qgs3dmapconfigwidget: Only display shadow debug map if shadows are en…

…abled

The shadow debug map can be enabled from the configuration widget even
if no shadow effect is enabled. In that case, the shadow map does not
make it any sense.

This issue is fixed by displaying the shadow debug map only if at
least one shadow effect is enabled.

src/app/3d/qgs3dmapconfigwidget.cpp

@@ -385,7 +385,10 @@ void Qgs3DMapConfigWidget::apply()
   mMap->setViewFrustumVisualizationEnabled( mVisualizeExtentCheckBox->isChecked() );
 
   mMap->setDebugDepthMapSettings( mDebugDepthMapGroupBox->isChecked(), static_cast<Qt::Corner>( mDebugDepthMapCornerComboBox->currentIndex() ), mDebugDepthMapSizeSpinBox->value() );
-  mMap->setDebugShadowMapSettings( mDebugShadowMapGroupBox->isChecked(), static_cast<Qt::Corner>( mDebugShadowMapCornerComboBox->currentIndex() ), mDebugShadowMapSizeSpinBox->value() );
+
+  // Do not display the Debug Shadow Map if shadow effects are not enabled
+  const bool enableDebugShadowMap = mDebugShadowMapGroupBox->isChecked() && ( groupShadowRendering->isChecked() || groupTerrainShading->isChecked() );
+  mMap->setDebugShadowMapSettings( enableDebugShadowMap, static_cast<Qt::Corner>( mDebugShadowMapCornerComboBox->currentIndex() ), mDebugShadowMapSizeSpinBox->value() );
 }
 
 void Qgs3DMapConfigWidget::onTerrainTypeChanged()