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fix bug in extrusion layer where triangulation did modify the point array as side-effect

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This commit is contained in:
Hannes Janetzek 2013-04-08 22:06:00 +02:00
parent 129a780c41
commit 02812d30f5
1 changed files with 39 additions and 20 deletions
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59
src/org/oscim/renderer/layer/ExtrusionLayer.java
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@ -18,6 +18,7 @@ import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ShortBuffer;
import org.oscim.core.GeometryBuffer;
import org.oscim.core.Tile;
import org.oscim.database.IMapDatabaseCallback.WayData;
import org.oscim.renderer.BufferObject;
@ -76,13 +77,9 @@ public class ExtrusionLayer extends Layer {
}
public void addBuildings(WayData way) {
//
// start outer ring
int outer = 0;
boolean simple = true;
int startVertex = mNumVertices;
short[] index = way.geom.index;
float[] points = way.geom.points;
float height = way.height;
float minHeight = way.minHeight;
@ -105,9 +102,19 @@ public class ExtrusionLayer extends Layer {
height *= 0.85;
minHeight *= 0.85;
int length = 0;
for (int ipos = 0, ppos = 0, n = way.geom.index.length; ipos < n; ipos++, ppos += length) {
length = way.geom.index[ipos];
int length = 0, ipos = 0, ppos = 0;
boolean complexOutline = false;
int geomIndexPos = 0;
int geomPointPos = 0;
boolean simpleOutline = true;
// current vertex id
int startVertex = mNumVertices;
for (int n = index.length; ipos < n; ipos++, ppos += length) {
length = index[ipos];
// end marker
if (length < 0)
@ -115,9 +122,12 @@ public class ExtrusionLayer extends Layer {
// start next polygon
if (length == 0) {
outer = ipos + 1;
if (complexOutline)
addRoof(startVertex, way.geom, geomIndexPos, geomPointPos);
startVertex = mNumVertices;
simple = true;
simpleOutline = true;
complexOutline = false;
continue;
}
@ -125,8 +135,8 @@ public class ExtrusionLayer extends Layer {
int len = length;
if (!MapView.enableClosePolygons) {
len -= 2;
} else if (way.geom.points[ppos] == way.geom.points[ppos + len - 2]
&& way.geom.points[ppos + 1] == way.geom.points[ppos + len - 1]) {
} else if (points[ppos] == points[ppos + len - 2]
&& points[ppos + 1] == points[ppos + len - 1]) {
// vector-tile-map does not produce implicty closed
// polygons (yet)
len -= 2;
@ -137,17 +147,23 @@ public class ExtrusionLayer extends Layer {
continue;
// check if polygon contains inner rings
if (simple && (ipos < n - 1) && (way.geom.index[ipos + 1] > 0))
simple = false;
if (simpleOutline && (ipos < n - 1) && (index[ipos + 1] > 0))
simpleOutline = false;
boolean convex = addOutline(way.geom.points, ppos, len, minHeight, height, simple);
boolean convex = addOutline(points, ppos, len, minHeight, height, simpleOutline);
if (simple && (convex || len <= 8))
if (simpleOutline && (convex || len <= 8))
addRoofSimple(startVertex, len);
else if (ipos == outer) { // add roof only once
addRoof(startVertex, way.geom.index, ipos, way.geom.points, ppos);
else if (!complexOutline) {
complexOutline = true;
// keep start postion of polygon and defer roof building
// as it modifies the geometry array.
geomIndexPos = ipos;
geomPointPos = ppos;
}
}
if (complexOutline)
addRoof(startVertex, way.geom, geomIndexPos, geomPointPos);
}
private void addRoofSimple(int startVertex, int len) {
@ -172,7 +188,10 @@ public class ExtrusionLayer extends Layer {
mCurIndices[IND_ROOF].used = i;
}
private void addRoof(int startVertex, short[] index, int ipos, float[] points, int ppos) {
private void addRoof(int startVertex, GeometryBuffer geom, int ipos, int ppos) {
short[] index = geom.index;
float[] points = geom.points;
int len = 0;
int rings = 0;