AcTools.Tests.LutTest.LinearInterpolation C# (CSharp) Method

        public void LinearInterpolation() {
            var lut = new Lut {
                new LutPoint(1d, 1d),
                new LutPoint(2d, 1d),
                new LutPoint(4d, 5d),
                new LutPoint(5d, 3d),
            };

            // points
            Assert.AreEqual(1d, lut.InterpolateLinear(1d));
            Assert.AreEqual(1d, lut.InterpolateLinear(2d));
            Assert.AreEqual(3d, lut.InterpolateLinear(5d));

            // clamping
            Assert.AreEqual(1d, lut.InterpolateLinear(-1d));
            Assert.AreEqual(3d, lut.InterpolateLinear(5.7d));

            // interpolation itself
            Assert.AreEqual(1d, lut.InterpolateLinear(1.5d));
            Assert.AreEqual(2d, lut.InterpolateLinear(2.5d));
            Assert.AreEqual(3d, lut.InterpolateLinear(3d));
            Assert.AreEqual(4d, lut.InterpolateLinear(4.5d));
        }