110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1997 Greg Lewis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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*/
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#ifndef QBSP_MATHLIB_HH
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#define QBSP_MATHLIB_HH
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#ifdef DOUBLEVEC_T
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#define vec_t double
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#define VECT_MAX DBL_MAX
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#else
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#define vec_t float
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#define VECT_MAX FLT_MAX
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#endif
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typedef vec_t vec3_t[3];
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extern const vec3_t vec3_origin;
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bool VectorCompare(const vec3_t v1, const vec3_t v2);
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vec_t Q_rint(vec_t in);
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extern vec_t DotProduct(const vec3_t v1, const vec3_t v2);
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extern void VectorSubtract(const vec3_t va, const vec3_t vb, vec3_t out);
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extern void VectorAdd(const vec3_t va, const vec3_t vb, vec3_t out);
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extern void VectorCopy(const vec3_t in, vec3_t out);
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vec_t VectorLengthSq(const vec3_t v);
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vec_t VectorLength(const vec3_t v);
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void VectorMA(const vec3_t va, const double scale, const vec3_t vb, vec3_t vc);
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void CrossProduct(const vec3_t v1, const vec3_t v2, vec3_t cross);
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vec_t VectorNormalize(vec3_t v);
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void VectorInverse(vec3_t v);
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void VectorScale(const vec3_t v, const vec_t scale, vec3_t out);
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float SignedDegreesBetweenUnitVectors(const vec3_t start, const vec3_t end, const vec3_t normal);
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#ifdef __GNUC__
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/* min and max macros with type checking */
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#define qmax(a,b) ({ \
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typeof(a) a_ = (a); \
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typeof(b) b_ = (b); \
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(void)(&a_ == &b_); \
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(a_ > b_) ? a_ : b_; \
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})
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#define qmin(a,b) ({ \
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typeof(a) a_ = (a); \
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typeof(b) b_ = (b); \
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(void)(&a_ == &b_); \
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(a_ < b_) ? a_ : b_; \
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})
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#else
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#define qmax(a,b) (((a)>(b)) ? (a) : (b))
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#define qmin(a,b) (((a)>(b)) ? (b) : (a))
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#endif
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#define stringify__(x) #x
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#define stringify(x) stringify__(x)
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//====== bsp5.h
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typedef struct plane {
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vec3_t normal;
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vec_t dist;
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int type;
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struct plane *hash_chain;
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} plane_t;
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//============================================================================
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typedef struct {
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int numpoints;
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vec3_t points[MAXEDGES]; // variable sized
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} winding_t;
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winding_t *BaseWindingForPlane(const plane_t *p);
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void CheckWinding(const winding_t *w);
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winding_t *NewWinding(int points);
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void FreeWinding(winding_t *w);
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winding_t *CopyWinding(const winding_t *w);
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winding_t *ClipWinding(winding_t *in, const plane_t *split, bool keepon);
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void DivideWinding(winding_t *in, const plane_t *split, winding_t **front,
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winding_t **back);
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void MidpointWinding(const winding_t *w, vec3_t v);
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/* Helper function for ClipWinding and it's variants */
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void CalcSides(const winding_t *in, const plane_t *split, int *sides,
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vec_t *dists, int counts[3]);
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#endif
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