Treat the only loaded model as selected

Author: tomas-soltys

src/fea/src/main_window.cpp

@@ -994,7 +994,7 @@ void MainWindow::onModelAdded(uint position)
     R_LOG_TRACE;
     this->modelSubWindows->onModelAdded(position);
     this->modelManagerTree->onModelAdded(position);
-    if (!this->session->isModelSelected(position))
+    if (this->session->getModel(position).isSelected(false))
     {
         this->session->setModelSelected(position,true);
     }

src/fea/src/session.cpp

@@ -124,6 +124,11 @@ void Session::removeModel(uint position)
         this->unlock();
     }
     emit this->modelRemoved(position);
+    if (this->getNModels() == 1)
+    {
+        // Remaining model is now considered selected.
+        emit this->modelSelectionChanged(0);
+    }
     R_LOG_TRACE_OUT;
 }
 
@@ -248,7 +253,7 @@ QList<uint> Session::getSelectedModelIDs() const
     for (uint i=0;i<this->getNModels();i++)
     {
         // Check if model is partialy selected (NOT completely unselected)
-        if (!this->getModel(i).isSelected(false))
+        if (this->isModelSelected(i))
         {
             selectedModelIDs.push_back(i);
         }
@@ -276,9 +281,14 @@ QList<uint> Session::getVisibleModelIDs() const
     return visibleModelIDs;
 }
 
-bool Session::isModelSelected(uint modelID)
+bool Session::isModelSelected(uint modelID) const
 {
 //    R_LOG_TRACE_IN;
+    // Only loaded model is always considered selected.
+    if (this->getNModels() == 1 && modelID == 0)
+    {
+        return true;
+    }
     return (!this->getModel(modelID).isSelected(false));
 }
 

src/fea/src/session.h

@@ -99,7 +99,8 @@ class Session : public QObject
         QList<uint> getVisibleModelIDs() const;
 
         //! Return true if given model ID is selected.
-        bool isModelSelected(uint modelID);
+        //! If only one model is loaded it is always considered selected.
+        bool isModelSelected(uint modelID) const;
 
         //! Return list of all entity IDs.
         QList<SessionEntityID> getAllEntityIDs() const;

src/fea/src/shaders/main.frag

@@ -15,6 +15,11 @@ struct Light { vec3 position; vec4 ambient; vec4 diffuse; };
 
 // Fraction by which a highlighted (selected) entity is moved towards white.
 const float highlightAmount = 0.2;
+// Glow added to a highlighted entity, strongest where its surface turns away from the viewer.
+const vec3  glowColor    = vec3(0.4, 0.75, 1.0);
+const float glowStrength = 0.8;
+// Glow of elements without a surface normal (lines, points).
+const float glowFlat     = 0.25;
 
 uniform int   uNumLights;
 uniform Light uLights[8];
@@ -44,6 +49,13 @@ void main()
     if (uHighlight)
     {
         color = mix(color, vec3(1.0), highlightAmount);
+        // Projection is orthographic, the viewer looks along the eye space z axis.
+        float rim = glowFlat;
+        if (length(vNormal) > 1.0e-6)
+        {
+            rim = pow(1.0 - abs(normalize(vNormal).z), 2.0);
+        }
+        color = min(color + glowColor * glowStrength * rim, vec3(1.0));
     }
     gl_FragColor = vec4(color, baseColor.a);
 }

src/fea/src/shaders/rhi/main.frag

@@ -23,6 +23,11 @@ layout(std140, binding = 0) uniform Ubuf {
 
 // Fraction by which a highlighted (selected) entity is moved towards white.
 const float highlightAmount = 0.2;
+// Glow added to a highlighted entity, strongest where its surface turns away from the viewer.
+const vec3  glowColor    = vec3(0.4, 0.75, 1.0);
+const float glowStrength = 0.8;
+// Glow of elements without a surface normal (lines, points).
+const float glowFlat     = 0.25;
 
 // Colour map — an Nx1 strip standing in for the 1D texture of the OpenGL backend.
 layout(binding = 1) uniform sampler2D uColorMap;
@@ -68,6 +73,14 @@ void main()
     if (ubuf.params2.z > 0.5)
     {
         color = mix(color, vec3(1.0), highlightAmount);
+        // Projection is orthographic, the viewer looks along the eye space z axis.
+        // Expanded point quads carry the quad corner in the normal, not a surface normal.
+        float rim = glowFlat;
+        if (ubuf.params3.x < 0.5 && length(vNormal) > 1.0e-6)
+        {
+            rim = pow(1.0 - abs(normalize(vNormal).z), 2.0);
+        }
+        color = min(color + glowColor * glowStrength * rim, vec3(1.0));
     }
 
     fragColor = vec4(color, baseColor.a);