reworking the gl projection/unprojection stuff
This commit is contained in:
Hannes Janetzek
@@ -26,6 +26,7 @@ import org.oscim.core.MapPosition;
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import org.oscim.core.MercatorProjection;
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import org.oscim.core.Tile;
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import org.oscim.utils.FastMath;
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import org.oscim.utils.GeometryUtils.Point2D;
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import android.graphics.Point;
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import android.opengl.Matrix;
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@@ -46,7 +47,7 @@ public class MapViewPosition {
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public final static int MAX_ZOOMLEVEL = 17;
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public final static int MIN_ZOOMLEVEL = 2;
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private final static float MAX_ANGLE = 40;
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private final static float MAX_ANGLE = 42;
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private final MapView mMapView;
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@@ -86,11 +87,25 @@ public class MapViewPosition {
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private float[] mRotMatrix = new float[16];
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private float[] mTmpMatrix = new float[16];
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private static int mHeight, mWidth;
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public final static float VIEW_SCALE = 1f / 4;
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public final static float VIEW_DISTANCE = 1;
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public final static float VIEW_NEAR = VIEW_DISTANCE;
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public final static float VIEW_FAR = VIEW_DISTANCE * 4;
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// only use in synchronized functions!
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Point2D mMovePoint = new Point2D();
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private static float mHeight, mWidth;
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// public final static float VIEW_SCALE = 1 / 4f;
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// public final static float VIEW_DISTANCE = 2f;
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// public final static float VIEW_NEAR = 1;
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// public final static float VIEW_FAR = 4;
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// public final static float VIEW_SCALE = 1 / 3f;
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// public final static float VIEW_DISTANCE = 2.7f;
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// public final static float VIEW_NEAR = 2;
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// public final static float VIEW_FAR = 4;
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public final static float VIEW_SCALE = 1 / 4f;
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public final static float VIEW_DISTANCE = 3.0f;
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public final static float VIEW_NEAR = 2;
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public final static float VIEW_FAR = 8;
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void setViewport(int width, int height) {
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float sw = VIEW_SCALE;
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@@ -101,11 +116,27 @@ public class MapViewPosition {
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aspect * sh, -aspect * sh, VIEW_NEAR, VIEW_FAR);
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Matrix.setIdentityM(mTmpMatrix, 0);
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Matrix.translateM(mTmpMatrix, 0, 0, 0, -VIEW_DISTANCE * 2);
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Matrix.translateM(mTmpMatrix, 0, 0, 0, -VIEW_DISTANCE);
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Matrix.multiplyMM(mProjMatrix, 0, mProjMatrix, 0, mTmpMatrix, 0);
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Matrix.invertM(mProjMatrixI, 0, mProjMatrix, 0);
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mv[0] = 0;
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mv[1] = 1;
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mv[2] = 0;
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mv[3] = 1;
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Matrix.multiplyMV(mv, 0, mProjMatrixI, 0, mv, 0);
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Log.d(TAG, " " + mv[0] + " " + mv[1] + " " + mv[2]);
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Log.d(TAG, " " + mv[0] / mv[3] + " " + mv[1] / mv[3] + " " + mv[2] / mv[3]);
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mv[0] = 0;
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mv[1] = 1;
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mv[2] = 1;
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mv[3] = 1;
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Matrix.multiplyMV(mv, 0, mProjMatrixI, 0, mv, 0);
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Log.d(TAG, " " + mv[0] + " " + mv[1] + " " + mv[2]);
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Log.d(TAG, " " + mv[0] / mv[3] + " " + mv[1] / mv[3] + " " + mv[2] / mv[3]);
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mHeight = height;
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mWidth = width;
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@@ -143,16 +174,72 @@ public class MapViewPosition {
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if (coords == null)
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return true;
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float tilt = getZ(1);
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// float tilt = getZ(1);
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unproject(-1, 1, tilt, coords, 0); // bottom-left
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unproject(1, 1, tilt, coords, 2); // bottom-right
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unproject(1, -1, -tilt, coords, 4); // top-right
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unproject(-1, -1, -tilt, coords, 6); // top-left
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float t = getZ2(1);
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float t2 = getZ2(-1);
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//Log.d(TAG, "t:" + mTilt + " z: " + tilt + " -> " + t + " " + t2);
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//
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// unproject(-1, 1, tilt, coords, 0); // bottom-left
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// unproject(1, 1, tilt, coords, 2); // bottom-right
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// unproject(1, -1, -tilt, coords, 4); // top-right
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// unproject(-1, -1, -tilt, coords, 6); // top-left
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unproject2(-1, 1, t2, coords, 4); // bottom-left
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unproject2(1, 1, t2, coords, 6); // bottom-right
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unproject2(1, -1, t, coords, 0); // top-right
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unproject2(-1, -1, t, coords, 2); // top-left
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// Log.d(TAG, "" + coords[0] + ":" + coords[1] + ", " + coords[2] + ":" + coords[3] + ", "
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// + ", " + coords[4] + ":" + coords[5] + ", " + ", " + coords[6] + ":" + coords[7]);
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return true;
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}
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private float getZ2(float y) {
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mv[0] = 0;
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mv[1] = y;
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mv[2] = -0.1f; //FIXME! please
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mv[3] = 1;
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Matrix.setRotateM(mTmpMatrix, 0, mTilt, 1, 0, 0);
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Matrix.multiplyMV(mv, 0, mTmpMatrix, 0, mv, 0);
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Matrix.multiplyMV(mv, 0, mProjMatrix, 0, mv, 0);
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//d = d / (VIEW_FAR - VIEW_NEAR);
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//Log.d(TAG, " > " + mv[2] / mv[3] + " (" + mv[2] + " " + mv[3] + ")");
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float d = mv[2] / mv[3];
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Matrix.multiplyMV(mv, 0, mUnprojMatrix, 0, mv, 0);
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//Log.d(TAG, " < " + mv[2] / mv[3] + " (" + mv[2] + " " + mv[3] + ")");
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return d;
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}
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private void unproject2(float x, float y, float z, float[] coords, int position) {
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mv[0] = x;
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mv[1] = y;
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mv[2] = z;
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mv[3] = 1;
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//float a = (float) Math.sqrt(x * x + y * y + z * z + 1);
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// mv[0] /= a;
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// mv[1] /= a;
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// mv[2] /= a;
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//mv[3] = a;
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Matrix.multiplyMV(mv, 0, mUnprojMatrix, 0, mv, 0);
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if (mv[3] != 0) {
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coords[position] = mv[0] / mv[3];
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coords[position + 1] = (mv[1] / mv[3]);
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} else {
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// else what?
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Log.d(TAG, "uproject failed");
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}
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}
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/** @return the current center point of the MapView. */
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public synchronized GeoPoint getMapCenter() {
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return new GeoPoint(mLatitude, mLongitude);
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@@ -188,11 +275,19 @@ public class MapViewPosition {
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float[] coords = mBBoxCoords;
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float tilt = getZ(1);
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unproject(-1, 1, -tilt, coords, 0); // top-left
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unproject(1, 1, -tilt, coords, 2); // top-right
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unproject(1, -1, tilt, coords, 4); // bottom-right
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unproject(-1, -1, tilt, coords, 6); // bottom-left
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// float tilt = getZ(1);
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float t = getZ(1);
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float t2 = getZ(-1);
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// unproject(-1, 1, -tilt, coords, 0); // top-left
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// unproject(1, 1, -tilt, coords, 2); // top-right
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// unproject(1, -1, tilt, coords, 4); // bottom-right
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// unproject(-1, -1, tilt, coords, 6); // bottom-left
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unproject2(-1, 1, t2, coords, 4); // bottom-left
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unproject2(1, 1, t2, coords, 6); // bottom-right
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unproject2(1, -1, t, coords, 0); // top-right
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unproject2(-1, -1, t, coords, 2); // top-left
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byte z = mZoomLevel;
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double dx, dy;
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@@ -237,7 +332,7 @@ public class MapViewPosition {
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//* 1.3f // for dist = 2
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//* 0.8f // for dist = 4
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* 0.5f
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* ((float) mHeight / mWidth) * y;
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* (mHeight / mWidth) * y;
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}
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/**
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@@ -254,10 +349,11 @@ public class MapViewPosition {
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float mx = ((mWidth / 2) - x) / (mWidth / 2);
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float my = ((mHeight / 2) - y) / (mHeight / 2);
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unproject(-mx, my, getZ(my), mu, 0);
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unproject2(-mx, my, getZ2(-my), mu, 0);
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out.x = (int) (mPosX + mu[0] / mScale);
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out.y = (int) (mPosY + mu[1] / mScale);
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Log.d(">>>", "getScreenPointOnMap " + reuse);
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return out;
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}
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@@ -272,7 +368,7 @@ public class MapViewPosition {
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float mx = ((mWidth / 2) - x) / (mWidth / 2);
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float my = ((mHeight / 2) - y) / (mHeight / 2);
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unproject(-mx, my, getZ(my), mu, 0);
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unproject2(-mx, my, getZ2(-my), mu, 0);
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double dx = mPosX + mu[0] / mScale;
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double dy = mPosY + mu[1] / mScale;
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@@ -281,7 +377,7 @@ public class MapViewPosition {
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MercatorProjection.pixelYToLatitude(dy, mZoomLevel),
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MercatorProjection.pixelXToLongitude(dx, mZoomLevel));
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// Log.d(">>>", "fromScreenPixels " + p);
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Log.d(">>>", "fromScreenPixels " + p);
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return p;
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}
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@@ -385,7 +481,6 @@ public class MapViewPosition {
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// Matrix.multiplyMM(mViewMatrix, 0, mTmpMatrix, 0, mViewMatrix, 0);
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// get unproject matrix:
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// Matrix.invertM(mTmpMatrix, 0, mViewMatrix, 0);
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Matrix.setIdentityM(mUnprojMatrix, 0);
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// inverse scale
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@@ -400,6 +495,10 @@ public class MapViewPosition {
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// unapply projection, tilt, rotate and scale
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// (AB)^-1 = B^-1*A^-1
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Matrix.multiplyMM(mUnprojMatrix, 0, mTmpMatrix, 0, mProjMatrixI, 0);
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Matrix.multiplyMM(mTmpMatrix, 0, mProjMatrix, 0, mViewMatrix, 0);
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Matrix.invertM(mUnprojMatrix, 0, mTmpMatrix, 0);
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}
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/** @return true if this MapViewPosition is valid, false otherwise. */
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@@ -423,33 +522,24 @@ public class MapViewPosition {
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return true;
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}
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// JAVA...
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class Point2D {
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double x;
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double y;
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}
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// only use in synchronized functions!
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Point2D mMovePoint = new Point2D();
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/**
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* Moves this MapViewPosition by the given amount of pixels.
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* @param mx the amount of pixels to move the map horizontally.
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* @param my the amount of pixels to move the map vertically.
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*/
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public synchronized void moveMap(float mx, float my) {
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getMove(mx, my);
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Point2D p = getMove(mx, my);
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mLatitude = MercatorProjection.pixelYToLatitude(mPosY - mMovePoint.y, mZoomLevel);
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mLatitude = MercatorProjection.pixelYToLatitude(mPosY - p.y, mZoomLevel);
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mLatitude = MercatorProjection.limitLatitude(mLatitude);
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mLongitude = MercatorProjection.pixelXToLongitude(mPosX - mMovePoint.x, mZoomLevel);
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mLongitude = MercatorProjection.pixelXToLongitude(mPosX - p.x, mZoomLevel);
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mLongitude = MercatorProjection.wrapLongitude(mLongitude);
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updatePosition();
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}
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private void getMove(float mx, float my) {
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private Point2D getMove(float mx, float my) {
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double dx = mx / mScale;
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double dy = my / mScale;
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@@ -465,6 +555,7 @@ public class MapViewPosition {
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mMovePoint.x = dx;
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mMovePoint.y = dy;
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return mMovePoint;
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}
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/**
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