785 lines
19 KiB
C++
785 lines
19 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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//=============================================================================//
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#include "vbsp.h"
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/*
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tag all brushes with original contents
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brushes may contain multiple contents
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there will be no brush overlap after csg phase
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each side has a count of the other sides it splits
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the best split will be the one that minimizes the total split counts
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of all remaining sides
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precalc side on plane table
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evaluate split side
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{
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cost = 0
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for all sides
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for all sides
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get
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if side splits side and splitside is on same child
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cost++;
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}
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*/
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void SplitBrush2( bspbrush_t *brush, int planenum, bspbrush_t **front, bspbrush_t **back )
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{
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SplitBrush( brush, planenum, front, back );
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#if 0
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if (*front && (*front)->sides[(*front)->numsides-1].texinfo == -1)
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(*front)->sides[(*front)->numsides-1].texinfo = (*front)->sides[0].texinfo; // not -1
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if (*back && (*back)->sides[(*back)->numsides-1].texinfo == -1)
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(*back)->sides[(*back)->numsides-1].texinfo = (*back)->sides[0].texinfo; // not -1
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#endif
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}
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/*
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===============
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SubtractBrush
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Returns a list of brushes that remain after B is subtracted from A.
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May by empty if A is contained inside B.
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The originals are undisturbed.
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===============
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*/
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bspbrush_t *SubtractBrush (bspbrush_t *a, bspbrush_t *b)
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{ // a - b = out (list)
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int i;
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bspbrush_t *front, *back;
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bspbrush_t *out, *in;
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in = a;
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out = NULL;
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for (i=0 ; i<b->numsides && in ; i++)
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{
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SplitBrush2 (in, b->sides[i].planenum, &front, &back);
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if (in != a)
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FreeBrush (in);
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if (front)
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{ // add to list
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front->next = out;
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out = front;
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}
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in = back;
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}
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if (in)
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FreeBrush (in);
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else
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{ // didn't really intersect
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FreeBrushList (out);
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return a;
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}
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return out;
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}
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/*
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===============
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IntersectBrush
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Returns a single brush made up by the intersection of the
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two provided brushes, or NULL if they are disjoint.
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The originals are undisturbed.
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===============
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*/
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bspbrush_t *IntersectBrush (bspbrush_t *a, bspbrush_t *b)
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{
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int i;
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bspbrush_t *front, *back;
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bspbrush_t *in;
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in = a;
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for (i=0 ; i<b->numsides && in ; i++)
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{
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SplitBrush2 (in, b->sides[i].planenum, &front, &back);
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if (in != a)
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FreeBrush (in);
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if (front)
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FreeBrush (front);
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in = back;
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}
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if (in == a || !in)
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return NULL;
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in->next = NULL;
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return in;
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}
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/*
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===============
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BrushesDisjoint
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Returns true if the two brushes definately do not intersect.
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There will be false negatives for some non-axial combinations.
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===============
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*/
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qboolean BrushesDisjoint (bspbrush_t *a, bspbrush_t *b)
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{
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int i, j;
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// check bounding boxes
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for (i=0 ; i<3 ; i++)
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if (a->mins[i] >= b->maxs[i]
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|| a->maxs[i] <= b->mins[i])
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return true; // bounding boxes don't overlap
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// check for opposing planes
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for (i=0 ; i<a->numsides ; i++)
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{
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for (j=0 ; j<b->numsides ; j++)
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{
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if (a->sides[i].planenum ==
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(b->sides[j].planenum^1) )
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return true; // opposite planes, so not touching
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}
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}
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return false; // might intersect
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}
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int minplanenums[3];
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int maxplanenums[3];
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/*
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===============
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ClipBrushToBox
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Any planes shared with the box edge will be set to no texinfo
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===============
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*/
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bspbrush_t *ClipBrushToBox (bspbrush_t *brush, const Vector& clipmins, const Vector& clipmaxs)
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{
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int i, j;
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bspbrush_t *front, *back;
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int p;
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for (j=0 ; j<2 ; j++)
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{
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if (brush->maxs[j] > clipmaxs[j])
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{
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SplitBrush (brush, maxplanenums[j], &front, &back);
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if (front)
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FreeBrush (front);
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brush = back;
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if (!brush)
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return NULL;
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}
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if (brush->mins[j] < clipmins[j])
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{
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SplitBrush (brush, minplanenums[j], &front, &back);
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if (back)
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FreeBrush (back);
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brush = front;
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if (!brush)
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return NULL;
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}
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}
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// remove any colinear faces
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for (i=0 ; i<brush->numsides ; i++)
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{
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p = brush->sides[i].planenum & ~1;
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if (p == maxplanenums[0] || p == maxplanenums[1]
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|| p == minplanenums[0] || p == minplanenums[1])
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{
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brush->sides[i].texinfo = TEXINFO_NODE;
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brush->sides[i].visible = false;
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}
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}
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return brush;
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}
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//-----------------------------------------------------------------------------
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// Creates a clipped brush from a map brush
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//-----------------------------------------------------------------------------
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static bspbrush_t *CreateClippedBrush( mapbrush_t *mb, const Vector& clipmins, const Vector& clipmaxs )
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{
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int nNumSides = mb->numsides;
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if (!nNumSides)
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return NULL;
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// if the brush is outside the clip area, skip it
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for (int j=0 ; j<3 ; j++)
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{
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if (mb->mins[j] >= clipmaxs[j] || mb->maxs[j] <= clipmins[j])
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{
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return NULL;
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}
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}
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// make a copy of the brush
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bspbrush_t *newbrush = AllocBrush( nNumSides );
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newbrush->original = mb;
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newbrush->numsides = nNumSides;
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memcpy (newbrush->sides, mb->original_sides, nNumSides*sizeof(side_t));
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for (int j=0 ; j<nNumSides; j++)
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{
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if (newbrush->sides[j].winding)
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{
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newbrush->sides[j].winding = CopyWinding (newbrush->sides[j].winding);
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}
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if (newbrush->sides[j].surf & SURF_HINT)
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{
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newbrush->sides[j].visible = true; // hints are always visible
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}
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// keep a pointer to the original map brush side -- use to create the original face later!!
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//newbrush->sides[j].original = &mb->original_sides[j];
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}
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VectorCopy (mb->mins, newbrush->mins);
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VectorCopy (mb->maxs, newbrush->maxs);
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// carve off anything outside the clip box
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newbrush = ClipBrushToBox (newbrush, clipmins, clipmaxs);
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return newbrush;
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}
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//-----------------------------------------------------------------------------
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// Creates a clipped brush from a map brush
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//-----------------------------------------------------------------------------
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static void ComputeBoundingPlanes( const Vector& clipmins, const Vector& clipmaxs )
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{
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Vector normal;
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float dist;
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for (int i=0 ; i<2 ; i++)
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{
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VectorClear (normal);
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normal[i] = 1;
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dist = clipmaxs[i];
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maxplanenums[i] = g_MainMap->FindFloatPlane (normal, dist);
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dist = clipmins[i];
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minplanenums[i] = g_MainMap->FindFloatPlane (normal, dist);
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}
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}
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//-----------------------------------------------------------------------------
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// This forces copies of texinfo data for matching sides of a brush
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//-----------------------------------------------------------------------------
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void CopyMatchingTexinfos( side_t *pDestSides, int numDestSides, const bspbrush_t *pSource )
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{
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for ( int i = 0; i < numDestSides; i++ )
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{
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side_t *pSide = &pDestSides[i];
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plane_t *pPlane = &g_MainMap->mapplanes[pSide->planenum];
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// We have to use the *original sides* because MapBSPBrushList could have generated
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// splits when cutting the original brush to the block being processed. This
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// will generate faces that use TEXINFO_NODE, which is definitely *not* what we want.
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// If we end up with faces using TEXINFO_NODE here, the area portal will flood into
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// the entire water volume intersecting the areaportal.
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mapbrush_t *pSourceBrush = pSource->original;
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Assert( pSourceBrush );
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const side_t *pSourceSide = pSourceBrush->original_sides;
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const side_t *pBestSide = NULL;
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float flBestDot = -1.0f;
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for ( int j = 0; j < pSourceBrush->numsides; ++j, ++pSourceSide )
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{
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if ( pSourceSide->texinfo == TEXINFO_NODE )
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continue;
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plane_t *pSourcePlane = &g_MainMap->mapplanes[pSourceSide->planenum];
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float flDot = DotProduct( pPlane->normal, pSourcePlane->normal );
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if ( flDot == 1.0f || pSide->planenum == pSourceSide->planenum )
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{
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pBestSide = pSourceSide;
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break;
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}
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else if ( flDot > flBestDot )
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{
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pBestSide = pSourceSide;
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flBestDot = flDot;
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}
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}
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if ( pBestSide )
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{
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pSide->texinfo = pBestSide->texinfo;
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if ( pSide->original )
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{
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pSide->original->texinfo = pSide->texinfo;
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}
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}
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else
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{
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texinfo_t *pTexInfo = &texinfo[pSide->texinfo];
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dtexdata_t *pTexData = GetTexData( pTexInfo->texdata );
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Msg("Found no matching plane for %s\n", TexDataStringTable_GetString( pTexData->nameStringTableID ) );
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}
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}
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}
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// This is a hack to allow areaportals to work in water
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// It was done this way for ease of implementation.
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// This searches a brush list to find intersecting areaportals and water
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// If an areaportal is found inside water, then the water contents and
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// texture information is copied over to the areaportal so that the
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// resulting space has the same properties as the water (normal areaportals assume "empty" surroundings)
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void FixupAreaportalWaterBrushes( bspbrush_t *pList )
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{
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for ( bspbrush_t *pAreaportal = pList; pAreaportal; pAreaportal = pAreaportal->next )
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{
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if ( !(pAreaportal->original->contents & CONTENTS_AREAPORTAL) )
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continue;
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for ( bspbrush_t *pWater = pList; pWater; pWater = pWater->next )
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{
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// avoid using areaportal/water combo brushes that have already been fixed up
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if ( pWater->original->contents & CONTENTS_AREAPORTAL )
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continue;
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if ( !(pWater->original->contents & MASK_SPLITAREAPORTAL) )
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continue;
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if ( BrushesDisjoint( pAreaportal, pWater ) )
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continue;
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bspbrush_t *pIntersect = IntersectBrush( pAreaportal, pWater );
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if ( !pIntersect )
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continue;
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FreeBrush( pIntersect );
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pAreaportal->original->contents |= pWater->original->contents;
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// HACKHACK: Ideally, this should have been done before the bspbrush_t was
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// created from the map brush. But since it hasn't been, retexture the original map
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// brush's sides
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CopyMatchingTexinfos( pAreaportal->sides, pAreaportal->numsides, pWater );
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CopyMatchingTexinfos( pAreaportal->original->original_sides, pAreaportal->original->numsides, pWater );
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}
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}
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}
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//-----------------------------------------------------------------------------
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// MakeBspBrushList
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//-----------------------------------------------------------------------------
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// UNDONE: Put detail brushes in a separate brush array and pass that instead of "onlyDetail" ?
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bspbrush_t *MakeBspBrushList (int startbrush, int endbrush, const Vector& clipmins, const Vector& clipmaxs, int detailScreen)
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{
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ComputeBoundingPlanes( clipmins, clipmaxs );
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bspbrush_t *pBrushList = NULL;
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int i;
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for (i=startbrush ; i<endbrush ; i++)
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{
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mapbrush_t *mb = &g_MainMap->mapbrushes[i];
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if ( detailScreen != FULL_DETAIL )
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{
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bool onlyDetail = (detailScreen == ONLY_DETAIL);
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bool detail = (mb->contents & CONTENTS_DETAIL) != 0;
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if ( onlyDetail ^ detail )
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{
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// both of these must have the same value or we're not interested in this brush
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continue;
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}
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}
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bspbrush_t *pNewBrush = CreateClippedBrush( mb, clipmins, clipmaxs );
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if ( pNewBrush )
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{
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pNewBrush->next = pBrushList;
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pBrushList = pNewBrush;
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}
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}
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return pBrushList;
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}
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//-----------------------------------------------------------------------------
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// A version which uses a passed-in list of brushes
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//-----------------------------------------------------------------------------
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bspbrush_t *MakeBspBrushList (mapbrush_t **pBrushes, int nBrushCount, const Vector& clipmins, const Vector& clipmaxs)
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{
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ComputeBoundingPlanes( clipmins, clipmaxs );
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bspbrush_t *pBrushList = NULL;
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for ( int i=0; i < nBrushCount; ++i )
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{
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bspbrush_t *pNewBrush = CreateClippedBrush( pBrushes[i], clipmins, clipmaxs );
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if ( pNewBrush )
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{
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pNewBrush->next = pBrushList;
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pBrushList = pNewBrush;
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}
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}
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return pBrushList;
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}
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/*
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===============
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AddBspBrushListToTail
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===============
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*/
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bspbrush_t *AddBrushListToTail (bspbrush_t *list, bspbrush_t *tail)
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{
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bspbrush_t *walk, *next;
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for (walk=list ; walk ; walk=next)
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{ // add to end of list
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next = walk->next;
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walk->next = NULL;
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tail->next = walk;
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tail = walk;
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}
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return tail;
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}
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/*
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===========
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CullList
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Builds a new list that doesn't hold the given brush
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===========
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*/
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bspbrush_t *CullList (bspbrush_t *list, bspbrush_t *skip1)
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{
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bspbrush_t *newlist;
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bspbrush_t *next;
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newlist = NULL;
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for ( ; list ; list = next)
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{
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next = list->next;
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if (list == skip1)
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{
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FreeBrush (list);
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continue;
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}
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list->next = newlist;
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newlist = list;
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}
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return newlist;
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}
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/*
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==================
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WriteBrushMap
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==================
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*/
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void WriteBrushMap (char *name, bspbrush_t *list)
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{
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FILE *f;
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side_t *s;
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int i;
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winding_t *w;
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Msg("writing %s\n", name);
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f = fopen (name, "w");
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if (!f)
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Error ("Can't write %s\b", name);
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fprintf (f, "{\n\"classname\" \"worldspawn\"\n");
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for ( ; list ; list=list->next )
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{
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fprintf (f, "{\n");
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for (i=0,s=list->sides ; i<list->numsides ; i++,s++)
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{
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w = BaseWindingForPlane (g_MainMap->mapplanes[s->planenum].normal, g_MainMap->mapplanes[s->planenum].dist);
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fprintf (f,"( %i %i %i ) ", (int)w->p[0][0], (int)w->p[0][1], (int)w->p[0][2]);
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fprintf (f,"( %i %i %i ) ", (int)w->p[1][0], (int)w->p[1][1], (int)w->p[1][2]);
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fprintf (f,"( %i %i %i ) ", (int)w->p[2][0], (int)w->p[2][1], (int)w->p[2][2]);
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fprintf (f, "%s 0 0 0 1 1\n", TexDataStringTable_GetString( GetTexData( texinfo[s->texinfo].texdata )->nameStringTableID ) );
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FreeWinding (w);
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}
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fprintf (f, "}\n");
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}
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fprintf (f, "}\n");
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fclose (f);
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}
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// UNDONE: This isn't quite working yet
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#if 0
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void WriteBrushVMF(char *name, bspbrush_t *list)
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{
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FILE *f;
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side_t *s;
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int i;
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winding_t *w;
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Vector u, v;
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Msg("writing %s\n", name);
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f = fopen (name, "w");
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if (!f)
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Error ("Can't write %s\b", name);
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fprintf (f, "world\n{\n\"classname\" \"worldspawn\"\n");
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for ( ; list ; list=list->next )
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{
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fprintf (f, "\tsolid\n\t{\n");
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for (i=0,s=list->sides ; i<list->numsides ; i++,s++)
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{
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fprintf( f, "\t\tside\n\t\t{\n" );
|
|
fprintf( f, "\t\t\t\"plane\" \"" );
|
|
w = BaseWindingForPlane (mapplanes[s->planenum].normal, mapplanes[s->planenum].dist);
|
|
|
|
fprintf (f,"(%i %i %i) ", (int)w->p[0][0], (int)w->p[0][1], (int)w->p[0][2]);
|
|
fprintf (f,"(%i %i %i) ", (int)w->p[1][0], (int)w->p[1][1], (int)w->p[1][2]);
|
|
fprintf (f,"(%i %i %i)", (int)w->p[2][0], (int)w->p[2][1], (int)w->p[2][2]);
|
|
fprintf( f, "\"\n" );
|
|
fprintf( f, "\t\t\t\"material\" \"%s\"\n", GetTexData( texinfo[s->texinfo].texdata )->name );
|
|
// UNDONE: recreate correct texture axes
|
|
BasisForPlane( mapplanes[s->planenum].normal, u, v );
|
|
fprintf( f, "\t\t\t\"uaxis\" \"[%.3f %.3f %.3f 0] 1.0\"\n", u[0], u[1], u[2] );
|
|
fprintf( f, "\t\t\t\"vaxis\" \"[%.3f %.3f %.3f 0] 1.0\"\n", v[0], v[1], v[2] );
|
|
|
|
fprintf( f, "\t\t\t\"rotation\" \"0.0\"\n" );
|
|
fprintf( f, "\t\t\t\"lightmapscale\" \"16.0\"\n" );
|
|
|
|
FreeWinding (w);
|
|
fprintf (f, "\t\t}\n");
|
|
}
|
|
fprintf (f, "\t}\n");
|
|
}
|
|
fprintf (f, "}\n");
|
|
|
|
fclose (f);
|
|
|
|
}
|
|
#endif
|
|
|
|
void PrintBrushContentsToString( int contents, char *pOut, int nMaxChars )
|
|
{
|
|
#define ADD_CONTENTS( flag ) \
|
|
if ( contents & flag ) \
|
|
Q_strncat( pOut, #flag " ", nMaxChars, COPY_ALL_CHARACTERS );
|
|
|
|
pOut[0] = 0;
|
|
|
|
ADD_CONTENTS(CONTENTS_SOLID)
|
|
ADD_CONTENTS(CONTENTS_WINDOW)
|
|
ADD_CONTENTS(CONTENTS_AUX)
|
|
ADD_CONTENTS(CONTENTS_GRATE)
|
|
ADD_CONTENTS(CONTENTS_SLIME)
|
|
ADD_CONTENTS(CONTENTS_WATER)
|
|
ADD_CONTENTS(CONTENTS_BLOCKLOS)
|
|
ADD_CONTENTS(CONTENTS_OPAQUE)
|
|
ADD_CONTENTS(CONTENTS_TESTFOGVOLUME)
|
|
ADD_CONTENTS(CONTENTS_MOVEABLE)
|
|
ADD_CONTENTS(CONTENTS_AREAPORTAL)
|
|
ADD_CONTENTS(CONTENTS_PLAYERCLIP)
|
|
ADD_CONTENTS(CONTENTS_MONSTERCLIP)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_0)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_90)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_180)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_270)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_UP)
|
|
ADD_CONTENTS(CONTENTS_CURRENT_DOWN)
|
|
ADD_CONTENTS(CONTENTS_ORIGIN)
|
|
ADD_CONTENTS(CONTENTS_MONSTER)
|
|
ADD_CONTENTS(CONTENTS_DEBRIS)
|
|
ADD_CONTENTS(CONTENTS_DETAIL)
|
|
ADD_CONTENTS(CONTENTS_TRANSLUCENT)
|
|
ADD_CONTENTS(CONTENTS_LADDER)
|
|
ADD_CONTENTS(CONTENTS_HITBOX)
|
|
}
|
|
|
|
void PrintBrushContents( int contents )
|
|
{
|
|
char str[1024];
|
|
PrintBrushContentsToString( contents, str, sizeof( str ) );
|
|
Msg( "%s", str );
|
|
}
|
|
|
|
/*
|
|
==================
|
|
BrushGE
|
|
|
|
Returns true if b1 is allowed to bite b2
|
|
==================
|
|
*/
|
|
qboolean BrushGE (bspbrush_t *b1, bspbrush_t *b2)
|
|
{
|
|
// Areaportals are allowed to bite water + slime
|
|
// NOTE: This brush combo should have been fixed up
|
|
// in a first pass (FixupAreaportalWaterBrushes)
|
|
if( (b2->original->contents & MASK_SPLITAREAPORTAL) &&
|
|
(b1->original->contents & CONTENTS_AREAPORTAL) )
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// detail brushes never bite structural brushes
|
|
if ( (b1->original->contents & CONTENTS_DETAIL)
|
|
&& !(b2->original->contents & CONTENTS_DETAIL) )
|
|
return false;
|
|
if (b1->original->contents & CONTENTS_SOLID)
|
|
return true;
|
|
// Transparent brushes are not marked as detail anymore, so let them cut each other.
|
|
if ( (b1->original->contents & TRANSPARENT_CONTENTS) && (b2->original->contents & TRANSPARENT_CONTENTS) )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
ChopBrushes
|
|
|
|
Carves any intersecting solid brushes into the minimum number
|
|
of non-intersecting brushes.
|
|
=================
|
|
*/
|
|
bspbrush_t *ChopBrushes (bspbrush_t *head)
|
|
{
|
|
bspbrush_t *b1, *b2, *next;
|
|
bspbrush_t *tail;
|
|
bspbrush_t *keep;
|
|
bspbrush_t *sub, *sub2;
|
|
int c1, c2;
|
|
|
|
qprintf ("---- ChopBrushes ----\n");
|
|
qprintf ("original brushes: %i\n", CountBrushList (head));
|
|
|
|
#if DEBUG_BRUSHMODEL
|
|
if (entity_num == DEBUG_BRUSHMODEL)
|
|
WriteBrushList ("before.gl", head, false);
|
|
#endif
|
|
keep = NULL;
|
|
|
|
newlist:
|
|
// find tail
|
|
if (!head)
|
|
return NULL;
|
|
for (tail=head ; tail->next ; tail=tail->next)
|
|
;
|
|
|
|
for (b1=head ; b1 ; b1=next)
|
|
{
|
|
next = b1->next;
|
|
for (b2=b1->next ; b2 ; b2 = b2->next)
|
|
{
|
|
if (BrushesDisjoint (b1, b2))
|
|
continue;
|
|
|
|
sub = NULL;
|
|
sub2 = NULL;
|
|
c1 = 999999;
|
|
c2 = 999999;
|
|
|
|
if ( BrushGE (b2, b1) )
|
|
{
|
|
// printf( "b2 bites b1\n" );
|
|
sub = SubtractBrush (b1, b2);
|
|
if (sub == b1)
|
|
continue; // didn't really intersect
|
|
if (!sub)
|
|
{ // b1 is swallowed by b2
|
|
head = CullList (b1, b1);
|
|
goto newlist;
|
|
}
|
|
c1 = CountBrushList (sub);
|
|
}
|
|
|
|
if ( BrushGE (b1, b2) )
|
|
{
|
|
// printf( "b1 bites b2\n" );
|
|
sub2 = SubtractBrush (b2, b1);
|
|
if (sub2 == b2)
|
|
continue; // didn't really intersect
|
|
if (!sub2)
|
|
{ // b2 is swallowed by b1
|
|
FreeBrushList (sub);
|
|
head = CullList (b1, b2);
|
|
goto newlist;
|
|
}
|
|
c2 = CountBrushList (sub2);
|
|
}
|
|
|
|
if (!sub && !sub2)
|
|
continue; // neither one can bite
|
|
|
|
// only accept if it didn't fragment
|
|
// (commening this out allows full fragmentation)
|
|
if (c1 > 1 && c2 > 1)
|
|
{
|
|
const int contents1 = b1->original->contents;
|
|
const int contents2 = b2->original->contents;
|
|
// if both detail, allow fragmentation
|
|
if ( !((contents1&contents2) & CONTENTS_DETAIL) && !((contents1|contents2) & CONTENTS_AREAPORTAL) )
|
|
{
|
|
if (sub2)
|
|
FreeBrushList (sub2);
|
|
if (sub)
|
|
FreeBrushList (sub);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (c1 < c2)
|
|
{
|
|
if (sub2)
|
|
FreeBrushList (sub2);
|
|
tail = AddBrushListToTail (sub, tail);
|
|
head = CullList (b1, b1);
|
|
goto newlist;
|
|
}
|
|
else
|
|
{
|
|
if (sub)
|
|
FreeBrushList (sub);
|
|
tail = AddBrushListToTail (sub2, tail);
|
|
head = CullList (b1, b2);
|
|
goto newlist;
|
|
}
|
|
}
|
|
|
|
if (!b2)
|
|
{ // b1 is no longer intersecting anything, so keep it
|
|
b1->next = keep;
|
|
keep = b1;
|
|
}
|
|
}
|
|
|
|
qprintf ("output brushes: %i\n", CountBrushList (keep));
|
|
#if DEBUG_BRUSHMODEL
|
|
if ( entity_num == DEBUG_BRUSHMODEL )
|
|
{
|
|
WriteBrushList ("after.gl", keep, false);
|
|
WriteBrushMap ("after.map", keep);
|
|
}
|
|
#endif
|
|
return keep;
|
|
}
|
|
|
|
|