fixed view ratio

headers/Mandelbrot.h

@@ -15,17 +15,20 @@ public:
 	void zoomRelative(int, QVector2D);
 	void resizeRelative(QVector2D);
 	bool initShader();
+	void initView(QSize);
 public slots:
 	void toggleAnimation();
 	void toggleNormalize();
 private:
+	const QVector2D startCenter {-0.66, 0};
+	const float startMaxSize = 3;
+
 	int maxIterations = 0;
 	float hueAdd = 0;
-	QVector2D origin {-2, -1};
+	QVector2D origin;
-	QVector2D size {2, 2};
+	QVector2D size;
 	float zoomModifier = 1.05;
 	bool normalize = true;
-
 	bool animating = true;
 
 	GLuint vao;

src/Mandelbrot.cpp

@@ -70,6 +70,19 @@ void Mandelbrot::toggleNormalize() {
 	normalize = !normalize;
 }
 
+void Mandelbrot::initView(QSize startSize) {
+	int viewW = startSize.width();
+	int viewH = startSize.height();
+	float ratio = float(viewW) / float(viewH);
+
+	if (ratio > 1){
+		size = {startMaxSize, startMaxSize / ratio};
+	} else {
+		size = {startMaxSize * ratio, startMaxSize};
+	}
+	origin = startCenter - size / 2;
+}
+
 
 
 

src/OutputWidget.cpp

@@ -82,6 +82,7 @@ void OutputWidget::resizeGL(int w, int h) {
 	QSize newSize = QSize(w, h);
 	if (oldSize == QSize(0, 0)){
 		oldSize = newSize;
+		getMandelbrot().initView(newSize);
 		return;
 	}
 	QSize diff = oldSize - newSize;