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combine mStrokeScale and mLineScaleFactor

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This commit is contained in:
Hannes Janetzek 2013-09-19 22:46:34 +02:00
parent d91402da3c
commit 1a4e3b4c7c
1 changed files with 10 additions and 19 deletions
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29
vtm/src/org/oscim/layers/tile/vector/VectorTileLoader.java
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@ -83,7 +83,6 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
private int mDrawingLayer;
private float mStrokeScale = 1.0f;
private float mLineScaleFactor;
private float mGroundResolution;
private Tag mTagName;
@ -115,24 +114,14 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
mTile = mapTile;
if (mTile.layers != null) {
// should be fixed now.
Log.d(TAG, "BUG tile already loaded " + mTile + " " + mTile.getState());
mTile = null;
return false;
}
setScaleStrokeWidth(mTile.zoomLevel);
// account for area changes with latitude
double lat = MercatorProjection.toLatitude(mTile.y);
// scale line width relative to latitude
mLineScaleFactor = 0.4f + 0.6f * ((float) Math.sin(Math.abs(lat) * (Math.PI / 180)));
setScaleStrokeWidth(mTile.zoomLevel, lat);
mGroundResolution = (float) (Math.cos(lat * (Math.PI / 180))
* MercatorProjection.EARTH_CIRCUMFERENCE
/ ((long) Tile.SIZE << mTile.zoomLevel));
* MercatorProjection.EARTH_CIRCUMFERENCE
/ ((long) Tile.SIZE << mTile.zoomLevel));
mTile.layers = new ElementLayers();
@ -181,10 +170,14 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
* the zoom level for which the scale stroke factor should be
* set.
*/
private void setScaleStrokeWidth(byte zoomLevel) {
private void setScaleStrokeWidth(byte zoomLevel, double latitude) {
mStrokeScale = (float) Math.pow(STROKE_INCREASE, zoomLevel - STROKE_MIN_ZOOM_LEVEL);
if (mStrokeScale < 1)
mStrokeScale = 1;
// scale line width relative to latitude
mStrokeScale *= 0.4f + 0.6f * ((float) Math.sin(Math.abs(latitude) * (Math.PI / 180)));
}
public void setTileDataSource(ITileDataSource mapDatabase) {
@ -333,7 +326,6 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
float w = line.width;
if (!line.fixed) {
w *= mStrokeScale;
w *= mLineScaleFactor;
}
lineLayer.width = w;
}
@ -344,7 +336,7 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
}
lineLayer.addLine(mElement.points, mElement.index,
mElement.type == GeometryType.POLY);
mElement.type == GeometryType.POLY);
// keep reference for outline layer
mCurLineLayer = lineLayer;
@ -361,7 +353,6 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
float w = line.width;
if (!line.fixed) {
w *= mStrokeScale;
w *= mLineScaleFactor;
}
lineLayer.width = w;
}
@ -446,7 +437,7 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
break;
WayDecorator.renderText(mClipper, mElement.points, value, text,
offset, length, mTile);
offset, length, mTile);
offset += length;
}
}