public static IObject3D Minus(this IObject3D a, IObject3D b)
{
var resultsA = a.Clone();
SubtractObject3D.Subtract(resultsA.VisibleMeshes().Select((i) => i).ToList(), b.VisibleMeshes().Select((i) => i).ToList());
return(resultsA);
}
public static IObject3D Minus(this IObject3D a, IObject3D b)
{
var subtract = new SubtractObject3D();
subtract.Children.Add(a.Clone());
var bClone = b.Clone();
subtract.Children.Add(bClone);
subtract.ItemsToSubtract.Add(bClone.ID);
subtract.Subtract();
var finalMesh = subtract.VisibleMeshes().First().Mesh;
return new Object3D()
{
Mesh = finalMesh
};
}
public async Task SubtractTests()
{
// Subtract has correct number of 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);
var subtract = new SubtractObject3D();
subtract.Children.Add(cubeA);
subtract.Children.Add(offsetCubeB);
subtract.SelectedChildren.Add(offsetCubeB.ID);
root.Children.Add(subtract);
subtract.Subtract();
subtract.Flatten(null);
Assert.AreEqual(1, root.Children.Count());
var rootAabb = root.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
0, 10, 10).Equals(rootAabb, .001));
}
// make sure the MatterCAD subtract 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 subtract = cubeA.Minus(offsetCubeB);
Assert.AreEqual(0, subtract.Children.Count());
Assert.IsTrue(subtract.Mesh != null);
var aabb = subtract.GetAxisAlignedBoundingBox();
Assert.IsTrue(new AxisAlignedBoundingBox(
-10, -10, -10,
0, 10, 10).Equals(aabb, .001));
}
}
