/*
-----------------------------------------------------------------------------
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
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
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.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
//#ifndef PROCEDURAL_CYLINDER_GENERATOR_INCLUDED
#define PROCEDURAL_CYLINDER_GENERATOR_INCLUDED

// write with new std ... ok
namespace Mogre_Procedural
{
    using System;
    using System.Collections.Generic;
    using System.Text;

    using Mogre;
    using Math = Mogre.Math;
    //*
    // * \ingroup objgengrp
    // * Generates a cylinder mesh along Y-axis
    // * \image html primitive_cylinder.png
    // 
    //C++ TO C# CONVERTER WARNING: The original type declaration contained unconverted modifiers:
    //ORIGINAL LINE: class _ProceduralExport CylinderGenerator : public MeshGenerator<CylinderGenerator>
    public class CylinderGenerator : MeshGenerator<CylinderGenerator>
    {
        private uint mNumSegBase;
        private uint mNumSegHeight;
        private bool mCapped;
        private float mRadius = 0f;
        private float mHeight = 0f;

        /// Contructor with arguments
        public CylinderGenerator(float radius, float height, uint numSegBase, uint numSegHeight)
            : this(radius, height, numSegBase, numSegHeight, true) {
        }
        public CylinderGenerator(float radius, float height, uint numSegBase)
            : this(radius, height, numSegBase, 1, true) {
        }
        public CylinderGenerator(float radius, float height)
            : this(radius, height, 16, 1, true) {
        }
        public CylinderGenerator(float radius)
            : this(radius, 1.0f, 16, 1, true) {
        }
        public CylinderGenerator()
            : this(1.0f, 1.0f, 16, 1, true) {
        }
       //
        //ORIGINAL LINE: CylinderGenerator(Ogre::float radius = 1.0f, Ogre::float height = 1.0f, uint numSegBase = 16, uint numSegHeight = 1, bool capped = true) : mNumSegBase(numSegBase), mNumSegHeight(numSegHeight), mCapped(capped), mRadius(radius), mHeight(height)
        public CylinderGenerator(float radius, float height, uint numSegBase, uint numSegHeight, bool capped) {
            mNumSegBase = numSegBase;
            mNumSegHeight = numSegHeight;
            mCapped = capped;
            mRadius = radius;
            mHeight = height;
        }

        //    *
        //	 * 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();
            if (mCapped) {
                buffer.estimateVertexCount((mNumSegHeight + 1) * (mNumSegBase + 1) + 2 * (mNumSegBase + 1) + 2);
                buffer.estimateIndexCount(mNumSegHeight * (mNumSegBase + 1) * 6 + 6 * mNumSegBase);
            }
            else {
                buffer.estimateVertexCount((mNumSegHeight + 1) * (mNumSegBase + 1));
                buffer.estimateIndexCount(mNumSegHeight * (mNumSegBase + 1) * 6);
            }


            float deltaAngle = (Math.TWO_PI / mNumSegBase);
            float deltaHeight = mHeight / (float)mNumSegHeight;
            int offset = 0;

            for (uint i = 0; i <= mNumSegHeight; i++)
                for (uint j = 0; j <= mNumSegBase; j++) {
                    float x0 = mRadius * cosf(j * deltaAngle);
                    float z0 = mRadius * sinf(j * deltaAngle);

                    addPoint(ref buffer, new Vector3(x0, (float)i * deltaHeight, z0), new Vector3(x0, 0f, z0).NormalisedCopy, new Vector2((float)j / (float)mNumSegBase, (float)i / (float)mNumSegHeight));

                    if (i != mNumSegHeight) {
                        buffer.index(offset + (int)mNumSegBase + 1);
                        buffer.index(offset);
                        buffer.index(offset + (int)mNumSegBase);
                        buffer.index(offset + (int)mNumSegBase + 1);
                        buffer.index(offset + 1);
                        buffer.index(offset);
                    }
                    offset++;
                }
            if (mCapped) {
                //low cap
                int centerIndex = offset;
                addPoint(ref buffer, Vector3.ZERO, Vector3.NEGATIVE_UNIT_Y, Vector2.ZERO);
                offset++;
                for (uint j = 0; j <= mNumSegBase; j++) {
                    float x0 = cosf(j * deltaAngle);
                    float z0 = sinf(j * deltaAngle);

                    addPoint(ref buffer, new Vector3(mRadius * x0, 0.0f, mRadius * z0), Vector3.NEGATIVE_UNIT_Y, new Vector2(x0, z0));
                    if (j != mNumSegBase) {
                        buffer.index(centerIndex);
                        buffer.index(offset);
                        buffer.index(offset + 1);
                    }
                    offset++;
                }
                // high cap
                centerIndex = offset;
                addPoint(ref buffer, new Vector3(0, mHeight, 0), Vector3.UNIT_Y, Vector2.ZERO);
                offset++;
                for (uint j = 0; j <= mNumSegBase; j++) {
                    float x0 = cosf(j * deltaAngle);
                    float z0 = sinf(j * deltaAngle);

                    addPoint(ref buffer, new Vector3(x0 * mRadius, mHeight, mRadius * z0), Vector3.UNIT_Y, new Vector2(x0, z0));
                    if (j != mNumSegBase) {
                        buffer.index(centerIndex);
                        buffer.index(offset + 1);
                        buffer.index(offset);
                    }
                    offset++;
                }
            }
        }

        //    *
        //	Sets the number of segments when rotating around the cylinder's axis (default=16)
        //	\exception Ogre::InvalidParametersException Minimum of numSegBase is 1
        //	
        public CylinderGenerator setNumSegBase(uint numSegBase) {
            if (numSegBase == 0)
              OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "There must be more than 0 segments", "Procedural::CylinderGenerator::setNumSegBase(unsigned int)");
            ;
            mNumSegBase = numSegBase;
            return this;
        }

        //    *
        //	Sets the number of segments along the height of the cylinder (default=1)
        //	\exception Ogre::InvalidParametersException Minimum of numSegHeight is 1
        //	
        public CylinderGenerator setNumSegHeight(uint numSegHeight) {
            if (numSegHeight == 0)
             OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "There must be more than 0 segments", "Procedural::CylinderGenerator::setNumSegHeight(unsigned int)");
            ;
            mNumSegHeight = numSegHeight;
            return this;
        }

        //* Sets whether the cylinder has endings or not (default=true) 
        public CylinderGenerator setCapped(bool capped) {
            mCapped = capped;
            return this;
        }

        //    *
        //	Sets the radius of the cylinder (default=1)
        //	\exception Ogre::InvalidParametersException Radius must be larger than 0!
        //	
        public CylinderGenerator setRadius(float radius) {
            if (radius <= 0.0f)
               OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "Radius must be larger than 0!", "Procedural::CylinderGenerator::setRadius(Ogre::Real)");
            ;
            mRadius = radius;
            return this;
        }

        //    *
        //	Sets the height of the cylinder (default=1)
        //	\exception Ogre::InvalidParametersException Height must be larger than 0!
        //	
        public CylinderGenerator setHeight(float height) {
            if (height <= 0.0f)
               OGRE_EXCEPT("Ogre::Exception::ERR_INVALIDPARAMS", "Height must be larger than 0!", "Procedural::CylinderGenerator::setHeight(Ogre::Real)");
            ;
            mHeight = height;
            return this;
        }

    }
}