ProceduralTorusGenerator.cs

/*
-----------------------------------------------------------------------------
This source file is part of mogre-procedural
For the latest info, see http://code.google.com/p/mogre-procedural/
my blog:http://hi.baidu.com/rainssoft
this is overwrite  ogre-procedural c++ project using c#, look  ogre-procedural c++ source http://code.google.com/p/ogre-procedural/
   
Copyright (c) 2013-2020 rains soft

Permission is hereby granted, free of charge, to any person obtaining a copy
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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THE SOFTWARE.
-----------------------------------------------------------------------------
*/

namespace Mogre_Procedural
{
    using System;
    using System.Collections.Generic;
    using System.Text;

    using Mogre;
    using Math = Mogre.Math;
    //*
    // * \ingroup objgengrp
    // * Builds a torus mesh whose axis is Y
    // * \image html primitive_torus.png
    // 
    //C++ TO C# CONVERTER WARNING: The original type declaration contained unconverted modifiers:
    //ORIGINAL LINE: class _ProceduralExport TorusGenerator : public MeshGenerator<TorusGenerator>
    /// <summary>
    /// Ô²»· Ô²»·Ìå »·Ãæ 
    /// </summary>
    public class TorusGenerator : MeshGenerator<TorusGenerator>
    {
        private uint mNumSegSection;
        private uint mNumSegCircle;
        private float mRadius = 0f;
        private float mSectionRadius = 0f;
        /// Constructor with arguments
        public TorusGenerator(float radius, float sectionRadius, uint numSegSection)
            : this(radius, sectionRadius, numSegSection, 16) {
        }
        public TorusGenerator(float radius, float sectionRadius)
            : this(radius, sectionRadius, 16, 16) {
        }
        public TorusGenerator(float radius)
            : this(radius, .2f, 16, 16) {
        }
        public TorusGenerator()
            : this(1.0f, 0.2f, 16, 16) {
        }
       //
        //ORIGINAL LINE: TorusGenerator(Ogre::float radius=1.0f, Ogre::float sectionRadius=.2f, uint numSegSection=16, uint numSegCircle=16) : mNumSegSection(numSegSection), mNumSegCircle(numSegCircle), mRadius(radius), mSectionRadius(sectionRadius)
        public TorusGenerator(float radius, float sectionRadius, uint numSegSection, uint numSegCircle) {
            mNumSegSection = numSegSection;
            mNumSegCircle = numSegCircle;
            mRadius = radius;
            mSectionRadius = sectionRadius;
        }

        //    *
        //	 * Builds the mesh into the given TriangleBuffer
        //	 * @param buffer The TriangleBuffer on where to append the mesh.
        //	 
        //
        //ORIGINAL LINE: void addToTriangleBuffer(TriangleBuffer& buffer) const
        public override void addToTriangleBuffer(ref TriangleBuffer buffer) {
            buffer.rebaseOffset();
            buffer.estimateVertexCount((mNumSegCircle + 1) * (mNumSegSection + 1));
            buffer.estimateIndexCount((mNumSegCircle) * (mNumSegSection + 1) * 6);

            float deltaSection = (Math.TWO_PI / mNumSegSection);
            float deltaCircle = (Math.TWO_PI / mNumSegCircle);
            int offset = 0;

            for (uint i = 0; i <= mNumSegCircle; i++)
                for (uint j = 0; j <= mNumSegSection; j++) {
                    Vector3 c0 = new Vector3(mRadius, 0.0f, 0.0f);
                    Vector3 v0 = new Vector3(mRadius + mSectionRadius * cosf(j * deltaSection), mSectionRadius * sinf(j * deltaSection), 0.0f);
                    Quaternion q = new Quaternion();
                    q.FromAngleAxis(new Radian(i * deltaCircle), Vector3.UNIT_Y);
                    Vector3 v = q * v0;
                    Vector3 c = q * c0;
                    addPoint(ref buffer, v, (v - c).NormalisedCopy, new Vector2(i / (float)mNumSegCircle, j / (float)mNumSegSection));

                    if (i != mNumSegCircle) {
                        buffer.index(offset + (int)mNumSegSection + 1);
                        buffer.index(offset);
                        buffer.index(offset + (int)mNumSegSection);
                        buffer.index(offset + (int)mNumSegSection + 1);
                        buffer.index(offset + 1);
                        buffer.index(offset);
                    }
                    offset++;
                }
        }

        //    *
        //	Sets the number of segments on the section circle
        //	\exception Ogre::InvalidParametersException Minimum of numSegSection is 1
        //	
        public TorusGenerator setNumSegSection(uint numSegSection) {
          if (mNumSegSection == 0)
			OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "There must be more than 0 segments", "Procedural::TorusGenerator::setNumSegSection(unsigned int)");

            ;
            mNumSegSection = numSegSection;
            return this;
        }

        //    *
        //	Sets the number of segments along the guiding circle
        //	\exception Ogre::InvalidParametersException Minimum of numSegCircle is 1
        //	
        public TorusGenerator setNumSegCircle(uint numSegCircle) {
           	if (numSegCircle == 0)
			OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "There must be more than 0 segments", "Procedural::TorusGenerator::setNumSegCircle(unsigned int)");

            ;
            mNumSegCircle = numSegCircle;
            return this;
        }

        //    *
        //	Sets the radius of the guiding circle
        //	\exception Ogre::InvalidParametersException Radius must be larger than 0!
        //	
        public TorusGenerator setRadius(float radius) {
           	if (radius <= 0.0f)
			OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "Radius must be larger than 0!", "Procedural::TorusGenerator::setRadius(Ogre::Real)");

            ;
            mRadius = radius;
            return this;
        }

        //    *
        //	Sets the radius of the section circle
        //	\exception Ogre::InvalidParametersException Radius must be larger than 0!
        //	
        public TorusGenerator setSectionRadius(float sectionRadius) {
          if (sectionRadius <= 0.0f)
			OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "Radius must be larger than 0!", "Procedural::TorusGenerator::setSectionRadius(Ogre::Real)");

            ;
            mSectionRadius = sectionRadius;
            return this;
        }

    }
}