38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
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#pragma once
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#include <vector>
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#include "Vector2.h"
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#include "edge-selectors.h"
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#include "contour-combiners.h"
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namespace msdfgen {
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/// Finds the distance between a point and a Shape. ContourCombiner dictates the distance metric and its data type.
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template <class ContourCombiner>
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class ShapeDistanceFinder {
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public:
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typedef typename ContourCombiner::DistanceType DistanceType;
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// Passed shape object must persist until the distance finder is destroyed!
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explicit ShapeDistanceFinder(const Shape &shape);
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/// Finds the distance from origin. Not thread-safe! Is fastest when subsequent queries are close together.
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DistanceType distance(const Point2 &origin);
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/// Finds the distance between shape and origin. Does not allocate result cache used to optimize performance of multiple queries.
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static DistanceType oneShotDistance(const Shape &shape, const Point2 &origin);
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private:
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const Shape &shape;
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ContourCombiner contourCombiner;
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std::vector<typename ContourCombiner::EdgeSelectorType::EdgeCache> shapeEdgeCache;
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};
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typedef ShapeDistanceFinder<SimpleContourCombiner<TrueDistanceSelector> > SimpleTrueShapeDistanceFinder;
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}
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#include "ShapeDistanceFinder.hpp"
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