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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* 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 "helperminimaldepth3d.hxx"
#include <drawinglayer/processor3d/baseprocessor3d.hxx>
#include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
#include <drawinglayer/primitive3d/transformprimitive3d.hxx>
#include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
#include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
#include <svx/sdr/contact/viewcontactofe3d.hxx>
#include <svx/sdr/contact/viewcontactofe3dscene.hxx>
#include <svx/obj3d.hxx>
#include <svx/scene3d.hxx>
namespace drawinglayer
{
namespace processor3d
{
namespace {
class MinimalDephInViewExtractor : public BaseProcessor3D
{
private:
// the value which will be fetched as result
double mfMinimalDepth;
// as tooling, the process() implementation takes over API handling and calls this
// virtual render method when the primitive implementation is BasePrimitive3D-based.
virtual void processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate) override;
public:
explicit MinimalDephInViewExtractor(const geometry::ViewInformation3D& rViewInformation)
: BaseProcessor3D(rViewInformation),
mfMinimalDepth(DBL_MAX)
{}
// data access
double getMinimalDepth() const { return mfMinimalDepth; }
};
}
void MinimalDephInViewExtractor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
{
// it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
switch(rCandidate.getPrimitive3DID())
{
case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
{
// transform group. Remember current transformations
const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
// create new transformation; add new object transform from right side
const geometry::ViewInformation3D aNewViewInformation3D(
aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
aLastViewInformation3D.getOrientation(),
aLastViewInformation3D.getProjection(),
aLastViewInformation3D.getDeviceToView(),
aLastViewInformation3D.getViewTime(),
aLastViewInformation3D.getExtendedInformationSequence());
updateViewInformation(aNewViewInformation3D);
// let break down
process(rPrimitive.getChildren());
// restore transformations
updateViewInformation(aLastViewInformation3D);
break;
}
case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
{
// PolygonHairlinePrimitive3D
const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
const basegfx::B3DPolygon& rPolygon = rPrimitive.getB3DPolygon();
const sal_uInt32 nCount(rPolygon.count());
for(sal_uInt32 a(0); a < nCount; a++)
{
const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * rPolygon.getB3DPoint(a));
if(aPointInView.getZ() < mfMinimalDepth)
{
mfMinimalDepth = aPointInView.getZ();
}
}
break;
}
case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
{
// PolyPolygonMaterialPrimitive3D
const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
const basegfx::B3DPolyPolygon& rPolyPolygon = rPrimitive.getB3DPolyPolygon();
const sal_uInt32 nPolyCount(rPolyPolygon.count());
for(sal_uInt32 a(0); a < nPolyCount; a++)
{
const basegfx::B3DPolygon& aPolygon(rPolyPolygon.getB3DPolygon(a));
const sal_uInt32 nCount(aPolygon.count());
for(sal_uInt32 b(0); b < nCount; b++)
{
const basegfx::B3DPoint aPointInView(getViewInformation3D().getObjectToView() * aPolygon.getB3DPoint(b));
if(aPointInView.getZ() < mfMinimalDepth)
{
mfMinimalDepth = aPointInView.getZ();
}
}
}
break;
}
default :
{
// process recursively
process(rCandidate.get3DDecomposition(getViewInformation3D()));
break;
}
}
}
} // end of namespace processor3d
} // end of namespace drawinglayer
// changed to create values using VCs, Primitive3DContainer and ViewInformation3D to allow
// removal of old 3D bucket geometry. There is one slight difference in the result, it's
// in [0.0 .. 1.0] for Z-Depth since the scaling of the scene as 2D object is no longer
// part of the 3D transformations. This could be added since the ViewContactOfE3dScene is
// given, but is not needed since the permutation of the depth values needs only be correct
// relative to each other
double getMinimalDepthInViewCoordinates(const E3dCompoundObject& rObject)
{
// this is an E3dCompoundObject, so it cannot be a scene (which is an E3dObject).
// Get primitive sequence using VC
const sdr::contact::ViewContactOfE3d& rVCObject = static_cast< sdr::contact::ViewContactOfE3d& >(rObject.GetViewContact());
const drawinglayer::primitive3d::Primitive3DContainer aPrimitives = rVCObject.getViewIndependentPrimitive3DContainer();
double fRetval(DBL_MAX);
if(!aPrimitives.empty())
{
const E3dScene* pScene(rObject.getRootE3dSceneFromE3dObject());
if(pScene)
{
// get ViewInformation3D from scene using VC
const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(pScene->GetViewContact());
const drawinglayer::geometry::ViewInformation3D& aViewInfo3D(rVCScene.getViewInformation3D());
// the scene's object transformation is already part of aViewInfo3D.getObjectTransformation()
// for historical reasons (see ViewContactOfE3dScene::createViewInformation3D for more info)
// and the object's transform is part of aPrimitives (and taken into account when decomposing
// to PolygonHairlinePrimitive3D and PolyPolygonMaterialPrimitive3D). The missing part may be
// some Scene SdrObjects lying in-between which may need to be added. This is e.g. used in chart,
// and generally allowed in 3d scenes and their 3d object hierarchy
basegfx::B3DHomMatrix aInBetweenSceneMatrix;
E3dScene* pParentScene(rObject.getParentE3dSceneFromE3dObject());
while(pParentScene && pParentScene != pScene)
{
aInBetweenSceneMatrix = pParentScene->GetTransform() * aInBetweenSceneMatrix;
pParentScene = pParentScene->getParentE3dSceneFromE3dObject();
}
// build new ViewInformation containing all transforms
const drawinglayer::geometry::ViewInformation3D aNewViewInformation3D(
aViewInfo3D.getObjectTransformation() * aInBetweenSceneMatrix,
aViewInfo3D.getOrientation(),
aViewInfo3D.getProjection(),
aViewInfo3D.getDeviceToView(),
aViewInfo3D.getViewTime(),
aViewInfo3D.getExtendedInformationSequence());
// create extractor helper, process geometry and get return value
drawinglayer::processor3d::MinimalDephInViewExtractor aExtractor(aNewViewInformation3D);
aExtractor.process(aPrimitives);
fRetval = aExtractor.getMinimalDepth();
}
}
return fRetval;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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