private static void AssertGeometryIsClockWise(MockGeometry geometry)
{
Vector3D vertex0 = geometry.GetVertexPosition(0);
Vector3D vertex1 = geometry.GetVertexPosition(1);
Vector3D vertex2 = geometry.GetVertexPosition(2);
Assert.IsTrue(vertex0.X >= vertex1.X);
Assert.IsTrue(vertex1.X <= vertex2.X);
Assert.IsTrue(vertex2.X <= vertex0.X);
Assert.IsTrue(vertex0.Y >= vertex1.Y);
Assert.IsTrue(vertex1.Y <= vertex2.Y);
Assert.IsTrue(vertex2.Y >= vertex0.Y);
}
public void WindingOfVerticesShouldBeCounterClockWise()
{
if (!StackTraceExtensions.IsStartedFromNCrunch())
{
return; //ncrunch: no coverage
}
MockGeometry geometry = CreateMockGeometry();
var indices = new short[] { 0, 1, 2 };
geometry.SetData(CreateVertexData(), indices);
AssertVertices(geometry, indices);
AssertGeometryIsCounterClockWise(geometry);
}
private void AssertVertices(MockGeometry geometry, short[] indices)
{
Assert.AreEqual(vertex0, geometry.GetVertexPosition(indices[0]));
Assert.AreEqual(vertex1, geometry.GetVertexPosition(indices[1]));
Assert.AreEqual(vertex2, geometry.GetVertexPosition(indices[2]));
}
