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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 <sdr/contact/viewcontactofe3d.hxx>
+#include <svx/sdr/contact/viewcontactofe3dscene.hxx>
+#include <svx/obj3d.hxx>
+#include <svx/scene3d.hxx>
+
+
+namespace drawinglayer::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
+
+
+// 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: */