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/*
===========================================================================
Return to Castle Wolfenstein single player GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company.
This file is part of the Return to Castle Wolfenstein single player GPL Source Code (RTCW SP Source Code).
RTCW SP Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
RTCW SP Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with RTCW SP Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the RTCW SP Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the RTCW SP Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
//#define CULL_BBOX
/*
This file does not reference any globals, and has these entry points:
void CM_ClearLevelPatches( void );
struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, const vec3_t *points );
void CM_TraceThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
qboolean CM_PositionTestInPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc );
void CM_DrawDebugSurface( void (*drawPoly)(int color, int numPoints, flaot *points) );
Issues for collision against curved surfaces:
Surface edges need to be handled differently than surface planes
Plane expansion causes raw surfaces to expand past expanded bounding box
Position test of a volume against a surface is tricky.
Position test of a point against a surface is not well defined, because the surface has no volume.
Tracing leading edge points instead of volumes?
Position test by tracing corner to corner? (8*7 traces -- ouch)
coplanar edges
triangulated patches
degenerate patches
endcaps
degenerate
WARNING: this may misbehave with meshes that have rows or columns that only
degenerate a few triangles. Completely degenerate rows and columns are handled
properly.
*/
#define MAX_FACETS 1024
#define MAX_PATCH_PLANES 2048
typedef struct {
float plane[4];
int signbits; // signx + (signy<<1) + (signz<<2), used as lookup during collision
} patchPlane_t;
typedef struct {
int surfacePlane;
int numBorders; // 3 or four + 6 axial bevels + 4 or 3 * 4 edge bevels
int borderPlanes[4 + 6 + 16];
int borderInward[4 + 6 + 16];
qboolean borderNoAdjust[4 + 6 + 16];
} facet_t;
typedef struct patchCollide_s {
vec3_t bounds[2];
int numPlanes; // surface planes plus edge planes
patchPlane_t *planes;
int numFacets;
facet_t *facets;
} patchCollide_t;
#define MAX_GRID_SIZE 129
typedef struct {
int width;
int height;
qboolean wrapWidth;
qboolean wrapHeight;
vec3_t points[MAX_GRID_SIZE][MAX_GRID_SIZE]; // [width][height]
} cGrid_t;
#define SUBDIVIDE_DISTANCE 16 //4 // never more than this units away from curve
#define PLANE_TRI_EPSILON 0.1
#define WRAP_POINT_EPSILON 0.1
struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, vec3_t *points );
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