diff --git a/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs b/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
index 535df3f..024607b 100644
--- a/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
+++ b/OSCADSharp/OSCADSharp.ConsoleTests/Program.cs
@@ -13,7 +13,7 @@ namespace OSCADSharp.ConsoleTests
{
static void Main(string[] args)
{
- var cube = new Cube(50, 50, 50, true).Translate(30, 30, 30).Rotate(25, 45, -90);
+ var cube = new Cube(13, 13, 13).Rotate(90, 37.5, -180);
var pos = cube.Position();
var cyl1 = new Cylinder(1, 100, true).Translate(pos);
diff --git a/OSCADSharp/OSCADSharp.UnitTests/InterpolationTests.cs b/OSCADSharp/OSCADSharp.UnitTests/InterpolationTests.cs
new file mode 100644
index 0000000..396369a
--- /dev/null
+++ b/OSCADSharp/OSCADSharp.UnitTests/InterpolationTests.cs
@@ -0,0 +1,119 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using OSCADSharp.Solids;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OSCADSharp.UnitTests
+{
+ [TestClass]
+ public class InterpolationTests
+ {
+ //Positive X rotation
+ [TestMethod]
+ public void Interpolation_RotateOnXAxis()
+ {
+ var cube = new Cube(9, 9, 9).Rotate(90, 0, 0);
+
+ //Rotating on X axis by 90 should shift the center of the cube on the negative Y quadrant
+ Assert.AreEqual(new Vector3(4.5, -4.5, 4.5), cube.Position());
+ }
+
+ //Negative X rotation
+ [TestMethod]
+ public void Interpolation_NegativeRotationOnXAxis()
+ {
+ var cube = new Cube(11, 11, 11).Rotate(-90, 0, 0);
+
+ //Rotating on X axis by -90 should shift the center of the cube on the negative Z quadrant
+ Assert.AreEqual(new Vector3(5.5, 5.5, -5.5), cube.Position());
+ }
+
+ //Y Rotation
+ [TestMethod]
+ public void Interpolation_PositiveYRotationWithTallCube()
+ {
+ var cube = new Cube(10, 12, 23).Rotate(0, 90, 0);
+
+ //Rotating on Y axis by 90 should shift the center of the cube on the negative Z quadrant
+ Assert.AreEqual(new Vector3(11.5, 6, -5), cube.Position());
+ }
+
+ //Negative Y rotation
+ [TestMethod]
+ public void Interpolation_NegativeYRotationWithWideCube()
+ {
+ var cube = new Cube(10, 30, 15).Rotate(0, -90, 0);
+
+ //Rotating on Y axis by -90 should shift the center of the cube on the negative X quadrant
+ Assert.AreEqual(new Vector3(-7.5, 15, 5), cube.Position());
+ }
+
+ //Z Rotation
+ [TestMethod]
+ public void Interpolation_ZRotationWithLongCube()
+ {
+ var cube = new Cube(10, 5, 2).Rotate(0, 0, 115);
+
+ //Rotating on Z axis by 90 should shift the center of the cube on the negative X quadrant
+ Assert.AreEqual(new Vector3(-4.37886077629512, 3.4749932808315, 1), cube.Position());
+ }
+
+ //Negative Z rotation
+ [TestMethod]
+ public void Interpolation_NegativeZRotation()
+ {
+ var cube = new Cube(10, 5, 2).Rotate(0, 0, -95);
+
+ //Rotating on Z axis by 90 should shift the center of the cube on the negative Y quadrant
+ Assert.AreEqual(new Vector3(2.05470803149107, -5.19886284732787, 1), cube.Position());
+ }
+
+ //Centered rotation (no change)
+ [TestMethod]
+ public void Interpolation_CenteredCubePositionNotUpdatedWhenRotated()
+ {
+ var cube = new Cube(5, 20, 20, true).Rotate(15, -120, 270);
+
+ Assert.AreEqual(new Vector3(), cube.Position());
+ }
+
+ //X and Y rotation
+ [TestMethod]
+ public void Interpolation_XAndYRotation()
+ {
+ var cube = new Cube(5, 5, 5).Rotate(120, 45, 0);
+
+ Assert.AreEqual(new Vector3(2.41481456572267, -3.4150635094611, -1.12071934021007), cube.Position());
+ }
+
+ //Y and Z rotation
+ [TestMethod]
+ public void Interpolation_YandZRotation()
+ {
+ var cube = new Cube(13, 13, 13).Rotate(0, 270, -35);
+
+ Assert.AreEqual(new Vector3(-1.59624145159665, 9.05273512416025, 6.5), cube.Position());
+ }
+
+ //X and Z rotation
+ [TestMethod]
+ public void Interpolation_XandZRotation()
+ {
+ var cube = new Cube(13, 13, 13).Rotate(-145, 0, 190);
+
+ Assert.AreEqual(new Vector3(-6.67843481376553, 0.443277802376793, -9.05273512416025), cube.Position());
+ }
+
+ //X, Y and Z rotation
+ [TestMethod]
+ public void Interpolation_XYZRotation()
+ {
+ var cube = new Cube(13, 13, 13).Rotate(90, 37.5, -180);
+
+ Assert.AreEqual(new Vector3(-9.11374600044971, 6.5, 1.19984742333634), cube.Position());
+ }
+ }
+}
diff --git a/OSCADSharp/OSCADSharp.UnitTests/OSCADSharp.UnitTests.csproj b/OSCADSharp/OSCADSharp.UnitTests/OSCADSharp.UnitTests.csproj
index 31cac6c..bdc0d30 100644
--- a/OSCADSharp/OSCADSharp.UnitTests/OSCADSharp.UnitTests.csproj
+++ b/OSCADSharp/OSCADSharp.UnitTests/OSCADSharp.UnitTests.csproj
@@ -55,6 +55,7 @@
+