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Give the fields of pstack_t clearer names.

Browse source 
And some comments.
This commit is contained in:
Bill Currie 2013-03-17 19:18:38 +09:00
parent 1ea79e8626
commit ccc432a7ea
2 changed files with 36 additions and 31 deletions
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9
tools/qfvis/include/vis.h
View file

@ -98,10 +98,11 @@ typedef struct cluster_s {
typedef struct pstack_s {
struct pstack_s *next; ///< linked list of active stack objects
cluster_t *cluster;
portal_t *portal; // portal exiting
winding_t *source, *pass;
plane_t portalplane;
cluster_t *cluster; ///< the cluster being sub-vised
winding_t *source_winding; ///< clipped source portal winding
portal_t *pass_portal; ///< the portal exiting from the cluster
winding_t *pass_winding; ///< clipped pass portal winding
plane_t pass_plane; ///< plane of the pass portal
sep_t *separators[2];
set_t mightsee;
} pstack_t;

58
tools/qfvis/source/flow.c
View file

@ -298,7 +298,7 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
}
stack->cluster = cluster;
stack->portal = NULL;
stack->pass_portal = NULL;
stack->separators[0] = 0;
stack->separators[1] = 0;
might = &stack->mightsee;
@ -319,37 +319,38 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
}
// get plane of portal, point normal into the neighbor cluster
stack->portalplane = portal->plane;
VectorNegate (portal->plane.normal, backplane.normal);
backplane.dist = -portal->plane.dist;
if (_VectorCompare (prevstack->portalplane.normal, backplane.normal))
if (_VectorCompare (prevstack->pass_plane.normal, backplane.normal))
continue; // can't go out a coplanar face
thread->stats.portalcheck++;
stack->portal = portal;
target = ClipWinding (portal->winding,
&thread->pstack_head->portalplane, false);
&thread->pstack_head->pass_plane, false);
if (!target)
continue;
if (!prevstack->pass) {
if (!prevstack->pass_winding) {
// the second cluster can be blocked only if coplanar
stack->source = prevstack->source;
stack->pass = target;
stack->source_winding = prevstack->source_winding;
stack->pass_winding = target;
stack->pass_plane = portal->plane;
stack->pass_portal = portal;
RecursiveClusterFlow (portal->cluster, thread, stack);
FreeWinding (target);
continue;
}
target = ClipWinding (target, &prevstack->portalplane, false);
target = ClipWinding (target, &prevstack->pass_plane, false);
if (!target)
continue;
source = CopyWinding (prevstack->source);
source = CopyWinding (prevstack->source_winding);
source = ClipWinding (source, &backplane, false);
if (!source) {
@ -363,12 +364,12 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
if (options.level > 0) {
// clip target to the image that would be formed by a laser
// pointing from the edges of source passing though the corners of
// pass
// pass_winding
winding_t *old = target;
if (!stack->separators[0])
stack->separators[0] = FindSeparators (thread, source,
thread->pstack_head->portalplane,
prevstack->pass, 0);
thread->pstack_head->pass_plane,
prevstack->pass_winding, 0);
target = ClipToSeparators (stack->separators[0], target);
if (!target) {
thread->stats.targetclipped++;
@ -380,16 +381,16 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
}
if (options.level > 1) {
// now pass the laser along the edges of pass from the corners of
// now pass the laser along the edges of pass_winding from the corners of
// source. the resulting image will have a smaller aree. The
// resulting shape will be the light image produced by a backlit
// source shining past pass. eg, if source and pass are equilateral
// source shining past pass_winding. eg, if source and pass_winding are equilateral
// triangles rotated 60 (or 180) degrees relative to each other,
// parallel and in line, target will wind up being a hexagon.
winding_t *old = target;
if (!stack->separators[1])
stack->separators[1] = FindSeparators (thread, prevstack->pass,
prevstack->portalplane,
stack->separators[1] = FindSeparators (thread, prevstack->pass_winding,
prevstack->pass_plane,
source, 1);
target = ClipToSeparators (stack->separators[1], target);
if (!target) {
@ -408,7 +409,7 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
winding_t *old = source;
sep_t *sep;
sep = FindSeparators (thread, target, portal->plane,
prevstack->pass, 0);
prevstack->pass_winding, 0);
source = ClipToSeparators (sep, source);
free_separators (thread, sep);
if (!source) {
@ -423,8 +424,8 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
if (options.level > 3) {
winding_t *old = source;
sep_t *sep;
sep = FindSeparators (thread, prevstack->pass,
prevstack->portalplane, target, 1);
sep = FindSeparators (thread, prevstack->pass_winding,
prevstack->pass_plane, target, 1);
source = ClipToSeparators (sep, source);
free_separators (thread, sep);
if (!source) {
@ -436,8 +437,11 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
thread->stats.sourcetrimmed++;
}
stack->source = source;
stack->pass = target;
stack->source_winding = source;
stack->pass_winding = target;
stack->pass_plane = portal->plane;
stack->pass_portal = portal;
thread->stats.portalpass++;
@ -467,10 +471,10 @@ PortalFlow (threaddata_t *data, portal_t *portal)
if (!data->pstack_head)
data->pstack_head = new_stack ();
data->pstack_head->cluster = 0;
data->pstack_head->portal = portal;
data->pstack_head->source = portal->winding;
data->pstack_head->pass = 0;
data->pstack_head->portalplane = portal->plane;
data->pstack_head->pass_portal = portal;
data->pstack_head->source_winding = portal->winding;
data->pstack_head->pass_winding = 0;
data->pstack_head->pass_plane = portal->plane;
set_assign (&data->pstack_head->mightsee, portal->mightsee);
data->pstack_head->separators[0] = 0;
data->pstack_head->separators[1] = 0;