xiaoyan159/vtm
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Map tilt improvements (#718)

Browse Source
This commit is contained in:
Gustl22
2019-04-23 17:58:10 +02:00
committed by Emux
parent 149d5d9057
commit 5740290a9b
1 changed files with 27 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
vtm/src/org/oscim/map/Viewport.java
View File

@@ -4,6 +4,7 @@
* Copyright 2016 Erik Duisters
* Copyright 2017 Luca Osten
* Copyright 2018 Izumi Kawashima
* Copyright 2019 Gustl22
*
* This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
*
@@ -20,13 +21,7 @@
*/
package org.oscim.map;
import org.oscim.core.BoundingBox;
import org.oscim.core.Box;
import org.oscim.core.GeoPoint;
import org.oscim.core.MapPosition;
import org.oscim.core.MercatorProjection;
import org.oscim.core.Point;
import org.oscim.core.Tile;
import org.oscim.core.*;
import org.oscim.renderer.GLMatrix;
import org.oscim.utils.FastMath;
@@ -233,6 +228,7 @@ public class Viewport {
}
protected synchronized void unproject(float x, float y, float[] coords, int position) {
// Get point for near / opposite plane
mv[0] = x;
mv[1] = y;
mv[2] = -1;
@@ -241,6 +237,7 @@ public class Viewport {
double ny = mv[1];
double nz = mv[2];
// Get point for far plane
mv[0] = x;
mv[1] = y;
mv[2] = 1;
@@ -249,12 +246,34 @@ public class Viewport {
double fy = mv[1];
double fz = mv[2];
// Calc diffs
double dx = fx - nx;
double dy = fy - ny;
double dz = fz - nz;
double dist = -nz / dz;
double dist;
if (y > 0 && nz < dz && fz > dz) {
/* Keep far distance (y > 0), while world flips between the screen coordinates.
* Screen coordinates can't be correctly converted to map coordinates
* as map plane doesn't intersect with top screen corners.
*/
dist = 1; // Far plane
} else if (y < 0 && fz < dz && nz > dz) {
/* Keep near distance (y < 0), while world flips between the screen coordinates.
* Screen coordinates can't be correctly converted to map coordinates
* as map plane doesn't intersect with bottom screen corners.
*/
dist = 0; // Near plane
} else {
// Calc factor to get map coordinates on current distance
dist = Math.abs(-nz / dz);
if (Double.isNaN(dist) || dist > 1) {
// Limit distance as it may exceeds to infinity
dist = 1; // Far plane
}
}
// near + dist * (far - near)
coords[position + 0] = (float) (nx + dist * dx);
coords[position + 1] = (float) (ny + dist * dy);
}