57 lines
2.6 KiB
C++
57 lines
2.6 KiB
C++
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#include "ShapeDistanceFinder.h"
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namespace msdfgen {
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template <class ContourCombiner>
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ShapeDistanceFinder<ContourCombiner>::ShapeDistanceFinder(const Shape &shape) : shape(shape), contourCombiner(shape), shapeEdgeCache(shape.edgeCount()) { }
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template <class ContourCombiner>
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typename ShapeDistanceFinder<ContourCombiner>::DistanceType ShapeDistanceFinder<ContourCombiner>::distance(const Point2 &origin) {
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contourCombiner.reset(origin);
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typename ContourCombiner::EdgeSelectorType::EdgeCache *edgeCache = &shapeEdgeCache[0];
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for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour) {
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if (!contour->edges.empty()) {
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typename ContourCombiner::EdgeSelectorType &edgeSelector = contourCombiner.edgeSelector(int(contour-shape.contours.begin()));
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const EdgeSegment *prevEdge = contour->edges.size() >= 2 ? *(contour->edges.end()-2) : *contour->edges.begin();
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const EdgeSegment *curEdge = contour->edges.back();
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for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
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const EdgeSegment *nextEdge = *edge;
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edgeSelector.addEdge(*edgeCache++, prevEdge, curEdge, nextEdge);
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prevEdge = curEdge;
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curEdge = nextEdge;
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}
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}
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}
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return contourCombiner.distance();
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}
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template <class ContourCombiner>
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typename ShapeDistanceFinder<ContourCombiner>::DistanceType ShapeDistanceFinder<ContourCombiner>::oneShotDistance(const Shape &shape, const Point2 &origin) {
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ContourCombiner contourCombiner(shape);
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contourCombiner.reset(origin);
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for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour) {
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if (!contour->edges.empty()) {
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typename ContourCombiner::EdgeSelectorType &edgeSelector = contourCombiner.edgeSelector(int(contour-shape.contours.begin()));
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const EdgeSegment *prevEdge = contour->edges.size() >= 2 ? *(contour->edges.end()-2) : *contour->edges.begin();
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const EdgeSegment *curEdge = contour->edges.back();
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for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
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const EdgeSegment *nextEdge = *edge;
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typename ContourCombiner::EdgeSelectorType::EdgeCache dummy;
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edgeSelector.addEdge(dummy, prevEdge, curEdge, nextEdge);
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prevEdge = curEdge;
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curEdge = nextEdge;
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}
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}
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}
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return contourCombiner.distance();
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}
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}
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