/// <summary>
/// Union a and b together. This can either return a single item with a mesh on it
/// or a group item that has the a and be items as children
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="doMeshCombine"></param>
/// <returns></returns>
public static IObject3D Plus(this IObject3D a, IObject3D b, bool doMeshCombine = false)
{
if (doMeshCombine)
{
var combine = new CombineObject3D_2();
combine.Children.Add(a.Clone());
combine.Children.Add(b.Clone());
combine.Combine();
var finalMesh = combine.VisibleMeshes().First().Mesh;
return(new Object3D()
{
Mesh = finalMesh
});
}
else
{
var group = new GroupObject3D();
group.Children.Add(a);
group.Children.Add(b);
return(group);
}
}
public async Task CombineTests()
{
StartupMC();
// Combine has correct results
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var offsetCubeB = new TranslateObject3D(cubeB, 10);
Assert.IsTrue(offsetCubeB.GetAxisAlignedBoundingBox().Equals(new AxisAlignedBoundingBox(
0, -10, -10,
20, 10, 10), .001));
var union = new CombineObject3D_2();
union.Children.Add(cubeA);
union.Children.Add(offsetCubeB);
root.Children.Add(union);
Assert.IsTrue(union.GetAxisAlignedBoundingBox().Equals(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10), .001));
Assert.IsTrue(root.GetAxisAlignedBoundingBox().Equals(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10), .001));
union.Combine();
Assert.IsTrue(union.GetAxisAlignedBoundingBox().Equals(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10), .001));
union.Flatten(null);
Assert.AreEqual(1, root.Children.Count());
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
}
// Combine has correct results when inner content is changed
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var union = new CombineObject3D_2();
union.Children.Add(cubeA);
union.Children.Add(cubeB);
root.Children.Add(union);
union.Combine();
Assert.AreEqual(5, root.Descendants().Count());
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
10, 10, 10).Equals(rootAabb, .001));
var offsetCubeB = new TranslateObject3D(cubeB, 10);
union.Combine();
Assert.AreEqual(7, root.Descendants().Count());
rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
}
// now make sure undo has the right results for flatten
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var offsetCubeB = new TranslateObject3D(cubeB, 10);
var combine = new CombineObject3D_2();
combine.Children.Add(cubeA);
combine.Children.Add(offsetCubeB);
root.Children.Add(combine);
Assert.AreEqual(5, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 cubeB, 4 offset cubeB, 5 offset sourceItem");
combine.Combine();
Assert.AreEqual(7, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 offset cubeB, 6 offset sourceItem, wrapped cubeB");
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
var undoBuffer = new UndoBuffer();
combine.Flatten(undoBuffer);
Assert.AreEqual(1, root.Descendants().Count());
Assert.AreEqual(1, root.Children.Count());
rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
undoBuffer.Undo();
Assert.AreEqual(7, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 offset cubeB, 6 offset sourceItem, wrapped cubeB");
}
// now make sure undo has the right results for remove
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
cubeA.Name = "cubeA";
var cubeB = await CubeObject3D.Create(20, 20, 20);
cubeB.Name = "cubeB";
var combine = new CombineObject3D_2();
combine.Children.Add(cubeA);
combine.Children.Add(cubeB);
root.Children.Add(combine);
Assert.AreEqual(3, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 cubeB");
combine.Combine();
Assert.AreEqual(5, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 wrapped cubeB");
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
10, 10, 10).Equals(rootAabb, .001));
var undoBuffer = new UndoBuffer();
combine.Remove(undoBuffer);
Assert.AreEqual(2, root.Descendants().Count(), "Should have the 1 cubeA, 2 cubeB");
rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
10, 10, 10).Equals(rootAabb, .001));
undoBuffer.Undo();
Assert.AreEqual(5, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 wrapped cubeB");
}
// now make sure undo has the right results for remove
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var offsetCubeB = new TranslateObject3D(cubeB, 10);
var combine = new CombineObject3D_2();
combine.Children.Add(cubeA);
combine.Children.Add(offsetCubeB);
root.Children.Add(combine);
Assert.AreEqual(5, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 cubeB, 4 offset cubeB, 5 offset sourceItem");
combine.Combine();
Assert.AreEqual(7, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 offset cubeB, 6 offset sourceItem, wrapped cubeB");
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
var undoBuffer = new UndoBuffer();
combine.Remove(undoBuffer);
Assert.AreEqual(4, root.Descendants().Count(), "Should have the 1 cubeA, 2 cubeB, 3 offset cubeB, 4 offset sourceItem");
rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
undoBuffer.Undo();
Assert.AreEqual(7, root.Descendants().Count(), "Should have the 1 combine, 2 cubeA, 3 wrapped cubeA, 4 cubeB, 5 offset cubeB, 6 offset sourceItem, wrapped cubeB");
}
// make sure the MatterCAD add function is working
{
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var offsetCubeB = new TranslateObject3D(cubeB, 10);
var plus = cubeA.Plus(offsetCubeB, true);
Assert.AreEqual(0, plus.Children.Count());
Assert.IsTrue(plus.Mesh != null);
var aabb = plus.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(aabb, .001));
}
// test single object combine
{
var root = new Object3D();
var cubeA = await CubeObject3D.Create(20, 20, 20);
var cubeB = await CubeObject3D.Create(20, 20, 20);
var offsetCubeB = new TranslateObject3D(cubeB, 10);
var group = new Object3D();
group.Children.Add(cubeA);
group.Children.Add(offsetCubeB);
var union = new CombineObject3D_2();
union.Children.Add(group);
root.Children.Add(union);
union.Combine();
Assert.AreEqual(8, root.Descendants().Count(), "group, union, wa, a, wtb, tb, b");
union.Flatten(null);
Assert.AreEqual(1, root.Descendants().Count(), "Should have the union result");
Assert.AreEqual(1, root.Children.Count());
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
20, 10, 10).Equals(rootAabb, .001));
}
}
