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