rotateVertices function
Implementation
List<Point<double>> rotateVertices(Size size, double theta) {
final double cosTheta = cos(theta);
final double sinTheta = sin(theta);
final List<Point<double>> vertices = <Point<double>>[
Point<double>(size.width / 2, size.height / 2),
Point<double>(-size.width / 2, size.height / 2),
Point<double>(-size.width / 2, -size.height / 2),
Point<double>(size.width / 2, -size.height / 2)
];
return vertices.map((Point<double> vertex) {
final double xNew = vertex.x * cosTheta - vertex.y * sinTheta;
final double yNew = vertex.x * sinTheta + vertex.y * cosTheta;
return Point<double>(xNew, yNew);
}).toList();
}