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diff --git a/src/qcommon/cm_patch.c b/src/qcommon/cm_patch.c
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+++ b/src/qcommon/cm_patch.c
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+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2006 Tim Angus
+
+This file is part of Tremulous.
+
+Tremulous 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 2 of the License,
+or (at your option) any later version.
+
+Tremulous 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 Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+#include "cm_local.h"
+#include "cm_patch.h"
+
+/*
+
+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) );
+
+
+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
+*/
+
+int c_totalPatchBlocks;
+int c_totalPatchSurfaces;
+int c_totalPatchEdges;
+
+static const patchCollide_t *debugPatchCollide;
+static const facet_t *debugFacet;
+static qboolean debugBlock;
+static vec3_t debugBlockPoints[4];
+
+/*
+=================
+CM_ClearLevelPatches
+=================
+*/
+void CM_ClearLevelPatches( void ) {
+ debugPatchCollide = NULL;
+ debugFacet = NULL;
+}
+
+/*
+=================
+CM_SignbitsForNormal
+=================
+*/
+static int CM_SignbitsForNormal( vec3_t normal ) {
+ int bits, j;
+
+ bits = 0;
+ for (j=0 ; j<3 ; j++) {
+ if ( normal[j] < 0 ) {
+ bits |= 1<<j;
+ }
+ }
+ return bits;
+}
+
+/*
+=====================
+CM_PlaneFromPoints
+
+Returns false if the triangle is degenrate.
+The normal will point out of the clock for clockwise ordered points
+=====================
+*/
+static qboolean CM_PlaneFromPoints( vec4_t plane, vec3_t a, vec3_t b, vec3_t c ) {
+ vec3_t d1, d2;
+
+ VectorSubtract( b, a, d1 );
+ VectorSubtract( c, a, d2 );
+ CrossProduct( d2, d1, plane );
+ if ( VectorNormalize( plane ) == 0 ) {
+ return qfalse;
+ }
+
+ plane[3] = DotProduct( a, plane );
+ return qtrue;
+}
+
+
+/*
+================================================================================
+
+GRID SUBDIVISION
+
+================================================================================
+*/
+
+/*
+=================
+CM_NeedsSubdivision
+
+Returns true if the given quadratic curve is not flat enough for our
+collision detection purposes
+=================
+*/
+static qboolean CM_NeedsSubdivision( vec3_t a, vec3_t b, vec3_t c ) {
+ vec3_t cmid;
+ vec3_t lmid;
+ vec3_t delta;
+ float dist;
+ int i;
+
+ // calculate the linear midpoint
+ for ( i = 0 ; i < 3 ; i++ ) {
+ lmid[i] = 0.5*(a[i] + c[i]);
+ }
+
+ // calculate the exact curve midpoint
+ for ( i = 0 ; i < 3 ; i++ ) {
+ cmid[i] = 0.5 * ( 0.5*(a[i] + b[i]) + 0.5*(b[i] + c[i]) );
+ }
+
+ // see if the curve is far enough away from the linear mid
+ VectorSubtract( cmid, lmid, delta );
+ dist = VectorLength( delta );
+
+ return dist >= SUBDIVIDE_DISTANCE;
+}
+
+/*
+===============
+CM_Subdivide
+
+a, b, and c are control points.
+the subdivided sequence will be: a, out1, out2, out3, c
+===============
+*/
+static void CM_Subdivide( vec3_t a, vec3_t b, vec3_t c, vec3_t out1, vec3_t out2, vec3_t out3 ) {
+ int i;
+
+ for ( i = 0 ; i < 3 ; i++ ) {
+ out1[i] = 0.5 * (a[i] + b[i]);
+ out3[i] = 0.5 * (b[i] + c[i]);
+ out2[i] = 0.5 * (out1[i] + out3[i]);
+ }
+}
+
+/*
+=================
+CM_TransposeGrid
+
+Swaps the rows and columns in place
+=================
+*/
+static void CM_TransposeGrid( cGrid_t *grid ) {
+ int i, j, l;
+ vec3_t temp;
+ qboolean tempWrap;
+
+ if ( grid->width > grid->height ) {
+ for ( i = 0 ; i < grid->height ; i++ ) {
+ for ( j = i + 1 ; j < grid->width ; j++ ) {
+ if ( j < grid->height ) {
+ // swap the value
+ VectorCopy( grid->points[i][j], temp );
+ VectorCopy( grid->points[j][i], grid->points[i][j] );
+ VectorCopy( temp, grid->points[j][i] );
+ } else {
+ // just copy
+ VectorCopy( grid->points[j][i], grid->points[i][j] );
+ }
+ }
+ }
+ } else {
+ for ( i = 0 ; i < grid->width ; i++ ) {
+ for ( j = i + 1 ; j < grid->height ; j++ ) {
+ if ( j < grid->width ) {
+ // swap the value
+ VectorCopy( grid->points[j][i], temp );
+ VectorCopy( grid->points[i][j], grid->points[j][i] );
+ VectorCopy( temp, grid->points[i][j] );
+ } else {
+ // just copy
+ VectorCopy( grid->points[i][j], grid->points[j][i] );
+ }
+ }
+ }
+ }
+
+ l = grid->width;
+ grid->width = grid->height;
+ grid->height = l;
+
+ tempWrap = grid->wrapWidth;
+ grid->wrapWidth = grid->wrapHeight;
+ grid->wrapHeight = tempWrap;
+}
+
+/*
+===================
+CM_SetGridWrapWidth
+
+If the left and right columns are exactly equal, set grid->wrapWidth qtrue
+===================
+*/
+static void CM_SetGridWrapWidth( cGrid_t *grid ) {
+ int i, j;
+ float d;
+
+ for ( i = 0 ; i < grid->height ; i++ ) {
+ for ( j = 0 ; j < 3 ; j++ ) {
+ d = grid->points[0][i][j] - grid->points[grid->width-1][i][j];
+ if ( d < -WRAP_POINT_EPSILON || d > WRAP_POINT_EPSILON ) {
+ break;
+ }
+ }
+ if ( j != 3 ) {
+ break;
+ }
+ }
+ if ( i == grid->height ) {
+ grid->wrapWidth = qtrue;
+ } else {
+ grid->wrapWidth = qfalse;
+ }
+}
+
+/*
+=================
+CM_SubdivideGridColumns
+
+Adds columns as necessary to the grid until
+all the aproximating points are within SUBDIVIDE_DISTANCE
+from the true curve
+=================
+*/
+static void CM_SubdivideGridColumns( cGrid_t *grid ) {
+ int i, j, k;
+
+ for ( i = 0 ; i < grid->width - 2 ; ) {
+ // grid->points[i][x] is an interpolating control point
+ // grid->points[i+1][x] is an aproximating control point
+ // grid->points[i+2][x] is an interpolating control point
+
+ //
+ // first see if we can collapse the aproximating collumn away
+ //
+ for ( j = 0 ; j < grid->height ; j++ ) {
+ if ( CM_NeedsSubdivision( grid->points[i][j], grid->points[i+1][j], grid->points[i+2][j] ) ) {
+ break;
+ }
+ }
+ if ( j == grid->height ) {
+ // all of the points were close enough to the linear midpoints
+ // that we can collapse the entire column away
+ for ( j = 0 ; j < grid->height ; j++ ) {
+ // remove the column
+ for ( k = i + 2 ; k < grid->width ; k++ ) {
+ VectorCopy( grid->points[k][j], grid->points[k-1][j] );
+ }
+ }
+
+ grid->width--;
+
+ // go to the next curve segment
+ i++;
+ continue;
+ }
+
+ //
+ // we need to subdivide the curve
+ //
+ for ( j = 0 ; j < grid->height ; j++ ) {
+ vec3_t prev, mid, next;
+
+ // save the control points now
+ VectorCopy( grid->points[i][j], prev );
+ VectorCopy( grid->points[i+1][j], mid );
+ VectorCopy( grid->points[i+2][j], next );
+
+ // make room for two additional columns in the grid
+ // columns i+1 will be replaced, column i+2 will become i+4
+ // i+1, i+2, and i+3 will be generated
+ for ( k = grid->width - 1 ; k > i + 1 ; k-- ) {
+ VectorCopy( grid->points[k][j], grid->points[k+2][j] );
+ }
+
+ // generate the subdivided points
+ CM_Subdivide( prev, mid, next, grid->points[i+1][j], grid->points[i+2][j], grid->points[i+3][j] );
+ }
+
+ grid->width += 2;
+
+ // the new aproximating point at i+1 may need to be removed
+ // or subdivided farther, so don't advance i
+ }
+}
+
+/*
+======================
+CM_ComparePoints
+======================
+*/
+#define POINT_EPSILON 0.1
+static qboolean CM_ComparePoints( float *a, float *b ) {
+ float d;
+
+ d = a[0] - b[0];
+ if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
+ return qfalse;
+ }
+ d = a[1] - b[1];
+ if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
+ return qfalse;
+ }
+ d = a[2] - b[2];
+ if ( d < -POINT_EPSILON || d > POINT_EPSILON ) {
+ return qfalse;
+ }
+ return qtrue;
+}
+
+/*
+=================
+CM_RemoveDegenerateColumns
+
+If there are any identical columns, remove them
+=================
+*/
+static void CM_RemoveDegenerateColumns( cGrid_t *grid ) {
+ int i, j, k;
+
+ for ( i = 0 ; i < grid->width - 1 ; i++ ) {
+ for ( j = 0 ; j < grid->height ; j++ ) {
+ if ( !CM_ComparePoints( grid->points[i][j], grid->points[i+1][j] ) ) {
+ break;
+ }
+ }
+
+ if ( j != grid->height ) {
+ continue; // not degenerate
+ }
+
+ for ( j = 0 ; j < grid->height ; j++ ) {
+ // remove the column
+ for ( k = i + 2 ; k < grid->width ; k++ ) {
+ VectorCopy( grid->points[k][j], grid->points[k-1][j] );
+ }
+ }
+ grid->width--;
+
+ // check against the next column
+ i--;
+ }
+}
+
+/*
+================================================================================
+
+PATCH COLLIDE GENERATION
+
+================================================================================
+*/
+
+static int numPlanes;
+static patchPlane_t planes[MAX_PATCH_PLANES];
+
+static int numFacets;
+static facet_t facets[MAX_PATCH_PLANES]; //maybe MAX_FACETS ??
+
+#define NORMAL_EPSILON 0.0001
+#define DIST_EPSILON 0.02
+
+/*
+==================
+CM_PlaneEqual
+==================
+*/
+int CM_PlaneEqual(patchPlane_t *p, float plane[4], int *flipped) {
+ float invplane[4];
+
+ if (
+ fabs(p->plane[0] - plane[0]) < NORMAL_EPSILON
+ && fabs(p->plane[1] - plane[1]) < NORMAL_EPSILON
+ && fabs(p->plane[2] - plane[2]) < NORMAL_EPSILON
+ && fabs(p->plane[3] - plane[3]) < DIST_EPSILON )
+ {
+ *flipped = qfalse;
+ return qtrue;
+ }
+
+ VectorNegate(plane, invplane);
+ invplane[3] = -plane[3];
+
+ if (
+ fabs(p->plane[0] - invplane[0]) < NORMAL_EPSILON
+ && fabs(p->plane[1] - invplane[1]) < NORMAL_EPSILON
+ && fabs(p->plane[2] - invplane[2]) < NORMAL_EPSILON
+ && fabs(p->plane[3] - invplane[3]) < DIST_EPSILON )
+ {
+ *flipped = qtrue;
+ return qtrue;
+ }
+
+ return qfalse;
+}
+
+/*
+==================
+CM_SnapVector
+==================
+*/
+void CM_SnapVector(vec3_t normal) {
+ int i;
+
+ for (i=0 ; i<3 ; i++)
+ {
+ if ( fabs(normal[i] - 1) < NORMAL_EPSILON )
+ {
+ VectorClear (normal);
+ normal[i] = 1;
+ break;
+ }
+ if ( fabs(normal[i] - -1) < NORMAL_EPSILON )
+ {
+ VectorClear (normal);
+ normal[i] = -1;
+ break;
+ }
+ }
+}
+
+/*
+==================
+CM_FindPlane2
+==================
+*/
+int CM_FindPlane2(float plane[4], int *flipped) {
+ int i;
+
+ // see if the points are close enough to an existing plane
+ for ( i = 0 ; i < numPlanes ; i++ ) {
+ if (CM_PlaneEqual(&planes[i], plane, flipped)) return i;
+ }
+
+ // add a new plane
+ if ( numPlanes == MAX_PATCH_PLANES ) {
+ Com_Error( ERR_DROP, "MAX_PATCH_PLANES" );
+ }
+
+ Vector4Copy( plane, planes[numPlanes].plane );
+ planes[numPlanes].signbits = CM_SignbitsForNormal( plane );
+
+ numPlanes++;
+
+ *flipped = qfalse;
+
+ return numPlanes-1;
+}
+
+/*
+==================
+CM_FindPlane
+==================
+*/
+static int CM_FindPlane( float *p1, float *p2, float *p3 ) {
+ float plane[4];
+ int i;
+ float d;
+
+ if ( !CM_PlaneFromPoints( plane, p1, p2, p3 ) ) {
+ return -1;
+ }
+
+ // see if the points are close enough to an existing plane
+ for ( i = 0 ; i < numPlanes ; i++ ) {
+ if ( DotProduct( plane, planes[i].plane ) < 0 ) {
+ continue; // allow backwards planes?
+ }
+
+ d = DotProduct( p1, planes[i].plane ) - planes[i].plane[3];
+ if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
+ continue;
+ }
+
+ d = DotProduct( p2, planes[i].plane ) - planes[i].plane[3];
+ if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
+ continue;
+ }
+
+ d = DotProduct( p3, planes[i].plane ) - planes[i].plane[3];
+ if ( d < -PLANE_TRI_EPSILON || d > PLANE_TRI_EPSILON ) {
+ continue;
+ }
+
+ // found it
+ return i;
+ }
+
+ // add a new plane
+ if ( numPlanes == MAX_PATCH_PLANES ) {
+ Com_Error( ERR_DROP, "MAX_PATCH_PLANES" );
+ }
+
+ Vector4Copy( plane, planes[numPlanes].plane );
+ planes[numPlanes].signbits = CM_SignbitsForNormal( plane );
+
+ numPlanes++;
+
+ return numPlanes-1;
+}
+
+/*
+==================
+CM_PointOnPlaneSide
+==================
+*/
+static int CM_PointOnPlaneSide( float *p, int planeNum ) {
+ float *plane;
+ float d;
+
+ if ( planeNum == -1 ) {
+ return SIDE_ON;
+ }
+ plane = planes[ planeNum ].plane;
+
+ d = DotProduct( p, plane ) - plane[3];
+
+ if ( d > PLANE_TRI_EPSILON ) {
+ return SIDE_FRONT;
+ }
+
+ if ( d < -PLANE_TRI_EPSILON ) {
+ return SIDE_BACK;
+ }
+
+ return SIDE_ON;
+}
+
+/*
+==================
+CM_GridPlane
+==================
+*/
+static int CM_GridPlane( int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2], int i, int j, int tri ) {
+ int p;
+
+ p = gridPlanes[i][j][tri];
+ if ( p != -1 ) {
+ return p;
+ }
+ p = gridPlanes[i][j][!tri];
+ if ( p != -1 ) {
+ return p;
+ }
+
+ // should never happen
+ Com_Printf( "WARNING: CM_GridPlane unresolvable\n" );
+ return -1;
+}
+
+/*
+==================
+CM_EdgePlaneNum
+==================
+*/
+static int CM_EdgePlaneNum( cGrid_t *grid, int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2], int i, int j, int k ) {
+ float *p1, *p2;
+ vec3_t up;
+ int p;
+
+ switch ( k ) {
+ case 0: // top border
+ p1 = grid->points[i][j];
+ p2 = grid->points[i+1][j];
+ p = CM_GridPlane( gridPlanes, i, j, 0 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p1, p2, up );
+
+ case 2: // bottom border
+ p1 = grid->points[i][j+1];
+ p2 = grid->points[i+1][j+1];
+ p = CM_GridPlane( gridPlanes, i, j, 1 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p2, p1, up );
+
+ case 3: // left border
+ p1 = grid->points[i][j];
+ p2 = grid->points[i][j+1];
+ p = CM_GridPlane( gridPlanes, i, j, 1 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p2, p1, up );
+
+ case 1: // right border
+ p1 = grid->points[i+1][j];
+ p2 = grid->points[i+1][j+1];
+ p = CM_GridPlane( gridPlanes, i, j, 0 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p1, p2, up );
+
+ case 4: // diagonal out of triangle 0
+ p1 = grid->points[i+1][j+1];
+ p2 = grid->points[i][j];
+ p = CM_GridPlane( gridPlanes, i, j, 0 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p1, p2, up );
+
+ case 5: // diagonal out of triangle 1
+ p1 = grid->points[i][j];
+ p2 = grid->points[i+1][j+1];
+ p = CM_GridPlane( gridPlanes, i, j, 1 );
+ VectorMA( p1, 4, planes[ p ].plane, up );
+ return CM_FindPlane( p1, p2, up );
+
+ }
+
+ Com_Error( ERR_DROP, "CM_EdgePlaneNum: bad k" );
+ return -1;
+}
+
+/*
+===================
+CM_SetBorderInward
+===================
+*/
+static void CM_SetBorderInward( facet_t *facet, cGrid_t *grid, int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2],
+ int i, int j, int which ) {
+ int k, l;
+ float *points[4];
+ int numPoints;
+
+ switch ( which ) {
+ case -1:
+ points[0] = grid->points[i][j];
+ points[1] = grid->points[i+1][j];
+ points[2] = grid->points[i+1][j+1];
+ points[3] = grid->points[i][j+1];
+ numPoints = 4;
+ break;
+ case 0:
+ points[0] = grid->points[i][j];
+ points[1] = grid->points[i+1][j];
+ points[2] = grid->points[i+1][j+1];
+ numPoints = 3;
+ break;
+ case 1:
+ points[0] = grid->points[i+1][j+1];
+ points[1] = grid->points[i][j+1];
+ points[2] = grid->points[i][j];
+ numPoints = 3;
+ break;
+ default:
+ Com_Error( ERR_FATAL, "CM_SetBorderInward: bad parameter" );
+ numPoints = 0;
+ break;
+ }
+
+ for ( k = 0 ; k < facet->numBorders ; k++ ) {
+ int front, back;
+
+ front = 0;
+ back = 0;
+
+ for ( l = 0 ; l < numPoints ; l++ ) {
+ int side;
+
+ side = CM_PointOnPlaneSide( points[l], facet->borderPlanes[k] );
+ if ( side == SIDE_FRONT ) {
+ front++;
+ } if ( side == SIDE_BACK ) {
+ back++;
+ }
+ }
+
+ if ( front && !back ) {
+ facet->borderInward[k] = qtrue;
+ } else if ( back && !front ) {
+ facet->borderInward[k] = qfalse;
+ } else if ( !front && !back ) {
+ // flat side border
+ facet->borderPlanes[k] = -1;
+ } else {
+ // bisecting side border
+ Com_DPrintf( "WARNING: CM_SetBorderInward: mixed plane sides\n" );
+ facet->borderInward[k] = qfalse;
+ if ( !debugBlock ) {
+ debugBlock = qtrue;
+ VectorCopy( grid->points[i][j], debugBlockPoints[0] );
+ VectorCopy( grid->points[i+1][j], debugBlockPoints[1] );
+ VectorCopy( grid->points[i+1][j+1], debugBlockPoints[2] );
+ VectorCopy( grid->points[i][j+1], debugBlockPoints[3] );
+ }
+ }
+ }
+}
+
+/*
+==================
+CM_ValidateFacet
+
+If the facet isn't bounded by its borders, we screwed up.
+==================
+*/
+static qboolean CM_ValidateFacet( facet_t *facet ) {
+ float plane[4];
+ int j;
+ winding_t *w;
+ vec3_t bounds[2];
+
+ if ( facet->surfacePlane == -1 ) {
+ return qfalse;
+ }
+
+ Vector4Copy( planes[ facet->surfacePlane ].plane, plane );
+ w = BaseWindingForPlane( plane, plane[3] );
+ for ( j = 0 ; j < facet->numBorders && w ; j++ ) {
+ if ( facet->borderPlanes[j] == -1 ) {
+ FreeWinding( w );
+ return qfalse;
+ }
+ Vector4Copy( planes[ facet->borderPlanes[j] ].plane, plane );
+ if ( !facet->borderInward[j] ) {
+ VectorSubtract( vec3_origin, plane, plane );
+ plane[3] = -plane[3];
+ }
+ ChopWindingInPlace( &w, plane, plane[3], 0.1f );
+ }
+
+ if ( !w ) {
+ return qfalse; // winding was completely chopped away
+ }
+
+ // see if the facet is unreasonably large
+ WindingBounds( w, bounds[0], bounds[1] );
+ FreeWinding( w );
+
+ for ( j = 0 ; j < 3 ; j++ ) {
+ if ( bounds[1][j] - bounds[0][j] > MAX_MAP_BOUNDS ) {
+ return qfalse; // we must be missing a plane
+ }
+ if ( bounds[0][j] >= MAX_MAP_BOUNDS ) {
+ return qfalse;
+ }
+ if ( bounds[1][j] <= -MAX_MAP_BOUNDS ) {
+ return qfalse;
+ }
+ }
+ return qtrue; // winding is fine
+}
+
+/*
+==================
+CM_AddFacetBevels
+==================
+*/
+void CM_AddFacetBevels( facet_t *facet ) {
+
+ int i, j, k, l;
+ int axis, dir, order, flipped;
+ float plane[4], d, newplane[4];
+ winding_t *w, *w2;
+ vec3_t mins, maxs, vec, vec2;
+
+ Vector4Copy( planes[ facet->surfacePlane ].plane, plane );
+
+ w = BaseWindingForPlane( plane, plane[3] );
+ for ( j = 0 ; j < facet->numBorders && w ; j++ ) {
+ if (facet->borderPlanes[j] == facet->surfacePlane) continue;
+ Vector4Copy( planes[ facet->borderPlanes[j] ].plane, plane );
+
+ if ( !facet->borderInward[j] ) {
+ VectorSubtract( vec3_origin, plane, plane );
+ plane[3] = -plane[3];
+ }
+
+ ChopWindingInPlace( &w, plane, plane[3], 0.1f );
+ }
+ if ( !w ) {
+ return;
+ }
+
+ WindingBounds(w, mins, maxs);
+
+ // add the axial planes
+ order = 0;
+ for ( axis = 0 ; axis < 3 ; axis++ )
+ {
+ for ( dir = -1 ; dir <= 1 ; dir += 2, order++ )
+ {
+ VectorClear(plane);
+ plane[axis] = dir;
+ if (dir == 1) {
+ plane[3] = maxs[axis];
+ }
+ else {
+ plane[3] = -mins[axis];
+ }
+ //if it's the surface plane
+ if (CM_PlaneEqual(&planes[facet->surfacePlane], plane, &flipped)) {
+ continue;
+ }
+ // see if the plane is allready present
+ for ( i = 0 ; i < facet->numBorders ; i++ ) {
+ if (CM_PlaneEqual(&planes[facet->borderPlanes[i]], plane, &flipped))
+ break;
+ }
+
+ if ( i == facet->numBorders ) {
+ if (facet->numBorders > 4 + 6 + 16) Com_Printf("ERROR: too many bevels\n");
+ facet->borderPlanes[facet->numBorders] = CM_FindPlane2(plane, &flipped);
+ facet->borderNoAdjust[facet->numBorders] = 0;
+ facet->borderInward[facet->numBorders] = flipped;
+ facet->numBorders++;
+ }
+ }
+ }
+ //
+ // add the edge bevels
+ //
+ // test the non-axial plane edges
+ for ( j = 0 ; j < w->numpoints ; j++ )
+ {
+ k = (j+1)%w->numpoints;
+ VectorSubtract (w->p[j], w->p[k], vec);
+ //if it's a degenerate edge
+ if (VectorNormalize (vec) < 0.5)
+ continue;
+ CM_SnapVector(vec);
+ for ( k = 0; k < 3 ; k++ )
+ if ( vec[k] == -1 || vec[k] == 1 )
+ break; // axial
+ if ( k < 3 )
+ continue; // only test non-axial edges
+
+ // try the six possible slanted axials from this edge
+ for ( axis = 0 ; axis < 3 ; axis++ )
+ {
+ for ( dir = -1 ; dir <= 1 ; dir += 2 )
+ {
+ // construct a plane
+ VectorClear (vec2);
+ vec2[axis] = dir;
+ CrossProduct (vec, vec2, plane);
+ if (VectorNormalize (plane) < 0.5)
+ continue;
+ plane[3] = DotProduct (w->p[j], plane);
+
+ // if all the points of the facet winding are
+ // behind this plane, it is a proper edge bevel
+ for ( l = 0 ; l < w->numpoints ; l++ )
+ {
+ d = DotProduct (w->p[l], plane) - plane[3];
+ if (d > 0.1)
+ break; // point in front
+ }
+ if ( l < w->numpoints )
+ continue;
+
+ //if it's the surface plane
+ if (CM_PlaneEqual(&planes[facet->surfacePlane], plane, &flipped)) {
+ continue;
+ }
+ // see if the plane is allready present
+ for ( i = 0 ; i < facet->numBorders ; i++ ) {
+ if (CM_PlaneEqual(&planes[facet->borderPlanes[i]], plane, &flipped)) {
+ break;
+ }
+ }
+
+ if ( i == facet->numBorders ) {
+ if (facet->numBorders > 4 + 6 + 16) Com_Printf("ERROR: too many bevels\n");
+ facet->borderPlanes[facet->numBorders] = CM_FindPlane2(plane, &flipped);
+
+ for ( k = 0 ; k < facet->numBorders ; k++ ) {
+ if (facet->borderPlanes[facet->numBorders] ==
+ facet->borderPlanes[k]) Com_Printf("WARNING: bevel plane already used\n");
+ }
+
+ facet->borderNoAdjust[facet->numBorders] = 0;
+ facet->borderInward[facet->numBorders] = flipped;
+ //
+ w2 = CopyWinding(w);
+ Vector4Copy(planes[facet->borderPlanes[facet->numBorders]].plane, newplane);
+ if (!facet->borderInward[facet->numBorders])
+ {
+ VectorNegate(newplane, newplane);
+ newplane[3] = -newplane[3];
+ } //end if
+ ChopWindingInPlace( &w2, newplane, newplane[3], 0.1f );
+ if (!w2) {
+ Com_DPrintf("WARNING: CM_AddFacetBevels... invalid bevel\n");
+ continue;
+ }
+ else {
+ FreeWinding(w2);
+ }
+ //
+ facet->numBorders++;
+ //already got a bevel
+// break;
+ }
+ }
+ }
+ }
+ FreeWinding( w );
+
+#ifndef BSPC
+ //add opposite plane
+ facet->borderPlanes[facet->numBorders] = facet->surfacePlane;
+ facet->borderNoAdjust[facet->numBorders] = 0;
+ facet->borderInward[facet->numBorders] = qtrue;
+ facet->numBorders++;
+#endif //BSPC
+
+}
+
+typedef enum {
+ EN_TOP,
+ EN_RIGHT,
+ EN_BOTTOM,
+ EN_LEFT
+} edgeName_t;
+
+/*
+==================
+CM_PatchCollideFromGrid
+==================
+*/
+static void CM_PatchCollideFromGrid( cGrid_t *grid, patchCollide_t *pf ) {
+ int i, j;
+ float *p1, *p2, *p3;
+ int gridPlanes[MAX_GRID_SIZE][MAX_GRID_SIZE][2];
+ facet_t *facet;
+ int borders[4];
+ int noAdjust[4];
+
+ numPlanes = 0;
+ numFacets = 0;
+
+ // find the planes for each triangle of the grid
+ for ( i = 0 ; i < grid->width - 1 ; i++ ) {
+ for ( j = 0 ; j < grid->height - 1 ; j++ ) {
+ p1 = grid->points[i][j];
+ p2 = grid->points[i+1][j];
+ p3 = grid->points[i+1][j+1];
+ gridPlanes[i][j][0] = CM_FindPlane( p1, p2, p3 );
+
+ p1 = grid->points[i+1][j+1];
+ p2 = grid->points[i][j+1];
+ p3 = grid->points[i][j];
+ gridPlanes[i][j][1] = CM_FindPlane( p1, p2, p3 );
+ }
+ }
+
+ // create the borders for each facet
+ for ( i = 0 ; i < grid->width - 1 ; i++ ) {
+ for ( j = 0 ; j < grid->height - 1 ; j++ ) {
+
+ borders[EN_TOP] = -1;
+ if ( j > 0 ) {
+ borders[EN_TOP] = gridPlanes[i][j-1][1];
+ } else if ( grid->wrapHeight ) {
+ borders[EN_TOP] = gridPlanes[i][grid->height-2][1];
+ }
+ noAdjust[EN_TOP] = ( borders[EN_TOP] == gridPlanes[i][j][0] );
+ if ( borders[EN_TOP] == -1 || noAdjust[EN_TOP] ) {
+ borders[EN_TOP] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 0 );
+ }
+
+ borders[EN_BOTTOM] = -1;
+ if ( j < grid->height - 2 ) {
+ borders[EN_BOTTOM] = gridPlanes[i][j+1][0];
+ } else if ( grid->wrapHeight ) {
+ borders[EN_BOTTOM] = gridPlanes[i][0][0];
+ }
+ noAdjust[EN_BOTTOM] = ( borders[EN_BOTTOM] == gridPlanes[i][j][1] );
+ if ( borders[EN_BOTTOM] == -1 || noAdjust[EN_BOTTOM] ) {
+ borders[EN_BOTTOM] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 2 );
+ }
+
+ borders[EN_LEFT] = -1;
+ if ( i > 0 ) {
+ borders[EN_LEFT] = gridPlanes[i-1][j][0];
+ } else if ( grid->wrapWidth ) {
+ borders[EN_LEFT] = gridPlanes[grid->width-2][j][0];
+ }
+ noAdjust[EN_LEFT] = ( borders[EN_LEFT] == gridPlanes[i][j][1] );
+ if ( borders[EN_LEFT] == -1 || noAdjust[EN_LEFT] ) {
+ borders[EN_LEFT] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 3 );
+ }
+
+ borders[EN_RIGHT] = -1;
+ if ( i < grid->width - 2 ) {
+ borders[EN_RIGHT] = gridPlanes[i+1][j][1];
+ } else if ( grid->wrapWidth ) {
+ borders[EN_RIGHT] = gridPlanes[0][j][1];
+ }
+ noAdjust[EN_RIGHT] = ( borders[EN_RIGHT] == gridPlanes[i][j][0] );
+ if ( borders[EN_RIGHT] == -1 || noAdjust[EN_RIGHT] ) {
+ borders[EN_RIGHT] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 1 );
+ }
+
+ if ( numFacets == MAX_FACETS ) {
+ Com_Error( ERR_DROP, "MAX_FACETS" );
+ }
+ facet = &facets[numFacets];
+ Com_Memset( facet, 0, sizeof( *facet ) );
+
+ if ( gridPlanes[i][j][0] == gridPlanes[i][j][1] ) {
+ if ( gridPlanes[i][j][0] == -1 ) {
+ continue; // degenrate
+ }
+ facet->surfacePlane = gridPlanes[i][j][0];
+ facet->numBorders = 4;
+ facet->borderPlanes[0] = borders[EN_TOP];
+ facet->borderNoAdjust[0] = noAdjust[EN_TOP];
+ facet->borderPlanes[1] = borders[EN_RIGHT];
+ facet->borderNoAdjust[1] = noAdjust[EN_RIGHT];
+ facet->borderPlanes[2] = borders[EN_BOTTOM];
+ facet->borderNoAdjust[2] = noAdjust[EN_BOTTOM];
+ facet->borderPlanes[3] = borders[EN_LEFT];
+ facet->borderNoAdjust[3] = noAdjust[EN_LEFT];
+ CM_SetBorderInward( facet, grid, gridPlanes, i, j, -1 );
+ if ( CM_ValidateFacet( facet ) ) {
+ CM_AddFacetBevels( facet );
+ numFacets++;
+ }
+ } else {
+ // two seperate triangles
+ facet->surfacePlane = gridPlanes[i][j][0];
+ facet->numBorders = 3;
+ facet->borderPlanes[0] = borders[EN_TOP];
+ facet->borderNoAdjust[0] = noAdjust[EN_TOP];
+ facet->borderPlanes[1] = borders[EN_RIGHT];
+ facet->borderNoAdjust[1] = noAdjust[EN_RIGHT];
+ facet->borderPlanes[2] = gridPlanes[i][j][1];
+ if ( facet->borderPlanes[2] == -1 ) {
+ facet->borderPlanes[2] = borders[EN_BOTTOM];
+ if ( facet->borderPlanes[2] == -1 ) {
+ facet->borderPlanes[2] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 4 );
+ }
+ }
+ CM_SetBorderInward( facet, grid, gridPlanes, i, j, 0 );
+ if ( CM_ValidateFacet( facet ) ) {
+ CM_AddFacetBevels( facet );
+ numFacets++;
+ }
+
+ if ( numFacets == MAX_FACETS ) {
+ Com_Error( ERR_DROP, "MAX_FACETS" );
+ }
+ facet = &facets[numFacets];
+ Com_Memset( facet, 0, sizeof( *facet ) );
+
+ facet->surfacePlane = gridPlanes[i][j][1];
+ facet->numBorders = 3;
+ facet->borderPlanes[0] = borders[EN_BOTTOM];
+ facet->borderNoAdjust[0] = noAdjust[EN_BOTTOM];
+ facet->borderPlanes[1] = borders[EN_LEFT];
+ facet->borderNoAdjust[1] = noAdjust[EN_LEFT];
+ facet->borderPlanes[2] = gridPlanes[i][j][0];
+ if ( facet->borderPlanes[2] == -1 ) {
+ facet->borderPlanes[2] = borders[EN_TOP];
+ if ( facet->borderPlanes[2] == -1 ) {
+ facet->borderPlanes[2] = CM_EdgePlaneNum( grid, gridPlanes, i, j, 5 );
+ }
+ }
+ CM_SetBorderInward( facet, grid, gridPlanes, i, j, 1 );
+ if ( CM_ValidateFacet( facet ) ) {
+ CM_AddFacetBevels( facet );
+ numFacets++;
+ }
+ }
+ }
+ }
+
+ // copy the results out
+ pf->numPlanes = numPlanes;
+ pf->numFacets = numFacets;
+ pf->facets = Hunk_Alloc( numFacets * sizeof( *pf->facets ), h_high );
+ Com_Memcpy( pf->facets, facets, numFacets * sizeof( *pf->facets ) );
+ pf->planes = Hunk_Alloc( numPlanes * sizeof( *pf->planes ), h_high );
+ Com_Memcpy( pf->planes, planes, numPlanes * sizeof( *pf->planes ) );
+}
+
+
+/*
+===================
+CM_GeneratePatchCollide
+
+Creates an internal structure that will be used to perform
+collision detection with a patch mesh.
+
+Points is packed as concatenated rows.
+===================
+*/
+struct patchCollide_s *CM_GeneratePatchCollide( int width, int height, vec3_t *points ) {
+ patchCollide_t *pf;
+ cGrid_t grid;
+ int i, j;
+
+ if ( width <= 2 || height <= 2 || !points ) {
+ Com_Error( ERR_DROP, "CM_GeneratePatchFacets: bad parameters: (%i, %i, %p)",
+ width, height, points );
+ }
+
+ if ( !(width & 1) || !(height & 1) ) {
+ Com_Error( ERR_DROP, "CM_GeneratePatchFacets: even sizes are invalid for quadratic meshes" );
+ }
+
+ if ( width > MAX_GRID_SIZE || height > MAX_GRID_SIZE ) {
+ Com_Error( ERR_DROP, "CM_GeneratePatchFacets: source is > MAX_GRID_SIZE" );
+ }
+
+ // build a grid
+ grid.width = width;
+ grid.height = height;
+ grid.wrapWidth = qfalse;
+ grid.wrapHeight = qfalse;
+ for ( i = 0 ; i < width ; i++ ) {
+ for ( j = 0 ; j < height ; j++ ) {
+ VectorCopy( points[j*width + i], grid.points[i][j] );
+ }
+ }
+
+ // subdivide the grid
+ CM_SetGridWrapWidth( &grid );
+ CM_SubdivideGridColumns( &grid );
+ CM_RemoveDegenerateColumns( &grid );
+
+ CM_TransposeGrid( &grid );
+
+ CM_SetGridWrapWidth( &grid );
+ CM_SubdivideGridColumns( &grid );
+ CM_RemoveDegenerateColumns( &grid );
+
+ // we now have a grid of points exactly on the curve
+ // the aproximate surface defined by these points will be
+ // collided against
+ pf = Hunk_Alloc( sizeof( *pf ), h_high );
+ ClearBounds( pf->bounds[0], pf->bounds[1] );
+ for ( i = 0 ; i < grid.width ; i++ ) {
+ for ( j = 0 ; j < grid.height ; j++ ) {
+ AddPointToBounds( grid.points[i][j], pf->bounds[0], pf->bounds[1] );
+ }
+ }
+
+ c_totalPatchBlocks += ( grid.width - 1 ) * ( grid.height - 1 );
+
+ // generate a bsp tree for the surface
+ CM_PatchCollideFromGrid( &grid, pf );
+
+ // expand by one unit for epsilon purposes
+ pf->bounds[0][0] -= 1;
+ pf->bounds[0][1] -= 1;
+ pf->bounds[0][2] -= 1;
+
+ pf->bounds[1][0] += 1;
+ pf->bounds[1][1] += 1;
+ pf->bounds[1][2] += 1;
+
+ return pf;
+}
+
+/*
+================================================================================
+
+TRACE TESTING
+
+================================================================================
+*/
+
+/*
+====================
+CM_TracePointThroughPatchCollide
+
+ special case for point traces because the patch collide "brushes" have no volume
+====================
+*/
+void CM_TracePointThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
+ qboolean frontFacing[MAX_PATCH_PLANES];
+ float intersection[MAX_PATCH_PLANES];
+ float intersect;
+ const patchPlane_t *planes;
+ const facet_t *facet;
+ int i, j, k;
+ float offset;
+ float d1, d2;
+#ifndef BSPC
+ static cvar_t *cv;
+#endif //BSPC
+
+#ifndef BSPC
+ if ( !cm_playerCurveClip->integer || !tw->isPoint ) {
+ return;
+ }
+#endif
+
+ // determine the trace's relationship to all planes
+ planes = pc->planes;
+ for ( i = 0 ; i < pc->numPlanes ; i++, planes++ ) {
+ offset = DotProduct( tw->offsets[ planes->signbits ], planes->plane );
+ d1 = DotProduct( tw->start, planes->plane ) - planes->plane[3] + offset;
+ d2 = DotProduct( tw->end, planes->plane ) - planes->plane[3] + offset;
+ if ( d1 <= 0 ) {
+ frontFacing[i] = qfalse;
+ } else {
+ frontFacing[i] = qtrue;
+ }
+ if ( d1 == d2 ) {
+ intersection[i] = 99999;
+ } else {
+ intersection[i] = d1 / ( d1 - d2 );
+ if ( intersection[i] <= 0 ) {
+ intersection[i] = 99999;
+ }
+ }
+ }
+
+
+ // see if any of the surface planes are intersected
+ facet = pc->facets;
+ for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
+ if ( !frontFacing[facet->surfacePlane] ) {
+ continue;
+ }
+ intersect = intersection[facet->surfacePlane];
+ if ( intersect < 0 ) {
+ continue; // surface is behind the starting point
+ }
+ if ( intersect > tw->trace.fraction ) {
+ continue; // already hit something closer
+ }
+ for ( j = 0 ; j < facet->numBorders ; j++ ) {
+ k = facet->borderPlanes[j];
+ if ( frontFacing[k] ^ facet->borderInward[j] ) {
+ if ( intersection[k] > intersect ) {
+ break;
+ }
+ } else {
+ if ( intersection[k] < intersect ) {
+ break;
+ }
+ }
+ }
+ if ( j == facet->numBorders ) {
+ // we hit this facet
+#ifndef BSPC
+ if (!cv) {
+ cv = Cvar_Get( "r_debugSurfaceUpdate", "1", 0 );
+ }
+ if (cv->integer) {
+ debugPatchCollide = pc;
+ debugFacet = facet;
+ }
+#endif //BSPC
+ planes = &pc->planes[facet->surfacePlane];
+
+ // calculate intersection with a slight pushoff
+ offset = DotProduct( tw->offsets[ planes->signbits ], planes->plane );
+ d1 = DotProduct( tw->start, planes->plane ) - planes->plane[3] + offset;
+ d2 = DotProduct( tw->end, planes->plane ) - planes->plane[3] + offset;
+ tw->trace.fraction = ( d1 - SURFACE_CLIP_EPSILON ) / ( d1 - d2 );
+
+ if ( tw->trace.fraction < 0 ) {
+ tw->trace.fraction = 0;
+ }
+
+ VectorCopy( planes->plane, tw->trace.plane.normal );
+ tw->trace.plane.dist = planes->plane[3];
+ }
+ }
+}
+
+/*
+====================
+CM_CheckFacetPlane
+====================
+*/
+int CM_CheckFacetPlane(float *plane, vec3_t start, vec3_t end, float *enterFrac, float *leaveFrac, int *hit) {
+ float d1, d2, f;
+
+ *hit = qfalse;
+
+ d1 = DotProduct( start, plane ) - plane[3];
+ d2 = DotProduct( end, plane ) - plane[3];
+
+ // if completely in front of face, no intersection with the entire facet
+ if (d1 > 0 && ( d2 >= SURFACE_CLIP_EPSILON || d2 >= d1 ) ) {
+ return qfalse;
+ }
+
+ // if it doesn't cross the plane, the plane isn't relevent
+ if (d1 <= 0 && d2 <= 0 ) {
+ return qtrue;
+ }
+
+ // crosses face
+ if (d1 > d2) { // enter
+ f = (d1-SURFACE_CLIP_EPSILON) / (d1-d2);
+ if ( f < 0 ) {
+ f = 0;
+ }
+ //always favor previous plane hits and thus also the surface plane hit
+ if (f > *enterFrac) {
+ *enterFrac = f;
+ *hit = qtrue;
+ }
+ } else { // leave
+ f = (d1+SURFACE_CLIP_EPSILON) / (d1-d2);
+ if ( f > 1 ) {
+ f = 1;
+ }
+ if (f < *leaveFrac) {
+ *leaveFrac = f;
+ }
+ }
+ return qtrue;
+}
+
+/*
+====================
+CM_TraceThroughPatchCollide
+====================
+*/
+void CM_TraceThroughPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
+ int i, j, hit, hitnum;
+ float offset, enterFrac, leaveFrac, t;
+ patchPlane_t *planes;
+ facet_t *facet;
+ float plane[4] = {0, 0, 0, 0}, bestplane[4] = {0, 0, 0, 0};
+ vec3_t startp, endp;
+#ifndef BSPC
+ static cvar_t *cv;
+#endif //BSPC
+
+ if (tw->isPoint) {
+ CM_TracePointThroughPatchCollide( tw, pc );
+ return;
+ }
+
+ facet = pc->facets;
+ for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
+ enterFrac = -1.0;
+ leaveFrac = 1.0;
+ hitnum = -1;
+ //
+ planes = &pc->planes[ facet->surfacePlane ];
+ VectorCopy(planes->plane, plane);
+ plane[3] = planes->plane[3];
+ if ( tw->type == TT_CAPSULE ) {
+ // adjust the plane distance apropriately for radius
+ plane[3] += tw->sphere.radius;
+
+ // find the closest point on the capsule to the plane
+ t = DotProduct( plane, tw->sphere.offset );
+ if ( t > 0.0f ) {
+ VectorSubtract( tw->start, tw->sphere.offset, startp );
+ VectorSubtract( tw->end, tw->sphere.offset, endp );
+ }
+ else {
+ VectorAdd( tw->start, tw->sphere.offset, startp );
+ VectorAdd( tw->end, tw->sphere.offset, endp );
+ }
+ }
+ else {
+ offset = DotProduct( tw->offsets[ planes->signbits ], plane);
+ plane[3] -= offset;
+ VectorCopy( tw->start, startp );
+ VectorCopy( tw->end, endp );
+ }
+
+ if (!CM_CheckFacetPlane(plane, startp, endp, &enterFrac, &leaveFrac, &hit)) {
+ continue;
+ }
+ if (hit) {
+ Vector4Copy(plane, bestplane);
+ }
+
+ for ( j = 0; j < facet->numBorders; j++ ) {
+ planes = &pc->planes[ facet->borderPlanes[j] ];
+ if (facet->borderInward[j]) {
+ VectorNegate(planes->plane, plane);
+ plane[3] = -planes->plane[3];
+ }
+ else {
+ VectorCopy(planes->plane, plane);
+ plane[3] = planes->plane[3];
+ }
+ if ( tw->type == TT_CAPSULE ) {
+ // adjust the plane distance apropriately for radius
+ plane[3] += tw->sphere.radius;
+
+ // find the closest point on the capsule to the plane
+ t = DotProduct( plane, tw->sphere.offset );
+ if ( t > 0.0f ) {
+ VectorSubtract( tw->start, tw->sphere.offset, startp );
+ VectorSubtract( tw->end, tw->sphere.offset, endp );
+ }
+ else {
+ VectorAdd( tw->start, tw->sphere.offset, startp );
+ VectorAdd( tw->end, tw->sphere.offset, endp );
+ }
+ }
+ else {
+ // NOTE: this works even though the plane might be flipped because the bbox is centered
+ offset = DotProduct( tw->offsets[ planes->signbits ], plane);
+ plane[3] += fabs(offset);
+ VectorCopy( tw->start, startp );
+ VectorCopy( tw->end, endp );
+ }
+
+ if (!CM_CheckFacetPlane(plane, startp, endp, &enterFrac, &leaveFrac, &hit)) {
+ break;
+ }
+ if (hit) {
+ hitnum = j;
+ Vector4Copy(plane, bestplane);
+ }
+ }
+ if (j < facet->numBorders) continue;
+ //never clip against the back side
+ if (hitnum == facet->numBorders - 1) continue;
+
+ if (enterFrac < leaveFrac && enterFrac >= 0) {
+ if (enterFrac < tw->trace.fraction) {
+ if (enterFrac < 0) {
+ enterFrac = 0;
+ }
+#ifndef BSPC
+ if (!cv) {
+ cv = Cvar_Get( "r_debugSurfaceUpdate", "1", 0 );
+ }
+ if (cv && cv->integer) {
+ debugPatchCollide = pc;
+ debugFacet = facet;
+ }
+#endif //BSPC
+
+ tw->trace.fraction = enterFrac;
+ VectorCopy( bestplane, tw->trace.plane.normal );
+ tw->trace.plane.dist = bestplane[3];
+ }
+ }
+ }
+}
+
+
+/*
+=======================================================================
+
+POSITION TEST
+
+=======================================================================
+*/
+
+/*
+====================
+CM_PositionTestInPatchCollide
+====================
+*/
+qboolean CM_PositionTestInPatchCollide( traceWork_t *tw, const struct patchCollide_s *pc ) {
+ int i, j;
+ float offset, t;
+ patchPlane_t *planes;
+ facet_t *facet;
+ float plane[4];
+ vec3_t startp;
+
+ if (tw->isPoint) {
+ return qfalse;
+ }
+ //
+ facet = pc->facets;
+ for ( i = 0 ; i < pc->numFacets ; i++, facet++ ) {
+ planes = &pc->planes[ facet->surfacePlane ];
+ VectorCopy(planes->plane, plane);
+ plane[3] = planes->plane[3];
+ if ( tw->type == TT_CAPSULE ) {
+ // adjust the plane distance apropriately for radius
+ plane[3] += tw->sphere.radius;
+
+ // find the closest point on the capsule to the plane
+ t = DotProduct( plane, tw->sphere.offset );
+ if ( t > 0 ) {
+ VectorSubtract( tw->start, tw->sphere.offset, startp );
+ }
+ else {
+ VectorAdd( tw->start, tw->sphere.offset, startp );
+ }
+ }
+ else {
+ offset = DotProduct( tw->offsets[ planes->signbits ], plane);
+ plane[3] -= offset;
+ VectorCopy( tw->start, startp );
+ }
+
+ if ( DotProduct( plane, startp ) - plane[3] > 0.0f ) {
+ continue;
+ }
+
+ for ( j = 0; j < facet->numBorders; j++ ) {
+ planes = &pc->planes[ facet->borderPlanes[j] ];
+ if (facet->borderInward[j]) {
+ VectorNegate(planes->plane, plane);
+ plane[3] = -planes->plane[3];
+ }
+ else {
+ VectorCopy(planes->plane, plane);
+ plane[3] = planes->plane[3];
+ }
+ if ( tw->type == TT_CAPSULE ) {
+ // adjust the plane distance apropriately for radius
+ plane[3] += tw->sphere.radius;
+
+ // find the closest point on the capsule to the plane
+ t = DotProduct( plane, tw->sphere.offset );
+ if ( t > 0.0f ) {
+ VectorSubtract( tw->start, tw->sphere.offset, startp );
+ }
+ else {
+ VectorAdd( tw->start, tw->sphere.offset, startp );
+ }
+ }
+ else {
+ // NOTE: this works even though the plane might be flipped because the bbox is centered
+ offset = DotProduct( tw->offsets[ planes->signbits ], plane);
+ plane[3] += fabs(offset);
+ VectorCopy( tw->start, startp );
+ }
+
+ if ( DotProduct( plane, startp ) - plane[3] > 0.0f ) {
+ break;
+ }
+ }
+ if (j < facet->numBorders) {
+ continue;
+ }
+ // inside this patch facet
+ return qtrue;
+ }
+ return qfalse;
+}
+
+/*
+=======================================================================
+
+DEBUGGING
+
+=======================================================================
+*/
+
+
+/*
+==================
+CM_DrawDebugSurface
+
+Called from the renderer
+==================
+*/
+void CM_DrawDebugSurface( void (*drawPoly)(int color, int numPoints, float *points) ) {
+ static cvar_t *cv;
+#ifndef BSPC
+ static cvar_t *cv2;
+#endif
+ const patchCollide_t *pc;
+ facet_t *facet;
+ winding_t *w;
+ int i, j, k, n;
+ int curplanenum, planenum, curinward, inward;
+ float plane[4];
+ vec3_t mins = {-15, -15, -28}, maxs = {15, 15, 28};
+ //vec3_t mins = {0, 0, 0}, maxs = {0, 0, 0};
+ vec3_t v1, v2;
+
+#ifndef BSPC
+ if ( !cv2 )
+ {
+ cv2 = Cvar_Get( "r_debugSurface", "0", 0 );
+ }
+
+ if (cv2->integer != 1)
+ {
+ return;
+ }
+#endif
+
+ if ( !debugPatchCollide ) {
+ return;
+ }
+
+#ifndef BSPC
+ if ( !cv ) {
+ cv = Cvar_Get( "cm_debugSize", "2", 0 );
+ }
+#endif
+ pc = debugPatchCollide;
+
+ for ( i = 0, facet = pc->facets ; i < pc->numFacets ; i++, facet++ ) {
+
+ for ( k = 0 ; k < facet->numBorders + 1; k++ ) {
+ //
+ if (k < facet->numBorders) {
+ planenum = facet->borderPlanes[k];
+ inward = facet->borderInward[k];
+ }
+ else {
+ planenum = facet->surfacePlane;
+ inward = qfalse;
+ //continue;
+ }
+
+ Vector4Copy( pc->planes[ planenum ].plane, plane );
+
+ //planenum = facet->surfacePlane;
+ if ( inward ) {
+ VectorSubtract( vec3_origin, plane, plane );
+ plane[3] = -plane[3];
+ }
+
+ plane[3] += cv->value;
+ //*
+ for (n = 0; n < 3; n++)
+ {
+ if (plane[n] > 0) v1[n] = maxs[n];
+ else v1[n] = mins[n];
+ } //end for
+ VectorNegate(plane, v2);
+ plane[3] += fabs(DotProduct(v1, v2));
+ //*/
+
+ w = BaseWindingForPlane( plane, plane[3] );
+ for ( j = 0 ; j < facet->numBorders + 1 && w; j++ ) {
+ //
+ if (j < facet->numBorders) {
+ curplanenum = facet->borderPlanes[j];
+ curinward = facet->borderInward[j];
+ }
+ else {
+ curplanenum = facet->surfacePlane;
+ curinward = qfalse;
+ //continue;
+ }
+ //
+ if (curplanenum == planenum) continue;
+
+ Vector4Copy( pc->planes[ curplanenum ].plane, plane );
+ if ( !curinward ) {
+ VectorSubtract( vec3_origin, plane, plane );
+ plane[3] = -plane[3];
+ }
+ // if ( !facet->borderNoAdjust[j] ) {
+ plane[3] -= cv->value;
+ // }
+ for (n = 0; n < 3; n++)
+ {
+ if (plane[n] > 0) v1[n] = maxs[n];
+ else v1[n] = mins[n];
+ } //end for
+ VectorNegate(plane, v2);
+ plane[3] -= fabs(DotProduct(v1, v2));
+
+ ChopWindingInPlace( &w, plane, plane[3], 0.1f );
+ }
+ if ( w ) {
+ if ( facet == debugFacet ) {
+ drawPoly( 4, w->numpoints, w->p[0] );
+ //Com_Printf("blue facet has %d border planes\n", facet->numBorders);
+ } else {
+ drawPoly( 1, w->numpoints, w->p[0] );
+ }
+ FreeWinding( w );
+ }
+ else
+ Com_Printf("winding chopped away by border planes\n");
+ }
+ }
+
+ // draw the debug block
+ {
+ vec3_t v[3];
+
+ VectorCopy( debugBlockPoints[0], v[0] );
+ VectorCopy( debugBlockPoints[1], v[1] );
+ VectorCopy( debugBlockPoints[2], v[2] );
+ drawPoly( 2, 3, v[0] );
+
+ VectorCopy( debugBlockPoints[2], v[0] );
+ VectorCopy( debugBlockPoints[3], v[1] );
+ VectorCopy( debugBlockPoints[0], v[2] );
+ drawPoly( 2, 3, v[0] );
+ }
+
+#if 0
+ vec3_t v[4];
+
+ v[0][0] = pc->bounds[1][0];
+ v[0][1] = pc->bounds[1][1];
+ v[0][2] = pc->bounds[1][2];
+
+ v[1][0] = pc->bounds[1][0];
+ v[1][1] = pc->bounds[0][1];
+ v[1][2] = pc->bounds[1][2];
+
+ v[2][0] = pc->bounds[0][0];
+ v[2][1] = pc->bounds[0][1];
+ v[2][2] = pc->bounds[1][2];
+
+ v[3][0] = pc->bounds[0][0];
+ v[3][1] = pc->bounds[1][1];
+ v[3][2] = pc->bounds[1][2];
+
+ drawPoly( 4, v[0] );
+#endif
+}
generated by cgit (git 2.34.1) at 2024-12-25 19:18:33 +0000