1.x = v0.x;
edge.vertex1.y = v0.y;
edge.vertex2.x = v1.x;
edge.vertex2.y = v1.y;
if (index > 0) {
final v = vertices[index - 1];
edge.vertex0.x = v.x;
edge.vertex0.y = v.y;
edge.hasVertex0 = true;
} else {
edge.vertex0.x = _prevVertex.x;
edge.vertex0.y = _prevVertex.y;
edge.hasVertex0 = _hasPrevVertex;
}
if (index < vertexCount - 2) {
final v = vertices[index + 2];
edge.vertex3.x = v.x;
edge.vertex3.y = v.y;
edge.hasVertex3 = true;
} else {
edge.vertex3.x = _nextVertex.x;
edge.vertex3.y = _nextVertex.y;
edge.hasVertex3 = _hasNextVertex;
}
return edge;
}