added MapLensOverlay

src/org/oscim/renderer/PolygonRenderer.java

@@ -294,7 +294,7 @@ public final class PolygonRenderer {
 		}
 	}
 
-	public static void drawOver(Matrices m) {
+	public static void drawOver(Matrices m, boolean drawColor, int color) {
 		if (GLState.useProgram(polygonProgram)) {
 
 			GLState.enableVertexArrays(hPolygonVertexPosition, -1);
@@ -310,9 +310,13 @@ public final class PolygonRenderer {
 		 * a quad with func 'always' and op 'zero'
 		 */
 
-		// disable drawing to framebuffer (will be re-enabled in fill)
-		glColorMask(false, false, false, false);
-
+		if (drawColor) {
+			GlUtils.setColor(hPolygonColor, color, 1);
+			GLState.blend(true);
+		} else {
+			// disable drawing to framebuffer (will be re-enabled in fill)
+			glColorMask(false, false, false, false);
+		}
 		// always pass stencil test:
 		glStencilFunc(GL_ALWAYS, 0x00, 0x00);
 		// write to all bits
@@ -321,7 +325,9 @@ public final class PolygonRenderer {
 		glStencilOp(GLES20.GL_KEEP, GLES20.GL_KEEP, GLES20.GL_ZERO);
 
 		glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-		glColorMask(true, true, true, true);
+
+		if (!drawColor)
+			glColorMask(true, true, true, true);
 	}
 
 	private static float[] debugFillColor = { 0.3f, 0.0f, 0.0f, 0.3f };

src/org/oscim/renderer/TileRenderer.java

@@ -22,6 +22,7 @@ import org.oscim.core.MapPosition;
 import org.oscim.renderer.GLRenderer.Matrices;
 import org.oscim.renderer.layer.Layer;
 import org.oscim.utils.FastMath;
+import org.oscim.utils.Matrix4;
 
 import android.opengl.GLES20;
 
@@ -44,10 +45,17 @@ public class TileRenderer {
 
 	private static Matrices mMatrices;
 
+	private static final Matrix4 mProjMatrix = new Matrix4();
+
 	static void draw(MapTile[] tiles, int tileCnt, MapPosition pos, Matrices m) {
 		mDrawCnt = 0;
 		mMatrices = m;
 
+		mProjMatrix.copy(m.viewproj);
+		// discard z projection from tilt
+		mProjMatrix.setValue(10, 0);
+		mProjMatrix.setValue(14, 0);
+
 		GLES20.glDepthFunc(GLES20.GL_LESS);
 
 		// load texture for line caps
@@ -116,11 +124,11 @@ public class TileRenderer {
 		Matrices m = mMatrices;
 		m.mvp.setTransScale(x * scale, y * scale, scale / GLRenderer.COORD_SCALE);
 
-		m.mvp.multiplyMM(m.viewproj, m.mvp);
+		m.mvp.multiplyMM(mProjMatrix, m.mvp);
 
 		// set depth offset (used for clipping to tile boundaries)
 		GLES20.glPolygonOffset(1, mDrawCnt++);
-		if (mDrawCnt > 20)
+		if (mDrawCnt == 100)
 			mDrawCnt = 0;
 
 		// simple line shader does not take forward shortening into account
@@ -160,7 +168,7 @@ public class TileRenderer {
 		}
 
 		// clear clip-region and could also draw 'fade-effect'
-		PolygonRenderer.drawOver(m);
+		PolygonRenderer.drawOver(m, true, 0x22000000);
 	}
 
 	private static int drawProxyChild(MapTile tile, MapPosition pos) {