public void TestDistance1D()
        {
            ImageRaster3D <bool> mask = new ImageRaster3D <bool>(5, 1, 1);

            mask[0] = true;
            mask[3] = true;
            ImageRaster3D <float> distance = ToolsDistance.DistanceTransform3D(mask, new float[] { 1.5f, 1.5f, 1.5f });

            Assert.AreEqual(0.0f, distance[0]);
            Assert.AreEqual(1.5f, distance[1]);
            Assert.AreEqual(1.5f, distance[2]);
            Assert.AreEqual(0.0f, distance[3]);
            Assert.AreEqual(1.5f, distance[4]);
        }
        public void TestDistance2D()
        {
            ImageRaster3D <bool> mask = new ImageRaster3D <bool>(5, 5, 1);

            mask[0]  = true;
            mask[6]  = true;
            mask[12] = true;
            mask[13] = true;
            mask[19] = true;
            ImageRaster3D <float> distance = ToolsDistance.DistanceTransform3D(mask, new float[] { 1.0f, 1.0f, 1.0f });

            Assert.AreEqual(0.0f, distance[0]);
            Assert.AreEqual(1.0f, distance[1]);
            Assert.AreEqual(ToolsMath.Sqrt(2.0f), distance[2]);
            Assert.AreEqual(2.0f, distance[3]);
            Assert.AreEqual(ToolsMath.Sqrt(5.0f), distance[4]);
            Assert.AreEqual(ToolsMath.Sqrt(8.0f), distance[20]);
        }