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55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
/**************************************************************************************************
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"POLYMOST" code written by Ken Silverman
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**************************************************************************************************/
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#include "c_cvars.h"
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typedef void (*pmostcallbacktype)(double *dpx, double *dpy, int n, void *userdata);
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class PolyClipper
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{
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public:
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PolyClipper();
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~PolyClipper();
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void InitMosts (double *px, double *py, int n);
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bool TestVisibleMost (float x0, float x1);
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int DoMost (float x0, float y0, float x1, float y1, pmostcallbacktype callback, void *callbackdata);
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private:
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struct vsptype
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{
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float X, Cy[2], Fy[2];
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int Tag, CTag, FTag;
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vsptype *Next, *Prev;
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};
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enum { GROUP_SIZE = 128 };
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struct vspgroup
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{
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vspgroup (vsptype *sentinel);
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vspgroup *NextGroup;
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vsptype vsp[GROUP_SIZE];
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};
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vsptype EmptyList;
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vsptype UsedList;
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vspgroup vsps;
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vsptype Solid;
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int GTag;
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vsptype *vsinsaft (vsptype *vsp);
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void EmptyAll ();
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void AddGroup ();
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vsptype *GetVsp ();
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void FreeVsp (vsptype *vsp);
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friend void drawpolymosttest();
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};
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extern void drawpolymosttest();
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struct event_t; void Polymost_Responder (event_t *ev);
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