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12ef38e66ffbcb8e8827e012d196b1f4ce84571b
create/src/Gui/ViewProviderGeometryObject.cpp
wmayer 12ef38e66f Fix handling of transparency / Restore colour per face 
The Materials module does a conversion from float to double when saving the transparency and again a conversion from double to float to double
when restoring it. This causes a considerable loss of accuracy so that the representation in percent leads to different numbers.

Using consistently some helper functions to do a proper conversion from float to long and back fixes the problem.

The new property ShapeAppearance is a PropertyMaterialList and always read after the DiffuseColor property when restoring a document.
Thus, the  method onChanged() doesn't override DiffuseColor when restoring a document. Additionally, the method finishRestoring() is re-implemented
to set the colours per face in case DiffuseColor has defined multiple colors.
2024-04-10 13:32:58 +02:00

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/***************************************************************************
* Copyright (c) 2006 Werner Mayer <wmayer[at]users.sourceforge.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include "PreCompiled.h"
#ifndef _PreComp_
#include <Inventor/SoPickedPoint.h>
#include <Inventor/actions/SoRayPickAction.h>
#include <Inventor/actions/SoSearchAction.h>
#include <Inventor/nodes/SoBaseColor.h>
#include <Inventor/nodes/SoCamera.h>
#include <Inventor/nodes/SoDirectionalLight.h>
#include <Inventor/nodes/SoDrawStyle.h>
#include <Inventor/nodes/SoFont.h>
#include <Inventor/nodes/SoMaterial.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoSwitch.h>
#endif
#include <Inventor/nodes/SoResetTransform.h>
#include <App/GeoFeature.h>
#include <App/PropertyGeo.h>
#include "Application.h"
#include "Document.h"
#include "SoFCBoundingBox.h"
#include "SoFCSelection.h"
#include "View3DInventorViewer.h"
#include "ViewProviderGeometryObject.h"
#include "ViewProviderGeometryObjectPy.h"
using namespace Gui;
// Helper functions to consistently convert between float and long
namespace {
float fromPercent(long value)
{
return static_cast<float>(value) / 100.0F;
}
long toPercent(float value)
{
return static_cast<long>(100.0 * value + 0.5);
}
}
PROPERTY_SOURCE(Gui::ViewProviderGeometryObject, Gui::ViewProviderDragger)
const App::PropertyIntegerConstraint::Constraints intPercent = {0, 100, 5};
ViewProviderGeometryObject::ViewProviderGeometryObject()
{
ParameterGrp::handle hGrp =
App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/View");
int initialTransparency = hGrp->GetInt("DefaultShapeTransparency", 0);
static const char* dogroup = "Display Options";
static const char* sgroup = "Selection";
static const char* osgroup = "Object Style";
ADD_PROPERTY_TYPE(Transparency,
(initialTransparency),
osgroup,
App::Prop_None,
"Set object transparency");
Transparency.setConstraints(&intPercent);
App::Material mat(App::Material::DEFAULT);
// This is handled in the material code when using the object appearance
bool randomColor = hGrp->GetBool("RandomColor", false);
float red {};
float green {};
float blue {};
if (randomColor) {
auto fMax = (float)RAND_MAX;
red = (float)rand() / fMax;
green = (float)rand() / fMax;
blue = (float)rand() / fMax;
}
else {
// Color = (204, 204, 230)
unsigned long shcol = hGrp->GetUnsigned("DefaultShapeColor", 3435980543UL);
red = ((shcol >> 24) & 0xff) / 255.0F;
green = ((shcol >> 16) & 0xff) / 255.0F;
blue = ((shcol >> 8) & 0xff) / 255.0F;
}
mat.diffuseColor = App::Color(red, green, blue);
ADD_PROPERTY_TYPE(ShapeAppearance, (mat), osgroup, App::Prop_None, "Shape appearrance");
ADD_PROPERTY_TYPE(BoundingBox, (false), dogroup, App::Prop_None, "Display object bounding box");
ADD_PROPERTY_TYPE(Selectable,
(true),
sgroup,
App::Prop_None,
"Set if the object is selectable in the 3d view");
bool enableSel = hGrp->GetBool("EnableSelection", true);
Selectable.setValue(enableSel);
pcShapeMaterial = new SoMaterial;
setSoMaterial(mat);
pcShapeMaterial->ref();
pcBoundingBox = new Gui::SoFCBoundingBox;
pcBoundingBox->ref();
pcBoundColor = new SoBaseColor();
pcBoundColor->ref();
sPixmap = "Feature";
}
ViewProviderGeometryObject::~ViewProviderGeometryObject()
{
pcShapeMaterial->unref();
pcBoundingBox->unref();
pcBoundColor->unref();
}
void ViewProviderGeometryObject::onChanged(const App::Property* prop)
{
// Actually, the properties 'ShapeColor' and 'Transparency' are part of the property
// 'ShapeMaterial'. Both redundant properties are kept due to more convenience for the user. But
// we must keep the values consistent of all these properties.
std::string propName = prop->getName();
if (prop == &Selectable) {
bool Sel = Selectable.getValue();
setSelectable(Sel);
}
else if (prop == &Transparency) {
long value = toPercent(ShapeAppearance.getTransparency());
if (value != Transparency.getValue()) {
float trans = fromPercent(Transparency.getValue());
pcShapeMaterial->transparency = trans;
ShapeAppearance.setTransparency(trans);
}
}
else if (prop == &ShapeAppearance) {
if (getObject() && getObject()->testStatus(App::ObjectStatus::TouchOnColorChange)) {
getObject()->touch(true);
}
const App::Material& Mat = ShapeAppearance[0];
long value = toPercent(ShapeAppearance.getTransparency());
if (value != Transparency.getValue()) {
Transparency.setValue(value);
}
setSoMaterial(Mat);
}
else if (prop == &BoundingBox) {
showBoundingBox(BoundingBox.getValue());
}
ViewProviderDragger::onChanged(prop);
}
void ViewProviderGeometryObject::attach(App::DocumentObject* pcObj)
{
ViewProviderDragger::attach(pcObj);
}
void ViewProviderGeometryObject::updateData(const App::Property* prop)
{
if (prop->isDerivedFrom(App::PropertyComplexGeoData::getClassTypeId())) {
Base::BoundBox3d box =
static_cast<const App::PropertyComplexGeoData*>(prop)->getBoundingBox();
pcBoundingBox->minBounds.setValue(box.MinX, box.MinY, box.MinZ);
pcBoundingBox->maxBounds.setValue(box.MaxX, box.MaxY, box.MaxZ);
}
else if (prop->isDerivedFrom(App::PropertyPlacement::getClassTypeId())) {
auto geometry = dynamic_cast<App::GeoFeature*>(getObject());
if (geometry && prop == &geometry->Placement) {
const App::PropertyComplexGeoData* data = geometry->getPropertyOfGeometry();
if (data) {
Base::BoundBox3d box = data->getBoundingBox();
pcBoundingBox->minBounds.setValue(box.MinX, box.MinY, box.MinZ);
pcBoundingBox->maxBounds.setValue(box.MaxX, box.MaxY, box.MaxZ);
}
}
}
else if (std::string(prop->getName()) == "ShapeMaterial") {
// Set the appearance from the material
auto geometry = dynamic_cast<App::GeoFeature*>(getObject());
if (geometry) {
auto material = geometry->getMaterialAppearance();
ShapeAppearance.setValue(material);
}
}
ViewProviderDragger::updateData(prop);
}
SoPickedPointList ViewProviderGeometryObject::getPickedPoints(const SbVec2s& pos,
const View3DInventorViewer& viewer,
bool pickAll) const
{
auto root = new SoSeparator;
root->ref();
root->addChild(viewer.getHeadlight());
root->addChild(viewer.getSoRenderManager()->getCamera());
root->addChild(getRoot());
SoRayPickAction rp(viewer.getSoRenderManager()->getViewportRegion());
rp.setPickAll(pickAll);
rp.setRadius(viewer.getPickRadius());
rp.setPoint(pos);
rp.apply(root);
root->unref();
// returns a copy of the list
return rp.getPickedPointList();
}
SoPickedPoint* ViewProviderGeometryObject::getPickedPoint(const SbVec2s& pos,
const View3DInventorViewer& viewer) const
{
auto root = new SoSeparator;
root->ref();
root->addChild(viewer.getHeadlight());
root->addChild(viewer.getSoRenderManager()->getCamera());
root->addChild(getRoot());
SoRayPickAction rp(viewer.getSoRenderManager()->getViewportRegion());
rp.setPoint(pos);
rp.setRadius(viewer.getPickRadius());
rp.apply(root);
root->unref();
// returns a copy of the point
SoPickedPoint* pick = rp.getPickedPoint();
// return (pick ? pick->copy() : 0); // needs the same instance of CRT under MS Windows
return (pick ? new SoPickedPoint(*pick) : nullptr);
}
unsigned long ViewProviderGeometryObject::getBoundColor() const
{
ParameterGrp::handle hGrp =
App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/View");
unsigned long bbcol =
hGrp->GetUnsigned("BoundingBoxColor", 4294967295UL); // white (255,255,255)
return bbcol;
}
void ViewProviderGeometryObject::setSoMaterial(const App::Material& source)
{
pcShapeMaterial->ambientColor.setValue(source.ambientColor.r,
source.ambientColor.g,
source.ambientColor.b);
pcShapeMaterial->diffuseColor.setValue(source.diffuseColor.r,
source.diffuseColor.g,
source.diffuseColor.b);
pcShapeMaterial->specularColor.setValue(source.specularColor.r,
source.specularColor.g,
source.specularColor.b);
pcShapeMaterial->emissiveColor.setValue(source.emissiveColor.r,
source.emissiveColor.g,
source.emissiveColor.b);
pcShapeMaterial->shininess.setValue(source.shininess);
pcShapeMaterial->transparency.setValue(source.transparency);
}
namespace
{
float getBoundBoxFontSize()
{
ParameterGrp::handle hGrp =
App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/View");
return hGrp->GetFloat("BoundingBoxFontSize", 10.0);
}
} // namespace
void ViewProviderGeometryObject::showBoundingBox(bool show)
{
if (!pcBoundSwitch && show) {
unsigned long bbcol = getBoundColor();
float red {};
float green {};
float blue {};
red = ((bbcol >> 24) & 0xff) / 255.0F;
green = ((bbcol >> 16) & 0xff) / 255.0F;
blue = ((bbcol >> 8) & 0xff) / 255.0F;
pcBoundSwitch = new SoSwitch();
auto pBoundingSep = new SoSeparator();
auto lineStyle = new SoDrawStyle;
lineStyle->lineWidth = 2.0F;
pBoundingSep->addChild(lineStyle);
pcBoundColor->rgb.setValue(red, green, blue);
pBoundingSep->addChild(pcBoundColor);
auto font = new SoFont();
font->size.setValue(getBoundBoxFontSize());
pBoundingSep->addChild(font);
pBoundingSep->addChild(new SoResetTransform());
pBoundingSep->addChild(pcBoundingBox);
pcBoundingBox->coordsOn.setValue(false);
pcBoundingBox->dimensionsOn.setValue(true);
// add to the highlight node
pcBoundSwitch->addChild(pBoundingSep);
pcRoot->addChild(pcBoundSwitch);
}
if (pcBoundSwitch) {
pcBoundSwitch->whichChild = (show ? 0 : -1);
}
}
void ViewProviderGeometryObject::setSelectable(bool selectable)
{
SoSearchAction sa;
sa.setInterest(SoSearchAction::ALL);
sa.setSearchingAll(true);
sa.setType(Gui::SoFCSelection::getClassTypeId());
sa.apply(pcRoot);
SoPathList& pathList = sa.getPaths();
for (int i = 0; i < pathList.getLength(); i++) {
auto selNode = dynamic_cast<SoFCSelection*>(pathList[i]->getTail());
if (selectable) {
if (selNode) {
selNode->selectionMode = SoFCSelection::SEL_ON;
selNode->highlightMode = SoFCSelection::AUTO;
}
}
else {
if (selNode) {
selNode->selectionMode = SoFCSelection::SEL_OFF;
selNode->highlightMode = SoFCSelection::OFF;
selNode->selected = SoFCSelection::NOTSELECTED;
}
}
}
}
PyObject* ViewProviderGeometryObject::getPyObject()
{
if (!pyViewObject) {
pyViewObject = new ViewProviderGeometryObjectPy(this);
}
pyViewObject->IncRef();
return pyViewObject;
}
void ViewProviderGeometryObject::handleChangedPropertyName(Base::XMLReader& reader,
const char* TypeName,
const char* PropName)
{
if (strcmp(PropName, "ShapeColor") == 0
&& strcmp(TypeName, App::PropertyColor::getClassTypeId().getName()) == 0) {
App::PropertyColor prop;
prop.Restore(reader);
ShapeAppearance.setDiffuseColor(prop.getValue());
}
else if (strcmp(PropName, "ShapeMaterial") == 0
&& strcmp(TypeName, App::PropertyMaterial::getClassTypeId().getName()) == 0) {
App::PropertyMaterial prop;
prop.Restore(reader);
ShapeAppearance.setValue(prop.getValue());
}
else {
ViewProviderDragger::handleChangedPropertyName(reader, TypeName, PropName);
}
}
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