]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - cl_collision.c
Reworked v_isometric code significantly, it now defaults to a proper isometric view...
[xonotic/darkplaces.git] / cl_collision.c
index d414361ca1c981e6a89cdae4f31c7740fd171ebc..eb7a4dd923517688357fb72500d0ff00cd11124f 100644 (file)
@@ -18,7 +18,7 @@ float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, ve
        if (hitent)
                *hitent = 0;
        if (cl.worldmodel && cl.worldmodel->TraceLine)
-               cl.worldmodel->TraceLine(cl.worldmodel, NULL, NULL, &trace, start, end, SUPERCONTENTS_SOLID);
+               cl.worldmodel->TraceLine(cl.worldmodel, NULL, NULL, &trace, start, end, SUPERCONTENTS_SOLID, 0, 0);
 
        if (normal)
                VectorCopy(trace.plane.normal, normal);
@@ -50,11 +50,11 @@ float CL_SelectTraceLine(const vec3_t start, const vec3_t end, vec3_t impact, ve
                        continue;
                Matrix4x4_Transform(&ent->inversematrix, start, starttransformed);
                Matrix4x4_Transform(&ent->inversematrix, end, endtransformed);
-               Collision_ClipTrace_Box(&trace, ent->model->normalmins, ent->model->normalmaxs, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID, SUPERCONTENTS_SOLID, 0, NULL);
+               Collision_ClipTrace_Box(&trace, ent->model->normalmins, ent->model->normalmaxs, starttransformed, vec3_origin, vec3_origin, endtransformed, SUPERCONTENTS_SOLID, 0, 0, SUPERCONTENTS_SOLID, 0, NULL);
                if (maxfrac < trace.fraction)
                        continue;
 
-               ent->model->TraceLine(ent->model, ent->frameblend, ent->skeleton, &trace, starttransformed, endtransformed, SUPERCONTENTS_SOLID);
+               ent->model->TraceLine(ent->model, ent->frameblend, ent->skeleton, &trace, starttransformed, endtransformed, SUPERCONTENTS_SOLID, 0, 0);
 
                if (maxfrac > trace.fraction)
                {
@@ -203,7 +203,7 @@ int CL_GenericHitSuperContentsMask(const prvm_edict_t *passedict)
 CL_Move
 ==================
 */
-trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int hitsupercontentsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
+trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
 {
        prvm_prog_t *prog = CLVM_prog;
        int i, bodysupercontents;
@@ -239,7 +239,7 @@ trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
 #endif
 
        // clip to world
-       Collision_ClipPointToWorld(&cliptrace, cl.worldmodel, clipstart, hitsupercontentsmask);
+       Collision_ClipPointToWorld(&cliptrace, cl.worldmodel, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
        if (cliptrace.startsolid || cliptrace.fraction < 1)
                cliptrace.ent = prog ? prog->edicts : NULL;
@@ -288,7 +288,7 @@ trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
                        entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                        if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                                continue;
-                       Collision_ClipPointToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, hitsupercontentsmask);
+                       Collision_ClipPointToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = cl.brushmodel_entities[i];
                        Collision_CombineTraces(&cliptrace, &trace, NULL, true);
@@ -336,7 +336,7 @@ trace_t CL_TracePoint(const vec3_t start, int type, prvm_edict_t *passedict, int
                                continue;
                        Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                        Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
-                       Collision_ClipPointToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, hitsupercontentsmask);
+                       Collision_ClipPointToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = i;
                        Collision_CombineTraces(&cliptrace, &trace, NULL, false);
@@ -400,9 +400,9 @@ skipnetworkplayers:
                VectorCopy(PRVM_clientedictvector(touch, mins), touchmins);
                VectorCopy(PRVM_clientedictvector(touch, maxs), touchmaxs);
                if ((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
-                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipstart, hitsupercontentsmask, 0.0f);
+                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, 0.0f);
                else
-                       Collision_ClipPointToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, hitsupercontentsmask);
+                       Collision_ClipPointToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
 
                if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                        *hitnetworkentity = 0;
@@ -418,7 +418,7 @@ finished:
 CL_TraceLine
 ==================
 */
-trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, float extend, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities, qboolean hitsurfaces)
+trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities, qboolean hitsurfaces)
 {
        prvm_prog_t *prog = CLVM_prog;
        int i, bodysupercontents;
@@ -443,7 +443,7 @@ trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
        int numtouchedicts;
        static prvm_edict_t *touchedicts[MAX_EDICTS];
        if (VectorCompare(start, end))
-               return CL_TracePoint(start, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
+               return CL_TracePoint(start, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
 
        if (hitnetworkentity)
                *hitnetworkentity = 0;
@@ -457,7 +457,7 @@ trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
 #endif
 
        // clip to world
-       Collision_ClipLineToWorld(&cliptrace, cl.worldmodel, clipstart, clipend, hitsupercontentsmask, extend, hitsurfaces);
+       Collision_ClipLineToWorld(&cliptrace, cl.worldmodel, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, hitsurfaces);
        cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
        if (cliptrace.startsolid || cliptrace.fraction < 1)
                cliptrace.ent = prog ? prog->edicts : NULL;
@@ -506,7 +506,7 @@ trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
                        entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                        if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                                continue;
-                       Collision_ClipLineToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, end, hitsupercontentsmask, extend, hitsurfaces);
+                       Collision_ClipLineToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, hitsurfaces);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = cl.brushmodel_entities[i];
                        Collision_CombineTraces(&cliptrace, &trace, NULL, true);
@@ -554,7 +554,7 @@ trace_t CL_TraceLine(const vec3_t start, const vec3_t end, int type, prvm_edict_
                                continue;
                        Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                        Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
-                       Collision_ClipLineToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, end, hitsupercontentsmask, extend, hitsurfaces);
+                       Collision_ClipLineToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, hitsurfaces);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = i;
                        Collision_CombineTraces(&cliptrace, &trace, NULL, false);
@@ -618,9 +618,9 @@ skipnetworkplayers:
                VectorCopy(PRVM_clientedictvector(touch, mins), touchmins);
                VectorCopy(PRVM_clientedictvector(touch, maxs), touchmaxs);
                if (type == MOVE_MISSILE && (int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
-                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, extend);
+                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
                else
-                       Collision_ClipLineToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask, extend, hitsurfaces);
+                       Collision_ClipLineToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, hitsurfaces);
 
                if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                        *hitnetworkentity = 0;
@@ -636,7 +636,7 @@ finished:
 CL_Move
 ==================
 */
-trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, float extend, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
+trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask, float extend, qboolean hitnetworkbrushmodels, qboolean hitnetworkplayers, int *hitnetworkentity, qboolean hitcsqcentities)
 {
        prvm_prog_t *prog = CLVM_prog;
        vec3_t hullmins, hullmaxs;
@@ -670,9 +670,9 @@ trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
                VectorAdd(start, mins, shiftstart);
                VectorAdd(end, mins, shiftend);
                if (VectorCompare(start, end))
-                       trace = CL_TracePoint(shiftstart, type, passedict, hitsupercontentsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
+                       trace = CL_TracePoint(shiftstart, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities);
                else
-                       trace = CL_TraceLine(shiftstart, shiftend, type, passedict, hitsupercontentsmask, extend, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities, false);
+                       trace = CL_TraceLine(shiftstart, shiftend, type, passedict, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend, hitnetworkbrushmodels, hitnetworkplayers, hitnetworkentity, hitcsqcentities, false);
                VectorSubtract(trace.endpos, mins, trace.endpos);
                return trace;
        }
@@ -691,7 +691,7 @@ trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
 #endif
 
        // clip to world
-       Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, extend);
+       Collision_ClipToWorld(&cliptrace, cl.worldmodel, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
        cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
        if (cliptrace.startsolid || cliptrace.fraction < 1)
                cliptrace.ent = prog ? prog->edicts : NULL;
@@ -751,7 +751,7 @@ trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
                        entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                        if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                                continue;
-                       Collision_ClipToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask, extend);
+                       Collision_ClipToGenericEntity(&trace, ent->model, ent->frameblend, ent->skeleton, vec3_origin, vec3_origin, 0, &ent->matrix, &ent->inversematrix, start, mins, maxs, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = cl.brushmodel_entities[i];
                        Collision_CombineTraces(&cliptrace, &trace, NULL, true);
@@ -799,7 +799,7 @@ trace_t CL_TraceBox(const vec3_t start, const vec3_t mins, const vec3_t maxs, co
                                continue;
                        Matrix4x4_CreateTranslate(&entmatrix, origin[0], origin[1], origin[2]);
                        Matrix4x4_CreateTranslate(&entinversematrix, -origin[0], -origin[1], -origin[2]);
-                       Collision_ClipToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask, extend);
+                       Collision_ClipToGenericEntity(&trace, NULL, NULL, NULL, cl.playerstandmins, cl.playerstandmaxs, SUPERCONTENTS_BODY, &entmatrix, &entinversematrix, start, mins, maxs, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
                        if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                                *hitnetworkentity = i;
                        Collision_CombineTraces(&cliptrace, &trace, NULL, false);
@@ -863,9 +863,9 @@ skipnetworkplayers:
                VectorCopy(PRVM_clientedictvector(touch, mins), touchmins);
                VectorCopy(PRVM_clientedictvector(touch, maxs), touchmaxs);
                if ((int)PRVM_clientedictfloat(touch, flags) & FL_MONSTER)
-                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, extend);
+                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins2, clipmaxs2, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
                else
-                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, extend);
+                       Collision_ClipToGenericEntity(&trace, model, touch->priv.server->frameblend, &touch->priv.server->skeleton, touchmins, touchmaxs, bodysupercontents, &matrix, &imatrix, clipstart, clipmins, clipmaxs, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask, extend);
 
                if (cliptrace.fraction > trace.fraction && hitnetworkentity)
                        *hitnetworkentity = 0;
@@ -881,7 +881,7 @@ finished:
 CL_Cache_TraceLine
 ==================
 */
-trace_t CL_Cache_TraceLineSurfaces(const vec3_t start, const vec3_t end, int type, int hitsupercontentsmask)
+trace_t CL_Cache_TraceLineSurfaces(const vec3_t start, const vec3_t end, int type, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
 {
        prvm_prog_t *prog = CLVM_prog;
        int i;
@@ -908,7 +908,7 @@ trace_t CL_Cache_TraceLineSurfaces(const vec3_t start, const vec3_t end, int typ
 #endif
 
        // clip to world
-       Collision_Cache_ClipLineToWorldSurfaces(&cliptrace, cl.worldmodel, clipstart, clipend, hitsupercontentsmask);
+       Collision_Cache_ClipLineToWorldSurfaces(&cliptrace, cl.worldmodel, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        cliptrace.worldstartsolid = cliptrace.bmodelstartsolid = cliptrace.startsolid;
        if (cliptrace.startsolid || cliptrace.fraction < 1)
                cliptrace.ent = prog ? prog->edicts : NULL;
@@ -932,7 +932,7 @@ trace_t CL_Cache_TraceLineSurfaces(const vec3_t start, const vec3_t end, int typ
                entity_render_t *ent = &cl.entities[cl.brushmodel_entities[i]].render;
                if (!BoxesOverlap(clipboxmins, clipboxmaxs, ent->mins, ent->maxs))
                        continue;
-               Collision_Cache_ClipLineToGenericEntitySurfaces(&trace, ent->model, &ent->matrix, &ent->inversematrix, start, end, hitsupercontentsmask);
+               Collision_Cache_ClipLineToGenericEntitySurfaces(&trace, ent->model, &ent->matrix, &ent->inversematrix, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                Collision_CombineTraces(&cliptrace, &trace, NULL, true);
        }
 
@@ -959,14 +959,14 @@ trace_t CL_Cache_TraceLineSurfaces(const vec3_t start, const vec3_t end, int typ
                model = CL_GetModelFromEdict(touch);
                if (!model)
                        continue;
-               // animated models are too slow to collide against and can't be cached
-               if (touch->priv.server->frameblend || touch->priv.server->skeleton.relativetransforms)
+               // animated models are not suitable for caching
+               if ((touch->priv.server->frameblend && (touch->priv.server->frameblend[0].lerp != 1.0 || touch->priv.server->frameblend[0].subframe != 0)) || touch->priv.server->skeleton.relativetransforms)
                        continue;
                if (type == MOVE_NOMONSTERS && PRVM_clientedictfloat(touch, solid) != SOLID_BSP)
                        continue;
                Matrix4x4_CreateFromQuakeEntity(&matrix, PRVM_clientedictvector(touch, origin)[0], PRVM_clientedictvector(touch, origin)[1], PRVM_clientedictvector(touch, origin)[2], PRVM_clientedictvector(touch, angles)[0], PRVM_clientedictvector(touch, angles)[1], PRVM_clientedictvector(touch, angles)[2], 1);
                Matrix4x4_Invert_Simple(&imatrix, &matrix);
-               Collision_Cache_ClipLineToGenericEntitySurfaces(&trace, model, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask);
+               Collision_Cache_ClipLineToGenericEntitySurfaces(&trace, model, &matrix, &imatrix, clipstart, clipend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
                Collision_CombineTraces(&cliptrace, &trace, (void *)touch, PRVM_clientedictfloat(touch, solid) == SOLID_BSP);
        }