mirror of
https://github.com/FWGS/xash3d-fwgs
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964 lines
22 KiB
C
964 lines
22 KiB
C
/*
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Copyright (C) 1997-2001 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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.
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See the 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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*/
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// r_bsp.c
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#include "r_local.h"
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//
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// current entity info
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//
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vec3_t r_entorigin; // the currently rendering entity in world
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// coordinates
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float entity_rotation[3][3];
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int r_currentbkey;
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typedef enum {touchessolid, drawnode, nodrawnode} solidstate_t;
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#define MAX_BMODEL_VERTS 1000 // 12K
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#define MAX_BMODEL_EDGES 2000 // 24K
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static mvertex_t *pbverts;
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static bedge_t *pbedges;
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static int numbverts, numbedges;
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static mvertex_t *pfrontenter, *pfrontexit;
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static qboolean makeclippededge;
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/*
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================
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R_ConcatRotations
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================
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*/
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void R_ConcatRotations (float in1[3][3], float in2[3][3], float out[3][3])
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{
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out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] +
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in1[0][2] * in2[2][0];
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out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] +
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in1[0][2] * in2[2][1];
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out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] +
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in1[0][2] * in2[2][2];
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out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] +
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in1[1][2] * in2[2][0];
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out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] +
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in1[1][2] * in2[2][1];
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out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] +
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in1[1][2] * in2[2][2];
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out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] +
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in1[2][2] * in2[2][0];
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out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] +
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in1[2][2] * in2[2][1];
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out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] +
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in1[2][2] * in2[2][2];
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}
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//===========================================================================
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/*
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================
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R_EntityRotate
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================
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*/
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void R_EntityRotate (vec3_t vec)
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{
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vec3_t tvec;
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VectorCopy (vec, tvec);
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vec[0] = DotProduct (entity_rotation[0], tvec);
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vec[1] = DotProduct (entity_rotation[1], tvec);
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vec[2] = DotProduct (entity_rotation[2], tvec);
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}
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/*
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================
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R_RotateBmodel
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================
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*/
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void R_RotateBmodel (void)
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{
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float angle, s, c, temp1[3][3], temp2[3][3], temp3[3][3];
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// TODO: should use a look-up table
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// TODO: should really be stored with the entity instead of being reconstructed
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// TODO: could cache lazily, stored in the entity
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// TODO: share work with R_SetUpAliasTransform
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// yaw
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angle = RI.currententity->angles[YAW];
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angle = angle * M_PI_F * 2 / 360.0f;
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s = sin(angle);
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c = cos(angle);
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temp1[0][0] = c;
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temp1[0][1] = s;
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temp1[0][2] = 0;
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temp1[1][0] = -s;
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temp1[1][1] = c;
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temp1[1][2] = 0;
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temp1[2][0] = 0;
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temp1[2][1] = 0;
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temp1[2][2] = 1;
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// pitch
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angle = RI.currententity->angles[PITCH];
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angle = angle * M_PI_F * 2 / 360.0f;
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s = sin(angle);
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c = cos(angle);
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temp2[0][0] = c;
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temp2[0][1] = 0;
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temp2[0][2] = -s;
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temp2[1][0] = 0;
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temp2[1][1] = 1;
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temp2[1][2] = 0;
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temp2[2][0] = s;
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temp2[2][1] = 0;
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temp2[2][2] = c;
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R_ConcatRotations (temp2, temp1, temp3);
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// roll
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angle = RI.currententity->angles[ROLL];
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angle = angle * M_PI_F*2 / 360.0f;
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s = sin(angle);
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c = cos(angle);
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temp1[0][0] = 1;
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temp1[0][1] = 0;
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temp1[0][2] = 0;
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temp1[1][0] = 0;
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temp1[1][1] = c;
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temp1[1][2] = s;
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temp1[2][0] = 0;
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temp1[2][1] = -s;
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temp1[2][2] = c;
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R_ConcatRotations (temp1, temp3, entity_rotation);
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//
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// rotate modelorg and the transformation matrix
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//
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R_EntityRotate (tr.modelorg);
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R_EntityRotate (RI.vforward);
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R_EntityRotate (RI.vright);
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R_EntityRotate (RI.vup);
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R_TransformFrustum ();
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}
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#if 0
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/*
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================
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R_RecursiveClipBPoly
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Clip a bmodel poly down the world bsp tree
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================
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*/
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void R_RecursiveClipBPoly (bedge_t *pedges, mnode_t *pnode, msurface_t *psurf)
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{
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bedge_t *psideedges[2], *pnextedge, *ptedge;
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int i, side, lastside;
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float dist, frac, lastdist;
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mplane_t *splitplane, tplane;
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mvertex_t *pvert, *plastvert, *ptvert;
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mnode_t *pn;
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int area;
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psideedges[0] = psideedges[1] = NULL;
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makeclippededge = false;
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// transform the BSP plane into model space
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// FIXME: cache these?
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splitplane = pnode->plane;
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tplane.dist = splitplane->dist -
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DotProduct(r_entorigin, splitplane->normal);
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tplane.normal[0] = DotProduct (entity_rotation[0], splitplane->normal);
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tplane.normal[1] = DotProduct (entity_rotation[1], splitplane->normal);
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tplane.normal[2] = DotProduct (entity_rotation[2], splitplane->normal);
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// clip edges to BSP plane
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for ( ; pedges ; pedges = pnextedge)
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{
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pnextedge = pedges->pnext;
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// set the status for the last point as the previous point
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// FIXME: cache this stuff somehow?
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plastvert = pedges->v[0];
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lastdist = DotProduct (plastvert->position, tplane.normal) -
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tplane.dist;
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if (lastdist > 0)
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lastside = 0;
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else
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lastside = 1;
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pvert = pedges->v[1];
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dist = DotProduct (pvert->position, tplane.normal) - tplane.dist;
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if (dist > 0)
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side = 0;
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else
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side = 1;
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if (side != lastside)
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{
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// clipped
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if (numbverts >= MAX_BMODEL_VERTS)
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return;
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// generate the clipped vertex
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frac = lastdist / (lastdist - dist);
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ptvert = &pbverts[numbverts++];
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ptvert->position[0] = plastvert->position[0] +
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frac * (pvert->position[0] -
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plastvert->position[0]);
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ptvert->position[1] = plastvert->position[1] +
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frac * (pvert->position[1] -
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plastvert->position[1]);
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ptvert->position[2] = plastvert->position[2] +
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frac * (pvert->position[2] -
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plastvert->position[2]);
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// split into two edges, one on each side, and remember entering
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// and exiting points
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// FIXME: share the clip edge by having a winding direction flag?
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if (numbedges >= (MAX_BMODEL_EDGES - 1))
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{
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gEngfuncs.Con_Printf ("Out of edges for bmodel\n");
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return;
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}
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ptedge = &pbedges[numbedges];
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ptedge->pnext = psideedges[lastside];
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psideedges[lastside] = ptedge;
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ptedge->v[0] = plastvert;
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ptedge->v[1] = ptvert;
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ptedge = &pbedges[numbedges + 1];
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ptedge->pnext = psideedges[side];
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psideedges[side] = ptedge;
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ptedge->v[0] = ptvert;
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ptedge->v[1] = pvert;
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numbedges += 2;
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if (side == 0)
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{
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// entering for front, exiting for back
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pfrontenter = ptvert;
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makeclippededge = true;
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}
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else
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{
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pfrontexit = ptvert;
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makeclippededge = true;
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}
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}
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else
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{
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// add the edge to the appropriate side
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pedges->pnext = psideedges[side];
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psideedges[side] = pedges;
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}
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}
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// if anything was clipped, reconstitute and add the edges along the clip
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// plane to both sides (but in opposite directions)
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if (makeclippededge)
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{
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if (numbedges >= (MAX_BMODEL_EDGES - 2))
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{
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gEngfuncs.Con_Printf ("Out of edges for bmodel\n");
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return;
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}
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ptedge = &pbedges[numbedges];
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ptedge->pnext = psideedges[0];
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psideedges[0] = ptedge;
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ptedge->v[0] = pfrontexit;
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ptedge->v[1] = pfrontenter;
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ptedge = &pbedges[numbedges + 1];
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ptedge->pnext = psideedges[1];
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psideedges[1] = ptedge;
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ptedge->v[0] = pfrontenter;
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ptedge->v[1] = pfrontexit;
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numbedges += 2;
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}
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// draw or recurse further
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for (i=0 ; i<2 ; i++)
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{
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if (psideedges[i])
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{
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// draw if we've reached a non-solid leaf, done if all that's left is a
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// solid leaf, and continue down the tree if it's not a leaf
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pn = pnode->children[i];
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// we're done with this branch if the node or leaf isn't in the PVS
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if (pn->visframe == r_visframecount)
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{
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if (pn->contents < 0)
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{
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if (pn->contents != CONTENTS_SOLID)
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{
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r_currentbkey = ((mleaf_t *)pn)->cluster;
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R_RenderBmodelFace (psideedges[i], psurf);
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}
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}
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else
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{
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R_RecursiveClipBPoly (psideedges[i], pnode->children[i],
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psurf);
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}
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}
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}
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}
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}
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#else
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/*
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================
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R_RecursiveClipBPoly
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================
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*/
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void R_RecursiveClipBPoly (bedge_t *pedges, mnode_t *pnode, msurface_t *psurf)
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{
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bedge_t *psideedges[2], *pnextedge, *ptedge;
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int i, side, lastside;
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float dist, frac, lastdist;
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mplane_t *splitplane, tplane;
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mvertex_t *pvert, *plastvert, *ptvert;
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mnode_t *pn;
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psideedges[0] = psideedges[1] = NULL;
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makeclippededge = false;
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// transform the BSP plane into model space
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// FIXME: cache these?
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splitplane = pnode->plane;
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tplane.dist = splitplane->dist -
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DotProduct(r_entorigin, splitplane->normal);
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tplane.normal[0] = DotProduct (entity_rotation[0], splitplane->normal);
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tplane.normal[1] = DotProduct (entity_rotation[1], splitplane->normal);
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tplane.normal[2] = DotProduct (entity_rotation[2], splitplane->normal);
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// clip edges to BSP plane
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for ( ; pedges ; pedges = pnextedge)
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{
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pnextedge = pedges->pnext;
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// set the status for the last point as the previous point
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// FIXME: cache this stuff somehow?
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plastvert = pedges->v[0];
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lastdist = DotProduct (plastvert->position, tplane.normal) -
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tplane.dist;
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if (lastdist > 0)
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lastside = 0;
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else
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lastside = 1;
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pvert = pedges->v[1];
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dist = DotProduct (pvert->position, tplane.normal) - tplane.dist;
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if (dist > 0)
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side = 0;
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else
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side = 1;
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if (side != lastside)
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{
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// clipped
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if (numbverts >= MAX_BMODEL_VERTS)
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return;
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// generate the clipped vertex
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frac = lastdist / (lastdist - dist);
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ptvert = &pbverts[numbverts++];
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ptvert->position[0] = plastvert->position[0] +
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frac * (pvert->position[0] -
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plastvert->position[0]);
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ptvert->position[1] = plastvert->position[1] +
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frac * (pvert->position[1] -
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plastvert->position[1]);
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ptvert->position[2] = plastvert->position[2] +
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frac * (pvert->position[2] -
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plastvert->position[2]);
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// split into two edges, one on each side, and remember entering
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// and exiting points
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// FIXME: share the clip edge by having a winding direction flag?
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if (numbedges >= (MAX_BMODEL_EDGES - 1))
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{
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//gEngfuncs.Con_Printf ("Out of edges for bmodel\n");
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return;
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}
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ptedge = &pbedges[numbedges];
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ptedge->pnext = psideedges[lastside];
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psideedges[lastside] = ptedge;
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ptedge->v[0] = plastvert;
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ptedge->v[1] = ptvert;
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ptedge = &pbedges[numbedges + 1];
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ptedge->pnext = psideedges[side];
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psideedges[side] = ptedge;
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ptedge->v[0] = ptvert;
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ptedge->v[1] = pvert;
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numbedges += 2;
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if (side == 0)
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{
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// entering for front, exiting for back
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pfrontenter = ptvert;
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makeclippededge = true;
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}
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else
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{
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pfrontexit = ptvert;
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makeclippededge = true;
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}
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}
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else
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{
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// add the edge to the appropriate side
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pedges->pnext = psideedges[side];
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psideedges[side] = pedges;
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}
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}
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// if anything was clipped, reconstitute and add the edges along the clip
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// plane to both sides (but in opposite directions)
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if (makeclippededge)
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{
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if (numbedges >= (MAX_BMODEL_EDGES - 2))
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{
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//gEngfuncs.Con_Printf ("Out of edges for bmodel\n");
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return;
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}
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ptedge = &pbedges[numbedges];
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ptedge->pnext = psideedges[0];
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psideedges[0] = ptedge;
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ptedge->v[0] = pfrontexit;
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ptedge->v[1] = pfrontenter;
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ptedge = &pbedges[numbedges + 1];
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ptedge->pnext = psideedges[1];
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psideedges[1] = ptedge;
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ptedge->v[0] = pfrontenter;
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ptedge->v[1] = pfrontexit;
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numbedges += 2;
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}
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// draw or recurse further
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for (i=0 ; i<2 ; i++)
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{
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if (psideedges[i])
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{
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// draw if we've reached a non-solid leaf, done if all that's left is a
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// solid leaf, and continue down the tree if it's not a leaf
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pn = pnode->children[i];
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// we're done with this branch if the node or leaf isn't in the PVS
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if (pn->visframe == tr.visframecount)
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{
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if (pn->contents < 0)
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{
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if (pn->contents != CONTENTS_SOLID)
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{
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//r_currentbkey = ((mleaf_t *)pn)->cluster;
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r_currentbkey = LEAF_KEY (((mleaf_t *)pn));
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R_RenderBmodelFace (psideedges[i], psurf);
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}
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}
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else
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{
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R_RecursiveClipBPoly (psideedges[i], pnode->children[i],
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psurf);
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}
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}
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}
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}
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}
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#endif
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#if 0
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/*
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================
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R_DrawSolidClippedSubmodelPolygons
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================
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|
*/
|
|
void R_DrawSolidClippedSubmodelPolygons (model_t *pmodel)
|
|
{
|
|
int i, j, lindex;
|
|
vec_t dot;
|
|
msurface_t *psurf;
|
|
int numsurfaces;
|
|
mplane_t *pplane;
|
|
mvertex_t bverts[MAX_BMODEL_VERTS];
|
|
bedge_t bedges[MAX_BMODEL_EDGES], *pbedge;
|
|
medge_t *pedge, *pedges;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
psurf = &pmodel->surfaces[pmodel->firstmodelsurface];
|
|
numsurfaces = pmodel->nummodelsurfaces;
|
|
pedges = pmodel->edges;
|
|
|
|
for (i=0 ; i<numsurfaces ; i++, psurf++)
|
|
{
|
|
// find which side of the node we are on
|
|
pplane = psurf->plane;
|
|
|
|
dot = DotProduct (modelorg, pplane->normal) - pplane->dist;
|
|
|
|
// draw the polygon
|
|
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
{
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
// copy the edges to bedges, flipping if necessary so always
|
|
// clockwise winding
|
|
// FIXME: if edges and vertices get caches, these assignments must move
|
|
// outside the loop, and overflow checking must be done here
|
|
pbverts = bverts;
|
|
pbedges = bedges;
|
|
numbverts = numbedges = 0;
|
|
|
|
if (psurf->numedges > 0)
|
|
{
|
|
pbedge = &bedges[numbedges];
|
|
numbedges += psurf->numedges;
|
|
|
|
for (j=0 ; j<psurf->numedges ; j++)
|
|
{
|
|
lindex = pmodel->surfedges[psurf->firstedge+j];
|
|
|
|
if (lindex > 0)
|
|
{
|
|
pedge = &pedges[lindex];
|
|
pbedge[j].v[0] = &r_pcurrentvertbase[pedge->v[0]];
|
|
pbedge[j].v[1] = &r_pcurrentvertbase[pedge->v[1]];
|
|
}
|
|
else
|
|
{
|
|
lindex = -lindex;
|
|
pedge = &pedges[lindex];
|
|
pbedge[j].v[0] = &r_pcurrentvertbase[pedge->v[1]];
|
|
pbedge[j].v[1] = &r_pcurrentvertbase[pedge->v[0]];
|
|
}
|
|
|
|
pbedge[j].pnext = &pbedge[j+1];
|
|
}
|
|
|
|
pbedge[j-1].pnext = NULL; // mark end of edges
|
|
|
|
R_RecursiveClipBPoly (pbedge, RI.currententity->topnode, psurf);
|
|
}
|
|
else
|
|
{
|
|
gEngfuncs.Host_Error ("no edges in bmodel");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_DrawSubmodelPolygons
|
|
================
|
|
*/
|
|
void R_DrawSubmodelPolygons (model_t *pmodel, int clipflags)
|
|
{
|
|
int i;
|
|
vec_t dot;
|
|
msurface_t *psurf;
|
|
int numsurfaces;
|
|
mplane_t *pplane;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
psurf = &pmodel->surfaces[pmodel->firstmodelsurface];
|
|
numsurfaces = pmodel->nummodelsurfaces;
|
|
|
|
for (i=0 ; i<numsurfaces ; i++, psurf++)
|
|
{
|
|
// find which side of the node we are on
|
|
pplane = psurf->plane;
|
|
|
|
dot = DotProduct (modelorg, pplane->normal) - pplane->dist;
|
|
|
|
// draw the polygon
|
|
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
{
|
|
r_currentkey = ((mleaf_t *)RI.currententity->topnode)->cluster;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
R_RenderFace (psurf, clipflags);
|
|
}
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
================
|
|
R_DrawSolidClippedSubmodelPolygons
|
|
|
|
Bmodel crosses multiple leafs
|
|
================
|
|
*/
|
|
void R_DrawSolidClippedSubmodelPolygons (model_t *pmodel, mnode_t *topnode)
|
|
{
|
|
int i, j, lindex;
|
|
vec_t dot;
|
|
msurface_t *psurf;
|
|
int numsurfaces;
|
|
mplane_t *pplane;
|
|
mvertex_t bverts[MAX_BMODEL_VERTS];
|
|
bedge_t bedges[MAX_BMODEL_EDGES], *pbedge;
|
|
medge_t *pedge, *pedges;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
psurf = &pmodel->surfaces[pmodel->firstmodelsurface];
|
|
numsurfaces = pmodel->nummodelsurfaces;
|
|
pedges = pmodel->edges;
|
|
|
|
for (i=0 ; i<numsurfaces ; i++, psurf++)
|
|
{
|
|
if( FBitSet( psurf->flags, SURF_DRAWTURB ) && !ENGINE_GET_PARM( PARM_QUAKE_COMPATIBLE ))
|
|
{
|
|
if( psurf->plane->type != PLANE_Z && !FBitSet( RI.currententity->curstate.effects, EF_WATERSIDES ))
|
|
continue;
|
|
if( r_entorigin[2] + pmodel->mins[2] + 1.0f >= psurf->plane->dist )
|
|
continue;
|
|
}
|
|
// find which side of the node we are on
|
|
pplane = psurf->plane;
|
|
|
|
dot = DotProduct (tr.modelorg, pplane->normal) - pplane->dist;
|
|
|
|
// draw the polygon
|
|
if (( !(psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
((psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
continue;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
// copy the edges to bedges, flipping if necessary so always
|
|
// clockwise winding
|
|
// FIXME: if edges and vertices get caches, these assignments must move
|
|
// outside the loop, and overflow checking must be done here
|
|
pbverts = bverts;
|
|
pbedges = bedges;
|
|
numbverts = numbedges = 0;
|
|
pbedge = &bedges[numbedges];
|
|
numbedges += psurf->numedges;
|
|
|
|
for (j=0 ; j<psurf->numedges ; j++)
|
|
{
|
|
lindex = pmodel->surfedges[psurf->firstedge+j];
|
|
|
|
if (lindex > 0)
|
|
{
|
|
pedge = &pedges[lindex];
|
|
pbedge[j].v[0] = &r_pcurrentvertbase[pedge->v[0]];
|
|
pbedge[j].v[1] = &r_pcurrentvertbase[pedge->v[1]];
|
|
}
|
|
else
|
|
{
|
|
lindex = -lindex;
|
|
pedge = &pedges[lindex];
|
|
pbedge[j].v[0] = &r_pcurrentvertbase[pedge->v[1]];
|
|
pbedge[j].v[1] = &r_pcurrentvertbase[pedge->v[0]];
|
|
}
|
|
|
|
pbedge[j].pnext = &pbedge[j+1];
|
|
}
|
|
|
|
pbedge[j-1].pnext = NULL; // mark end of edges
|
|
|
|
//if ( !( psurf->texinfo->flags & ( SURF_TRANS66 | SURF_TRANS33 ) ) )
|
|
R_RecursiveClipBPoly (pbedge, topnode, psurf);
|
|
//else
|
|
// R_RenderBmodelFace( pbedge, psurf );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
R_DrawSubmodelPolygons
|
|
|
|
All in one leaf
|
|
================
|
|
*/
|
|
void R_DrawSubmodelPolygons (model_t *pmodel, int clipflags, mnode_t *topnode)
|
|
{
|
|
int i;
|
|
vec_t dot;
|
|
msurface_t *psurf;
|
|
int numsurfaces;
|
|
mplane_t *pplane;
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
|
|
psurf = &pmodel->surfaces[pmodel->firstmodelsurface];
|
|
numsurfaces = pmodel->nummodelsurfaces;
|
|
|
|
for (i=0 ; i<numsurfaces ; i++, psurf++)
|
|
{
|
|
if( FBitSet( psurf->flags, SURF_DRAWTURB ) && !ENGINE_GET_PARM( PARM_QUAKE_COMPATIBLE ))
|
|
{
|
|
if( psurf->plane->type != PLANE_Z && !FBitSet( RI.currententity->curstate.effects, EF_WATERSIDES ))
|
|
continue;
|
|
if( r_entorigin[2] + pmodel->mins[2] + 1.0f >= psurf->plane->dist )
|
|
continue;
|
|
}
|
|
// find which side of the node we are on
|
|
pplane = psurf->plane;
|
|
|
|
dot = DotProduct (tr.modelorg, pplane->normal) - pplane->dist;
|
|
|
|
// draw the polygon
|
|
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
{
|
|
r_currentkey = LEAF_KEY(((mleaf_t *)topnode));
|
|
|
|
// FIXME: use bounding-box-based frustum clipping info?
|
|
R_RenderFace (psurf, clipflags);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
int c_drawnode;
|
|
#if XASH_LOW_MEMORY
|
|
unsigned short r_leafkeys[MAX_MAP_LEAFS];
|
|
#else
|
|
int r_leafkeys[MAX_MAP_LEAFS];
|
|
#endif
|
|
/*
|
|
================
|
|
R_RecursiveWorldNode
|
|
================
|
|
*/
|
|
void R_RecursiveWorldNode (mnode_t *node, int clipflags)
|
|
{
|
|
int i, c, side, *pindex;
|
|
vec3_t acceptpt, rejectpt;
|
|
mplane_t *plane;
|
|
msurface_t *surf, **mark;
|
|
mleaf_t *pleaf;
|
|
double d, dot;
|
|
|
|
if (node->contents == CONTENTS_SOLID)
|
|
return; // solid
|
|
|
|
if (node->visframe != tr.visframecount)
|
|
return;
|
|
|
|
// cull the clipping planes if not trivial accept
|
|
// FIXME: the compiler is doing a lousy job of optimizing here; it could be
|
|
// twice as fast in ASM
|
|
if (clipflags)
|
|
{
|
|
for (i=0 ; i<4 ; i++)
|
|
{
|
|
if (! (clipflags & (1<<i)) )
|
|
continue; // don't need to clip against it
|
|
|
|
// generate accept and reject points
|
|
// FIXME: do with fast look-ups or integer tests based on the sign bit
|
|
// of the floating point values
|
|
|
|
pindex = qfrustum.pfrustum_indexes[i];
|
|
|
|
rejectpt[0] = (float)node->minmaxs[pindex[0]];
|
|
rejectpt[1] = (float)node->minmaxs[pindex[1]];
|
|
rejectpt[2] = (float)node->minmaxs[pindex[2]];
|
|
|
|
d = DotProduct (rejectpt, qfrustum.view_clipplanes[i].normal);
|
|
d -= qfrustum.view_clipplanes[i].dist;
|
|
|
|
if (d <= 0)
|
|
return;
|
|
|
|
acceptpt[0] = (float)node->minmaxs[pindex[3+0]];
|
|
acceptpt[1] = (float)node->minmaxs[pindex[3+1]];
|
|
acceptpt[2] = (float)node->minmaxs[pindex[3+2]];
|
|
|
|
d = DotProduct (acceptpt, qfrustum.view_clipplanes[i].normal);
|
|
d -= qfrustum.view_clipplanes[i].dist;
|
|
|
|
if (d >= 0)
|
|
clipflags &= ~(1<<i); // node is entirely on screen
|
|
}
|
|
}
|
|
|
|
// if a leaf node, draw stuff
|
|
if (node->contents < 0)
|
|
{
|
|
pleaf = (mleaf_t *)node;
|
|
|
|
mark = pleaf->firstmarksurface;
|
|
c = pleaf->nummarksurfaces;
|
|
|
|
if (c)
|
|
{
|
|
do
|
|
{
|
|
(*mark)->visframe = tr.framecount;
|
|
mark++;
|
|
} while (--c);
|
|
}
|
|
|
|
// deal with model fragments in this leaf
|
|
if (pleaf->efrags)
|
|
{
|
|
gEngfuncs.R_StoreEfrags(&pleaf->efrags,tr.realframecount);
|
|
}
|
|
|
|
|
|
// pleaf->cluster
|
|
LEAF_KEY(pleaf) = r_currentkey;
|
|
r_currentkey++; // all bmodels in a leaf share the same key
|
|
}
|
|
else
|
|
{
|
|
// node is just a decision point, so go down the apropriate sides
|
|
|
|
// find which side of the node we are on
|
|
plane = node->plane;
|
|
|
|
switch (plane->type)
|
|
{
|
|
case PLANE_X:
|
|
dot = tr.modelorg[0] - plane->dist;
|
|
break;
|
|
case PLANE_Y:
|
|
dot = tr.modelorg[1] - plane->dist;
|
|
break;
|
|
case PLANE_Z:
|
|
dot = tr.modelorg[2] - plane->dist;
|
|
break;
|
|
default:
|
|
dot = DotProduct (tr.modelorg, plane->normal) - plane->dist;
|
|
break;
|
|
}
|
|
|
|
if (dot >= 0)
|
|
side = 0;
|
|
else
|
|
side = 1;
|
|
|
|
// recurse down the children, front side first
|
|
R_RecursiveWorldNode (node->children[side], clipflags);
|
|
|
|
// draw stuff
|
|
c = node->numsurfaces;
|
|
|
|
if (c)
|
|
{
|
|
surf = WORLDMODEL->surfaces + node->firstsurface;
|
|
|
|
if (dot < -BACKFACE_EPSILON)
|
|
{
|
|
do
|
|
{
|
|
if ((surf->flags & SURF_PLANEBACK) &&
|
|
(surf->visframe == tr.framecount))
|
|
{
|
|
R_RenderFace (surf, clipflags);
|
|
}
|
|
|
|
surf++;
|
|
} while (--c);
|
|
}
|
|
else if (dot > BACKFACE_EPSILON)
|
|
{
|
|
do
|
|
{
|
|
if (!(surf->flags & SURF_PLANEBACK) &&
|
|
(surf->visframe == tr.framecount))
|
|
{
|
|
R_RenderFace (surf, clipflags);
|
|
}
|
|
|
|
surf++;
|
|
} while (--c);
|
|
}
|
|
|
|
// all surfaces on the same node share the same sequence number
|
|
r_currentkey++;
|
|
}
|
|
|
|
// recurse down the back side
|
|
R_RecursiveWorldNode (node->children[!side], clipflags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
R_RenderWorld
|
|
================
|
|
*/
|
|
void R_RenderWorld (void)
|
|
{
|
|
|
|
//if (!r_drawworld->value)
|
|
// return;
|
|
if ( !RI.drawWorld )
|
|
return;
|
|
|
|
c_drawnode=0;
|
|
|
|
// auto cycle the world frame for texture animation
|
|
RI.currententity = gEngfuncs.GetEntityByIndex(0);
|
|
//RI.currententity->frame = (int)(gpGlobals->time*2);
|
|
|
|
VectorCopy (RI.vieworg, tr.modelorg);
|
|
RI.currentmodel = WORLDMODEL;
|
|
r_pcurrentvertbase = RI.currentmodel->vertexes;
|
|
|
|
R_RecursiveWorldNode (RI.currentmodel->nodes, 15);
|
|
}
|