server_common/recastnavigation_v1.6.0
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Document detail triangle edge flags

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This commit is contained in:
Jakob Botsch Nielsen 2019-03-16 14:58:34 +01:00
parent 21f48fae37
commit 33a9eb1cce
3 changed files with 21 additions and 3 deletions
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4
DebugUtils/Source/DetourDebugDraw.cpp
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@ -101,7 +101,9 @@ static void drawPolyBoundaries(duDebugDraw* dd, const dtMeshTile* tile,
}
for (int m = 0, n = 2; m < 3; n=m++)
{
if (((t[3] >> (n*2)) & 0x3) == 0) continue; // Skip inner detail edges.
if ((dtGetDetailTriEdgeFlags(t[3], n) & DT_DETAIL_EDGE_BOUNDARY) == 0)
continue;
if (distancePtLine2d(tv[n],v0,v1) < thr &&
distancePtLine2d(tv[m],v0,v1) < thr)
{

17
Detour/Include/DetourNavMesh.h
View File

@ -130,6 +130,11 @@ enum dtRaycastOptions
DT_RAYCAST_USE_COSTS = 0x01, ///< Raycast should calculate movement cost along the ray and fill RaycastHit::cost
};
enum dtDetailTriEdgeFlags
{
DT_DETAIL_EDGE_BOUNDARY = 0x01, ///< Detail triangle edge is part of the poly boundary
};
/// Limit raycasting during any angle pahfinding
/// The limit is given as a multiple of the character radius
@ -287,7 +292,8 @@ struct dtMeshTile
/// The detail mesh's unique vertices. [(x, y, z) * dtMeshHeader::detailVertCount]
float* detailVerts;
/// The detail mesh's triangles. [(vertA, vertB, vertC) * dtMeshHeader::detailTriCount]
/// The detail mesh's triangles. [(vertA, vertB, vertC, triFlags) * dtMeshHeader::detailTriCount].
/// See dtDetailTriEdgeFlags and dtGetDetailTriEdgeFlags.
unsigned char* detailTris;
/// The tile bounding volume nodes. [Size: dtMeshHeader::bvNodeCount]
@ -305,6 +311,15 @@ private:
dtMeshTile& operator=(const dtMeshTile&);
};
/// Get flags for edge in detail triangle.
/// @param triFlags[in] The flags for the triangle (last component of detail vertices above).
/// @param edgeIndex[in] The index of the first vertex of the edge. For instance, if 0,
/// returns flags for edge AB.
inline int dtGetDetailTriEdgeFlags(unsigned char triFlags, int edgeIndex)
{
return (triFlags >> (edgeIndex * 2)) & 0x3;
}
/// Configuration parameters used to define multi-tile navigation meshes.
/// The values are used to allocate space during the initialization of a navigation mesh.
/// @see dtNavMesh::init()

3
Recast/Source/RecastMeshDetail.cpp
View File

@ -1141,7 +1141,8 @@ static void getHeightData(rcContext* ctx, const rcCompactHeightfield& chf,
static unsigned char getEdgeFlags(const float* va, const float* vb,
const float* vpoly, const int npoly)
{
// Return true if edge (va,vb) is part of the polygon.
// The flag returned by this function matches dtDetailTriEdgeFlags in Detour.
// Figure out if edge (va,vb) is part of the polygon boundary.
static const float thrSqr = rcSqr(0.001f);
for (int i = 0, j = npoly-1; i < npoly; j=i++)
{