return (mleaf_t *)node;
}
+/*
static int Mod_Q1BSP_PointContents(model_t *model, const vec3_t p)
{
mnode_t *node;
return ((mleaf_t *)node)->contents;
}
+*/
typedef struct findnonsolidlocationinfo_s
{
VectorCopy(info.center, out);
}
+typedef struct
+{
+ // the hull we're tracing through
+ const hull_t *hull;
+
+ // the trace structure to fill in
+ trace_t *trace;
+
+ // start, end, and end - start (in model space)
+ double start[3];
+ double end[3];
+ double dist[3];
+}
+RecursiveHullCheckTraceInfo_t;
+
+// 1/32 epsilon to keep floating point happy
+#define DIST_EPSILON (0.03125)
+
+#define HULLCHECKSTATE_EMPTY 0
+#define HULLCHECKSTATE_SOLID 1
+#define HULLCHECKSTATE_DONE 2
+
+static int Mod_Q1BSP_RecursiveHullCheck(RecursiveHullCheckTraceInfo_t *t, int num, double p1f, double p2f, double p1[3], double p2[3])
+{
+ // status variables, these don't need to be saved on the stack when
+ // recursing... but are because this should be thread-safe
+ // (note: tracing against a bbox is not thread-safe, yet)
+ int ret;
+ mplane_t *plane;
+ double t1, t2;
+
+ // variables that need to be stored on the stack when recursing
+ dclipnode_t *node;
+ int side;
+ double midf, mid[3];
+
+ // LordHavoc: a goto! everyone flee in terror... :)
+loc0:
+ // check for empty
+ if (num < 0)
+ {
+ t->trace->endcontents = num;
+ if (t->trace->thiscontents)
+ {
+ if (num == t->trace->thiscontents)
+ t->trace->allsolid = false;
+ else
+ {
+ // if the first leaf is solid, set startsolid
+ if (t->trace->allsolid)
+ t->trace->startsolid = true;
+ return HULLCHECKSTATE_SOLID;
+ }
+ return HULLCHECKSTATE_EMPTY;
+ }
+ else
+ {
+ if (num != CONTENTS_SOLID)
+ {
+ t->trace->allsolid = false;
+ if (num == CONTENTS_EMPTY)
+ t->trace->inopen = true;
+ else
+ t->trace->inwater = true;
+ }
+ else
+ {
+ // if the first leaf is solid, set startsolid
+ if (t->trace->allsolid)
+ t->trace->startsolid = true;
+ return HULLCHECKSTATE_SOLID;
+ }
+ return HULLCHECKSTATE_EMPTY;
+ }
+ }
+
+ // find the point distances
+ node = t->hull->clipnodes + num;
+
+ plane = t->hull->planes + node->planenum;
+ if (plane->type < 3)
+ {
+ t1 = p1[plane->type] - plane->dist;
+ t2 = p2[plane->type] - plane->dist;
+ }
+ else
+ {
+ t1 = DotProduct (plane->normal, p1) - plane->dist;
+ t2 = DotProduct (plane->normal, p2) - plane->dist;
+ }
+
+ if (t1 < 0)
+ {
+ if (t2 < 0)
+ {
+ num = node->children[1];
+ goto loc0;
+ }
+ side = 1;
+ }
+ else
+ {
+ if (t2 >= 0)
+ {
+ num = node->children[0];
+ goto loc0;
+ }
+ side = 0;
+ }
+
+ // the line intersects, find intersection point
+ // LordHavoc: this uses the original trace for maximum accuracy
+ if (plane->type < 3)
+ {
+ t1 = t->start[plane->type] - plane->dist;
+ t2 = t->end[plane->type] - plane->dist;
+ }
+ else
+ {
+ t1 = DotProduct (plane->normal, t->start) - plane->dist;
+ t2 = DotProduct (plane->normal, t->end) - plane->dist;
+ }
+
+ midf = t1 / (t1 - t2);
+ midf = bound(p1f, midf, p2f);
+ VectorMA(t->start, midf, t->dist, mid);
+
+ // recurse both sides, front side first
+ ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[side], p1f, midf, p1, mid);
+ // if this side is not empty, return what it is (solid or done)
+ if (ret != HULLCHECKSTATE_EMPTY)
+ return ret;
+
+ ret = Mod_Q1BSP_RecursiveHullCheck(t, node->children[side ^ 1], midf, p2f, mid, p2);
+ // if other side is not solid, return what it is (empty or done)
+ if (ret != HULLCHECKSTATE_SOLID)
+ return ret;
+
+ // front is air and back is solid, this is the impact point...
+ if (side)
+ {
+ t->trace->plane.dist = -plane->dist;
+ VectorNegate (plane->normal, t->trace->plane.normal);
+ }
+ else
+ {
+ t->trace->plane.dist = plane->dist;
+ VectorCopy (plane->normal, t->trace->plane.normal);
+ }
+
+ // bias away from surface a bit
+ t1 = DotProduct(t->trace->plane.normal, t->start) - (t->trace->plane.dist + DIST_EPSILON);
+ t2 = DotProduct(t->trace->plane.normal, t->end) - (t->trace->plane.dist + DIST_EPSILON);
+
+ midf = t1 / (t1 - t2);
+ t->trace->fraction = bound(0.0f, midf, 1.0);
+
+ return HULLCHECKSTATE_DONE;
+}
+
+static void Mod_Q1BSP_TraceBox(struct model_s *model, trace_t *trace, const vec3_t boxstartmins, const vec3_t boxstartmaxs, const vec3_t boxendmins, const vec3_t boxendmaxs)
+{
+ // this function currently only supports same size start and end
+ double boxsize[3];
+ RecursiveHullCheckTraceInfo_t rhc;
+
+ memset(&rhc, 0, sizeof(rhc));
+ memset(trace, 0, sizeof(trace_t));
+ rhc.trace = trace;
+ rhc.trace->fraction = 1;
+ rhc.trace->allsolid = true;
+ VectorSubtract(boxstartmaxs, boxstartmins, boxsize);
+ if (boxsize[0] < 3)
+ rhc.hull = &model->brushq1.hulls[0]; // 0x0x0
+ else if (model->brushq1.ishlbsp)
+ {
+ if (boxsize[0] <= 32)
+ {
+ if (boxsize[2] < 54) // pick the nearest of 36 or 72
+ rhc.hull = &model->brushq1.hulls[3]; // 32x32x36
+ else
+ rhc.hull = &model->brushq1.hulls[1]; // 32x32x72
+ }
+ else
+ rhc.hull = &model->brushq1.hulls[2]; // 64x64x64
+ }
+ else
+ {
+ if (boxsize[0] <= 32)
+ rhc.hull = &model->brushq1.hulls[1]; // 32x32x56
+ else
+ rhc.hull = &model->brushq1.hulls[2]; // 64x64x88
+ }
+ VectorSubtract(boxstartmins, rhc.hull->clip_mins, rhc.start);
+ VectorSubtract(boxendmins, rhc.hull->clip_mins, rhc.end);
+ VectorSubtract(rhc.end, rhc.start, rhc.dist);
+ Mod_Q1BSP_RecursiveHullCheck(&rhc, rhc.hull->firstclipnode, 0, 1, rhc.start, rhc.end);
+}
+
static qbyte *Mod_Q1BSP_DecompressVis(model_t *model, qbyte *in)
{
static qbyte decompressed[MAX_MAP_LEAFS/8];
mod->brushq1.ishlbsp = i == 30;
mod->brush.FindNonSolidLocation = Mod_Q1BSP_FindNonSolidLocation;
- mod->brush.PointContents = Mod_Q1BSP_PointContents;
+ mod->brush.TraceBox = Mod_Q1BSP_TraceBox;
mod->brushq1.PointInLeaf = Mod_Q1BSP_PointInLeaf;
mod->brushq1.LeafPVS = Mod_Q1BSP_LeafPVS;
mod->brushq1.BuildPVSTextureChains = Mod_Q1BSP_BuildPVSTextureChains;
projects / xonotic / darkplaces.git / blobdiff