http://slackware.bholcomb.com/slackware/slackware-11.0/source/xap/xscreensaver/xscree...

[xscreensaver] / hacks / glx / glschool_alg.h

diff --git a/hacks/glx/glschool_alg.h b/hacks/glx/glschool_alg.h
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+++ b/hacks/glx/glschool_alg.h
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+/* glschool_alg.h, Copyright (c) 2005-2006 David C. Lambert <dcl@panix.com>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation.  No representations are made about the suitability of this
+ * software for any purpose.  It is provided "as is" without express or 
+ * implied warranty.
+ */
+#ifndef __GLSCHOOL_ALG_H__
+#define __GLSCHOOL_ALG_H__
+
+typedef struct {
+       double  mins[3];
+       double  maxs[3];
+} BBox;
+
+#define BBOX_XMIN(b)           ((b)->mins[0])
+#define BBOX_YMIN(b)           ((b)->mins[1])
+#define BBOX_ZMIN(b)           ((b)->mins[2])
+#define BBOX_MINS(b)           ((b)->mins)
+#define BBOX_IMIN(b, i)                ((b)->mins[(i)])
+
+#define BBOX_XMAX(b)           ((b)->maxs[0])
+#define BBOX_YMAX(b)           ((b)->maxs[1])
+#define BBOX_ZMAX(b)           ((b)->maxs[2])
+#define BBOX_MAXS(b)           ((b)->maxs)
+#define BBOX_IMAX(b, i)                ((b)->maxs[(i)])
+
+#define BBOX_IMID(b, i)                (((b)->maxs[(i)] + (b)->mins[(i)])/2.0)
+#define BBOX_IRANGE(b, i)      ((b)->maxs[(i)] - (b)->mins[(i)])
+
+typedef struct {
+       double                  pos[3];
+       double                  vel[3];
+       double                  accel[3];
+       double                  oldVel[3];
+       double                  magic[3];
+       double                  avgVel[3];
+} Fish;
+
+#define FISH_POS(f)                    ((f)->pos)
+#define FISH_X(f)                      ((f)->pos[0])
+#define FISH_Y(f)                      ((f)->pos[1])
+#define FISH_Z(f)                      ((f)->pos[2])
+
+#define FISH_VEL(f)                    ((f)->vel)
+#define FISH_VX(f)                     ((f)->vel[0])
+#define FISH_VY(f)                     ((f)->vel[1])
+#define FISH_VZ(f)                     ((f)->vel[2])
+
+#define FISH_ACC(f)                    ((f)->accel)
+#define FISH_MAGIC(f)          ((f)->magic)
+#define FISH_OLDVEL(f)         ((f)->oldVel)
+#define FISH_AVGVEL(f)         ((f)->avgVel)
+#define FISH_IPOS(f, i)                ((f)->pos[(i)])
+#define FISH_IVEL(f, i)                ((f)->vel[(i)])
+#define FISH_IACC(f, i)                ((f)->accel[(i)])
+#define FISH_IMAGIC(f, i)      ((f)->magic[(i)])
+#define FISH_IOLDVEL(f, i)     ((f)->oldVel[(i)])
+#define FISH_IAVGVEL(f, i)     ((f)->avgVel[(i)])
+
+typedef struct {
+       int                     nFish;
+       double          maxVel;
+       double          minVel;
+       double          distExp;
+       double          momentum;
+       double          accLimit;
+       double          minRadius;
+       double          minRadiusExp;
+       double          avoidFact;
+       double          matchFact;
+       double          centerFact;
+       double          targetFact;
+       double          distComp;
+       double          goal[3];
+       double          boxMids[3];
+       double          boxRanges[3];
+       BBox            theBox;
+       Fish            *theFish;
+} School;
+
+#define SCHOOL_NFISH(s)                        ((s)->nFish)
+#define SCHOOL_MAXVEL(s)               ((s)->maxVel)
+#define SCHOOL_MINVEL(s)               ((s)->minVel)
+#define SCHOOL_DISTEXP(s)              ((s)->distExp)
+#define SCHOOL_MOMENTUM(s)             ((s)->momentum)
+#define SCHOOL_ACCLIMIT(s)             ((s)->accLimit)
+#define SCHOOL_MINRADIUS(s)            ((s)->minRadius)
+#define SCHOOL_MINRADIUSEXP(s) ((s)->minRadiusExp)
+#define SCHOOL_MATCHFACT(s)            ((s)->matchFact)
+#define SCHOOL_AVOIDFACT(s)            ((s)->avoidFact)
+#define SCHOOL_CENTERFACT(s)   ((s)->centerFact)
+#define SCHOOL_TARGETFACT(s)   ((s)->targetFact)
+#define SCHOOL_DISTCOMP(s)             ((s)->distComp)
+#define SCHOOL_GOAL(s)                 ((s)->goal)
+#define SCHOOL_IGOAL(s,i)              ((s)->goal[(i)])
+#define SCHOOL_BBMINS(s)               ((s)->bbox.mins)
+#define SCHOOL_BBMAXS(s)               ((s)->bbox.maxs)
+#define SCHOOL_BBMIDS(s)               ((s)->boxMids)
+#define SCHOOL_IMID(s,i)               ((s)->boxMids[(i)])
+#define SCHOOL_BBRANGES(s)             ((s)->boxRanges)
+#define SCHOOL_IRANGE(s,i)             ((s)->boxRanges[(i)])
+#define SCHOOL_BBOX(s)                 ((s)->theBox)
+#define SCHOOL_FISHES(s)               ((s)->theFish)
+#define SCHOOL_IFISH(s,i)              ((s)->theFish[i])
+
+extern void            initFishes(School *);
+extern void            initFish(Fish *, double *, double *);
+
+extern void            applyMovements(School *);
+extern void            applyFishMovements(Fish *, BBox *, double, double, double);
+
+extern void            freeSchool(School *);
+extern School          *initSchool(int, double, double, double, double, double, double, double, double, double, double, double);
+
+extern void            newGoal(School *);
+extern void            setBBox(School *, double, double, double, double, double, double);
+
+extern void            computeAccelerations(School *);
+extern double          computeNormalAndThetaToPlusZ(double *, double *);
+int                    computeGroupVectors(School *, Fish *, double *, double *, double *);
+
+#endif /* __GLSCHOOL_ALG_H__ */