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Fixed findOutOfRoadSector to take the height into account

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(previously incorrect quads were found in FortMagma, when
driving slightly off track beneath a different part of the
track - and while this did not affect the kart's steering
in this case, it could cause problems in other places).


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@11637 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
hikerstk 2012-09-30 13:11:07 +00:00
parent 3a3d1a5a6f
commit eaedc47ddc
1 changed files with 42 additions and 17 deletions
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25
src/tracks/quad_graph.cpp
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@ -900,6 +900,14 @@ int QuadGraph::findOutOfRoadSector(const Vec3& xyz,
int min_sector = UNKNOWN_SECTOR; int min_sector = UNKNOWN_SECTOR;
float min_dist_2 = 999999.0f*999999.0f; float min_dist_2 = 999999.0f*999999.0f;
// It is (at least theoretical) possible that a kart is falling and in
// between (or too far below) a driveline point and so it doesn't fulfill
// the height condition. So we run the test twice: first with height
// condition, then again without the height condition - just to make sure
// it always comes back with some kind of quad.
for(int phase=0; phase<2; phase++)
{
for(int j=0; j<count; j++) for(int j=0; j<count; j++)
{ {
int next_sector; int next_sector;
@ -913,12 +921,29 @@ int QuadGraph::findOutOfRoadSector(const Vec3& xyz,
// A first simple test uses the 2d distance to the center of the quad. // A first simple test uses the 2d distance to the center of the quad.
float dist_2 = m_all_nodes[next_sector]->getDistance2FromPoint(xyz); float dist_2 = m_all_nodes[next_sector]->getDistance2FromPoint(xyz);
if(dist_2<min_dist_2) if(dist_2<min_dist_2)
{
const Quad &q = getQuadOfNode(next_sector);
float dist = xyz.getY() - q.getMinHeight();
// While negative distances are unlikely, we allow some small
// negative numbers in case that the kart is partly in the
// track. Only do the height test in phase==0, in phase==1
// accept any point, independent of height.
if(phase==1 || (dist < 5.0f && dist>-1.0f) )
{ {
min_dist_2 = dist_2; min_dist_2 = dist_2;
min_sector = next_sector; min_sector = next_sector;
} }
}
current_sector = next_sector; current_sector = next_sector;
} // for j } // for j
// Leave in phase 0 if any sector was found.
if(min_sector!=UNKNOWN_SECTOR)
return min_sector;
#ifdef DEBUG
printf("findOutOfRoadSector: can't find sector with height for "
"%f %f %f\n", xyz.getX(), xyz.getY(), xyz.getZ());
#endif
} // phase
if(min_sector==UNKNOWN_SECTOR ) if(min_sector==UNKNOWN_SECTOR )
{ {