mirror of https://github.com/Chlumsky/msdfgen.git
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
|
|
#pragma once
|
|
|
|
#include "Vector2.h"
|
|
#include "SignedDistance.h"
|
|
#include "edge-segments.h"
|
|
|
|
namespace msdfgen {
|
|
|
|
struct MultiDistance {
|
|
double r, g, b;
|
|
};
|
|
|
|
/// Selects the nearest edge by its true distance.
|
|
class TrueDistanceSelector {
|
|
|
|
public:
|
|
typedef double DistanceType;
|
|
|
|
explicit TrueDistanceSelector(const Point2 &p = Point2());
|
|
void addEdge(const EdgeSegment *prevEdge, const EdgeSegment *edge, const EdgeSegment *nextEdge);
|
|
void merge(const TrueDistanceSelector &other);
|
|
DistanceType distance() const;
|
|
|
|
private:
|
|
Point2 p;
|
|
SignedDistance minDistance;
|
|
|
|
};
|
|
|
|
class PseudoDistanceSelectorBase {
|
|
|
|
public:
|
|
static bool pointFacingEdge(const EdgeSegment *prevEdge, const EdgeSegment *edge, const EdgeSegment *nextEdge, const Point2 &p, double param);
|
|
|
|
PseudoDistanceSelectorBase();
|
|
void addEdgeTrueDistance(const EdgeSegment *edge, const SignedDistance &distance, double param);
|
|
void addEdgePseudoDistance(const SignedDistance &distance);
|
|
void merge(const PseudoDistanceSelectorBase &other);
|
|
double computeDistance(const Point2 &p) const;
|
|
|
|
private:
|
|
SignedDistance minTrueDistance;
|
|
SignedDistance minNegativePseudoDistance;
|
|
SignedDistance minPositivePseudoDistance;
|
|
const EdgeSegment *nearEdge;
|
|
double nearEdgeParam;
|
|
|
|
};
|
|
|
|
/// Selects the nearest edge by its pseudo-distance.
|
|
class PseudoDistanceSelector : public PseudoDistanceSelectorBase {
|
|
|
|
public:
|
|
typedef double DistanceType;
|
|
|
|
explicit PseudoDistanceSelector(const Point2 &p = Point2());
|
|
void addEdge(const EdgeSegment *prevEdge, const EdgeSegment *edge, const EdgeSegment *nextEdge);
|
|
DistanceType distance() const;
|
|
|
|
private:
|
|
Point2 p;
|
|
|
|
};
|
|
|
|
/// Selects the nearest edge for each of the three channels by its pseudo-distance.
|
|
class MultiDistanceSelector {
|
|
|
|
public:
|
|
typedef MultiDistance DistanceType;
|
|
|
|
explicit MultiDistanceSelector(const Point2 &p = Point2());
|
|
void addEdge(const EdgeSegment *prevEdge, const EdgeSegment *edge, const EdgeSegment *nextEdge);
|
|
void merge(const MultiDistanceSelector &other);
|
|
DistanceType distance() const;
|
|
|
|
private:
|
|
Point2 p;
|
|
PseudoDistanceSelectorBase r, g, b;
|
|
|
|
};
|
|
|
|
}
|