server_common/recastnavigation_v1.6.0
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Fix for detail mesh corner cases

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- fix case where thing long poly center may not be on the region
This commit is contained in:
Mikko Mononen 2014-01-19 17:49:40 +02:00
parent 65da694f50
commit 29db8cde1b
1 changed files with 53 additions and 62 deletions
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115
Recast/Source/RecastMeshDetail.cpp
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@ -751,64 +751,55 @@ static void getHeightData(const rcCompactHeightfield& chf,
// since border size offset is already removed from the polymesh vertices.
stack.resize(0);
static const int offset[9*2] =
{
0,0, -1,0, 0,1, 1,0, 0,-1, -1,-1, -1,1, 1,1, 1,-1
};
// find the center of the polygon
int pcx = 0, pcz = 0;
for (int j = 0; j < npoly; ++j)
{
pcx += (int)verts[poly[j]*3+0];
pcz += (int)verts[poly[j]*3+2];
}
pcx /= npoly;
pcz /= npoly;
// find a span with the right region around this point
// No need to check for connectivity because the region ensures it
for (int dir = 0; dir < 9; ++dir)
{
int ax = pcx + offset[dir*2+0];
int az = pcz + offset[dir*2+1];
if (ax < hp.xmin || ax >= hp.xmin+hp.width ||
az < hp.ymin || az >= hp.ymin+hp.height)
continue;
const rcCompactCell& c = chf.cells[(ax+bs)+(az+bs)*chf.width];
for (int i = (int)c.index, ni = (int)(c.index+c.count); i < ni; ++i)
{
const rcCompactSpan& s = chf.spans[i];
if (s.reg == region)
{
stack.push(ax);
stack.push(az);
stack.push(i);
break;
}
}
if (stack.size() > 0)
break;
}
// Floodfill the heightfield to get 2D height data,
// starting at center location found above as seed.
memset(hp.data, 0xff, sizeof(unsigned short)*hp.width*hp.height);
// Mark start locations.
for (int i = 0; i < stack.size(); i += 3)
// Copy the height from the same region, and mark region borders
// as seed points to fill the rest.
for (int hy = 0; hy < hp.height; hy++)
{
int cx = stack[i+0];
int cy = stack[i+1];
int ci = stack[i+2];
int idx = cx-hp.xmin+(cy-hp.ymin)*hp.width;
const rcCompactSpan& cs = chf.spans[ci];
hp.data[idx] = cs.y;
}
int y = hp.ymin + hy + bs;
for (int hx = 0; hx < hp.width; hx++)
{
int x = hp.xmin + hx + bs;
const rcCompactCell& c = chf.cells[x+y*chf.width];
for (int i = (int)c.index, ni = (int)(c.index+c.count); i < ni; ++i)
{
const rcCompactSpan& s = chf.spans[i];
if (s.reg == region)
{
// Store height
hp.data[hx + hy*hp.width] = s.y;
// If any of the neighbours is not in same region,
// add the current location as flood fill start
bool border = false;
for (int dir = 0; dir < 4; ++dir)
{
if (rcGetCon(s, dir) != RC_NOT_CONNECTED)
{
const int ax = x + rcGetDirOffsetX(dir);
const int ay = y + rcGetDirOffsetY(dir);
const int ai = (int)chf.cells[ax+ay*chf.width].index + rcGetCon(s, dir);
const rcCompactSpan& as = chf.spans[ai];
if (as.reg != region)
{
border = true;
break;
}
}
}
if (border)
{
stack.push(x);
stack.push(y);
stack.push(i);
}
break;
}
}
}
}
static const int RETRACT_SIZE = 256;
int head = 0;
@ -834,19 +825,19 @@ static void getHeightData(const rcCompactHeightfield& chf,
const int ax = cx + rcGetDirOffsetX(dir);
const int ay = cy + rcGetDirOffsetY(dir);
const int hx = ax - hp.xmin - bs;
const int hy = ay - hp.ymin - bs;
if (ax < hp.xmin || ax >= (hp.xmin+hp.width) ||
ay < hp.ymin || ay >= (hp.ymin+hp.height))
if (hx < 0 || hx >= hp.width || hy < 0 || hy >= hp.height)
continue;
if (hp.data[ax-hp.xmin+(ay-hp.ymin)*hp.width] != RC_UNSET_HEIGHT)
if (hp.data[hx + hy*hp.width] != RC_UNSET_HEIGHT)
continue;
const int ai = (int)chf.cells[(ax+bs)+(ay+bs)*chf.width].index + rcGetCon(cs, dir);
const int ai = (int)chf.cells[ax + ay*chf.width].index + rcGetCon(cs, dir);
const rcCompactSpan& as = chf.spans[ai];
int idx = ax-hp.xmin+(ay-hp.ymin)*hp.width;
hp.data[idx] = as.y;
hp.data[hx + hy*hp.width] = as.y;
stack.push(ax);
stack.push(ay);