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adapt building height to ground resolution

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This commit is contained in:
Hannes Janetzek 2013-04-03 14:35:24 +02:00
parent 1d2fea48cc
commit d3c31199f1
2 changed files with 25 additions and 6 deletions
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14
src/org/oscim/generator/TileGenerator.java
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@ -106,6 +106,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
private float mStrokeScale = 1.0f;
private float mLatScaleFactor;
private float mGroundResolution;
// replacement for variable value tags that should not be matched by RenderTheme
private final static Tag mTagEmptyName = new Tag(Tag.TAG_KEY_NAME, null, false);
@ -150,8 +151,15 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
setScaleStrokeWidth(mTile.zoomLevel);
// account for area changes with latitude
mLatScaleFactor = 0.5f + 0.5f * ((float) Math.sin(Math.abs(MercatorProjection
.pixelYToLatitude(mTile.pixelY, mTile.zoomLevel)) * (Math.PI / 180)));
double latitude = MercatorProjection.pixelYToLatitude(mTile.pixelY + (Tile.TILE_SIZE >> 1),
mTile.zoomLevel);
mLatScaleFactor = 0.5f + 0.5f * ((float) Math.sin(Math.abs(latitude) * (Math.PI / 180)));
mGroundResolution = (float) (Math.cos(latitude * (Math.PI / 180))
* MercatorProjection.EARTH_CIRCUMFERENCE
/ ((long) Tile.TILE_SIZE << mTile.zoomLevel));
Log.d(TAG, mTile + " " + mGroundResolution);
mTile.layers = new Layers();
@ -409,7 +417,7 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
if (mRenderBuildingModel) {
//Log.d(TAG, "add buildings: " + mTile + " " + mPriority);
if (mTile.layers.extrusionLayers == null)
mTile.layers.extrusionLayers = new ExtrusionLayer(0);
mTile.layers.extrusionLayers = new ExtrusionLayer(0, mGroundResolution);
((ExtrusionLayer) mTile.layers.extrusionLayers).addBuildings(mWay);

17
src/org/oscim/renderer/layer/ExtrusionLayer.java
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@ -58,11 +58,13 @@ public class ExtrusionLayer extends Layer {
private final static int IND_OUTLINE = 3;
public boolean compiled = false;
private final float mGroundResolution;
public ExtrusionLayer(int level) {
public ExtrusionLayer(int level, float groundResolution) {
this.type = Layer.EXTRUSION;
this.level = level;
mGroundResolution = groundResolution;
mVertices = mCurVertices = VertexPool.get();
mIndices = new VertexPoolItem[4];
@ -89,11 +91,20 @@ public class ExtrusionLayer extends Layer {
if (height == 0)
height = 12 * 100;
// 5 cm steps
float sfactor = (400f / Tile.TILE_SIZE) / 5f;
// 10 cm steps
float sfactor = 1 / 10f;
height *= sfactor;
minHeight *= sfactor;
// match height with ground resultion
// (meter per pixel)
height /= mGroundResolution;
minHeight /= mGroundResolution;
// my preference
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];