mirror of
https://github.com/Relintai/pandemonium_engine.git
synced 2024-12-30 15:47:12 +01:00
645 lines
17 KiB
C++
645 lines
17 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.
|
|
//
|
|
|
|
#include <float.h>
|
|
#define _USE_MATH_DEFINES
|
|
#include <math.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include "Recast.h"
|
|
#include "RecastAlloc.h"
|
|
#include "RecastAssert.h"
|
|
|
|
|
|
// Must be 255 or smaller (not 256) because layer IDs are stored as
|
|
// a byte where 255 is a special value.
|
|
static const int RC_MAX_LAYERS = 63;
|
|
static const int RC_MAX_NEIS = 16;
|
|
|
|
struct rcLayerRegion
|
|
{
|
|
unsigned char layers[RC_MAX_LAYERS];
|
|
unsigned char neis[RC_MAX_NEIS];
|
|
unsigned short ymin, ymax;
|
|
unsigned char layerId; // Layer ID
|
|
unsigned char nlayers; // Layer count
|
|
unsigned char nneis; // Neighbour count
|
|
unsigned char base; // Flag indicating if the region is the base of merged regions.
|
|
};
|
|
|
|
|
|
static bool contains(const unsigned char* a, const unsigned char an, const unsigned char v)
|
|
{
|
|
const int n = (int)an;
|
|
for (int i = 0; i < n; ++i)
|
|
{
|
|
if (a[i] == v)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool addUnique(unsigned char* a, unsigned char& an, int anMax, unsigned char v)
|
|
{
|
|
if (contains(a, an, v))
|
|
return true;
|
|
|
|
if ((int)an >= anMax)
|
|
return false;
|
|
|
|
a[an] = v;
|
|
an++;
|
|
return true;
|
|
}
|
|
|
|
|
|
inline bool overlapRange(const unsigned short amin, const unsigned short amax,
|
|
const unsigned short bmin, const unsigned short bmax)
|
|
{
|
|
return (amin > bmax || amax < bmin) ? false : true;
|
|
}
|
|
|
|
|
|
|
|
struct rcLayerSweepSpan
|
|
{
|
|
unsigned short ns; // number samples
|
|
unsigned char id; // region id
|
|
unsigned char nei; // neighbour id
|
|
};
|
|
|
|
/// @par
|
|
///
|
|
/// See the #rcConfig documentation for more information on the configuration parameters.
|
|
///
|
|
/// @see rcAllocHeightfieldLayerSet, rcCompactHeightfield, rcHeightfieldLayerSet, rcConfig
|
|
bool rcBuildHeightfieldLayers(rcContext* ctx, rcCompactHeightfield& chf,
|
|
const int borderSize, const int walkableHeight,
|
|
rcHeightfieldLayerSet& lset)
|
|
{
|
|
rcAssert(ctx);
|
|
|
|
rcScopedTimer timer(ctx, RC_TIMER_BUILD_LAYERS);
|
|
|
|
const int w = chf.width;
|
|
const int h = chf.height;
|
|
|
|
rcScopedDelete<unsigned char> srcReg((unsigned char*)rcAlloc(sizeof(unsigned char)*chf.spanCount, RC_ALLOC_TEMP));
|
|
if (!srcReg)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'srcReg' (%d).", chf.spanCount);
|
|
return false;
|
|
}
|
|
memset(srcReg,0xff,sizeof(unsigned char)*chf.spanCount);
|
|
|
|
const int nsweeps = chf.width;
|
|
rcScopedDelete<rcLayerSweepSpan> sweeps((rcLayerSweepSpan*)rcAlloc(sizeof(rcLayerSweepSpan)*nsweeps, RC_ALLOC_TEMP));
|
|
if (!sweeps)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'sweeps' (%d).", nsweeps);
|
|
return false;
|
|
}
|
|
|
|
|
|
// Partition walkable area into monotone regions.
|
|
int prevCount[256];
|
|
unsigned char regId = 0;
|
|
|
|
for (int y = borderSize; y < h-borderSize; ++y)
|
|
{
|
|
memset(prevCount,0,sizeof(int)*regId);
|
|
unsigned char sweepId = 0;
|
|
|
|
for (int x = borderSize; x < w-borderSize; ++x)
|
|
{
|
|
const rcCompactCell& c = chf.cells[x+y*w];
|
|
|
|
for (int i = (int)c.index, ni = (int)(c.index+c.count); i < ni; ++i)
|
|
{
|
|
const rcCompactSpan& s = chf.spans[i];
|
|
if (chf.areas[i] == RC_NULL_AREA) continue;
|
|
|
|
unsigned char sid = 0xff;
|
|
|
|
// -x
|
|
if (rcGetCon(s, 0) != RC_NOT_CONNECTED)
|
|
{
|
|
const int ax = x + rcGetDirOffsetX(0);
|
|
const int ay = y + rcGetDirOffsetY(0);
|
|
const int ai = (int)chf.cells[ax+ay*w].index + rcGetCon(s, 0);
|
|
if (chf.areas[ai] != RC_NULL_AREA && srcReg[ai] != 0xff)
|
|
sid = srcReg[ai];
|
|
}
|
|
|
|
if (sid == 0xff)
|
|
{
|
|
sid = sweepId++;
|
|
sweeps[sid].nei = 0xff;
|
|
sweeps[sid].ns = 0;
|
|
}
|
|
|
|
// -y
|
|
if (rcGetCon(s,3) != RC_NOT_CONNECTED)
|
|
{
|
|
const int ax = x + rcGetDirOffsetX(3);
|
|
const int ay = y + rcGetDirOffsetY(3);
|
|
const int ai = (int)chf.cells[ax+ay*w].index + rcGetCon(s, 3);
|
|
const unsigned char nr = srcReg[ai];
|
|
if (nr != 0xff)
|
|
{
|
|
// Set neighbour when first valid neighbour is encoutered.
|
|
if (sweeps[sid].ns == 0)
|
|
sweeps[sid].nei = nr;
|
|
|
|
if (sweeps[sid].nei == nr)
|
|
{
|
|
// Update existing neighbour
|
|
sweeps[sid].ns++;
|
|
prevCount[nr]++;
|
|
}
|
|
else
|
|
{
|
|
// This is hit if there is nore than one neighbour.
|
|
// Invalidate the neighbour.
|
|
sweeps[sid].nei = 0xff;
|
|
}
|
|
}
|
|
}
|
|
|
|
srcReg[i] = sid;
|
|
}
|
|
}
|
|
|
|
// Create unique ID.
|
|
for (int i = 0; i < sweepId; ++i)
|
|
{
|
|
// If the neighbour is set and there is only one continuous connection to it,
|
|
// the sweep will be merged with the previous one, else new region is created.
|
|
if (sweeps[i].nei != 0xff && prevCount[sweeps[i].nei] == (int)sweeps[i].ns)
|
|
{
|
|
sweeps[i].id = sweeps[i].nei;
|
|
}
|
|
else
|
|
{
|
|
if (regId == 255)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Region ID overflow.");
|
|
return false;
|
|
}
|
|
sweeps[i].id = regId++;
|
|
}
|
|
}
|
|
|
|
// Remap local sweep ids to region ids.
|
|
for (int x = borderSize; x < w-borderSize; ++x)
|
|
{
|
|
const rcCompactCell& c = chf.cells[x+y*w];
|
|
for (int i = (int)c.index, ni = (int)(c.index+c.count); i < ni; ++i)
|
|
{
|
|
if (srcReg[i] != 0xff)
|
|
srcReg[i] = sweeps[srcReg[i]].id;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Allocate and init layer regions.
|
|
const int nregs = (int)regId;
|
|
rcScopedDelete<rcLayerRegion> regs((rcLayerRegion*)rcAlloc(sizeof(rcLayerRegion)*nregs, RC_ALLOC_TEMP));
|
|
if (!regs)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'regs' (%d).", nregs);
|
|
return false;
|
|
}
|
|
memset(regs, 0, sizeof(rcLayerRegion)*nregs);
|
|
for (int i = 0; i < nregs; ++i)
|
|
{
|
|
regs[i].layerId = 0xff;
|
|
regs[i].ymin = 0xffff;
|
|
regs[i].ymax = 0;
|
|
}
|
|
|
|
// Find region neighbours and overlapping regions.
|
|
for (int y = 0; y < h; ++y)
|
|
{
|
|
for (int x = 0; x < w; ++x)
|
|
{
|
|
const rcCompactCell& c = chf.cells[x+y*w];
|
|
|
|
unsigned char lregs[RC_MAX_LAYERS];
|
|
int nlregs = 0;
|
|
|
|
for (int i = (int)c.index, ni = (int)(c.index+c.count); i < ni; ++i)
|
|
{
|
|
const rcCompactSpan& s = chf.spans[i];
|
|
const unsigned char ri = srcReg[i];
|
|
if (ri == 0xff) continue;
|
|
|
|
regs[ri].ymin = rcMin(regs[ri].ymin, s.y);
|
|
regs[ri].ymax = rcMax(regs[ri].ymax, s.y);
|
|
|
|
// Collect all region layers.
|
|
if (nlregs < RC_MAX_LAYERS)
|
|
lregs[nlregs++] = ri;
|
|
|
|
// Update neighbours
|
|
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*w].index + rcGetCon(s, dir);
|
|
const unsigned char rai = srcReg[ai];
|
|
if (rai != 0xff && rai != ri)
|
|
{
|
|
// Don't check return value -- if we cannot add the neighbor
|
|
// it will just cause a few more regions to be created, which
|
|
// is fine.
|
|
addUnique(regs[ri].neis, regs[ri].nneis, RC_MAX_NEIS, rai);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// Update overlapping regions.
|
|
for (int i = 0; i < nlregs-1; ++i)
|
|
{
|
|
for (int j = i+1; j < nlregs; ++j)
|
|
{
|
|
if (lregs[i] != lregs[j])
|
|
{
|
|
rcLayerRegion& ri = regs[lregs[i]];
|
|
rcLayerRegion& rj = regs[lregs[j]];
|
|
|
|
if (!addUnique(ri.layers, ri.nlayers, RC_MAX_LAYERS, lregs[j]) ||
|
|
!addUnique(rj.layers, rj.nlayers, RC_MAX_LAYERS, lregs[i]))
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: layer overflow (too many overlapping walkable platforms). Try increasing RC_MAX_LAYERS.");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
// Create 2D layers from regions.
|
|
unsigned char layerId = 0;
|
|
|
|
static const int MAX_STACK = 64;
|
|
unsigned char stack[MAX_STACK];
|
|
int nstack = 0;
|
|
|
|
for (int i = 0; i < nregs; ++i)
|
|
{
|
|
rcLayerRegion& root = regs[i];
|
|
// Skip already visited.
|
|
if (root.layerId != 0xff)
|
|
continue;
|
|
|
|
// Start search.
|
|
root.layerId = layerId;
|
|
root.base = 1;
|
|
|
|
nstack = 0;
|
|
stack[nstack++] = (unsigned char)i;
|
|
|
|
while (nstack)
|
|
{
|
|
// Pop front
|
|
rcLayerRegion& reg = regs[stack[0]];
|
|
nstack--;
|
|
for (int j = 0; j < nstack; ++j)
|
|
stack[j] = stack[j+1];
|
|
|
|
const int nneis = (int)reg.nneis;
|
|
for (int j = 0; j < nneis; ++j)
|
|
{
|
|
const unsigned char nei = reg.neis[j];
|
|
rcLayerRegion& regn = regs[nei];
|
|
// Skip already visited.
|
|
if (regn.layerId != 0xff)
|
|
continue;
|
|
// Skip if the neighbour is overlapping root region.
|
|
if (contains(root.layers, root.nlayers, nei))
|
|
continue;
|
|
// Skip if the height range would become too large.
|
|
const int ymin = rcMin(root.ymin, regn.ymin);
|
|
const int ymax = rcMax(root.ymax, regn.ymax);
|
|
if ((ymax - ymin) >= 255)
|
|
continue;
|
|
|
|
if (nstack < MAX_STACK)
|
|
{
|
|
// Deepen
|
|
stack[nstack++] = (unsigned char)nei;
|
|
|
|
// Mark layer id
|
|
regn.layerId = layerId;
|
|
// Merge current layers to root.
|
|
for (int k = 0; k < regn.nlayers; ++k)
|
|
{
|
|
if (!addUnique(root.layers, root.nlayers, RC_MAX_LAYERS, regn.layers[k]))
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: layer overflow (too many overlapping walkable platforms). Try increasing RC_MAX_LAYERS.");
|
|
return false;
|
|
}
|
|
}
|
|
root.ymin = rcMin(root.ymin, regn.ymin);
|
|
root.ymax = rcMax(root.ymax, regn.ymax);
|
|
}
|
|
}
|
|
}
|
|
|
|
layerId++;
|
|
}
|
|
|
|
// Merge non-overlapping regions that are close in height.
|
|
const unsigned short mergeHeight = (unsigned short)walkableHeight * 4;
|
|
|
|
for (int i = 0; i < nregs; ++i)
|
|
{
|
|
rcLayerRegion& ri = regs[i];
|
|
if (!ri.base) continue;
|
|
|
|
unsigned char newId = ri.layerId;
|
|
|
|
for (;;)
|
|
{
|
|
unsigned char oldId = 0xff;
|
|
|
|
for (int j = 0; j < nregs; ++j)
|
|
{
|
|
if (i == j) continue;
|
|
rcLayerRegion& rj = regs[j];
|
|
if (!rj.base) continue;
|
|
|
|
// Skip if the regions are not close to each other.
|
|
if (!overlapRange(ri.ymin,ri.ymax+mergeHeight, rj.ymin,rj.ymax+mergeHeight))
|
|
continue;
|
|
// Skip if the height range would become too large.
|
|
const int ymin = rcMin(ri.ymin, rj.ymin);
|
|
const int ymax = rcMax(ri.ymax, rj.ymax);
|
|
if ((ymax - ymin) >= 255)
|
|
continue;
|
|
|
|
// Make sure that there is no overlap when merging 'ri' and 'rj'.
|
|
bool overlap = false;
|
|
// Iterate over all regions which have the same layerId as 'rj'
|
|
for (int k = 0; k < nregs; ++k)
|
|
{
|
|
if (regs[k].layerId != rj.layerId)
|
|
continue;
|
|
// Check if region 'k' is overlapping region 'ri'
|
|
// Index to 'regs' is the same as region id.
|
|
if (contains(ri.layers,ri.nlayers, (unsigned char)k))
|
|
{
|
|
overlap = true;
|
|
break;
|
|
}
|
|
}
|
|
// Cannot merge of regions overlap.
|
|
if (overlap)
|
|
continue;
|
|
|
|
// Can merge i and j.
|
|
oldId = rj.layerId;
|
|
break;
|
|
}
|
|
|
|
// Could not find anything to merge with, stop.
|
|
if (oldId == 0xff)
|
|
break;
|
|
|
|
// Merge
|
|
for (int j = 0; j < nregs; ++j)
|
|
{
|
|
rcLayerRegion& rj = regs[j];
|
|
if (rj.layerId == oldId)
|
|
{
|
|
rj.base = 0;
|
|
// Remap layerIds.
|
|
rj.layerId = newId;
|
|
// Add overlaid layers from 'rj' to 'ri'.
|
|
for (int k = 0; k < rj.nlayers; ++k)
|
|
{
|
|
if (!addUnique(ri.layers, ri.nlayers, RC_MAX_LAYERS, rj.layers[k]))
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: layer overflow (too many overlapping walkable platforms). Try increasing RC_MAX_LAYERS.");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Update height bounds.
|
|
ri.ymin = rcMin(ri.ymin, rj.ymin);
|
|
ri.ymax = rcMax(ri.ymax, rj.ymax);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Compact layerIds
|
|
unsigned char remap[256];
|
|
memset(remap, 0, 256);
|
|
|
|
// Find number of unique layers.
|
|
layerId = 0;
|
|
for (int i = 0; i < nregs; ++i)
|
|
remap[regs[i].layerId] = 1;
|
|
for (int i = 0; i < 256; ++i)
|
|
{
|
|
if (remap[i])
|
|
remap[i] = layerId++;
|
|
else
|
|
remap[i] = 0xff;
|
|
}
|
|
// Remap ids.
|
|
for (int i = 0; i < nregs; ++i)
|
|
regs[i].layerId = remap[regs[i].layerId];
|
|
|
|
// No layers, return empty.
|
|
if (layerId == 0)
|
|
return true;
|
|
|
|
// Create layers.
|
|
rcAssert(lset.layers == 0);
|
|
|
|
const int lw = w - borderSize*2;
|
|
const int lh = h - borderSize*2;
|
|
|
|
// Build contracted bbox for layers.
|
|
float bmin[3], bmax[3];
|
|
rcVcopy(bmin, chf.bmin);
|
|
rcVcopy(bmax, chf.bmax);
|
|
bmin[0] += borderSize*chf.cs;
|
|
bmin[2] += borderSize*chf.cs;
|
|
bmax[0] -= borderSize*chf.cs;
|
|
bmax[2] -= borderSize*chf.cs;
|
|
|
|
lset.nlayers = (int)layerId;
|
|
|
|
lset.layers = (rcHeightfieldLayer*)rcAlloc(sizeof(rcHeightfieldLayer)*lset.nlayers, RC_ALLOC_PERM);
|
|
if (!lset.layers)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'layers' (%d).", lset.nlayers);
|
|
return false;
|
|
}
|
|
memset(lset.layers, 0, sizeof(rcHeightfieldLayer)*lset.nlayers);
|
|
|
|
|
|
// Store layers.
|
|
for (int i = 0; i < lset.nlayers; ++i)
|
|
{
|
|
unsigned char curId = (unsigned char)i;
|
|
|
|
rcHeightfieldLayer* layer = &lset.layers[i];
|
|
|
|
const int gridSize = sizeof(unsigned char)*lw*lh;
|
|
|
|
layer->heights = (unsigned char*)rcAlloc(gridSize, RC_ALLOC_PERM);
|
|
if (!layer->heights)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'heights' (%d).", gridSize);
|
|
return false;
|
|
}
|
|
memset(layer->heights, 0xff, gridSize);
|
|
|
|
layer->areas = (unsigned char*)rcAlloc(gridSize, RC_ALLOC_PERM);
|
|
if (!layer->areas)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'areas' (%d).", gridSize);
|
|
return false;
|
|
}
|
|
memset(layer->areas, 0, gridSize);
|
|
|
|
layer->cons = (unsigned char*)rcAlloc(gridSize, RC_ALLOC_PERM);
|
|
if (!layer->cons)
|
|
{
|
|
ctx->log(RC_LOG_ERROR, "rcBuildHeightfieldLayers: Out of memory 'cons' (%d).", gridSize);
|
|
return false;
|
|
}
|
|
memset(layer->cons, 0, gridSize);
|
|
|
|
// Find layer height bounds.
|
|
int hmin = 0, hmax = 0;
|
|
for (int j = 0; j < nregs; ++j)
|
|
{
|
|
if (regs[j].base && regs[j].layerId == curId)
|
|
{
|
|
hmin = (int)regs[j].ymin;
|
|
hmax = (int)regs[j].ymax;
|
|
}
|
|
}
|
|
|
|
layer->width = lw;
|
|
layer->height = lh;
|
|
layer->cs = chf.cs;
|
|
layer->ch = chf.ch;
|
|
|
|
// Adjust the bbox to fit the heightfield.
|
|
rcVcopy(layer->bmin, bmin);
|
|
rcVcopy(layer->bmax, bmax);
|
|
layer->bmin[1] = bmin[1] + hmin*chf.ch;
|
|
layer->bmax[1] = bmin[1] + hmax*chf.ch;
|
|
layer->hmin = hmin;
|
|
layer->hmax = hmax;
|
|
|
|
// Update usable data region.
|
|
layer->minx = layer->width;
|
|
layer->maxx = 0;
|
|
layer->miny = layer->height;
|
|
layer->maxy = 0;
|
|
|
|
// Copy height and area from compact heightfield.
|
|
for (int y = 0; y < lh; ++y)
|
|
{
|
|
for (int x = 0; x < lw; ++x)
|
|
{
|
|
const int cx = borderSize+x;
|
|
const int cy = borderSize+y;
|
|
const rcCompactCell& c = chf.cells[cx+cy*w];
|
|
for (int j = (int)c.index, nj = (int)(c.index+c.count); j < nj; ++j)
|
|
{
|
|
const rcCompactSpan& s = chf.spans[j];
|
|
// Skip unassigned regions.
|
|
if (srcReg[j] == 0xff)
|
|
continue;
|
|
// Skip of does nto belong to current layer.
|
|
unsigned char lid = regs[srcReg[j]].layerId;
|
|
if (lid != curId)
|
|
continue;
|
|
|
|
// Update data bounds.
|
|
layer->minx = rcMin(layer->minx, x);
|
|
layer->maxx = rcMax(layer->maxx, x);
|
|
layer->miny = rcMin(layer->miny, y);
|
|
layer->maxy = rcMax(layer->maxy, y);
|
|
|
|
// Store height and area type.
|
|
const int idx = x+y*lw;
|
|
layer->heights[idx] = (unsigned char)(s.y - hmin);
|
|
layer->areas[idx] = chf.areas[j];
|
|
|
|
// Check connection.
|
|
unsigned char portal = 0;
|
|
unsigned char con = 0;
|
|
for (int dir = 0; dir < 4; ++dir)
|
|
{
|
|
if (rcGetCon(s, dir) != RC_NOT_CONNECTED)
|
|
{
|
|
const int ax = cx + rcGetDirOffsetX(dir);
|
|
const int ay = cy + rcGetDirOffsetY(dir);
|
|
const int ai = (int)chf.cells[ax+ay*w].index + rcGetCon(s, dir);
|
|
unsigned char alid = srcReg[ai] != 0xff ? regs[srcReg[ai]].layerId : 0xff;
|
|
// Portal mask
|
|
if (chf.areas[ai] != RC_NULL_AREA && lid != alid)
|
|
{
|
|
portal |= (unsigned char)(1<<dir);
|
|
// Update height so that it matches on both sides of the portal.
|
|
const rcCompactSpan& as = chf.spans[ai];
|
|
if (as.y > hmin)
|
|
layer->heights[idx] = rcMax(layer->heights[idx], (unsigned char)(as.y - hmin));
|
|
}
|
|
// Valid connection mask
|
|
if (chf.areas[ai] != RC_NULL_AREA && lid == alid)
|
|
{
|
|
const int nx = ax - borderSize;
|
|
const int ny = ay - borderSize;
|
|
if (nx >= 0 && ny >= 0 && nx < lw && ny < lh)
|
|
con |= (unsigned char)(1<<dir);
|
|
}
|
|
}
|
|
}
|
|
|
|
layer->cons[idx] = (portal << 4) | con;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (layer->minx > layer->maxx)
|
|
layer->minx = layer->maxx = 0;
|
|
if (layer->miny > layer->maxy)
|
|
layer->miny = layer->maxy = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|