added option for normalization

Fragment.glsl

@@ -3,6 +3,7 @@ out vec4 pixColor;
 
 uniform int maxIterationsCount;
 uniform float hueAdd;
+uniform bool normalize;
 
 in vec2 complexPos;
 
@@ -53,9 +54,11 @@ float mandelbrot(in vec2 c){
     }
     if (steps == maxIterationsCount)
         return 0.;
-    float log_zn = log(z.x * z.x + z.y * z.y) / 2;
+    if (normalize){
-    float nu = log(log_zn / log(2.)) / log(2.);
+        float log_zn = log(z.x * z.x + z.y * z.y) / 2;
-    steps += 1 - nu;
+        float nu = log(log_zn / log(2.)) / log(2.);
+        steps += 1 - nu;
+    }
     float t = steps / maxIterationsCount;
     return sqrt(t);
 }

headers/Mandelbrot.h

@@ -17,12 +17,14 @@ public:
 	bool initShader();
 public slots:
 	void toggleAnimation();
+	void toggleNormalize();
 private:
 	int maxIterations = 0;
 	float hueAdd = 0;
 	QVector2D origin {-2, -1};
 	QVector2D size {2, 2};
 	float zoomModifier = 1.05;
+	bool normalize = true;
 
 	bool animating = true;
 

src/MainWindow.cpp

@@ -53,6 +53,12 @@ void MainWindow::buildUI() {
 			&outputWidget.getMandelbrot(),
 			&Mandelbrot::toggleAnimation);
 
+	auto normButton = new QPushButton("Toggle normalization");
+	connect(normButton,
+			&QPushButton::clicked,
+			&outputWidget.getMandelbrot(),
+			&Mandelbrot::toggleNormalize);
+
 	auto controls = new QGridLayout;
 	controls->addWidget(maxIterationsCaption, 1, 1);
 	controls->addWidget(maxIterationsLabel, 1, 2);
@@ -60,6 +66,7 @@ void MainWindow::buildUI() {
 	controls->addWidget(saveInfo, 2, 1, 1, 2);
 	controls->addWidget(saveButton, 2, 3, 1, 1);
 	controls->addWidget(animButton, 3, 1, 1, 3);
+	controls->addWidget(normButton, 4, 1, 1, 3);
 
 	auto lyt = new QVBoxLayout(this);
 	lyt->addWidget(&outputWidget);

src/Mandelbrot.cpp

@@ -41,6 +41,7 @@ void Mandelbrot::setShaderValues() {
 	shader.setUniformValue("size", size);
 	shader.setUniformValue("maxIterationsCount", maxIterations);
 	shader.setUniformValue("hueAdd", hueAdd);
+	shader.setUniformValue("normalize", normalize);
 }
 
 void Mandelbrot::zoomRelative(int direction, QVector2D posRelative) {
@@ -65,6 +66,10 @@ void Mandelbrot::resizeRelative(QVector2D relative) {
 	size *= relative;
 }
 
+void Mandelbrot::toggleNormalize() {
+	normalize = !normalize;
+}
+