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Split out the mightsee intersection/subset tests.

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Having the code in separate functions makes the flow in the main loop a
little easier to follow.
This commit is contained in:
Bill Currie 2013-03-14 19:39:27 +09:00
parent eec87bd61b
commit 8032d1d4d1
1 changed files with 29 additions and 13 deletions
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42
tools/qfvis/source/flow.c
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@ -234,6 +234,30 @@ ClipToSeparators (threaddata_t *thread, pstack_t *stack,
return target;
}
static inline set_t *
select_test_set (portal_t *portal, threaddata_t *thread)
{
set_t *test;
if (portal->status == stat_done) {
thread->stats.vistest++;
test = portal->visbits;
} else {
thread->stats.mighttest++;
test = portal->mightsee;
}
return test;
}
static inline int
mightsee_more (set_t *might, const set_t *prev_might, const set_t *test,
const set_t *vis)
{
set_assign (might, prev_might);
set_intersection (might, test);
return !set_is_subset (vis, might);
}
/*
RecursiveClusterFlow
@ -246,7 +270,6 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
int i;
set_t *might;
const set_t *test, *vis;
qboolean more;
cluster_t *cluster;
pstack_t stack;
portal_t *portal;
@ -283,20 +306,13 @@ RecursiveClusterFlow (int clusternum, threaddata_t *thread, pstack_t *prevstack)
if (!set_is_member (prevstack->mightsee, portal->cluster))
continue; // can't possibly see it
// if the portal can't see anything we haven't already seen, skip it
if (portal->status == stat_done) {
thread->stats.vistest++;
test = portal->visbits;
} else {
thread->stats.mighttest++;
test = portal->mightsee;
}
set_assign (might, prevstack->mightsee);
set_intersection (might, test);
more = !set_is_subset (vis, might);
if (!more) // can't see anything new
// if the portal can't see anything we haven't already seen, skip it
test = select_test_set (portal, thread);
if (!mightsee_more (might, prevstack->mightsee, test, vis)) {
// can't see anything new
continue;
}
// get plane of portal, point normal into the neighbor cluster
stack.portalplane = portal->plane;