Change how the calculation of the fine tuning is done

modules/skybrowser/include/targetbrowserpair.h

@@ -55,7 +55,7 @@ public:
 
     // Mouse interaction
     void startFinetuningTarget();
-    void fineTuneTarget(const glm::vec2& startMouse, const glm::vec2& translation);
+    void fineTuneTarget(const glm::vec2& translation);
     void synchronizeAim();
 
     // Browser

modules/skybrowser/skybrowsermodule_lua.inl

@@ -693,18 +693,15 @@ namespace {
  * and third is the end position of the drag.
  */
 [[codegen::luawrap]] void finetuneTargetPosition(std::string identifier,
-                                                 glm::vec2 startPosition,
-                                                 glm::vec2 endPosition)
+                                                 glm::dvec2 translation)
 {
     using namespace openspace;
 
     SkyBrowserModule* module = global::moduleEngine->module<SkyBrowserModule>();
     TargetBrowserPair* pair = module->pair(identifier);
     if (pair) {
-        glm::vec2 startScreenSpace = skybrowser::pixelToScreenSpace2d(startPosition);
-        glm::vec2 endScreenSpace = skybrowser::pixelToScreenSpace2d(endPosition);
-        glm::vec2 translation = endScreenSpace - startScreenSpace;
-        pair->fineTuneTarget(startScreenSpace, translation);
+        pair->fineTuneTarget(translation);
+       
     }
 }
 

modules/skybrowser/src/targetbrowserpair.cpp

@@ -85,22 +85,14 @@ void TargetBrowserPair::startFinetuningTarget() {
 // The fine tune of the target is a way to "drag and drop" the target with right click
 // drag on the sky browser window. This is to be able to drag the target around when it
 // has a very small field of view
-void TargetBrowserPair::fineTuneTarget(const glm::vec2& startMouse,
-                                       const glm::vec2& translation)
+void TargetBrowserPair::fineTuneTarget(const glm::vec2& translation)
 {
-    glm::vec2 fineTune = _browser->fineTuneVector(translation);
-    glm::vec2 endMouse = startMouse + fineTune;
-
-    // Translation world
-    glm::dvec3 startWorld = skybrowser::localCameraToGalactic(
-        glm::vec3(startMouse, skybrowser::ScreenSpaceZ)
+    glm::dvec2 startRaDec = skybrowser::cartesianToSpherical(
+        skybrowser::galacticToEquatorial(glm::normalize(_startTargetPosition))
     );
-    glm::dvec3 endWorld = skybrowser::localCameraToGalactic(
-        glm::vec3(endMouse, skybrowser::ScreenSpaceZ)
-    );
-
-    glm::dvec3 translationWorld = endWorld - startWorld;
-    aimTargetGalactic(_startTargetPosition + translationWorld);
+    glm::dvec2 newRaDec = startRaDec + glm::dvec2(translation);
+    glm::dvec3 newCartesian = skybrowser::sphericalToCartesian(newRaDec);
+    aimTargetGalactic(skybrowser::equatorialToGalactic(newCartesian));
 }
 
 void TargetBrowserPair::synchronizeAim() {