Gui: [skip ci] add options to set one-pass and backface-pass rendering

Author: wwmayer

src/Gui/DlgSettings3DView.ui

@@ -214,6 +214,45 @@ but slower response to any scene changes.</string>
          </widget>
         </item>
         <item row="2" column="0">
+         <widget class="QLabel" name="transparentRenderLabel">
+          <property name="toolTip">
+           <string/>
+          </property>
+          <property name="text">
+           <string>Transparent objects:</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="4">
+         <widget class="Gui::PrefComboBox" name="comboTransparentRender">
+          <property name="minimumSize">
+           <size>
+            <width>120</width>
+            <height>0</height>
+           </size>
+          </property>
+          <property name="toolTip">
+           <string>Render types of transparent objects</string>
+          </property>
+          <property name="prefEntry" stdset="0">
+           <cstring>TransparentObjectRenderType</cstring>
+          </property>
+          <property name="prefPath" stdset="0">
+           <cstring>View</cstring>
+          </property>
+          <item>
+           <property name="text">
+            <string>One pass</string>
+           </property>
+          </item>
+          <item>
+           <property name="text">
+            <string>Backface pass</string>
+           </property>
+          </item>
+         </widget>
+        </item>
+        <item row="3" column="0">
          <widget class="QLabel" name="markerSizeLabel">
           <property name="toolTip">
            <string/>
@@ -223,7 +262,7 @@ but slower response to any scene changes.</string>
           </property>
          </widget>
         </item>
-        <item row="2" column="4">
+        <item row="3" column="4">
          <widget class="QComboBox" name="boxMarkerSize">
           <property name="minimumSize">
            <size>
@@ -236,14 +275,14 @@ but slower response to any scene changes.</string>
           </property>
          </widget>
         </item>
-        <item row="3" column="0">
+        <item row="4" column="0">
          <widget class="QLabel" name="textLabel1">
           <property name="text">
            <string>Eye to eye distance for stereo modes</string>
           </property>
          </widget>
         </item>
-        <item row="3" column="4">
+        <item row="4" column="4">
          <widget class="Gui::PrefDoubleSpinBox" name="FloatSpinBox_EyeDistance">
           <property name="minimumSize">
            <size>
@@ -279,7 +318,7 @@ bounding box size of the 3D object that is currently displayed. </string>
           </property>
          </widget>
         </item>
-        <item row="4" column="0">
+        <item row="5" column="0">
          <widget class="Gui::PrefCheckBox" name="checkBoxBacklight">
           <property name="toolTip">
            <string>Backlight is enabled with the defined color</string>
@@ -295,7 +334,7 @@ bounding box size of the 3D object that is currently displayed. </string>
           </property>
          </widget>
         </item>
-        <item row="4" column="1">
+        <item row="5" column="1">
          <widget class="Gui::PrefColorButton" name="backlightColor">
           <property name="enabled">
            <bool>false</bool>
@@ -318,7 +357,7 @@ bounding box size of the 3D object that is currently displayed. </string>
           </property>
          </widget>
         </item>
-        <item row="4" column="2">
+        <item row="5" column="2">
          <spacer name="horizontalSpacer">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
@@ -331,7 +370,7 @@ bounding box size of the 3D object that is currently displayed. </string>
           </property>
          </spacer>
         </item>
-        <item row="4" column="3">
+        <item row="5" column="3">
          <widget class="QLabel" name="backlightLabel">
           <property name="enabled">
            <bool>false</bool>
@@ -347,7 +386,7 @@ bounding box size of the 3D object that is currently displayed. </string>
           </property>
          </widget>
         </item>
-        <item row="4" column="4">
+        <item row="5" column="4">
          <widget class="Gui::PrefSlider" name="sliderIntensity">
           <property name="enabled">
            <bool>false</bool>

src/Gui/DlgSettings3DViewImp.cpp

@@ -83,6 +83,8 @@ void DlgSettings3DViewImp::saveSettings()
     index = ui->renderCache->currentIndex();
     hGrp->SetInt("RenderCache", index);
 
+    ui->comboTransparentRender->onSave();
+
     QVariant const &vBoxMarkerSize = ui->boxMarkerSize->itemData(ui->boxMarkerSize->currentIndex());
     hGrp->SetInt("MarkerSize", vBoxMarkerSize.toInt());
 
@@ -124,6 +126,8 @@ void DlgSettings3DViewImp::loadSettings()
     index = hGrp->GetInt("RenderCache", 0);
     ui->renderCache->setCurrentIndex(index);
 
+    ui->comboTransparentRender->onRestore();
+
     int const current = hGrp->GetInt("MarkerSize", 9L);
     ui->boxMarkerSize->addItem(tr("5px"), QVariant(5));
     ui->boxMarkerSize->addItem(tr("7px"), QVariant(7));

src/Gui/View3DInventor.cpp

@@ -189,6 +189,7 @@ View3DInventor::View3DInventor(Gui::Document* pcDocument, QWidget* parent,
     OnChange(*hGrp,"Dimensions3dVisible");
     OnChange(*hGrp,"DimensionsDeltaVisible");
     OnChange(*hGrp,"PickRadius");
+    OnChange(*hGrp,"TransparentObjectRenderType");
 
     stopSpinTimer = new QTimer(this);
     connect(stopSpinTimer, SIGNAL(timeout()), this, SLOT(stopAnimating()));
@@ -414,6 +415,17 @@ void View3DInventor::OnChange(ParameterGrp::SubjectType &rCaller,ParameterGrp::M
     else if (strcmp(Reason, "PickRadius") == 0) {
         _viewer->setPickRadius(rGrp.GetFloat("PickRadius", 5.0f));
     }
+    else if (strcmp(Reason, "TransparentObjectRenderType") == 0) {
+        long renderType = rGrp.GetInt("TransparentObjectRenderType", 0);
+        if (renderType == 0) {
+            _viewer->getSoRenderManager()->getGLRenderAction()
+                   ->setTransparentDelayedObjectRenderType(SoGLRenderAction::ONE_PASS);
+        }
+        else if (renderType == 1) {
+            _viewer->getSoRenderManager()->getGLRenderAction()
+                   ->setTransparentDelayedObjectRenderType(SoGLRenderAction::NONSOLID_SEPARATE_BACKFACE_PASS);
+        }
+    }
     else {
         unsigned long col1 = rGrp.GetUnsigned("BackgroundColor",3940932863UL);
         unsigned long col2 = rGrp.GetUnsigned("BackgroundColor2",859006463UL); // default color (dark blue)