performance enhancements

memory enhancements
prevent starting sensors more than once
fix for wifi lag issues
map scaling for huge buildings

ui/map/3D/MapView3D.cpp

@@ -108,14 +108,26 @@ void MapView3D::initializeGL() {
 	glEnable(GL_DEPTH_TEST);
 	glEnable(GL_CULL_FACE);
 
-	// start background update timer
-	timer.start(Settings::MapView::msPerFrame.ms(), this);
-
 	// OpenGL is now initialized
 	isGLInitialized = true;
 
 }
 
+void MapView3D::setVisible(bool visible) {
+
+	// inform parent
+	QOpenGLWidget::setVisible(visible);
+
+	if (!visible) {
+		// stop background update timer
+		timer.stop();
+	} else {
+		// start background update timer
+		timer.start(Settings::MapView3D::msPerFrame.ms(), this);
+	}
+
+}
+
 void MapView3D::paintGL() {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 	draw();

ui/map/3D/MapView3D.h

@@ -140,6 +140,8 @@ public:
 
 	void toggleRenderMode();
 
+	void setVisible(bool visible) override;
+
 public slots:
 
 	void mousePressEvent(QMouseEvent*);

ui/map/3D/elements/ColorPoints.h

@@ -10,6 +10,7 @@
 //#include "../gl/GLTriangles.h"
 #include "../Renderable.h"
 
+#include "../../../../Settings.h"
 #include "../../../../nav/Node.h"
 
 class ColorPoints : public Renderable {
@@ -31,6 +32,9 @@ public:
 
 		points.clear();
 
+		// do not display?
+		if (grid->getNumNodes() > Settings::MapView3D::maxColorPoints) {return;}
+
 		float min = +INFINITY;
 		float max = -INFINITY;
 
@@ -62,6 +66,9 @@ public:
 
 		points.clear();
 
+		// do not display?
+		if (particles.size() > Settings::MapView3D::maxColorPoints) {return;}
+
 		// group particles by grid-point
 		std::unordered_map<GridPoint, float> weights;
 		for (const K::Particle<T>& p : particles) {