Make maximum zoom level 400%. Store zoom in settings logarithmically instead of linearly.

helper.py

@@ -117,7 +117,7 @@ Plugin *pluginInstance;
 void init(Plugin *p) {
 	pluginInstance = p;
 
-	// Add modules here, e.g.
+	// Add modules here
 	// p->addModel(modelMyModule);
 
 	// Any other plugin initialization may go here.
@@ -397,6 +397,7 @@ struct {identifier} : Module {{"""
 
 	source += f"""
 
+
 struct {identifier}Widget : ModuleWidget {{
 	{identifier}Widget({identifier} *module) {{
 		setModule(module);

src/app/MenuBar.cpp

@@ -176,16 +176,16 @@ struct EditButton : MenuButton {
 
 struct ZoomQuantity : Quantity {
 	void setValue(float value) override {
-		settings::zoom = math::clamp(value, getMinValue(), getMaxValue());
+		settings::zoom = value;
 	}
 	float getValue() override {
 		return settings::zoom;
 	}
-	float getMinValue() override {return 0.25;}
+	float getMinValue() override {return -2.0;}
 	float getMaxValue() override {return 2.0;}
-	float getDefaultValue() override {return 1.0;}
-	float getDisplayValue() override {return std::round(getValue() * 100);}
-	void setDisplayValue(float displayValue) override {setValue(displayValue / 100);}
+	float getDefaultValue() override {return 0.0;}
+	float getDisplayValue() override {return std::round(std::pow(2.f, getValue()) * 100);}
+	void setDisplayValue(float displayValue) override {setValue(std::log2(displayValue / 100));}
 	std::string getLabel() override {return "Zoom";}
 	std::string getUnit() override {return "%";}
 };

src/app/RackScrollWidget.cpp

@@ -22,9 +22,9 @@ RackScrollWidget::RackScrollWidget() {
 
 void RackScrollWidget::step() {
 	// Clamp zoom
-	settings::zoom = math::clamp(settings::zoom, 0.25f, 2.f);
-	// Round zoom to nearest percent
-	float zoom = std::round(settings::zoom / 0.01) * 0.01;
+	settings::zoom = math::clamp(settings::zoom, -2.f, 2.f);
+	// Compute zoom from exponential zoom
+	float zoom = std::pow(2.f, settings::zoom);
 	if (zoom != zoomWidget->zoom) {
 		// Set offset based on zoomPos
 		offset = offset.plus(zoomPos).div(zoomWidget->zoom).mult(zoom).minus(zoomPos);
@@ -123,7 +123,7 @@ void RackScrollWidget::onHoverScroll(const event::HoverScroll &e) {
 		float zoomDelta = e.scrollDelta.y / 50 / 4;
 		if (settings::invertZoom)
 			zoomDelta *= -1;
-		settings::zoom *= std::pow(2, zoomDelta);
+		settings::zoom += zoomDelta;
 		zoomPos = e.pos;
 		e.consume(this);
 		return;

src/app/Scene.cpp

@@ -122,21 +122,21 @@ void Scene::onHoverKey(const event::HoverKey &e) {
 			} break;
 			case GLFW_KEY_MINUS: {
 				if ((e.mods & RACK_MOD_MASK) == RACK_MOD_CTRL) {
-					float z = std::log2(settings::zoom);
-					z *= 2;
-					z = std::ceil(z - 0.01) - 1;
-					z /= 2;
-					settings::zoom = std::pow(2, z);
+					float zoom = settings::zoom;
+					zoom *= 2;
+					zoom = std::ceil(zoom - 0.01) - 1;
+					zoom /= 2;
+					settings::zoom = zoom;
 					e.consume(this);
 				}
 			} break;
 			case GLFW_KEY_EQUAL: {
 				if ((e.mods & RACK_MOD_MASK) == RACK_MOD_CTRL) {
-					float z = std::log2(settings::zoom);
-					z *= 2;
-					z = std::floor(z + 0.01) + 1;
-					z /= 2;
-					settings::zoom = std::pow(2, z);
+					float zoom = settings::zoom;
+					zoom *= 2;
+					zoom = std::floor(zoom + 0.01) + 1;
+					zoom /= 2;
+					settings::zoom = zoom;
 					e.consume(this);
 				}
 			} break;