/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

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 *

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 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <sdr/contact/viewcontactofe3dpolygon.hxx>

#include <polygn3d.hxx>

#include <drawinglayer/primitive3d/sdrpolypolygonprimitive3d.hxx>

#include <sdr/primitive2d/sdrattributecreator.hxx>

#include <sdr/primitive3d/sdrattributecreator3d.hxx>

#include <basegfx/polygon/b3dpolygon.hxx>

#include <basegfx/polygon/b3dpolypolygontools.hxx>

namespace sdr::contact

{

        ViewContactOfE3dPolygon::ViewContactOfE3dPolygon(E3dPolygonObj& rPolygon)

        :   ViewContactOfE3d(rPolygon)

        {

        }

        ViewContactOfE3dPolygon::~ViewContactOfE3dPolygon()

        {

        }

        drawinglayer::primitive3d::Primitive3DContainer ViewContactOfE3dPolygon::createViewIndependentPrimitive3DContainer() const

        {

            drawinglayer::primitive3d::Primitive3DContainer xRetval;

            const SfxItemSet& rItemSet = GetE3dPolygonObj().GetMergedItemSet();

            const bool bSuppressFill(GetE3dPolygonObj().GetLineOnly());

            const drawinglayer::attribute::SdrLineFillShadowAttribute3D aAttribute(

                drawinglayer::primitive2d::createNewSdrLineFillShadowAttribute(rItemSet, bSuppressFill));

            // get extrude geometry

            basegfx::B3DPolyPolygon aPolyPolygon3D(GetE3dPolygonObj().GetPolyPolygon3D());

            const basegfx::B3DPolyPolygon aPolyNormals3D(GetE3dPolygonObj().GetPolyNormals3D());

            const basegfx::B2DPolyPolygon aPolyTexture2D(GetE3dPolygonObj().GetPolyTexture2D());

            const bool bNormals(aPolyNormals3D.count() && aPolyNormals3D.count() == aPolyPolygon3D.count());

            const bool bTexture(aPolyTexture2D.count() && aPolyTexture2D.count() == aPolyPolygon3D.count());

            if(bNormals || bTexture)

            {

                for(sal_uInt32 a(0); a < aPolyPolygon3D.count(); a++)

                {

                    basegfx::B3DPolygon aCandidate3D(aPolyPolygon3D.getB3DPolygon(a));

                    basegfx::B3DPolygon aNormals3D;

                    basegfx::B2DPolygon aTexture2D;

                    if(bNormals)

                    {

                        aNormals3D = aPolyNormals3D.getB3DPolygon(a);

                    }

                    if(bTexture)

                    {

                        aTexture2D = aPolyTexture2D.getB2DPolygon(a);

                    }

                    for(sal_uInt32 b(0); b < aCandidate3D.count(); b++)

                    {

                        if(bNormals)

                        {

                            sal_uInt32 nNormalCount = aNormals3D.count();

                            if( b < nNormalCount )

                                aCandidate3D.setNormal(b, aNormals3D.getB3DPoint(b));

                            else if( nNormalCount > 0 )

                                aCandidate3D.setNormal(b, aNormals3D.getB3DPoint(0));

                        }

                        if(bTexture)

                        {

                            sal_uInt32 nTextureCount = aTexture2D.count();

                            if( b < nTextureCount )

                                aCandidate3D.setTextureCoordinate(b, aTexture2D.getB2DPoint(b));

                            else if( nTextureCount > 0 )

                                aCandidate3D.setTextureCoordinate(b, aTexture2D.getB2DPoint(0));

                        }

                    }

                    aPolyPolygon3D.setB3DPolygon(a, aCandidate3D);

                }

            }

            // get 3D Object Attributes

            drawinglayer::attribute::Sdr3DObjectAttribute aSdr3DObjectAttribute(drawinglayer::primitive2d::createNewSdr3DObjectAttribute(rItemSet));

            // calculate texture size

            basegfx::B2DVector aTextureSize(1.0, 1.0);

            if(bTexture)

            {

                // #i98314#

                // create texture size from object's size

                const basegfx::B3DRange aObjectRange(basegfx::utils::getRange(aPolyPolygon3D));

                double fWidth(0.0);

                double fHeight(0.0);

                // this is a polygon object, so Width/Height and/or Depth may be zero (e.g. left

                // wall of chart). Take this into account

                if(basegfx::fTools::equalZero(aObjectRange.getWidth()))

                {

                    // width is zero, use height and depth

                    fWidth = aObjectRange.getHeight();

                    fHeight = aObjectRange.getDepth();

                }

                else if(basegfx::fTools::equalZero(aObjectRange.getHeight()))

                {

                    // height is zero, use width and depth

                    fWidth = aObjectRange.getWidth();

                    fHeight = aObjectRange.getDepth();

                }

                else

                {

                    // use width and height

                    fWidth = aObjectRange.getWidth();

                    fHeight = aObjectRange.getHeight();

                }

                if(fWidth <= 0.0 || fHeight <= 0.0)

                {

                    // no texture; fallback to very small size

                    aTextureSize.setX(0.01);

                    aTextureSize.setY(0.01);

                }

                else

                {

                    aTextureSize.setX(fWidth);

                    aTextureSize.setY(fHeight);

                }

            }

            // #i98295#

            // unfortunately, this SdrObject type which allows a free 3d geometry definition was defined

            // wrong topologically in relation to its plane normal and 3D visibility when it was invented

            // a long time ago. Since the API allows creation of this SDrObject type, it is not possible to

            // simply change this definition. Only the chart should use it, and at least this object type

            // only exists at Runtime (is not saved and/or loaded in any FileFormat). Still someone external

            // may have used it in its API. To not risk wrong 3D lightings, I have to switch the orientation

            // of the polygon here

            aPolyPolygon3D.flip();

            // create primitive and add

            const basegfx::B3DHomMatrix aWorldTransform;

            const drawinglayer::primitive3d::Primitive3DReference xReference(

                new drawinglayer::primitive3d::SdrPolyPolygonPrimitive3D(

                    std::move(aPolyPolygon3D), aWorldTransform, aTextureSize, aAttribute, aSdr3DObjectAttribute));

            xRetval = { xReference };

            return xRetval;

        }

} // end of namespace

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