Axis fixes

CHANGELOG.md

@@ -10,6 +10,10 @@
   - Axis: line, title, labels, guides, interlacing, ticks
   - Legend: title, dimension markers, measure extrema labels
   - Marker: line with connections
+- Fix negative ranges on x, y, color (measure) and lightness.
+- Fix axis step parameter if not match with the range sign (neg/pos).
+- Fix axis interpolation. From now the axis and axis labels are following the markers.
+- Fix measure axis labels when the range started after the 2000th step value from origo. 
 
 ### Added
 

src/base/anim/interpolated.h

@@ -204,7 +204,7 @@ template <typename Type> class Interpolated
 		return false;
 	}
 
-	template <class T, class U>
+	template <class T = double, class U>
 	[[nodiscard]] T factor(const U &value) const
 	{
 		double res{};

src/base/math/range.h

@@ -74,11 +74,6 @@ template <std::floating_point T> struct Range
 		return is_zero(s) ? 0.5 : (value - min) / s;
 	}
 
-	[[nodiscard]] Range<T> rescale(const Range<T> &range) const
-	{
-		return Range<T>(rescale(range.min), rescale(range.max));
-	}
-
 	[[nodiscard]] T scale(const T &value) const
 	{
 		return value * size() + min;

src/chart/generator/axis.cpp

@@ -1,6 +1,8 @@
 #include "axis.h"
 
 #include <algorithm>
+#include <cmath>
+#include <limits>
 #include <map>
 #include <optional>
 #include <string>
@@ -42,7 +44,13 @@ MeasureAxis::MeasureAxis(Math::Range<double> interval,
     unit(std::string{unit}),
     origMeasureName(std::string{measName}),
     step(step ? *step : Math::Renard::R5().ceil(range.size() / 5.0))
-{}
+{
+	if (Math::Floating::is_zero(range.size()))
+		this->step->value = 0;
+	else if (std::signbit(this->step->value)
+	         != std::signbit(range.size()))
+		this->step->value *= -1;
+}
 
 bool MeasureAxis::operator==(const MeasureAxis &other) const
 {
@@ -68,8 +76,66 @@ MeasureAxis interpolate(const MeasureAxis &op0,
 	    interpolate(op0.origMeasureName, op1.origMeasureName, factor);
 
 	if (op0.enabled.get() && op1.enabled.get()) {
-		res.range = Math::interpolate(op0.range, op1.range, factor);
-		res.step = interpolate(op0.step, op1.step, factor);
+		constexpr auto MAX = std::numeric_limits<double>::max() / 2;
+		using Math::Floating::is_zero;
+
+		const auto s0 = op0.range.size();
+		const auto s1 = op1.range.size();
+
+		if (auto s0Zero = is_zero(s0); s0Zero || is_zero(s1)) {
+			res.range = Math::Range<double>::Raw(
+			    Math::interpolate(op0.range.getMin(),
+			        op1.range.getMin(),
+			        factor),
+			    Math::interpolate(op0.range.getMax(),
+			        op1.range.getMax(),
+			        factor));
+			res.step = s0Zero ? op1.step : op0.step;
+		}
+		else {
+			auto s0Inv = 1 / s0;
+			auto s1Inv = 1 / s1;
+
+			const auto interp =
+			    Math::interpolate(s0Inv, s1Inv, factor);
+
+			const auto s = is_zero(interp) ? MAX : 1 / interp;
+
+			res.range = Math::Range<double>::Raw(
+			    Math::interpolate(op0.range.getMin() * s0Inv,
+			        op1.range.getMin() * s1Inv,
+			        factor)
+			        * s,
+			    Math::interpolate(op0.range.getMax() * s0Inv,
+			        op1.range.getMax() * s1Inv,
+			        factor)
+			        * s);
+
+			auto step = Math::interpolate(op0.step.get() * s0Inv,
+			                op1.step.get() * s1Inv,
+			                factor)
+			          * s;
+
+			if (auto op0sign = std::signbit(op0.step.get());
+			    op0sign == std::signbit(op1.step.get()))
+				res.step = interpolate(op0.step,
+				    op1.step,
+				    Math::Range<double>::Raw(op0.step.get(),
+				        op1.step.get())
+				        .rescale(step));
+			else if (auto max = std::copysign(MAX, step);
+			         op0sign == std::signbit(step))
+				res.step = interpolate(op0.step,
+				    Anim::Interpolated{max},
+				    Math::Range<double>::Raw(op0.step.get(), max)
+				        .rescale(step));
+			else
+				res.step = interpolate(op1.step,
+				    Anim::Interpolated{max},
+				    Math::Range<double>::Raw(op1.step.get(), max)
+				        .rescale(step));
+		}
+
 		res.unit = interpolate(op0.unit, op1.unit, factor);
 	}
 	else if (op0.enabled.get()) {

src/chart/generator/plotbuilder.cpp

@@ -355,23 +355,26 @@ void PlotBuilder::normalizeXY()
 	}
 
 	plot->getOptions()->setAutoRange(
-	    !std::signbit(boundRect.positive().hSize().getMin()),
-	    !std::signbit(boundRect.positive().vSize().getMin()));
+	    !std::signbit(boundRect.hSize().getMin()),
+	    !std::signbit(boundRect.vSize().getMin()));
 
 	boundRect.setHSize(xrange.getRange(boundRect.hSize()));
 	boundRect.setVSize(yrange.getRange(boundRect.vSize()));
 
 	for (auto &marker : plot->markers) {
-		if (!boundRect.intersects(marker.toRectangle().positive()))
+		if (!boundRect.positive().intersects(
+		        marker.toRectangle().positive()))
 			marker.enabled = false;
 
 		auto rect = marker.toRectangle();
 		auto newRect = boundRect.normalize(rect);
 		marker.fromRectangle(newRect);
 	}
 
-	getMeasTrackRange(ChannelId::x) = boundRect.hSize();
-	getMeasTrackRange(ChannelId::y) = boundRect.vSize();
+	getMeasTrackRange(ChannelId::x) =
+	    Math::Range<double>::Raw(boundRect.left(), boundRect.right());
+	getMeasTrackRange(ChannelId::y) =
+	    Math::Range<double>::Raw(boundRect.bottom(), boundRect.top());
 }
 
 void PlotBuilder::calcMeasureAxises(const Data::DataTable &dataTable)
@@ -478,7 +481,10 @@ void PlotBuilder::addAlignment(const Buckets &subBuckets) const
 
 	if (std::signbit(
 	        plot->axises.at(plot->getOptions()->subAxisType())
-	            .measure.range.getMin()))
+	            .measure.range.getMin())
+	    || std::signbit(
+	        plot->axises.at(plot->getOptions()->subAxisType())
+	            .measure.range.getMax()))
 		return;
 
 	if (plot->getOptions()->align == Base::Align::Type::none) return;

src/chart/options/channelrange.cpp

@@ -25,8 +25,9 @@ ChannelExtrema::operator std::string() const
 Math::Range<double> ChannelRange::getRange(
     const Math::Range<double> &original) const
 {
-	return {getExtrema(min, original.getMin(), original),
-	    getExtrema(max, original.getMax(), original)};
+	return Math::Range<double>::Raw(
+	    getExtrema(min, original.getMin(), original),
+	    getExtrema(max, original.getMax(), original));
 }
 
 double ChannelRange::getExtrema(const OptionalChannelExtrema &extrema,

src/chart/rendering/drawaxes.cpp

@@ -227,7 +227,7 @@ void DrawAxes::drawTitle(Gen::ChannelId axisIndex) const
 		            ? titleStyle.orientation->get_or_first(index)
 		                      .value
 		                  == Styles::AxisTitle::Orientation::vertical
-		            : titleStyle.orientation->factor<double>(
+		            : titleStyle.orientation->factor(
 		                Styles::AxisTitle::Orientation::vertical));
 
 		auto orientedSize =
@@ -336,7 +336,7 @@ void DrawAxes::drawDimensionLabel(bool horizontal,
 		        labelStyle.position->interpolates()
 		            ? labelStyle.side->get_or_first(index).value
 		                  == Styles::AxisLabel::Side::negative
-		            : labelStyle.side->factor<double>(
+		            : labelStyle.side->factor(
 		                Styles::AxisLabel::Side::negative);
 
 		    auto sign = 1 - 2 * under;

src/chart/rendering/drawguides.cpp

@@ -34,8 +34,7 @@ void DrawGuides::draw(bool horizontal)
 	const auto &axis = axises.at(axisId).dimension;
 
 	if (axis.enabled && *guideStyle.lineWidth > 0
-	    && (static_cast<double>(plot->guides.at(axisId).axisGuides)
-	        > 0)) {
+	    && plot->guides.at(axisId).axisGuides != false) {
 		canvas.setLineWidth(*guideStyle.lineWidth);
 
 		for (auto it = axis.begin(); it != axis.end(); ++it) {

src/chart/rendering/drawinterlacing.cpp

@@ -10,6 +10,7 @@
 #include "base/geom/rect.h"
 #include "base/gfx/colortransform.h"
 #include "base/gfx/font.h"
+#include "base/math/floating.h"
 #include "base/math/range.h"
 #include "base/math/renard.h"
 #include "base/text/smartstring.h"
@@ -79,7 +80,7 @@ void DrawInterlacing::draw(bool horizontal, bool text) const
 	}
 	else {
 		auto highWeight =
-		    Math::Range(stepLow, stepHigh).rescale(step);
+		    Math::Range<double>::Raw(stepLow, stepHigh).rescale(step);
 
 		auto lowWeight = (1.0 - highWeight) * enabled;
 		highWeight *= enabled;
@@ -119,9 +120,8 @@ void DrawInterlacing::draw(
 
 	const auto origo = plot->axises.origo();
 
-	if (static_cast<double>(enabled.interlacings || enabled.axisSticks
-	                        || enabled.labels)
-	    > 0) {
+	if ((enabled.interlacings || enabled.axisSticks || enabled.labels)
+	    != false) {
 		auto interlaceIntensity = Math::FuzzyBool::And<double>(weight,
 		    enabled.interlacings);
 		auto interlaceColor =
@@ -133,15 +133,19 @@ void DrawInterlacing::draw(
 		auto textAlpha =
 		    Math::FuzzyBool::And<double>(weight, enabled.labels);
 
-		if (rangeSize <= 0) return;
+		if (std::signbit(rangeSize) != std::signbit(stepSize)
+		    || Math::Floating::is_zero(rangeSize))
+			return;
 
 		auto stripWidth = stepSize / rangeSize;
 
 		auto axisBottom = axis.origo() + stripWidth;
 
-		auto iMin = axisBottom > 0 ? static_cast<int>(
-		                std::floor(-axis.origo() / (2 * stripWidth)))
-		                           : 0;
+		auto iMin =
+		    axisBottom > 0 ? static_cast<int>(
+		        std::floor(-axis.origo() / (2 * stripWidth)))
+		                   : static_cast<int>(
+		                       (axis.range.getMin() - stepSize) / 2);
 
 		if (stripWidth <= 0) return;
 		auto interlaceCount = 0U;
@@ -270,7 +274,7 @@ void DrawInterlacing::drawDataLabel(
 		auto under = labelStyle.position->interpolates()
 		               ? labelStyle.side->get_or_first(index).value
 		                     == Styles::AxisLabel::Side::negative
-		               : labelStyle.side->factor<double>(
+		               : labelStyle.side->factor(
 		                   Styles::AxisLabel::Side::negative);
 
 		auto &&posDir =

src/chart/rendering/drawlegend.cpp

@@ -244,7 +244,7 @@ void DrawLegend::drawMarker(Info &info,
 	info.canvas.setLineColor(color);
 	info.canvas.setLineWidth(0);
 
-	auto radius = rootStyle.legend.marker.type->factor<double>(
+	auto radius = rootStyle.legend.marker.type->factor(
 	                  Styles::Legend::Marker::Type::circle)
 	            * rect.size.minSize() / 2.0;
 

src/chart/rendering/markerrenderer.cpp

@@ -75,7 +75,7 @@ void MarkerRenderer::drawLines(Gfx::ICanvas &canvas,
 			auto center = Geom::Point{blended.center};
 			center.x = Math::interpolate(center.x,
 			    1.0,
-			    getOptions().coordSystem.factor<double>(
+			    getOptions().coordSystem.factor(
 			        Gen::CoordSystem::polar));
 			canvas.setLineColor(yLineColor);
 			auto axisPoint = center.yComp() + origo.xComp();
@@ -142,9 +142,8 @@ void MarkerRenderer::drawMarkers(Gfx::ICanvas &canvas,
 				const auto &blended0 =
 				    index == ::Anim::second ? *other : blended;
 
-				auto lineFactor =
-				    getOptions().geometry.factor<double>(
-				        Gen::ShapeType::line);
+				auto lineFactor = getOptions().geometry.factor(
+				    Gen::ShapeType::line);
 
 				draw(canvas,
 				    painter,
@@ -335,7 +334,7 @@ void MarkerRenderer::drawLabel(Gfx::ICanvas &canvas,
 		    return abstractMarker.getLabelPos(position, coordSys);
 	    });
 
-	auto centered = labelStyle.position->factor<double>(
+	auto centered = labelStyle.position->factor(
 	    Styles::MarkerLabel::Position::center);
 
 	OrientedLabel{{ctx()}}.draw(canvas,

src/chart/rendering/markers/rectanglemarker.cpp

@@ -20,9 +20,7 @@ RectangleMarker::RectangleMarker(const Gen::Marker &marker,
     const Styles::Chart &style) :
     SingleDrawMarker(marker, options, Gen::ShapeType::rectangle)
 {
-	linear =
-	    options.coordSystem.factor<double>(Gen::CoordSystem::polar)
-	    == 0;
+	linear = options.coordSystem.factor(Gen::CoordSystem::polar) == 0;
 	border = Math::FuzzyBool(true);
 
 	auto spacing = Geom::Size{

src/chart/rendering/painter/coordinatesystem.cpp

@@ -18,7 +18,7 @@ namespace Vizzu::Draw
 PolarDescartesTransform::PolarDescartesTransform(
     const Anim::Interpolated<Gen::CoordSystem> &coordSystem) :
     zoomOut{true},
-    polar(coordSystem.factor<double>(Gen::CoordSystem::polar))
+    polar(coordSystem.factor(Gen::CoordSystem::polar))
 {}
 
 Geom::Point PolarDescartesTransform::convert(