SCM: Use artIntensity from ConstellationMgr (#4682)

* connect to constmgrs art intensity

* change function name

Author: xLPMG

plugins/SkyCultureMaker/src/ScmConstellationArtwork.cpp

@@ -22,6 +22,7 @@
  */
 
 #include "ScmConstellationArtwork.hpp"
+#include "ConstellationMgr.hpp"
 #include "StarMgr.hpp"
 #include "StelApp.hpp"
 #include "StelModuleMgr.hpp"
@@ -36,11 +37,20 @@ scm::ScmConstellationArtwork::ScmConstellationArtwork(const std::array<Anchor, 3
 	, artwork(artwork)
 	, hasArt(true)
 {
+	initValues();
 }
 
 scm::ScmConstellationArtwork::ScmConstellationArtwork()
 	: hasArt(false)
 {
+	initValues();
+}
+
+void scm::ScmConstellationArtwork::initValues()
+{
+	ConstellationMgr *constMgr = GETSTELMODULE(ConstellationMgr);
+	artIntensity = constMgr->getArtIntensity();
+	QObject::connect(constMgr, &ConstellationMgr::artIntensityChanged, [this](float v) { artIntensity = v; });
 }
 
 void scm::ScmConstellationArtwork::setupArt()
@@ -279,7 +289,7 @@ bool scm::ScmConstellationArtwork::save(const QString &filepath) const
 void scm::ScmConstellationArtwork::drawOptimized(StelPainter &sPainter, const SphericalRegion &region,
                                                  const Vec3d &obsVelocity) const
 {
-	const float intensity = artOpacity * artIntensityFovScale;
+	const float intensity = artIntensity * artIntensityFovScale;
 	if (artTexture && intensity > 0.0f && region.intersects(boundingCap))
 	{
 		sPainter.setColor(intensity, intensity, intensity);

plugins/SkyCultureMaker/src/ScmConstellationArtwork.hpp

@@ -35,6 +35,13 @@
 
 namespace scm
 {
+/**
+ * @brief Class that represents a constellation artwork.
+ * 
+ * Due to the lambda capture of 'this' in QObject::connect,
+ * the address of a ScmConstellationArtwork instance must
+ * not change during its lifetime!
+ */
 class ScmConstellationArtwork
 {
 public:
@@ -129,6 +136,11 @@ class ScmConstellationArtwork
      */
 	void drawOptimized(StelPainter &sPainter, const SphericalRegion &region, const Vec3d &obsVelocity) const;
 
+	/**
+	 * @brief Initializes the artwork values from the ConstellationMgr.
+	 */
+	void initValues();
+
 	/// Holds the anchors of the artwork.
 	std::array<Anchor, 3> anchors;
 
@@ -147,8 +159,8 @@ class ScmConstellationArtwork
 	/// Holds the intensity scale based on the Field of View.
 	float artIntensityFovScale = 1.0f;
 
-	/// Holds the opacity of the art.
-	float artOpacity = 0.42;
+	/// Holds the intensity of the art.
+	float artIntensity = 0.42;
 
 	/// Indicates if the artwork has an image that can be drawn.
 	bool hasArt = false;