public void SplitFace_And_CollapseEdge_Are_Inverse()
{
// Arrange
var positions = new[]
{
new Vec3d(0, 0, 0),
new Vec3d(1, 0, 0),
new Vec3d(1, 1, 0),
new Vec3d(0, 1, 0),
};
var rand = new Random();
Mesh.Core.Mesh mesh = null;
for (int i = 0; i < 4; i++)
{
mesh = Mesh.Core.Mesh.CreateSingleFace(positions);
// Act
var index = rand.Next(0, 4);
mesh.SplitFace(0, index, (index + 2) % 4, out _);
mesh.CollapseEdge(1, 2);
// Assert
Assert.AreEqual(1, mesh.FaceCount);
Assert.AreEqual(4, mesh.VertexCount);
Assert.AreEqual(8, mesh.HalfEdgeCount);
}
}
public void CollapseEdge_Should_Work_On_Simple_Quad() // How would a collapsed edge on a quad look like?
{
// Arrange
var positions = new[]
{
new Vec3d(0, 0, 0),
new Vec3d(1, 0, 0),
new Vec3d(1, 1, 0),
new Vec3d(0, 1, 0),
};
var rand = new Random();
Mesh.Core.Mesh mesh = null;
for (int i = 0; i < 4; i++)
{
mesh = Mesh.Core.Mesh.CreateSingleFace(positions);
// Act
var index = rand.Next(0, 4);
mesh.CollapseEdge(0, index);
// Assert
Assert.AreEqual(1, mesh.FaceCount);
Assert.AreEqual(3, mesh.VertexCount);
Assert.AreEqual(6, mesh.HalfEdgeCount);
}
SimpleExporter.Export("D:\\Git\\PolygonMesh\\PolygonMesh.Library.Tests\\Resources\\test.obj", mesh);
}