public VertexTriangle Rotate(float radian, Vector2 center)
{
Vector2 a = vertexA.Position.Rotate(radian, center);
Vector2 b = vertexB.Position.Rotate(radian, center);
Vector2 c = vertexC.Position.Rotate(radian, center);
return(new VertexTriangle(vertexA.ChangePosition(a), vertexB.ChangePosition(b), vertexC.ChangePosition(c)));
}
public static VertexTriangle Rotate(Vertex vertexA, Vertex vertexB, Vertex vertexC, float radian)
{
Vector2 a = vertexA.Position;
Vector2 b = vertexB.Position.Rotate(radian, a);
Vector2 c = vertexC.Position.Rotate(radian, a);
return(new VertexTriangle(vertexA, vertexB.ChangePosition(b), vertexC.ChangePosition(c)));
}
