mirror of
https://github.com/Relintai/pandemonium_engine.git
synced 2024-12-28 06:37:11 +01:00
708d7d8700
In some cases Godot can generate input parameters to Recast that cause it to crash. Specifically when baking NavigationMeshes for input meshes that have axis extents less than half the NavigationMesh CellSize.
This has been fixed upstream in Recast (in 3901c5854c). Updating Godot's Recast integration fixes this crash issue in Godot as well.
(cherry picked from commit 36de150c74e8c86e204ce64dc5a2865b6aee79a7)
1551 lines
42 KiB
C++
1551 lines
42 KiB
C++
//
|
|
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would be
|
|
// appreciated but is not required.
|
|
// 2. Altered source versions must be plainly marked as such, and must not be
|
|
// misrepresented as being the original software.
|
|
// 3. This notice may not be removed or altered from any source distribution.
|
|
//
|
|
|
|
#define _USE_MATH_DEFINES
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include "Recast.h"
|
|
#include "RecastAlloc.h"
|
|
#include "RecastAssert.h"
|
|
|
|
struct rcEdge
|
|
{
|
|
unsigned short vert[2];
|
|
unsigned short polyEdge[2];
|
|
unsigned short poly[2];
|
|
};
|
|
|
|
static bool buildMeshAdjacency(unsigned short* polys, const int npolys,
|
|
const int nverts, const int vertsPerPoly)
|
|
{
|
|
// Based on code by Eric Lengyel from:
|
|
// http://www.terathon.com/code/edges.php
|
|
|
|
int maxEdgeCount = npolys*vertsPerPoly;
|
|
unsigned short* firstEdge = (unsigned short*)rcAlloc(sizeof(unsigned short)*(nverts + maxEdgeCount), RC_ALLOC_TEMP);
|
|
if (!firstEdge)
|
|
return false;
|
|
unsigned short* nextEdge = firstEdge + nverts;
|
|
int edgeCount = 0;
|
|
|
|
rcEdge* edges = (rcEdge*)rcAlloc(sizeof(rcEdge)*maxEdgeCount, RC_ALLOC_TEMP);
|
|
if (!edges)
|
|
{
|
|
rcFree(firstEdge);
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < nverts; i++)
|
|
firstEdge[i] = RC_MESH_NULL_IDX;
|
|
|
|
for (int i = 0; i < npolys; ++i)
|
|
{
|
|
unsigned short* t = &polys[i*vertsPerPoly*2];
|
|
for (int j = 0; j < vertsPerPoly; ++j)
|
|
{
|
|
if (t[j] == RC_MESH_NULL_IDX) break;
|
|
unsigned short v0 = t[j];
|
|
unsigned short v1 = (j+1 >= vertsPerPoly || t[j+1] == RC_MESH_NULL_IDX) ? t[0] : t[j+1];
|
|
if (v0 < v1)
|
|
{
|
|
rcEdge& edge = edges[edgeCount];
|
|
edge.vert[0] = v0;
|
|
edge.vert[1] = v1;
|
|
edge.poly[0] = (unsigned short)i;
|
|
edge.polyEdge[0] = (unsigned short)j;
|
|
edge.poly[1] = (unsigned short)i;
|
|
edge.polyEdge[1] = 0;
|
|
// Insert edge
|
|
nextEdge[edgeCount] = firstEdge[v0];
|
|
firstEdge[v0] = (unsigned short)edgeCount;
|
|
edgeCount++;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < npolys; ++i)
|
|
{
|
|
unsigned short* t = &polys[i*vertsPerPoly*2];
|
|
for (int j = 0; j < vertsPerPoly; ++j)
|
|
{
|
|
if (t[j] == RC_MESH_NULL_IDX) break;
|
|
unsigned short v0 = t[j];
|
|
unsigned short v1 = (j+1 >= vertsPerPoly || t[j+1] == RC_MESH_NULL_IDX) ? t[0] : t[j+1];
|
|
if (v0 > v1)
|
|
{
|
|
for (unsigned short e = firstEdge[v1]; e != RC_MESH_NULL_IDX; e = nextEdge[e])
|
|
{
|
|
rcEdge& edge = edges[e];
|
|
if (edge.vert[1] == v0 && edge.poly[0] == edge.poly[1])
|
|
{
|
|
edge.poly[1] = (unsigned short)i;
|
|
edge.polyEdge[1] = (unsigned short)j;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Store adjacency
|
|
for (int i = 0; i < edgeCount; ++i)
|
|
{
|
|
const rcEdge& e = edges[i];
|
|
if (e.poly[0] != e.poly[1])
|
|
{
|
|
unsigned short* p0 = &polys[e.poly[0]*vertsPerPoly*2];
|
|
unsigned short* p1 = &polys[e.poly[1]*vertsPerPoly*2];
|
|
p0[vertsPerPoly + e.polyEdge[0]] = e.poly[1];
|
|
p1[vertsPerPoly + e.polyEdge[1]] = e.poly[0];
|
|
}
|
|
}
|
|
|
|
rcFree(firstEdge);
|
|
rcFree(edges);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static const int VERTEX_BUCKET_COUNT = (1<<12);
|
|
|
|
inline int computeVertexHash(int x, int y, int z)
|
|
{
|
|
const unsigned int h1 = 0x8da6b343; // Large multiplicative constants;
|
|
const unsigned int h2 = 0xd8163841; // here arbitrarily chosen primes
|
|
const unsigned int h3 = 0xcb1ab31f;
|
|
unsigned int n = h1 * x + h2 * y + h3 * z;
|
|
return (int)(n & (VERTEX_BUCKET_COUNT-1));
|
|
}
|
|
|
|
static unsigned short addVertex(unsigned short x, unsigned short y, unsigned short z,
|
|
unsigned short* verts, int* firstVert, int* nextVert, int& nv)
|
|
{
|
|
int bucket = computeVertexHash(x, 0, z);
|
|
int i = firstVert[bucket];
|
|
|
|
while (i != -1)
|
|
{
|
|
const unsigned short* v = &verts[i*3];
|
|
if (v[0] == x && (rcAbs(v[1] - y) <= 2) && v[2] == z)
|
|
return (unsigned short)i;
|
|
i = nextVert[i]; // next
|
|
}
|
|
|
|
// Could not find, create new.
|
|
i = nv; nv++;
|
|
unsigned short* v = &verts[i*3];
|
|
v[0] = x;
|
|
v[1] = y;
|
|
v[2] = z;
|
|
nextVert[i] = firstVert[bucket];
|
|
firstVert[bucket] = i;
|
|
|
|
return (unsigned short)i;
|
|
}
|
|
|
|
// Last time I checked the if version got compiled using cmov, which was a lot faster than module (with idiv).
|
|
inline int prev(int i, int n) { return i-1 >= 0 ? i-1 : n-1; }
|
|
inline int next(int i, int n) { return i+1 < n ? i+1 : 0; }
|
|
|
|
inline int area2(const int* a, const int* b, const int* c)
|
|
{
|
|
return (b[0] - a[0]) * (c[2] - a[2]) - (c[0] - a[0]) * (b[2] - a[2]);
|
|
}
|
|
|
|
// Exclusive or: true iff exactly one argument is true.
|
|
// The arguments are negated to ensure that they are 0/1
|
|
// values. Then the bitwise Xor operator may apply.
|
|
// (This idea is due to Michael Baldwin.)
|
|
inline bool xorb(bool x, bool y)
|
|
{
|
|
return !x ^ !y;
|
|
}
|
|
|
|
// Returns true iff c is strictly to the left of the directed
|
|
// line through a to b.
|
|
inline bool left(const int* a, const int* b, const int* c)
|
|
{
|
|
return area2(a, b, c) < 0;
|
|
}
|
|
|
|
inline bool leftOn(const int* a, const int* b, const int* c)
|
|
{
|
|
return area2(a, b, c) <= 0;
|
|
}
|
|
|
|
inline bool collinear(const int* a, const int* b, const int* c)
|
|
{
|
|
return area2(a, b, c) == 0;
|
|
}
|
|
|
|
// Returns true iff ab properly intersects cd: they share
|
|
// a point interior to both segments. The properness of the
|
|
// intersection is ensured by using strict leftness.
|
|
static bool intersectProp(const int* a, const int* b, const int* c, const int* d)
|
|
{
|
|
// Eliminate improper cases.
|
|
if (collinear(a,b,c) || collinear(a,b,d) ||
|
|
collinear(c,d,a) || collinear(c,d,b))
|
|
return false;
|
|
|
|
return xorb(left(a,b,c), left(a,b,d)) && xorb(left(c,d,a), left(c,d,b));
|
|
}
|
|
|
|
// Returns T iff (a,b,c) are collinear and point c lies
|
|
// on the closed segement ab.
|
|
static bool between(const int* a, const int* b, const int* c)
|
|
{
|
|
if (!collinear(a, b, c))
|
|
return false;
|
|
// If ab not vertical, check betweenness on x; else on y.
|
|
if (a[0] != b[0])
|
|
return ((a[0] <= c[0]) && (c[0] <= b[0])) || ((a[0] >= c[0]) && (c[0] >= b[0]));
|
|
else
|
|
return ((a[2] <= c[2]) && (c[2] <= b[2])) || ((a[2] >= c[2]) && (c[2] >= b[2]));
|
|
}
|
|
|
|
// Returns true iff segments ab and cd intersect, properly or improperly.
|
|
static bool intersect(const int* a, const int* b, const int* c, const int* d)
|
|
{
|
|
if (intersectProp(a, b, c, d))
|
|
return true;
|
|
else if (between(a, b, c) || between(a, b, d) ||
|
|
between(c, d, a) || between(c, d, b))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
static bool vequal(const int* a, const int* b)
|
|
{
|
|
return a[0] == b[0] && a[2] == b[2];
|
|
}
|
|
|
|
// Returns T iff (v_i, v_j) is a proper internal *or* external
|
|
// diagonal of P, *ignoring edges incident to v_i and v_j*.
|
|
static bool diagonalie(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
const int* d0 = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* d1 = &verts[(indices[j] & 0x0fffffff) * 4];
|
|
|
|
// For each edge (k,k+1) of P
|
|
for (int k = 0; k < n; k++)
|
|
{
|
|
int k1 = next(k, n);
|
|
// Skip edges incident to i or j
|
|
if (!((k == i) || (k1 == i) || (k == j) || (k1 == j)))
|
|
{
|
|
const int* p0 = &verts[(indices[k] & 0x0fffffff) * 4];
|
|
const int* p1 = &verts[(indices[k1] & 0x0fffffff) * 4];
|
|
|
|
if (vequal(d0, p0) || vequal(d1, p0) || vequal(d0, p1) || vequal(d1, p1))
|
|
continue;
|
|
|
|
if (intersect(d0, d1, p0, p1))
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Returns true iff the diagonal (i,j) is strictly internal to the
|
|
// polygon P in the neighborhood of the i endpoint.
|
|
static bool inCone(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
const int* pi = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* pj = &verts[(indices[j] & 0x0fffffff) * 4];
|
|
const int* pi1 = &verts[(indices[next(i, n)] & 0x0fffffff) * 4];
|
|
const int* pin1 = &verts[(indices[prev(i, n)] & 0x0fffffff) * 4];
|
|
|
|
// If P[i] is a convex vertex [ i+1 left or on (i-1,i) ].
|
|
if (leftOn(pin1, pi, pi1))
|
|
return left(pi, pj, pin1) && left(pj, pi, pi1);
|
|
// Assume (i-1,i,i+1) not collinear.
|
|
// else P[i] is reflex.
|
|
return !(leftOn(pi, pj, pi1) && leftOn(pj, pi, pin1));
|
|
}
|
|
|
|
// Returns T iff (v_i, v_j) is a proper internal
|
|
// diagonal of P.
|
|
static bool diagonal(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
return inCone(i, j, n, verts, indices) && diagonalie(i, j, n, verts, indices);
|
|
}
|
|
|
|
|
|
static bool diagonalieLoose(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
const int* d0 = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* d1 = &verts[(indices[j] & 0x0fffffff) * 4];
|
|
|
|
// For each edge (k,k+1) of P
|
|
for (int k = 0; k < n; k++)
|
|
{
|
|
int k1 = next(k, n);
|
|
// Skip edges incident to i or j
|
|
if (!((k == i) || (k1 == i) || (k == j) || (k1 == j)))
|
|
{
|
|
const int* p0 = &verts[(indices[k] & 0x0fffffff) * 4];
|
|
const int* p1 = &verts[(indices[k1] & 0x0fffffff) * 4];
|
|
|
|
if (vequal(d0, p0) || vequal(d1, p0) || vequal(d0, p1) || vequal(d1, p1))
|
|
continue;
|
|
|
|
if (intersectProp(d0, d1, p0, p1))
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool inConeLoose(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
const int* pi = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* pj = &verts[(indices[j] & 0x0fffffff) * 4];
|
|
const int* pi1 = &verts[(indices[next(i, n)] & 0x0fffffff) * 4];
|
|
const int* pin1 = &verts[(indices[prev(i, n)] & 0x0fffffff) * 4];
|
|
|
|
// If P[i] is a convex vertex [ i+1 left or on (i-1,i) ].
|
|
if (leftOn(pin1, pi, pi1))
|
|
return leftOn(pi, pj, pin1) && leftOn(pj, pi, pi1);
|
|
// Assume (i-1,i,i+1) not collinear.
|
|
// else P[i] is reflex.
|
|
return !(leftOn(pi, pj, pi1) && leftOn(pj, pi, pin1));
|
|
}
|
|
|
|
static bool diagonalLoose(int i, int j, int n, const int* verts, int* indices)
|
|
{
|
|
return inConeLoose(i, j, n, verts, indices) && diagonalieLoose(i, j, n, verts, indices);
|
|
}
|
|
|
|
|
|
static int triangulate(int n, const int* verts, int* indices, int* tris)
|
|
{
|
|
int ntris = 0;
|
|
int* dst = tris;
|
|
|
|
// The last bit of the index is used to indicate if the vertex can be removed.
|
|
for (int i = 0; i < n; i++)
|
|
{
|
|
int i1 = next(i, n);
|
|
int i2 = next(i1, n);
|
|
if (diagonal(i, i2, n, verts, indices))
|
|
indices[i1] |= 0x80000000;
|
|
}
|
|
|
|
while (n > 3)
|
|
{
|
|
int minLen = -1;
|
|
int mini = -1;
|
|
for (int i = 0; i < n; i++)
|
|
{
|
|
int i1 = next(i, n);
|
|
if (indices[i1] & 0x80000000)
|
|
{
|
|
const int* p0 = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* p2 = &verts[(indices[next(i1, n)] & 0x0fffffff) * 4];
|
|
|
|
int dx = p2[0] - p0[0];
|
|
int dy = p2[2] - p0[2];
|
|
int len = dx*dx + dy*dy;
|
|
|
|
if (minLen < 0 || len < minLen)
|
|
{
|
|
minLen = len;
|
|
mini = i;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mini == -1)
|
|
{
|
|
// We might get here because the contour has overlapping segments, like this:
|
|
//
|
|
// A o-o=====o---o B
|
|
// / |C D| \.
|
|
// o o o o
|
|
// : : : :
|
|
// We'll try to recover by loosing up the inCone test a bit so that a diagonal
|
|
// like A-B or C-D can be found and we can continue.
|
|
minLen = -1;
|
|
mini = -1;
|
|
for (int i = 0; i < n; i++)
|
|
{
|
|
int i1 = next(i, n);
|
|
int i2 = next(i1, n);
|
|
if (diagonalLoose(i, i2, n, verts, indices))
|
|
{
|
|
const int* p0 = &verts[(indices[i] & 0x0fffffff) * 4];
|
|
const int* p2 = &verts[(indices[next(i2, n)] & 0x0fffffff) * 4];
|
|
int dx = p2[0] - p0[0];
|
|
int dy = p2[2] - p0[2];
|
|
int len = dx*dx + dy*dy;
|
|
|
|
if (minLen < 0 || len < minLen)
|
|
{
|
|
minLen = len;
|
|
mini = i;
|
|
}
|
|
}
|
|
}
|
|
if (mini == -1)
|
|
{
|
|
// The contour is messed up. This sometimes happens
|
|
// if the contour simplification is too aggressive.
|
|
return -ntris;
|
|
}
|
|
}
|
|
|
|
int i = mini;
|
|
int i1 = next(i, n);
|
|
int i2 = next(i1, n);
|
|
|
|
*dst++ = indices[i] & 0x0fffffff;
|
|
*dst++ = indices[i1] & 0x0fffffff;
|
|
*dst++ = indices[i2] & 0x0fffffff;
|
|
ntris++;
|
|
|
|
// Removes P[i1] by copying P[i+1]...P[n-1] left one index.
|
|
n--;
|
|
for (int k = i1; k < n; k++)
|
|
indices[k] = indices[k+1];
|
|
|
|
if (i1 >= n) i1 = 0;
|
|
i = prev(i1,n);
|
|
// Update diagonal flags.
|
|
if (diagonal(prev(i, n), i1, n, verts, indices))
|
|
indices[i] |= 0x80000000;
|
|
else
|
|
indices[i] &= 0x0fffffff;
|
|
|
|
if (diagonal(i, next(i1, n), n, verts, indices))
|
|
indices[i1] |= 0x80000000;
|
|
else
|
|
indices[i1] &= 0x0fffffff;
|
|
}
|
|
|
|
// Append the remaining triangle.
|
|
*dst++ = indices[0] & 0x0fffffff;
|
|
*dst++ = indices[1] & 0x0fffffff;
|
|
*dst++ = indices[2] & 0x0fffffff;
|
|
ntris++;
|
|
|
|
return ntris;
|
|
}
|
|
|
|
static int countPolyVerts(const unsigned short* p, const int nvp)
|
|
{
|
|
for (int i = 0; i < nvp; ++i)
|
|
if (p[i] == RC_MESH_NULL_IDX)
|
|
return i;
|
|
return nvp;
|
|
}
|
|
|
|
inline bool uleft(const unsigned short* a, const unsigned short* b, const unsigned short* c)
|
|
{
|
|
return ((int)b[0] - (int)a[0]) * ((int)c[2] - (int)a[2]) -
|
|
((int)c[0] - (int)a[0]) * ((int)b[2] - (int)a[2]) < 0;
|
|
}
|
|
|
|
static int getPolyMergeValue(unsigned short* pa, unsigned short* pb,
|
|
const unsigned short* verts, int& ea, int& eb,
|
|
const int nvp)
|
|
{
|
|
const int na = countPolyVerts(pa, nvp);
|
|
const int nb = countPolyVerts(pb, nvp);
|
|
|
|
// If the merged polygon would be too big, do not merge.
|
|
if (na+nb-2 > nvp)
|
|
return -1;
|
|
|
|
// Check if the polygons share an edge.
|
|
ea = -1;
|
|
eb = -1;
|
|
|
|
for (int i = 0; i < na; ++i)
|
|
{
|
|
unsigned short va0 = pa[i];
|
|
unsigned short va1 = pa[(i+1) % na];
|
|
if (va0 > va1)
|
|
rcSwap(va0, va1);
|
|
for (int j = 0; j < nb; ++j)
|
|
{
|
|
unsigned short vb0 = pb[j];
|
|
unsigned short vb1 = pb[(j+1) % nb];
|
|
if (vb0 > vb1)
|
|
rcSwap(vb0, vb1);
|
|
if (va0 == vb0 && va1 == vb1)
|
|
{
|
|
ea = i;
|
|
eb = j;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// No common edge, cannot merge.
|
|
if (ea == -1 || eb == -1)
|
|
return -1;
|
|
|
|
// Check to see if the merged polygon would be convex.
|
|
unsigned short va, vb, vc;
|
|
|
|
va = pa[(ea+na-1) % na];
|
|
vb = pa[ea];
|
|
vc = pb[(eb+2) % nb];
|
|
if (!uleft(&verts[va*3], &verts[vb*3], &verts[vc*3]))
|
|
return -1;
|
|
|
|
va = pb[(eb+nb-1) % nb];
|
|
vb = pb[eb];
|
|
vc = pa[(ea+2) % na];
|
|
if (!uleft(&verts[va*3], &verts[vb*3], &verts[vc*3]))
|
|
return -1;
|
|
|
|
va = pa[ea];
|
|
vb = pa[(ea+1)%na];
|
|
|
|
int dx = (int)verts[va*3+0] - (int)verts[vb*3+0];
|
|
int dy = (int)verts[va*3+2] - (int)verts[vb*3+2];
|
|
|
|
return dx*dx + dy*dy;
|
|
}
|
|
|
|
static void mergePolyVerts(unsigned short* pa, unsigned short* pb, int ea, int eb,
|
|
unsigned short* tmp, const int nvp)
|
|
{
|
|
const int na = countPolyVerts(pa, nvp);
|
|
const int nb = countPolyVerts(pb, nvp);
|
|
|
|
// Merge polygons.
|
|
memset(tmp, 0xff, sizeof(unsigned short)*nvp);
|
|
int n = 0;
|
|
// Add pa
|
|
for (int i = 0; i < na-1; ++i)
|
|
tmp[n++] = pa[(ea+1+i) % na];
|
|
// Add pb
|
|
for (int i = 0; i < nb-1; ++i)
|
|
tmp[n++] = pb[(eb+1+i) % nb];
|
|
|
|
memcpy(pa, tmp, sizeof(unsigned short)*nvp);
|
|
}
|
|
|
|
|
|
static void pushFront(int v, int* arr, int& an)
|
|
{
|
|
an++;
|
|
for (int i = an-1; i > 0; --i) arr[i] = arr[i-1];
|
|
arr[0] = v;
|
|
}
|
|
|
|
static void pushBack(int v, int* arr, int& an)
|
|
{
|
|
arr[an] = v;
|
|
an++;
|
|
}
|
|
|
|
static bool canRemoveVertex(rcContext* ctx, rcPolyMesh& mesh, const unsigned short rem)
|
|
{
|
|
const int nvp = mesh.nvp;
|
|
|
|
// Count number of polygons to remove.
|
|
int numTouchedVerts = 0;
|
|
int numRemainingEdges = 0;
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*nvp*2];
|
|
const int nv = countPolyVerts(p, nvp);
|
|
int numRemoved = 0;
|
|
int numVerts = 0;
|
|
for (int j = 0; j < nv; ++j)
|
|
{
|
|
if (p[j] == rem)
|
|
{
|
|
numTouchedVerts++;
|
|
numRemoved++;
|
|
}
|
|
numVerts++;
|
|
}
|
|
if (numRemoved)
|
|
{
|
|
numRemainingEdges += numVerts-(numRemoved+1);
|
|
}
|
|
}
|
|
|
|
// There would be too few edges remaining to create a polygon.
|
|
// This can happen for example when a tip of a triangle is marked
|
|
// as deletion, but there are no other polys that share the vertex.
|
|
// In this case, the vertex should not be removed.
|
|
if (numRemainingEdges <= 2)
|
|
return false;
|
|
|
|
// Find edges which share the removed vertex.
|
|
const int maxEdges = numTouchedVerts*2;
|
|
int nedges = 0;
|
|
rcScopedDelete<int> edges((int*)rcAlloc(sizeof(int)*maxEdges*3, RC_ALLOC_TEMP));
|
|
if (!edges)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "canRemoveVertex: Out of memory 'edges' (%d).", maxEdges*3);
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*nvp*2];
|
|
const int nv = countPolyVerts(p, nvp);
|
|
|
|
// Collect edges which touches the removed vertex.
|
|
for (int j = 0, k = nv-1; j < nv; k = j++)
|
|
{
|
|
if (p[j] == rem || p[k] == rem)
|
|
{
|
|
// Arrange edge so that a=rem.
|
|
int a = p[j], b = p[k];
|
|
if (b == rem)
|
|
rcSwap(a,b);
|
|
|
|
// Check if the edge exists
|
|
bool exists = false;
|
|
for (int m = 0; m < nedges; ++m)
|
|
{
|
|
int* e = &edges[m*3];
|
|
if (e[1] == b)
|
|
{
|
|
// Exists, increment vertex share count.
|
|
e[2]++;
|
|
exists = true;
|
|
}
|
|
}
|
|
// Add new edge.
|
|
if (!exists)
|
|
{
|
|
int* e = &edges[nedges*3];
|
|
e[0] = a;
|
|
e[1] = b;
|
|
e[2] = 1;
|
|
nedges++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// There should be no more than 2 open edges.
|
|
// This catches the case that two non-adjacent polygons
|
|
// share the removed vertex. In that case, do not remove the vertex.
|
|
int numOpenEdges = 0;
|
|
for (int i = 0; i < nedges; ++i)
|
|
{
|
|
if (edges[i*3+2] < 2)
|
|
numOpenEdges++;
|
|
}
|
|
if (numOpenEdges > 2)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool removeVertex(rcContext* ctx, rcPolyMesh& mesh, const unsigned short rem, const int maxTris)
|
|
{
|
|
const int nvp = mesh.nvp;
|
|
|
|
// Count number of polygons to remove.
|
|
int numRemovedVerts = 0;
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*nvp*2];
|
|
const int nv = countPolyVerts(p, nvp);
|
|
for (int j = 0; j < nv; ++j)
|
|
{
|
|
if (p[j] == rem)
|
|
numRemovedVerts++;
|
|
}
|
|
}
|
|
|
|
int nedges = 0;
|
|
rcScopedDelete<int> edges((int*)rcAlloc(sizeof(int)*numRemovedVerts*nvp*4, RC_ALLOC_TEMP));
|
|
if (!edges)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'edges' (%d).", numRemovedVerts*nvp*4);
|
|
return false;
|
|
}
|
|
|
|
int nhole = 0;
|
|
rcScopedDelete<int> hole((int*)rcAlloc(sizeof(int)*numRemovedVerts*nvp, RC_ALLOC_TEMP));
|
|
if (!hole)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'hole' (%d).", numRemovedVerts*nvp);
|
|
return false;
|
|
}
|
|
|
|
int nhreg = 0;
|
|
rcScopedDelete<int> hreg((int*)rcAlloc(sizeof(int)*numRemovedVerts*nvp, RC_ALLOC_TEMP));
|
|
if (!hreg)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'hreg' (%d).", numRemovedVerts*nvp);
|
|
return false;
|
|
}
|
|
|
|
int nharea = 0;
|
|
rcScopedDelete<int> harea((int*)rcAlloc(sizeof(int)*numRemovedVerts*nvp, RC_ALLOC_TEMP));
|
|
if (!harea)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'harea' (%d).", numRemovedVerts*nvp);
|
|
return false;
|
|
}
|
|
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*nvp*2];
|
|
const int nv = countPolyVerts(p, nvp);
|
|
bool hasRem = false;
|
|
for (int j = 0; j < nv; ++j)
|
|
if (p[j] == rem) hasRem = true;
|
|
if (hasRem)
|
|
{
|
|
// Collect edges which does not touch the removed vertex.
|
|
for (int j = 0, k = nv-1; j < nv; k = j++)
|
|
{
|
|
if (p[j] != rem && p[k] != rem)
|
|
{
|
|
int* e = &edges[nedges*4];
|
|
e[0] = p[k];
|
|
e[1] = p[j];
|
|
e[2] = mesh.regs[i];
|
|
e[3] = mesh.areas[i];
|
|
nedges++;
|
|
}
|
|
}
|
|
// Remove the polygon.
|
|
unsigned short* p2 = &mesh.polys[(mesh.npolys-1)*nvp*2];
|
|
if (p != p2)
|
|
memcpy(p,p2,sizeof(unsigned short)*nvp);
|
|
memset(p+nvp,0xff,sizeof(unsigned short)*nvp);
|
|
mesh.regs[i] = mesh.regs[mesh.npolys-1];
|
|
mesh.areas[i] = mesh.areas[mesh.npolys-1];
|
|
mesh.npolys--;
|
|
--i;
|
|
}
|
|
}
|
|
|
|
// Remove vertex.
|
|
for (int i = (int)rem; i < mesh.nverts - 1; ++i)
|
|
{
|
|
mesh.verts[i*3+0] = mesh.verts[(i+1)*3+0];
|
|
mesh.verts[i*3+1] = mesh.verts[(i+1)*3+1];
|
|
mesh.verts[i*3+2] = mesh.verts[(i+1)*3+2];
|
|
}
|
|
mesh.nverts--;
|
|
|
|
// Adjust indices to match the removed vertex layout.
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*nvp*2];
|
|
const int nv = countPolyVerts(p, nvp);
|
|
for (int j = 0; j < nv; ++j)
|
|
if (p[j] > rem) p[j]--;
|
|
}
|
|
for (int i = 0; i < nedges; ++i)
|
|
{
|
|
if (edges[i*4+0] > rem) edges[i*4+0]--;
|
|
if (edges[i*4+1] > rem) edges[i*4+1]--;
|
|
}
|
|
|
|
if (nedges == 0)
|
|
return true;
|
|
|
|
// Start with one vertex, keep appending connected
|
|
// segments to the start and end of the hole.
|
|
pushBack(edges[0], hole, nhole);
|
|
pushBack(edges[2], hreg, nhreg);
|
|
pushBack(edges[3], harea, nharea);
|
|
|
|
while (nedges)
|
|
{
|
|
bool match = false;
|
|
|
|
for (int i = 0; i < nedges; ++i)
|
|
{
|
|
const int ea = edges[i*4+0];
|
|
const int eb = edges[i*4+1];
|
|
const int r = edges[i*4+2];
|
|
const int a = edges[i*4+3];
|
|
bool add = false;
|
|
if (hole[0] == eb)
|
|
{
|
|
// The segment matches the beginning of the hole boundary.
|
|
pushFront(ea, hole, nhole);
|
|
pushFront(r, hreg, nhreg);
|
|
pushFront(a, harea, nharea);
|
|
add = true;
|
|
}
|
|
else if (hole[nhole-1] == ea)
|
|
{
|
|
// The segment matches the end of the hole boundary.
|
|
pushBack(eb, hole, nhole);
|
|
pushBack(r, hreg, nhreg);
|
|
pushBack(a, harea, nharea);
|
|
add = true;
|
|
}
|
|
if (add)
|
|
{
|
|
// The edge segment was added, remove it.
|
|
edges[i*4+0] = edges[(nedges-1)*4+0];
|
|
edges[i*4+1] = edges[(nedges-1)*4+1];
|
|
edges[i*4+2] = edges[(nedges-1)*4+2];
|
|
edges[i*4+3] = edges[(nedges-1)*4+3];
|
|
--nedges;
|
|
match = true;
|
|
--i;
|
|
}
|
|
}
|
|
|
|
if (!match)
|
|
break;
|
|
}
|
|
|
|
rcScopedDelete<int> tris((int*)rcAlloc(sizeof(int)*nhole*3, RC_ALLOC_TEMP));
|
|
if (!tris)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'tris' (%d).", nhole*3);
|
|
return false;
|
|
}
|
|
|
|
rcScopedDelete<int> tverts((int*)rcAlloc(sizeof(int)*nhole*4, RC_ALLOC_TEMP));
|
|
if (!tverts)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'tverts' (%d).", nhole*4);
|
|
return false;
|
|
}
|
|
|
|
rcScopedDelete<int> thole((int*)rcAlloc(sizeof(int)*nhole, RC_ALLOC_TEMP));
|
|
if (!thole)
|
|
{
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: Out of memory 'thole' (%d).", nhole);
|
|
return false;
|
|
}
|
|
|
|
// Generate temp vertex array for triangulation.
|
|
for (int i = 0; i < nhole; ++i)
|
|
{
|
|
const int pi = hole[i];
|
|
tverts[i*4+0] = mesh.verts[pi*3+0];
|
|
tverts[i*4+1] = mesh.verts[pi*3+1];
|
|
tverts[i*4+2] = mesh.verts[pi*3+2];
|
|
tverts[i*4+3] = 0;
|
|
thole[i] = i;
|
|
}
|
|
|
|
// Triangulate the hole.
|
|
int ntris = triangulate(nhole, &tverts[0], &thole[0], tris);
|
|
if (ntris < 0)
|
|
{
|
|
ntris = -ntris;
|
|
ctx->log(RC_LOG_WARNING, "removeVertex: triangulate() returned bad results.");
|
|
}
|
|
|
|
// Merge the hole triangles back to polygons.
|
|
rcScopedDelete<unsigned short> polys((unsigned short*)rcAlloc(sizeof(unsigned short)*(ntris+1)*nvp, RC_ALLOC_TEMP));
|
|
if (!polys)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "removeVertex: Out of memory 'polys' (%d).", (ntris+1)*nvp);
|
|
return false;
|
|
}
|
|
rcScopedDelete<unsigned short> pregs((unsigned short*)rcAlloc(sizeof(unsigned short)*ntris, RC_ALLOC_TEMP));
|
|
if (!pregs)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "removeVertex: Out of memory 'pregs' (%d).", ntris);
|
|
return false;
|
|
}
|
|
rcScopedDelete<unsigned char> pareas((unsigned char*)rcAlloc(sizeof(unsigned char)*ntris, RC_ALLOC_TEMP));
|
|
if (!pareas)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "removeVertex: Out of memory 'pareas' (%d).", ntris);
|
|
return false;
|
|
}
|
|
|
|
unsigned short* tmpPoly = &polys[ntris*nvp];
|
|
|
|
// Build initial polygons.
|
|
int npolys = 0;
|
|
memset(polys, 0xff, ntris*nvp*sizeof(unsigned short));
|
|
for (int j = 0; j < ntris; ++j)
|
|
{
|
|
int* t = &tris[j*3];
|
|
if (t[0] != t[1] && t[0] != t[2] && t[1] != t[2])
|
|
{
|
|
polys[npolys*nvp+0] = (unsigned short)hole[t[0]];
|
|
polys[npolys*nvp+1] = (unsigned short)hole[t[1]];
|
|
polys[npolys*nvp+2] = (unsigned short)hole[t[2]];
|
|
|
|
// If this polygon covers multiple region types then
|
|
// mark it as such
|
|
if (hreg[t[0]] != hreg[t[1]] || hreg[t[1]] != hreg[t[2]])
|
|
pregs[npolys] = RC_MULTIPLE_REGS;
|
|
else
|
|
pregs[npolys] = (unsigned short)hreg[t[0]];
|
|
|
|
pareas[npolys] = (unsigned char)harea[t[0]];
|
|
npolys++;
|
|
}
|
|
}
|
|
if (!npolys)
|
|
return true;
|
|
|
|
// Merge polygons.
|
|
if (nvp > 3)
|
|
{
|
|
for (;;)
|
|
{
|
|
// Find best polygons to merge.
|
|
int bestMergeVal = 0;
|
|
int bestPa = 0, bestPb = 0, bestEa = 0, bestEb = 0;
|
|
|
|
for (int j = 0; j < npolys-1; ++j)
|
|
{
|
|
unsigned short* pj = &polys[j*nvp];
|
|
for (int k = j+1; k < npolys; ++k)
|
|
{
|
|
unsigned short* pk = &polys[k*nvp];
|
|
int ea, eb;
|
|
int v = getPolyMergeValue(pj, pk, mesh.verts, ea, eb, nvp);
|
|
if (v > bestMergeVal)
|
|
{
|
|
bestMergeVal = v;
|
|
bestPa = j;
|
|
bestPb = k;
|
|
bestEa = ea;
|
|
bestEb = eb;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bestMergeVal > 0)
|
|
{
|
|
// Found best, merge.
|
|
unsigned short* pa = &polys[bestPa*nvp];
|
|
unsigned short* pb = &polys[bestPb*nvp];
|
|
mergePolyVerts(pa, pb, bestEa, bestEb, tmpPoly, nvp);
|
|
if (pregs[bestPa] != pregs[bestPb])
|
|
pregs[bestPa] = RC_MULTIPLE_REGS;
|
|
|
|
unsigned short* last = &polys[(npolys-1)*nvp];
|
|
if (pb != last)
|
|
memcpy(pb, last, sizeof(unsigned short)*nvp);
|
|
pregs[bestPb] = pregs[npolys-1];
|
|
pareas[bestPb] = pareas[npolys-1];
|
|
npolys--;
|
|
}
|
|
else
|
|
{
|
|
// Could not merge any polygons, stop.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Store polygons.
|
|
for (int i = 0; i < npolys; ++i)
|
|
{
|
|
if (mesh.npolys >= maxTris) break;
|
|
unsigned short* p = &mesh.polys[mesh.npolys*nvp*2];
|
|
memset(p,0xff,sizeof(unsigned short)*nvp*2);
|
|
for (int j = 0; j < nvp; ++j)
|
|
p[j] = polys[i*nvp+j];
|
|
mesh.regs[mesh.npolys] = pregs[i];
|
|
mesh.areas[mesh.npolys] = pareas[i];
|
|
mesh.npolys++;
|
|
if (mesh.npolys > maxTris)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "removeVertex: Too many polygons %d (max:%d).", mesh.npolys, maxTris);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// @par
|
|
///
|
|
/// @note If the mesh data is to be used to construct a Detour navigation mesh, then the upper
|
|
/// limit must be retricted to <= #DT_VERTS_PER_POLYGON.
|
|
///
|
|
/// @see rcAllocPolyMesh, rcContourSet, rcPolyMesh, rcConfig
|
|
bool rcBuildPolyMesh(rcContext* ctx, rcContourSet& cset, const int nvp, rcPolyMesh& mesh)
|
|
{
|
|
rcAssert(ctx);
|
|
|
|
rcScopedTimer timer(ctx, RC_TIMER_BUILD_POLYMESH);
|
|
|
|
rcVcopy(mesh.bmin, cset.bmin);
|
|
rcVcopy(mesh.bmax, cset.bmax);
|
|
mesh.cs = cset.cs;
|
|
mesh.ch = cset.ch;
|
|
mesh.borderSize = cset.borderSize;
|
|
mesh.maxEdgeError = cset.maxError;
|
|
|
|
int maxVertices = 0;
|
|
int maxTris = 0;
|
|
int maxVertsPerCont = 0;
|
|
for (int i = 0; i < cset.nconts; ++i)
|
|
{
|
|
// Skip null contours.
|
|
if (cset.conts[i].nverts < 3) continue;
|
|
maxVertices += cset.conts[i].nverts;
|
|
maxTris += cset.conts[i].nverts - 2;
|
|
maxVertsPerCont = rcMax(maxVertsPerCont, cset.conts[i].nverts);
|
|
}
|
|
|
|
if (maxVertices >= 0xfffe)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Too many vertices %d.", maxVertices);
|
|
return false;
|
|
}
|
|
|
|
rcScopedDelete<unsigned char> vflags((unsigned char*)rcAlloc(sizeof(unsigned char)*maxVertices, RC_ALLOC_TEMP));
|
|
if (!vflags)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'vflags' (%d).", maxVertices);
|
|
return false;
|
|
}
|
|
memset(vflags, 0, maxVertices);
|
|
|
|
mesh.verts = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxVertices*3, RC_ALLOC_PERM);
|
|
if (!mesh.verts)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'mesh.verts' (%d).", maxVertices);
|
|
return false;
|
|
}
|
|
mesh.polys = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxTris*nvp*2, RC_ALLOC_PERM);
|
|
if (!mesh.polys)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'mesh.polys' (%d).", maxTris*nvp*2);
|
|
return false;
|
|
}
|
|
mesh.regs = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxTris, RC_ALLOC_PERM);
|
|
if (!mesh.regs)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'mesh.regs' (%d).", maxTris);
|
|
return false;
|
|
}
|
|
mesh.areas = (unsigned char*)rcAlloc(sizeof(unsigned char)*maxTris, RC_ALLOC_PERM);
|
|
if (!mesh.areas)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'mesh.areas' (%d).", maxTris);
|
|
return false;
|
|
}
|
|
|
|
mesh.nverts = 0;
|
|
mesh.npolys = 0;
|
|
mesh.nvp = nvp;
|
|
mesh.maxpolys = maxTris;
|
|
|
|
memset(mesh.verts, 0, sizeof(unsigned short)*maxVertices*3);
|
|
memset(mesh.polys, 0xff, sizeof(unsigned short)*maxTris*nvp*2);
|
|
memset(mesh.regs, 0, sizeof(unsigned short)*maxTris);
|
|
memset(mesh.areas, 0, sizeof(unsigned char)*maxTris);
|
|
|
|
rcScopedDelete<int> nextVert((int*)rcAlloc(sizeof(int)*maxVertices, RC_ALLOC_TEMP));
|
|
if (!nextVert)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'nextVert' (%d).", maxVertices);
|
|
return false;
|
|
}
|
|
memset(nextVert, 0, sizeof(int)*maxVertices);
|
|
|
|
rcScopedDelete<int> firstVert((int*)rcAlloc(sizeof(int)*VERTEX_BUCKET_COUNT, RC_ALLOC_TEMP));
|
|
if (!firstVert)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'firstVert' (%d).", VERTEX_BUCKET_COUNT);
|
|
return false;
|
|
}
|
|
for (int i = 0; i < VERTEX_BUCKET_COUNT; ++i)
|
|
firstVert[i] = -1;
|
|
|
|
rcScopedDelete<int> indices((int*)rcAlloc(sizeof(int)*maxVertsPerCont, RC_ALLOC_TEMP));
|
|
if (!indices)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'indices' (%d).", maxVertsPerCont);
|
|
return false;
|
|
}
|
|
rcScopedDelete<int> tris((int*)rcAlloc(sizeof(int)*maxVertsPerCont*3, RC_ALLOC_TEMP));
|
|
if (!tris)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'tris' (%d).", maxVertsPerCont*3);
|
|
return false;
|
|
}
|
|
rcScopedDelete<unsigned short> polys((unsigned short*)rcAlloc(sizeof(unsigned short)*(maxVertsPerCont+1)*nvp, RC_ALLOC_TEMP));
|
|
if (!polys)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'polys' (%d).", maxVertsPerCont*nvp);
|
|
return false;
|
|
}
|
|
unsigned short* tmpPoly = &polys[maxVertsPerCont*nvp];
|
|
|
|
for (int i = 0; i < cset.nconts; ++i)
|
|
{
|
|
rcContour& cont = cset.conts[i];
|
|
|
|
// Skip null contours.
|
|
if (cont.nverts < 3)
|
|
continue;
|
|
|
|
// Triangulate contour
|
|
for (int j = 0; j < cont.nverts; ++j)
|
|
indices[j] = j;
|
|
|
|
int ntris = triangulate(cont.nverts, cont.verts, &indices[0], &tris[0]);
|
|
if (ntris <= 0)
|
|
{
|
|
// Bad triangulation, should not happen.
|
|
/* printf("\tconst float bmin[3] = {%ff,%ff,%ff};\n", cset.bmin[0], cset.bmin[1], cset.bmin[2]);
|
|
printf("\tconst float cs = %ff;\n", cset.cs);
|
|
printf("\tconst float ch = %ff;\n", cset.ch);
|
|
printf("\tconst int verts[] = {\n");
|
|
for (int k = 0; k < cont.nverts; ++k)
|
|
{
|
|
const int* v = &cont.verts[k*4];
|
|
printf("\t\t%d,%d,%d,%d,\n", v[0], v[1], v[2], v[3]);
|
|
}
|
|
printf("\t};\n\tconst int nverts = sizeof(verts)/(sizeof(int)*4);\n");*/
|
|
ctx->log(RC_LOG_WARNING, "rcBuildPolyMesh: Bad triangulation Contour %d.", i);
|
|
ntris = -ntris;
|
|
}
|
|
|
|
// Add and merge vertices.
|
|
for (int j = 0; j < cont.nverts; ++j)
|
|
{
|
|
const int* v = &cont.verts[j*4];
|
|
indices[j] = addVertex((unsigned short)v[0], (unsigned short)v[1], (unsigned short)v[2],
|
|
mesh.verts, firstVert, nextVert, mesh.nverts);
|
|
if (v[3] & RC_BORDER_VERTEX)
|
|
{
|
|
// This vertex should be removed.
|
|
vflags[indices[j]] = 1;
|
|
}
|
|
}
|
|
|
|
// Build initial polygons.
|
|
int npolys = 0;
|
|
memset(polys, 0xff, maxVertsPerCont*nvp*sizeof(unsigned short));
|
|
for (int j = 0; j < ntris; ++j)
|
|
{
|
|
int* t = &tris[j*3];
|
|
if (t[0] != t[1] && t[0] != t[2] && t[1] != t[2])
|
|
{
|
|
polys[npolys*nvp+0] = (unsigned short)indices[t[0]];
|
|
polys[npolys*nvp+1] = (unsigned short)indices[t[1]];
|
|
polys[npolys*nvp+2] = (unsigned short)indices[t[2]];
|
|
npolys++;
|
|
}
|
|
}
|
|
if (!npolys)
|
|
continue;
|
|
|
|
// Merge polygons.
|
|
if (nvp > 3)
|
|
{
|
|
for(;;)
|
|
{
|
|
// Find best polygons to merge.
|
|
int bestMergeVal = 0;
|
|
int bestPa = 0, bestPb = 0, bestEa = 0, bestEb = 0;
|
|
|
|
for (int j = 0; j < npolys-1; ++j)
|
|
{
|
|
unsigned short* pj = &polys[j*nvp];
|
|
for (int k = j+1; k < npolys; ++k)
|
|
{
|
|
unsigned short* pk = &polys[k*nvp];
|
|
int ea, eb;
|
|
int v = getPolyMergeValue(pj, pk, mesh.verts, ea, eb, nvp);
|
|
if (v > bestMergeVal)
|
|
{
|
|
bestMergeVal = v;
|
|
bestPa = j;
|
|
bestPb = k;
|
|
bestEa = ea;
|
|
bestEb = eb;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bestMergeVal > 0)
|
|
{
|
|
// Found best, merge.
|
|
unsigned short* pa = &polys[bestPa*nvp];
|
|
unsigned short* pb = &polys[bestPb*nvp];
|
|
mergePolyVerts(pa, pb, bestEa, bestEb, tmpPoly, nvp);
|
|
unsigned short* lastPoly = &polys[(npolys-1)*nvp];
|
|
if (pb != lastPoly)
|
|
memcpy(pb, lastPoly, sizeof(unsigned short)*nvp);
|
|
npolys--;
|
|
}
|
|
else
|
|
{
|
|
// Could not merge any polygons, stop.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Store polygons.
|
|
for (int j = 0; j < npolys; ++j)
|
|
{
|
|
unsigned short* p = &mesh.polys[mesh.npolys*nvp*2];
|
|
unsigned short* q = &polys[j*nvp];
|
|
for (int k = 0; k < nvp; ++k)
|
|
p[k] = q[k];
|
|
mesh.regs[mesh.npolys] = cont.reg;
|
|
mesh.areas[mesh.npolys] = cont.area;
|
|
mesh.npolys++;
|
|
if (mesh.npolys > maxTris)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Too many polygons %d (max:%d).", mesh.npolys, maxTris);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Remove edge vertices.
|
|
for (int i = 0; i < mesh.nverts; ++i)
|
|
{
|
|
if (vflags[i])
|
|
{
|
|
if (!canRemoveVertex(ctx, mesh, (unsigned short)i))
|
|
continue;
|
|
if (!removeVertex(ctx, mesh, (unsigned short)i, maxTris))
|
|
{
|
|
// Failed to remove vertex
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Failed to remove edge vertex %d.", i);
|
|
return false;
|
|
}
|
|
// Remove vertex
|
|
// Note: mesh.nverts is already decremented inside removeVertex()!
|
|
// Fixup vertex flags
|
|
for (int j = i; j < mesh.nverts; ++j)
|
|
vflags[j] = vflags[j+1];
|
|
--i;
|
|
}
|
|
}
|
|
|
|
// Calculate adjacency.
|
|
if (!buildMeshAdjacency(mesh.polys, mesh.npolys, mesh.nverts, nvp))
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Adjacency failed.");
|
|
return false;
|
|
}
|
|
|
|
// Find portal edges
|
|
if (mesh.borderSize > 0)
|
|
{
|
|
const int w = cset.width;
|
|
const int h = cset.height;
|
|
for (int i = 0; i < mesh.npolys; ++i)
|
|
{
|
|
unsigned short* p = &mesh.polys[i*2*nvp];
|
|
for (int j = 0; j < nvp; ++j)
|
|
{
|
|
if (p[j] == RC_MESH_NULL_IDX) break;
|
|
// Skip connected edges.
|
|
if (p[nvp+j] != RC_MESH_NULL_IDX)
|
|
continue;
|
|
int nj = j+1;
|
|
if (nj >= nvp || p[nj] == RC_MESH_NULL_IDX) nj = 0;
|
|
const unsigned short* va = &mesh.verts[p[j]*3];
|
|
const unsigned short* vb = &mesh.verts[p[nj]*3];
|
|
|
|
if ((int)va[0] == 0 && (int)vb[0] == 0)
|
|
p[nvp+j] = 0x8000 | 0;
|
|
else if ((int)va[2] == h && (int)vb[2] == h)
|
|
p[nvp+j] = 0x8000 | 1;
|
|
else if ((int)va[0] == w && (int)vb[0] == w)
|
|
p[nvp+j] = 0x8000 | 2;
|
|
else if ((int)va[2] == 0 && (int)vb[2] == 0)
|
|
p[nvp+j] = 0x8000 | 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Just allocate the mesh flags array. The user is resposible to fill it.
|
|
mesh.flags = (unsigned short*)rcAlloc(sizeof(unsigned short)*mesh.npolys, RC_ALLOC_PERM);
|
|
if (!mesh.flags)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: Out of memory 'mesh.flags' (%d).", mesh.npolys);
|
|
return false;
|
|
}
|
|
memset(mesh.flags, 0, sizeof(unsigned short) * mesh.npolys);
|
|
|
|
if (mesh.nverts > 0xffff)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: The resulting mesh has too many vertices %d (max %d). Data can be corrupted.", mesh.nverts, 0xffff);
|
|
}
|
|
if (mesh.npolys > 0xffff)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildPolyMesh: The resulting mesh has too many polygons %d (max %d). Data can be corrupted.", mesh.npolys, 0xffff);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// @see rcAllocPolyMesh, rcPolyMesh
|
|
bool rcMergePolyMeshes(rcContext* ctx, rcPolyMesh** meshes, const int nmeshes, rcPolyMesh& mesh)
|
|
{
|
|
rcAssert(ctx);
|
|
|
|
if (!nmeshes || !meshes)
|
|
return true;
|
|
|
|
rcScopedTimer timer(ctx, RC_TIMER_MERGE_POLYMESH);
|
|
|
|
mesh.nvp = meshes[0]->nvp;
|
|
mesh.cs = meshes[0]->cs;
|
|
mesh.ch = meshes[0]->ch;
|
|
rcVcopy(mesh.bmin, meshes[0]->bmin);
|
|
rcVcopy(mesh.bmax, meshes[0]->bmax);
|
|
|
|
int maxVerts = 0;
|
|
int maxPolys = 0;
|
|
int maxVertsPerMesh = 0;
|
|
for (int i = 0; i < nmeshes; ++i)
|
|
{
|
|
rcVmin(mesh.bmin, meshes[i]->bmin);
|
|
rcVmax(mesh.bmax, meshes[i]->bmax);
|
|
maxVertsPerMesh = rcMax(maxVertsPerMesh, meshes[i]->nverts);
|
|
maxVerts += meshes[i]->nverts;
|
|
maxPolys += meshes[i]->npolys;
|
|
}
|
|
|
|
mesh.nverts = 0;
|
|
mesh.verts = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxVerts*3, RC_ALLOC_PERM);
|
|
if (!mesh.verts)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'mesh.verts' (%d).", maxVerts*3);
|
|
return false;
|
|
}
|
|
|
|
mesh.npolys = 0;
|
|
mesh.polys = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxPolys*2*mesh.nvp, RC_ALLOC_PERM);
|
|
if (!mesh.polys)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'mesh.polys' (%d).", maxPolys*2*mesh.nvp);
|
|
return false;
|
|
}
|
|
memset(mesh.polys, 0xff, sizeof(unsigned short)*maxPolys*2*mesh.nvp);
|
|
|
|
mesh.regs = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxPolys, RC_ALLOC_PERM);
|
|
if (!mesh.regs)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'mesh.regs' (%d).", maxPolys);
|
|
return false;
|
|
}
|
|
memset(mesh.regs, 0, sizeof(unsigned short)*maxPolys);
|
|
|
|
mesh.areas = (unsigned char*)rcAlloc(sizeof(unsigned char)*maxPolys, RC_ALLOC_PERM);
|
|
if (!mesh.areas)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'mesh.areas' (%d).", maxPolys);
|
|
return false;
|
|
}
|
|
memset(mesh.areas, 0, sizeof(unsigned char)*maxPolys);
|
|
|
|
mesh.flags = (unsigned short*)rcAlloc(sizeof(unsigned short)*maxPolys, RC_ALLOC_PERM);
|
|
if (!mesh.flags)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'mesh.flags' (%d).", maxPolys);
|
|
return false;
|
|
}
|
|
memset(mesh.flags, 0, sizeof(unsigned short)*maxPolys);
|
|
|
|
rcScopedDelete<int> nextVert((int*)rcAlloc(sizeof(int)*maxVerts, RC_ALLOC_TEMP));
|
|
if (!nextVert)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'nextVert' (%d).", maxVerts);
|
|
return false;
|
|
}
|
|
memset(nextVert, 0, sizeof(int)*maxVerts);
|
|
|
|
rcScopedDelete<int> firstVert((int*)rcAlloc(sizeof(int)*VERTEX_BUCKET_COUNT, RC_ALLOC_TEMP));
|
|
if (!firstVert)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'firstVert' (%d).", VERTEX_BUCKET_COUNT);
|
|
return false;
|
|
}
|
|
for (int i = 0; i < VERTEX_BUCKET_COUNT; ++i)
|
|
firstVert[i] = -1;
|
|
|
|
rcScopedDelete<unsigned short> vremap((unsigned short*)rcAlloc(sizeof(unsigned short)*maxVertsPerMesh, RC_ALLOC_PERM));
|
|
if (!vremap)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Out of memory 'vremap' (%d).", maxVertsPerMesh);
|
|
return false;
|
|
}
|
|
memset(vremap, 0, sizeof(unsigned short)*maxVertsPerMesh);
|
|
|
|
for (int i = 0; i < nmeshes; ++i)
|
|
{
|
|
const rcPolyMesh* pmesh = meshes[i];
|
|
|
|
const unsigned short ox = (unsigned short)floorf((pmesh->bmin[0]-mesh.bmin[0])/mesh.cs+0.5f);
|
|
const unsigned short oz = (unsigned short)floorf((pmesh->bmin[2]-mesh.bmin[2])/mesh.cs+0.5f);
|
|
|
|
bool isMinX = (ox == 0);
|
|
bool isMinZ = (oz == 0);
|
|
bool isMaxX = ((unsigned short)floorf((mesh.bmax[0] - pmesh->bmax[0]) / mesh.cs + 0.5f)) == 0;
|
|
bool isMaxZ = ((unsigned short)floorf((mesh.bmax[2] - pmesh->bmax[2]) / mesh.cs + 0.5f)) == 0;
|
|
bool isOnBorder = (isMinX || isMinZ || isMaxX || isMaxZ);
|
|
|
|
for (int j = 0; j < pmesh->nverts; ++j)
|
|
{
|
|
unsigned short* v = &pmesh->verts[j*3];
|
|
vremap[j] = addVertex(v[0]+ox, v[1], v[2]+oz,
|
|
mesh.verts, firstVert, nextVert, mesh.nverts);
|
|
}
|
|
|
|
for (int j = 0; j < pmesh->npolys; ++j)
|
|
{
|
|
unsigned short* tgt = &mesh.polys[mesh.npolys*2*mesh.nvp];
|
|
unsigned short* src = &pmesh->polys[j*2*mesh.nvp];
|
|
mesh.regs[mesh.npolys] = pmesh->regs[j];
|
|
mesh.areas[mesh.npolys] = pmesh->areas[j];
|
|
mesh.flags[mesh.npolys] = pmesh->flags[j];
|
|
mesh.npolys++;
|
|
for (int k = 0; k < mesh.nvp; ++k)
|
|
{
|
|
if (src[k] == RC_MESH_NULL_IDX) break;
|
|
tgt[k] = vremap[src[k]];
|
|
}
|
|
|
|
if (isOnBorder)
|
|
{
|
|
for (int k = mesh.nvp; k < mesh.nvp * 2; ++k)
|
|
{
|
|
if (src[k] & 0x8000 && src[k] != 0xffff)
|
|
{
|
|
unsigned short dir = src[k] & 0xf;
|
|
switch (dir)
|
|
{
|
|
case 0: // Portal x-
|
|
if (isMinX)
|
|
tgt[k] = src[k];
|
|
break;
|
|
case 1: // Portal z+
|
|
if (isMaxZ)
|
|
tgt[k] = src[k];
|
|
break;
|
|
case 2: // Portal x+
|
|
if (isMaxX)
|
|
tgt[k] = src[k];
|
|
break;
|
|
case 3: // Portal z-
|
|
if (isMinZ)
|
|
tgt[k] = src[k];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Calculate adjacency.
|
|
if (!buildMeshAdjacency(mesh.polys, mesh.npolys, mesh.nverts, mesh.nvp))
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: Adjacency failed.");
|
|
return false;
|
|
}
|
|
|
|
if (mesh.nverts > 0xffff)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: The resulting mesh has too many vertices %d (max %d). Data can be corrupted.", mesh.nverts, 0xffff);
|
|
}
|
|
if (mesh.npolys > 0xffff)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcMergePolyMeshes: The resulting mesh has too many polygons %d (max %d). Data can be corrupted.", mesh.npolys, 0xffff);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool rcCopyPolyMesh(rcContext* ctx, const rcPolyMesh& src, rcPolyMesh& dst)
|
|
{
|
|
rcAssert(ctx);
|
|
|
|
// Destination must be empty.
|
|
rcAssert(dst.verts == 0);
|
|
rcAssert(dst.polys == 0);
|
|
rcAssert(dst.regs == 0);
|
|
rcAssert(dst.areas == 0);
|
|
rcAssert(dst.flags == 0);
|
|
|
|
dst.nverts = src.nverts;
|
|
dst.npolys = src.npolys;
|
|
dst.maxpolys = src.npolys;
|
|
dst.nvp = src.nvp;
|
|
rcVcopy(dst.bmin, src.bmin);
|
|
rcVcopy(dst.bmax, src.bmax);
|
|
dst.cs = src.cs;
|
|
dst.ch = src.ch;
|
|
dst.borderSize = src.borderSize;
|
|
dst.maxEdgeError = src.maxEdgeError;
|
|
|
|
dst.verts = (unsigned short*)rcAlloc(sizeof(unsigned short)*src.nverts*3, RC_ALLOC_PERM);
|
|
if (!dst.verts)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcCopyPolyMesh: Out of memory 'dst.verts' (%d).", src.nverts*3);
|
|
return false;
|
|
}
|
|
memcpy(dst.verts, src.verts, sizeof(unsigned short)*src.nverts*3);
|
|
|
|
dst.polys = (unsigned short*)rcAlloc(sizeof(unsigned short)*src.npolys*2*src.nvp, RC_ALLOC_PERM);
|
|
if (!dst.polys)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcCopyPolyMesh: Out of memory 'dst.polys' (%d).", src.npolys*2*src.nvp);
|
|
return false;
|
|
}
|
|
memcpy(dst.polys, src.polys, sizeof(unsigned short)*src.npolys*2*src.nvp);
|
|
|
|
dst.regs = (unsigned short*)rcAlloc(sizeof(unsigned short)*src.npolys, RC_ALLOC_PERM);
|
|
if (!dst.regs)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcCopyPolyMesh: Out of memory 'dst.regs' (%d).", src.npolys);
|
|
return false;
|
|
}
|
|
memcpy(dst.regs, src.regs, sizeof(unsigned short)*src.npolys);
|
|
|
|
dst.areas = (unsigned char*)rcAlloc(sizeof(unsigned char)*src.npolys, RC_ALLOC_PERM);
|
|
if (!dst.areas)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcCopyPolyMesh: Out of memory 'dst.areas' (%d).", src.npolys);
|
|
return false;
|
|
}
|
|
memcpy(dst.areas, src.areas, sizeof(unsigned char)*src.npolys);
|
|
|
|
dst.flags = (unsigned short*)rcAlloc(sizeof(unsigned short)*src.npolys, RC_ALLOC_PERM);
|
|
if (!dst.flags)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcCopyPolyMesh: Out of memory 'dst.flags' (%d).", src.npolys);
|
|
return false;
|
|
}
|
|
memcpy(dst.flags, src.flags, sizeof(unsigned short)*src.npolys);
|
|
|
|
return true;
|
|
}
|