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add heightOffset for Line- and MeshLayer

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This commit is contained in:
Hannes Janetzek 2014-02-12 02:08:19 +01:00
parent 27153c8093
commit 8d350238cf
5 changed files with 50 additions and 14 deletions
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2
vtm-android-app

@ -1 +1 @@
Subproject commit d613072705824f130b1223ca82af2ae148835f41
Subproject commit 329c626e1ab0799019ac06f694227deac5f4702b

2
vtm-android/src/org/oscim/android/MapScaleBar.java
View File

@ -117,7 +117,7 @@ public class MapScaleBar extends Layer implements UpdateListener {
mPrevLatitude = latitude;
double groundResolution = MercatorProjection
.calculateGroundResolution(latitude, mapPosition.scale);
.groundResolution(latitude, mapPosition.scale);
int[] scaleBarValues;
if (mImperialUnits) {

9
vtm/src/org/oscim/core/MercatorProjection.java
View File

@ -57,11 +57,18 @@ public final class MercatorProjection {
* the map scale at which the resolution should be calculated.
* @return the ground resolution at the given latitude and zoom level.
*/
public static double calculateGroundResolution(double latitude, double scale) {
public static double groundResolution(double latitude, double scale) {
return Math.cos(latitude * (Math.PI / 180)) * EARTH_CIRCUMFERENCE
/ (Tile.SIZE * scale);
}
public static float groundResolution(MapPosition pos) {
double lat = MercatorProjection.toLatitude(pos.y);
return (float) (Math.cos(lat * (Math.PI / 180))
* MercatorProjection.EARTH_CIRCUMFERENCE
/ (Tile.SIZE * pos.scale));
}
/**
* Projects a longitude coordinate (in degrees) to the range [0.0,1.0]
*

33
vtm/src/org/oscim/renderer/elements/LineLayer.java
View File

@ -21,6 +21,7 @@ import org.oscim.backend.GLAdapter;
import org.oscim.backend.canvas.Paint.Cap;
import org.oscim.core.GeometryBuffer;
import org.oscim.core.MapPosition;
import org.oscim.core.MercatorProjection;
import org.oscim.core.Tile;
import org.oscim.renderer.GLState;
import org.oscim.renderer.GLUtils;
@ -57,7 +58,9 @@ public final class LineLayer extends RenderElement {
public float width;
public boolean roundCap;
private float mMinDist = 1 / 4f;
private float mMinDist = 1 / 8f;
public float heightOffset;
LineLayer(int layer) {
super(RenderElement.LINE);
@ -77,7 +80,7 @@ public final class LineLayer extends RenderElement {
* For point reduction by minimal distance. Default is 1/4.
*/
public void setDropDistance(float minDist) {
mMinDist = minDist < 1 / 4f ? 1 / 4f : minDist;
mMinDist = minDist < 1 / 8f ? 1 / 8f : minDist;
}
public void addLine(GeometryBuffer geom) {
@ -116,10 +119,8 @@ public final class LineLayer extends RenderElement {
short v[] = si.vertices;
int opos = si.used;
/*
* Note: just a hack to save some vertices, when there are
* more than 200 lines per type. FIXME make optional!
*/
/* Note: just a hack to save some vertices, when there are
* more than 200 lines per type. FIXME make optional! */
if (rounded && index != null) {
int cnt = 0;
for (int i = 0, n = index.length; i < n; i++, cnt++) {
@ -589,6 +590,7 @@ public final class LineLayer extends RenderElement {
private static int[] hLineFade = new int[2];
private static int[] hLineWidth = new int[2];
private static int[] hLineMode = new int[2];
private static int[] hLineHeight = new int[2];
public static int mTexID;
static boolean init() {
@ -616,6 +618,7 @@ public final class LineLayer extends RenderElement {
hLineWidth[i] = GL.glGetUniformLocation(lineProgram[i], "u_width");
hLineColor[i] = GL.glGetUniformLocation(lineProgram[i], "u_color");
hLineMode[i] = GL.glGetUniformLocation(lineProgram[i], "u_mode");
hLineHeight[i] = GL.glGetUniformLocation(lineProgram[i], "u_height");
hLineVertexPosition[i] = GL.glGetAttribLocation(lineProgram[i], "a_pos");
}
@ -665,6 +668,7 @@ public final class LineLayer extends RenderElement {
int uLineMode = hLineMode[mode];
int uLineColor = hLineColor[mode];
int uLineWidth = hLineWidth[mode];
int uLineHeight = hLineHeight[mode];
GLState.enableVertexArrays(hLineVertexPosition[mode], -1);
@ -681,7 +685,7 @@ public final class LineLayer extends RenderElement {
// scale factor to map one pixel on tile to one pixel on screen:
// used with orthographic projection, (shader mode == 1)
double pixel = (mode == SHADER_PROJ) ? 0 : 1.5 / scale;
double pixel = (mode == SHADER_PROJ) ? 0.0001 : 1.5 / scale;
GL.glUniform1f(uLineFade, (float) pixel);
@ -691,11 +695,21 @@ public final class LineLayer extends RenderElement {
boolean blur = false;
double width;
float heightOffset = 0;
GL.glUniform1f(uLineHeight, heightOffset);
RenderElement l = curLayer;
for (; l != null && l.type == RenderElement.LINE; l = l.next) {
LineLayer ll = (LineLayer) l;
Line line = ll.line;
if (ll.heightOffset != heightOffset) {
heightOffset = ll.heightOffset;
GL.glUniform1f(uLineHeight, heightOffset /
MercatorProjection.groundResolution(pos));
}
if (line.fade < pos.zoomLevel) {
GLUtils.setColor(uLineColor, line.color, 1);
} else if (line.fade > pos.zoomLevel) {
@ -706,7 +720,7 @@ public final class LineLayer extends RenderElement {
}
if (mode == SHADER_PROJ && blur && line.blur == 0) {
GL.glUniform1f(uLineFade, 0);
GL.glUniform1f(uLineFade, (float) pixel);
blur = false;
}
@ -797,13 +811,14 @@ public final class LineLayer extends RenderElement {
// xy hold position, zw extrusion vector
+ "attribute vec4 a_pos;"
+ "uniform float u_mode;"
+ "uniform float u_height;"
+ "varying vec2 v_st;"
+ "void main() {"
// scale extrusion to u_width pixel
// just ignore the two most insignificant bits.
+ " vec2 dir = a_pos.zw;"
+ " gl_Position = u_mvp * vec4(a_pos.xy + (u_width * dir), 0.0, 1.0);"
+ " gl_Position = u_mvp * vec4(a_pos.xy + (u_width * dir), u_height, 1.0);"
// last two bits hold the texture coordinates.
+ " v_st = abs(mod(dir, 4.0)) - 1.0;"

18
vtm/src/org/oscim/renderer/elements/MeshLayer.java
View File

@ -22,6 +22,7 @@ import org.oscim.backend.GL20;
import org.oscim.backend.canvas.Color;
import org.oscim.core.GeometryBuffer;
import org.oscim.core.MapPosition;
import org.oscim.core.MercatorProjection;
import org.oscim.renderer.BufferObject;
import org.oscim.renderer.GLState;
import org.oscim.renderer.GLUtils;
@ -42,6 +43,7 @@ public class MeshLayer extends RenderElement {
VertexItem indiceItems;
public Area area;
public float heightOffset;
public MeshLayer(int level) {
super(RenderElement.MESH);
@ -106,6 +108,7 @@ public class MeshLayer extends RenderElement {
private static int shaderProgram;
private static int hMatrix;
private static int hColor;
private static int hHeightOffset;
private static int hVertexPosition;
static boolean init() {
@ -115,6 +118,7 @@ public class MeshLayer extends RenderElement {
hMatrix = GL.glGetUniformLocation(shaderProgram, "u_mvp");
hColor = GL.glGetUniformLocation(shaderProgram, "u_color");
hHeightOffset = GL.glGetUniformLocation(shaderProgram, "u_height");
hVertexPosition = GL.glGetAttribLocation(shaderProgram, "a_pos");
return true;
}
@ -130,12 +134,21 @@ public class MeshLayer extends RenderElement {
m.mvp.setAsUniform(hMatrix);
float heightOffset = 0;
for (; l != null && l.type == RenderElement.MESH; l = l.next) {
MeshLayer ml = (MeshLayer) l;
if (ml.indicesVbo == null)
continue;
if (ml.heightOffset != heightOffset) {
heightOffset = ml.heightOffset;
GL.glUniform1f(hHeightOffset, heightOffset /
MercatorProjection.groundResolution(pos));
}
ml.indicesVbo.bind();
if (ml.area == null)
@ -164,9 +177,10 @@ public class MeshLayer extends RenderElement {
private final static String vertexShader = ""
+ "precision mediump float;"
+ "uniform mat4 u_mvp;"
+ "attribute vec4 a_pos;"
+ "uniform float u_height;"
+ "attribute vec2 a_pos;"
+ "void main() {"
+ " gl_Position = u_mvp * a_pos;"
+ " gl_Position = u_mvp * vec4(a_pos, u_height, 1.0);"
+ "}";
private final static String fragmentShader = ""