server_common/recastnavigation_v1.6.0
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fix for Issue 94:rcBuildContours fails when small area is marked near tile edge

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This commit is contained in:
Mikko Mononen 2010-07-08 14:38:53 +00:00
parent 122ee3a7a1
commit 5d91c09e00
1 changed files with 22 additions and 21 deletions
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43
Recast/Source/RecastContour.cpp
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@ -231,17 +231,36 @@ static void simplifyContour(rcIntArray& points, rcIntArray& simplified,
const float maxError, const int maxEdgeLen, const int buildFlags) const float maxError, const int maxEdgeLen, const int buildFlags)
{ {
// Add initial points. // Add initial points.
bool noConnections = true; bool hasConnections = false;
for (int i = 0; i < points.size(); i += 4) for (int i = 0; i < points.size(); i += 4)
{ {
if ((points[i+3] & RC_CONTOUR_REG_MASK) != 0) if ((points[i+3] & RC_CONTOUR_REG_MASK) != 0)
{ {
noConnections = false; hasConnections = true;
break; break;
} }
} }
if (noConnections) if (hasConnections)
{
// The contour has some portals to other regions.
// Add a new point to every location where the region changes.
for (int i = 0, ni = points.size()/4; i < ni; ++i)
{
int ii = (i+1) % ni;
const bool differentRegs = (points[i*4+3] & RC_CONTOUR_REG_MASK) != (points[ii*4+3] & RC_CONTOUR_REG_MASK);
const bool areaBorders = (points[i*4+3] & RC_AREA_BORDER) != (points[ii*4+3] & RC_AREA_BORDER);
if (differentRegs || areaBorders)
{
simplified.push(points[i*4+0]);
simplified.push(points[i*4+1]);
simplified.push(points[i*4+2]);
simplified.push(i);
}
}
}
if (simplified.size() == 0)
{ {
// If there is no connections at all, // If there is no connections at all,
// create some initial points for the simplification process. // create some initial points for the simplification process.
@ -284,24 +303,6 @@ static void simplifyContour(rcIntArray& points, rcIntArray& simplified,
simplified.push(urz); simplified.push(urz);
simplified.push(uri); simplified.push(uri);
} }
else
{
// The contour has some portals to other regions.
// Add a new point to every location where the region changes.
for (int i = 0, ni = points.size()/4; i < ni; ++i)
{
int ii = (i+1) % ni;
const bool differentRegs = (points[i*4+3] & RC_CONTOUR_REG_MASK) != (points[ii*4+3] & RC_CONTOUR_REG_MASK);
const bool areaBorders = (points[i*4+3] & RC_AREA_BORDER) != (points[ii*4+3] & RC_AREA_BORDER);
if (differentRegs || areaBorders)
{
simplified.push(points[i*4+0]);
simplified.push(points[i*4+1]);
simplified.push(points[i*4+2]);
simplified.push(i);
}
}
}
// Add points until all raw points are within // Add points until all raw points are within
// error tolerance to the simplified shape. // error tolerance to the simplified shape.