opensim/OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs

/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System.Collections.Generic;
using NUnit.Framework;
using OpenSim.Framework;
using OpenSim.Tests.Common;
using OpenSim.Region.ScriptEngine.Shared;
using OpenSim.Region.Framework.Scenes;
using Nini.Config;
using OpenSim.Region.ScriptEngine.Shared.Api;
using OpenSim.Region.ScriptEngine.Shared.ScriptBase;
using OpenMetaverse;
using System;
using OpenSim.Tests.Common.Mock;

namespace OpenSim.Region.ScriptEngine.Shared.Tests
{
    /// <summary>
    /// Tests for LSL_Api
    /// </summary>
    [TestFixture, LongRunning]
    public class LSL_ApiTest
    {

        private const double ANGLE_ACCURACY_IN_RADIANS = 1E-6;
        private const double VECTOR_COMPONENT_ACCURACY = 0.0000005d;
        private const double FLOAT_ACCURACY = 0.00005d;
        private LSL_Api m_lslApi;

        [SetUp]
        public void SetUp()
        {

            IConfigSource initConfigSource = new IniConfigSource();
            IConfig config = initConfigSource.AddConfig("XEngine");
            config.Set("Enabled", "true");

            Scene scene = SceneHelpers.SetupScene();
            SceneObjectPart part = SceneHelpers.AddSceneObject(scene);

            XEngine.XEngine engine = new XEngine.XEngine();
            engine.Initialise(initConfigSource);
            engine.AddRegion(scene);

            m_lslApi = new LSL_Api();
            m_lslApi.Initialize(engine, part, part.LocalId, part.UUID);

        }

        [Test]
        public void TestllAngleBetween()
        {
            CheckllAngleBetween(new Vector3(1, 0, 0), 0);
            CheckllAngleBetween(new Vector3(1, 0, 0), 90);
            CheckllAngleBetween(new Vector3(1, 0, 0), 180);

            CheckllAngleBetween(new Vector3(0, 1, 0), 0);
            CheckllAngleBetween(new Vector3(0, 1, 0), 90);
            CheckllAngleBetween(new Vector3(0, 1, 0), 180);

            CheckllAngleBetween(new Vector3(0, 0, 1), 0);
            CheckllAngleBetween(new Vector3(0, 0, 1), 90);
            CheckllAngleBetween(new Vector3(0, 0, 1), 180);

            CheckllAngleBetween(new Vector3(1, 1, 1), 0);
            CheckllAngleBetween(new Vector3(1, 1, 1), 90);
            CheckllAngleBetween(new Vector3(1, 1, 1), 180);
        }

        private void CheckllAngleBetween(Vector3 axis,float originalAngle)
        {
            Quaternion rotation1 = Quaternion.CreateFromAxisAngle(axis, 0);
            Quaternion rotation2 = Quaternion.CreateFromAxisAngle(axis, ToRadians(originalAngle));

            double deducedAngle = FromLslFloat(m_lslApi.llAngleBetween(ToLslQuaternion(rotation2), ToLslQuaternion(rotation1)));

            Assert.Greater(deducedAngle, ToRadians(originalAngle) - ANGLE_ACCURACY_IN_RADIANS);
            Assert.Less(deducedAngle, ToRadians(originalAngle) + ANGLE_ACCURACY_IN_RADIANS);
        }

        #region Conversions to and from LSL_Types

        private float ToRadians(double degrees)
        {
            return (float)(Math.PI * degrees / 180);
        }

        // private double FromRadians(float radians)
        // {
        //     return radians * 180 / Math.PI;
        // }

        private double FromLslFloat(LSL_Types.LSLFloat lslFloat)
        {
            return lslFloat.value;
        }

        // private LSL_Types.LSLFloat ToLslFloat(double value)
        // {
        //     return new LSL_Types.LSLFloat(value);
        // }

        // private Quaternion FromLslQuaternion(LSL_Types.Quaternion lslQuaternion)
        // {
        //     return new Quaternion((float)lslQuaternion.x, (float)lslQuaternion.y, (float)lslQuaternion.z, (float)lslQuaternion.s);
        // }

        private LSL_Types.Quaternion ToLslQuaternion(Quaternion quaternion)
        {
            return new LSL_Types.Quaternion(quaternion.X, quaternion.Y, quaternion.Z, quaternion.W);
        }

        #endregion

        [Test]
        // llRot2Euler test.
        public void TestllRot2Euler()
        {
            // 180, 90 and zero degree rotations.
            CheckllRot2Euler(new LSL_Types.Quaternion(1.0f, 0.0f, 0.0f, 0.0f), new LSL_Types.Vector3(Math.PI, 0.0f, 0.0f));
            CheckllRot2Euler(new LSL_Types.Quaternion(0.0f, 1.0f, 0.0f, 0.0f), new LSL_Types.Vector3(Math.PI, 0.0f, Math.PI));
            CheckllRot2Euler(new LSL_Types.Quaternion(0.0f, 0.0f, 1.0f, 0.0f), new LSL_Types.Vector3(0.0f, 0.0f, Math.PI));
            CheckllRot2Euler(new LSL_Types.Quaternion(0.0f, 0.0f, 0.0f, 1.0f), new LSL_Types.Vector3(0.0f, 0.0f, 0.0f));
            CheckllRot2Euler(new LSL_Types.Quaternion(-0.5f, -0.5f, 0.5f, 0.5f), new LSL_Types.Vector3(0, -Math.PI / 2.0f, Math.PI / 2.0f));
            CheckllRot2Euler(new LSL_Types.Quaternion(-0.707107f, 0.0f, 0.0f, -0.707107f), new LSL_Types.Vector3(Math.PI / 2.0f, 0.0f, 0.0f));
            // A couple of messy rotations.
            CheckllRot2Euler(new LSL_Types.Quaternion(1.0f, 5.651f, -3.1f, 67.023f), new LSL_Types.Vector3(0.037818f, 0.166447f, -0.095595f));
            CheckllRot2Euler(new LSL_Types.Quaternion(0.719188f, -0.408934f, -0.363998f, -0.427841f), new LSL_Types.Vector3(-1.954769f, -0.174533f, 1.151917f));
        }

        private void CheckllRot2Euler(LSL_Types.Quaternion rot, LSL_Types.Vector3 eulerCheck)
        {
            // Call LSL function to convert quaternion rotaion to euler radians.
            LSL_Types.Vector3 eulerCalc = m_lslApi.llRot2Euler(rot);
            // Check upper and lower bounds of x, y and z.
            // This type of check is performed as opposed to comparing for equal numbers, in order to allow slight
            // differences in accuracy.
            Assert.Greater(eulerCalc.x, eulerCheck.x - ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler X lower bounds check fail");
            Assert.Less(eulerCalc.x, eulerCheck.x + ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler X upper bounds check fail");
            Assert.Greater(eulerCalc.y, eulerCheck.y - ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler Y lower bounds check fail");
            Assert.Less(eulerCalc.y, eulerCheck.y + ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler Y upper bounds check fail");
            Assert.Greater(eulerCalc.z, eulerCheck.z - ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler Z lower bounds check fail");
            Assert.Less(eulerCalc.z, eulerCheck.z + ANGLE_ACCURACY_IN_RADIANS, "TestllRot2Euler Z upper bounds check fail");
        }

        [Test]
        // llSetPrimitiveParams and llGetPrimitiveParams test.
        public void TestllSetPrimitiveParams()
        {
            // Create Prim1.
            Scene scene = SceneHelpers.SetupScene();
            string obj1Name = "Prim1";
            UUID objUuid = new UUID("00000000-0000-0000-0000-000000000001");
            SceneObjectPart part1 =
                new SceneObjectPart(UUID.Zero, PrimitiveBaseShape.Default,
                Vector3.Zero, Quaternion.Identity,
                Vector3.Zero) { Name = obj1Name, UUID = objUuid };
            Assert.That(scene.AddNewSceneObject(new SceneObjectGroup(part1), false), Is.True);

            // Note that prim hollow check is passed with the other prim params in order to allow the
            // specification of a different check value from the prim param. A cylinder, prism, sphere,
            // torus or ring, with a hole shape of square, is limited to a hollow of 70%. Test 5 below
            // specifies a value of 95% and checks to see if 70% was properly returned.

            // Test a sphere.
            CheckllSetPrimitiveParams(
                "test 1",                                   // Prim test identification string
                new LSL_Types.Vector3(6.0d, 9.9d, 9.9d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_SPHERE,           // Prim type
                ScriptBaseClass.PRIM_HOLE_DEFAULT,          // Prim hole type
                new LSL_Types.Vector3(0.0d, 0.075d, 0.0d),  // Prim cut
                0.80d,                                      // Prim hollow
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim twist
                new LSL_Types.Vector3(0.32d, 0.76d, 0.0d),  // Prim dimple
                0.80d);                                     // Prim hollow check

            // Test a prism.
            CheckllSetPrimitiveParams(
                "test 2",                                   // Prim test identification string
                new LSL_Types.Vector3(3.5d, 3.5d, 3.5d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_PRISM,            // Prim type
                ScriptBaseClass.PRIM_HOLE_CIRCLE,           // Prim hole type
                new LSL_Types.Vector3(0.0d, 1.0d, 0.0d),    // Prim cut
                0.90d,                                      // Prim hollow
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim twist
                new LSL_Types.Vector3(2.0d, 1.0d, 0.0d),    // Prim taper 
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim shear
                0.90d);                                     // Prim hollow check

            // Test a box.
            CheckllSetPrimitiveParams(
                "test 3",                                   // Prim test identification string
                new LSL_Types.Vector3(3.5d, 3.5d, 3.5d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_BOX,              // Prim type
                ScriptBaseClass.PRIM_HOLE_TRIANGLE,         // Prim hole type
                new LSL_Types.Vector3(0.0d, 1.0d, 0.0d),    // Prim cut
                0.95d,                                      // Prim hollow
                new LSL_Types.Vector3(1.0d, 0.0d, 0.0d),    // Prim twist
                new LSL_Types.Vector3(1.0d, 1.0d, 0.0d),    // Prim taper 
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim shear
                0.95d);                                     // Prim hollow check

            // Test a tube.
            CheckllSetPrimitiveParams(
                "test 4",                                   // Prim test identification string
                new LSL_Types.Vector3(4.2d, 4.2d, 4.2d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_TUBE,             // Prim type
                ScriptBaseClass.PRIM_HOLE_SQUARE,           // Prim hole type
                new LSL_Types.Vector3(0.0d, 1.0d, 0.0d),    // Prim cut
                0.00d,                                      // Prim hollow
                new LSL_Types.Vector3(1.0d, -1.0d, 0.0d),   // Prim twist
                new LSL_Types.Vector3(1.0d, 0.5d, 0.0d),    // Prim hole size
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim shear
                new LSL_Types.Vector3(0.0d, 1.0d, 0.0d),    // Prim profile cut
                new LSL_Types.Vector3(-1.0d, 1.0d, 0.0d),   // Prim taper
                1.0d,                                       // Prim revolutions
                1.0d,                                       // Prim radius
                0.0d,                                       // Prim skew
                0.00d);                                     // Prim hollow check

            // Test a prism.
            CheckllSetPrimitiveParams(
                "test 5",                                   // Prim test identification string
                new LSL_Types.Vector3(3.5d, 3.5d, 3.5d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_PRISM,            // Prim type
                ScriptBaseClass.PRIM_HOLE_SQUARE,           // Prim hole type
                new LSL_Types.Vector3(0.0d, 1.0d, 0.0d),    // Prim cut
                0.95d,                                      // Prim hollow
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim twist
                new LSL_Types.Vector3(2.0d, 1.0d, 0.0d),    // Prim taper 
                new LSL_Types.Vector3(0.0d, 0.0d, 0.0d),    // Prim shear
                0.70d);                                     // Prim hollow check

            // Test a sculpted prim.
            CheckllSetPrimitiveParams(
                "test 6",                                   // Prim test identification string
                new LSL_Types.Vector3(2.0d, 2.0d, 2.0d),    // Prim size
                ScriptBaseClass.PRIM_TYPE_SCULPT,           // Prim type
                "be293869-d0d9-0a69-5989-ad27f1946fd4",     // Prim map
                ScriptBaseClass.PRIM_SCULPT_TYPE_SPHERE);   // Prim sculpt type
        }

        // Set prim params for a box, cylinder or prism and check results.
        public void CheckllSetPrimitiveParams(string primTest,
            LSL_Types.Vector3 primSize, int primType, int primHoleType, LSL_Types.Vector3 primCut,
            double primHollow, LSL_Types.Vector3 primTwist, LSL_Types.Vector3 primTaper, LSL_Types.Vector3 primShear,
            double primHollowCheck)
        {
            // Set the prim params.
            m_lslApi.llSetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, primSize,
                ScriptBaseClass.PRIM_TYPE, primType, primHoleType,
                primCut, primHollow, primTwist, primTaper, primShear));

            // Get params for prim to validate settings.
            LSL_Types.list primParams =
                m_lslApi.llGetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, ScriptBaseClass.PRIM_TYPE));

            // Validate settings.
            CheckllSetPrimitiveParamsVector(primSize, m_lslApi.llList2Vector(primParams, 0), primTest + " prim size");
            Assert.AreEqual(primType, m_lslApi.llList2Integer(primParams, 1),
                "TestllSetPrimitiveParams " + primTest + " prim type check fail");
            Assert.AreEqual(primHoleType, m_lslApi.llList2Integer(primParams, 2),
                "TestllSetPrimitiveParams " + primTest + " prim hole default check fail");
            CheckllSetPrimitiveParamsVector(primCut, m_lslApi.llList2Vector(primParams, 3), primTest + " prim cut");
            Assert.AreEqual(primHollowCheck, m_lslApi.llList2Float(primParams, 4), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim hollow check fail");
            CheckllSetPrimitiveParamsVector(primTwist, m_lslApi.llList2Vector(primParams, 5), primTest + " prim twist");
            CheckllSetPrimitiveParamsVector(primTaper, m_lslApi.llList2Vector(primParams, 6), primTest + " prim taper");
            CheckllSetPrimitiveParamsVector(primShear, m_lslApi.llList2Vector(primParams, 7), primTest + " prim shear");
        }

        // Set prim params for a sphere and check results.
        public void CheckllSetPrimitiveParams(string primTest,
            LSL_Types.Vector3 primSize, int primType, int primHoleType, LSL_Types.Vector3 primCut,
            double primHollow, LSL_Types.Vector3 primTwist, LSL_Types.Vector3 primDimple, double primHollowCheck)
        {
            // Set the prim params.
            m_lslApi.llSetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, primSize,
                ScriptBaseClass.PRIM_TYPE, primType, primHoleType,
                primCut, primHollow, primTwist, primDimple));

            // Get params for prim to validate settings.
            LSL_Types.list primParams =
                m_lslApi.llGetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, ScriptBaseClass.PRIM_TYPE));

            // Validate settings.
            CheckllSetPrimitiveParamsVector(primSize, m_lslApi.llList2Vector(primParams, 0), primTest + " prim size");
            Assert.AreEqual(primType, m_lslApi.llList2Integer(primParams, 1),
                "TestllSetPrimitiveParams " + primTest + " prim type check fail");
            Assert.AreEqual(primHoleType, m_lslApi.llList2Integer(primParams, 2),
                "TestllSetPrimitiveParams " + primTest + " prim hole default check fail");
            CheckllSetPrimitiveParamsVector(primCut, m_lslApi.llList2Vector(primParams, 3), primTest + " prim cut");
            Assert.AreEqual(primHollowCheck, m_lslApi.llList2Float(primParams, 4), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim hollow check fail");
            CheckllSetPrimitiveParamsVector(primTwist, m_lslApi.llList2Vector(primParams, 5), primTest + " prim twist");
            CheckllSetPrimitiveParamsVector(primDimple, m_lslApi.llList2Vector(primParams, 6), primTest + " prim dimple");
        }

        // Set prim params for a torus, tube or ring and check results.
        public void CheckllSetPrimitiveParams(string primTest,
            LSL_Types.Vector3 primSize, int primType, int primHoleType, LSL_Types.Vector3 primCut,
            double primHollow, LSL_Types.Vector3 primTwist, LSL_Types.Vector3 primHoleSize,
            LSL_Types.Vector3 primShear, LSL_Types.Vector3 primProfCut, LSL_Types.Vector3 primTaper,
            double primRev, double primRadius, double primSkew, double primHollowCheck)
        {
            // Set the prim params.
            m_lslApi.llSetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, primSize,
                ScriptBaseClass.PRIM_TYPE, primType, primHoleType,
                primCut, primHollow, primTwist, primHoleSize, primShear, primProfCut,
                primTaper, primRev, primRadius, primSkew));

            // Get params for prim to validate settings.
            LSL_Types.list primParams =
                m_lslApi.llGetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, ScriptBaseClass.PRIM_TYPE));

            // Valdate settings.
            CheckllSetPrimitiveParamsVector(primSize, m_lslApi.llList2Vector(primParams, 0), primTest + " prim size");
            Assert.AreEqual(primType, m_lslApi.llList2Integer(primParams, 1),
                "TestllSetPrimitiveParams " + primTest + " prim type check fail");
            Assert.AreEqual(primHoleType, m_lslApi.llList2Integer(primParams, 2),
                "TestllSetPrimitiveParams " + primTest + " prim hole default check fail");
            CheckllSetPrimitiveParamsVector(primCut, m_lslApi.llList2Vector(primParams, 3), primTest + " prim cut");
            Assert.AreEqual(primHollowCheck, m_lslApi.llList2Float(primParams, 4), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim hollow check fail");
            CheckllSetPrimitiveParamsVector(primTwist, m_lslApi.llList2Vector(primParams, 5), primTest + " prim twist");
            CheckllSetPrimitiveParamsVector(primHoleSize, m_lslApi.llList2Vector(primParams, 6), primTest + " prim hole size");
            CheckllSetPrimitiveParamsVector(primShear, m_lslApi.llList2Vector(primParams, 7), primTest + " prim shear");
            CheckllSetPrimitiveParamsVector(primProfCut, m_lslApi.llList2Vector(primParams, 8), primTest + " prim profile cut");
            CheckllSetPrimitiveParamsVector(primTaper, m_lslApi.llList2Vector(primParams, 9), primTest + " prim taper");
            Assert.AreEqual(primRev, m_lslApi.llList2Float(primParams, 10), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim revolution fail");
            Assert.AreEqual(primRadius, m_lslApi.llList2Float(primParams, 11), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim radius fail");
            Assert.AreEqual(primSkew, m_lslApi.llList2Float(primParams, 12), FLOAT_ACCURACY,
                "TestllSetPrimitiveParams " + primTest + " prim skew fail");
        }

        // Set prim params for a sculpted prim and check results.
        public void CheckllSetPrimitiveParams(string primTest,
            LSL_Types.Vector3 primSize, int primType, string primMap, int primSculptType)
        {
            // Set the prim params.
            m_lslApi.llSetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, primSize,
                ScriptBaseClass.PRIM_TYPE, primType, primMap, primSculptType));

            // Get params for prim to validate settings.
            LSL_Types.list primParams =
                m_lslApi.llGetPrimitiveParams(new LSL_Types.list(ScriptBaseClass.PRIM_SIZE, ScriptBaseClass.PRIM_TYPE));

            // Validate settings.
            CheckllSetPrimitiveParamsVector(primSize, m_lslApi.llList2Vector(primParams, 0), primTest + " prim size");
            Assert.AreEqual(primType, m_lslApi.llList2Integer(primParams, 1),
                "TestllSetPrimitiveParams " + primTest + " prim type check fail");
            Assert.AreEqual(primMap, (string)m_lslApi.llList2String(primParams, 2),
                "TestllSetPrimitiveParams " + primTest + " prim map check fail");
            Assert.AreEqual(primSculptType, m_lslApi.llList2Integer(primParams, 3),
                "TestllSetPrimitiveParams " + primTest + " prim type scuplt check fail");
        }

        public void CheckllSetPrimitiveParamsVector(LSL_Types.Vector3 vecCheck, LSL_Types.Vector3 vecReturned, string msg)
        {
            // Check each vector component against expected result.
            Assert.AreEqual(vecCheck.x, vecReturned.x, VECTOR_COMPONENT_ACCURACY,
                "TestllSetPrimitiveParams " + msg + " vector check fail on x component");
            Assert.AreEqual(vecCheck.y, vecReturned.y, VECTOR_COMPONENT_ACCURACY,
                "TestllSetPrimitiveParams " + msg + " vector check fail on y component");
            Assert.AreEqual(vecCheck.z, vecReturned.z, VECTOR_COMPONENT_ACCURACY,
                "TestllSetPrimitiveParams " + msg + " vector check fail on z component");
        }

        [Test]
        // llVecNorm test.
        public void TestllVecNorm()
        {
            // Check special case for normalizing zero vector.
            CheckllVecNorm(new LSL_Types.Vector3(0.0d, 0.0d, 0.0d), new LSL_Types.Vector3(0.0d, 0.0d, 0.0d));
            // Check various vectors.
            CheckllVecNorm(new LSL_Types.Vector3(10.0d, 25.0d, 0.0d), new LSL_Types.Vector3(0.371391d, 0.928477d, 0.0d));
            CheckllVecNorm(new LSL_Types.Vector3(1.0d, 0.0d, 0.0d), new LSL_Types.Vector3(1.0d, 0.0d, 0.0d));
            CheckllVecNorm(new LSL_Types.Vector3(-90.0d, 55.0d, 2.0d), new LSL_Types.Vector3(-0.853128d, 0.521356d, 0.018958d));
            CheckllVecNorm(new LSL_Types.Vector3(255.0d, 255.0d, 255.0d), new LSL_Types.Vector3(0.577350d, 0.577350d, 0.577350d));
        }

        public void CheckllVecNorm(LSL_Types.Vector3 vec, LSL_Types.Vector3 vecNormCheck)
        {
            // Call LSL function to normalize the vector.
            LSL_Types.Vector3 vecNorm = m_lslApi.llVecNorm(vec);
            // Check each vector component against expected result.
            Assert.AreEqual(vecNorm.x, vecNormCheck.x, VECTOR_COMPONENT_ACCURACY, "TestllVecNorm vector check fail on x component");
            Assert.AreEqual(vecNorm.y, vecNormCheck.y, VECTOR_COMPONENT_ACCURACY, "TestllVecNorm vector check fail on y component");
            Assert.AreEqual(vecNorm.z, vecNormCheck.z, VECTOR_COMPONENT_ACCURACY, "TestllVecNorm vector check fail on z component");
        }
    }
}