27accef223
Review URL: https://codereview.appspot.com/5576043 git-svn-id: http://skia.googlecode.com/svn/trunk@3087 2bbb7eff-a529-9590-31e7-b0007b416f81
36 lines
1.8 KiB
C++
36 lines
1.8 KiB
C++
#include "DataTypes.h"
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class Intersections;
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// unit-testable utilities
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bool bezier_clip(const Cubic& cubic1, const Cubic& cubic2, double& minT, double& maxT);
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bool bezier_clip(const Quadratic& q1, const Quadratic& q2, double& minT, double& maxT);
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void chop_at(const Cubic& src, CubicPair& dst, double t);
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void chop_at(const Quadratic& src, QuadraticPair& dst, double t);
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int convex_hull(const Cubic& cubic, char order[4]);
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bool convex_x_hull(const Cubic& cubic, char connectTo0[2], char connectTo3[2]);
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bool implicit_matches(const Cubic& cubic1, const Cubic& cubic2);
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bool implicit_matches(const Quadratic& quad1, const Quadratic& quad2);
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void sub_divide(const Cubic& src, double t1, double t2, Cubic& dst);
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void sub_divide(const Quadratic& src, double t1, double t2, Quadratic& dst);
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void tangent(const Cubic& cubic, double t, _Point& result);
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void tangent(const Quadratic& cubic, double t, _Point& result);
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// utilities used only for unit testing
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bool point_on_parameterized_curve(const Cubic& cubic, const _Point& point);
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bool point_on_parameterized_curve(const Quadratic& quad, const _Point& point);
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// main functions
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enum ReduceOrder_Flags {
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kReduceOrder_NoQuadraticsAllowed,
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kReduceOrder_QuadraticsAllowed
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};
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int reduceOrder(const Cubic& cubic, Cubic& reduction, ReduceOrder_Flags );
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int reduceOrder(const _Line& line, _Line& reduction);
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int reduceOrder(const Quadratic& quad, Quadratic& reduction);
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//bool intersectStart(const Cubic& cubic1, const Cubic& cubic2, Intersections& );
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bool intersectStartT(const Cubic& cubic1, const Cubic& cubic2, Intersections& );
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bool intersectStart(const Cubic& cubic, const _Line& line, Intersections& );
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bool intersectStart(const Quadratic& q1, const Quadratic& q2, Intersections& );
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bool intersectStart(const Quadratic& quad, const _Line& line, Intersections& );
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