/
Tiles.cs
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/
Tiles.cs
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using System;
using System.Collections;
using System.Reflection;
using UnityEngine;
namespace KerbalGIS
{
public class Tiles
{
public static Texture2D getSatTile (CelestialBody body, int x, int y, int z, int size = 256)
{
if (body.pqsController == null)
return null;
size = getSize (body, size, z);
TileData data = getTileData(body, x, y, z, size);
size = data.size;
Texture2D ret = new Texture2D (size, size, TextureFormat.ARGB32, false);
ret.SetPixels (data.color);
ret.Apply ();
return ret;
}
public static Texture2D getBiomeTile (CelestialBody body, int tileX, int tileY, int z, int size = 256)
{
if (body.BiomeMap.Attributes.Length <= 1)
return null;
Texture2D ret = new Texture2D (size, size, TextureFormat.ARGB32, false);
for (int x = 0; x < size; x++) {
for (int y = 0; y < size; y++) {
Color c = getBiomeColor (body, tile2lat (tileY + 1 - y / (size - 1.0), z), tile2lon (tileX + x / (size - 1.0), z));
ret.SetPixel (x, y, c);
}
}
ret.Apply ();
return ret;
}
public static Texture2D getHillshadingTile (CelestialBody body, int tileX, int tileY, int z, int size = 256)
{
if (body.pqsController == null)
return null;
size = getSize (body, size, z);
TileData data = getTileData(body, tileX, tileY, z, size);
size = data.size;
Texture2D ret = new Texture2D (size, size, TextureFormat.ARGB32, false);
for (int x = 0; x < size; x++) {
for (int y = 0; y < size; y++) {
double s = Math.PI * 2 * body.Radius / ((size - 1) << z);
double dx = ((data.getEle(x-1, y-1) + 2*data.getEle(x, y-1) + data.getEle(x+1, y-1)) -
(data.getEle(x-1, y+1) + 2*data.getEle(x, y+1) + data.getEle(x+1, y+1))) /
(4.0 * s);
double dy = ((data.getEle(x-1, y-1) + 2*data.getEle(x-1, y) + data.getEle(x-1, y+1)) -
(data.getEle(x+1, y-1) + 2*data.getEle(x+1, y) + data.getEle(x+1, y+1))) /
(4.0 * s);
double slope = Math.PI / 2 - Math.Atan (Math.Sqrt (dx * dx + dy * dy));
double aspect = Math.Atan2 (dx, dy);
double cang = Math.Sin (Math.PI / 4) * Math.Sin (slope) +
Math.Cos (Math.PI / 4) * Math.Cos (slope) *
Math.Cos ((315) / 180 * Math.PI - Math.PI / 2 - aspect);
//Color c = (cang > 0.5)?(new Color(1f, 1f, 1f, (float)cang*2-1)):(new Color(0f, 0f, 0f, (float)cang*2));
Color c = new Color ((float)cang, (float)cang, (float)cang, 1.0f);
ret.SetPixel (x, y, c);
}
}
ret.Apply ();
return ret;
}
private static Hashtable tileDataCache = new Hashtable();
public static TileData getTileData (CelestialBody body, int tileX, int tileY, int z, int size = 256)
{
string args = String.Format("{0},{1},{2},{3}", body.name, tileX, tileY, z);
TileData ret = (TileData)tileDataCache [args];
if (ret == null || ret.size < size) {
ret = new TileData (size);
initMaps (body);
for (int x = 0; x < size; x++) {
for (int y = 0; y < size; y++) {
double lat = tile2lat (tileY + 1 - y / (size - 1.0), z);
double lon = tile2lon (tileX + x / (size - 1.0), z);
var buildData = getBuildData (body, lat, lon);
ret.elevation [y * size + x] = buildData.vertHeight;
ret.color [y * size + x] = buildData.vertColor;
}
}
endMaps (body);
tileDataCache[args] = ret;
}
return ret;
}
public static double tile2lon (double x, int z)
{
return (x / Math.Pow (2.0, z) * 360.0) - 180.0;
}
public static double tile2lat (double y, int z)
{
return -(y / Math.Pow (2.0, z) * 360.0) + 180.0;
}
private static Color getBiomeColor (CelestialBody body, double lat, double lon)
{
if (lat > 90 || lat < -90 || lon > 180 || lon < -180)
return Color.clear;
Color r = body.BiomeMap.GetAtt (lat * Mathf.PI / 180, lon * Mathf.PI / 180).mapColor;
r.a = 1.0f;
return r;
}
private static bool AllowScatter;
public static void initMaps (CelestialBody body)
{
PQS pqs = body.pqsController;
AllowScatter = PQS.Global_AllowScatter;
PQS.Global_AllowScatter = false;
pqs.isBuildingMaps = true;
pqs.isFakeBuild = true;
typeof(PQS).InvokeMember ("SetupMods", BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, pqs, null);
typeof(PQS).InvokeMember ("SetupBuildDelegates", BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, pqs, new object[]{true});
}
public static void endMaps (CelestialBody body)
{
PQS pqs = body.pqsController;
PQS.Global_AllowScatter = AllowScatter;
pqs.isBuildingMaps = false;
pqs.isFakeBuild = false;
}
public static PQS.VertexBuildData getBuildData (CelestialBody body, double lat, double lon)
{
if (lat > 90 || lat < -90 || lon > 180 || lon < -180)
return new PQS.VertexBuildData ();
PQS pqs = body.pqsController;
Vector3d radialVector = body.GetRelSurfaceNVector (lat, lon);
var buildData = new PQS.VertexBuildData ();
buildData.directionFromCenter = radialVector.normalized;
buildData.vertHeight = pqs.radius;
typeof(PQS).InvokeMember ("Mod_OnVertexBuildHeight", BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, pqs, new object[]{buildData});
typeof(PQS).InvokeMember ("Mod_OnVertexBuild", BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.NonPublic, null, pqs, new object[]{buildData});
buildData.vertColor.a = 1.0f;
return buildData;
}
public static int getSize (CelestialBody body, int max, int z)
{
double pixels = Math.Sqrt (PQS.cacheVertCount) * 4 * Math.Pow (2, body.pqsController.maxLevel);
return Math.Min ((int)(pixels / Math.Pow (2, z)), max);
}
public class TileData {
public int size = 256;
public Color[] color;
public double[] elevation;
public TileData(int size = 256) {
if (size < 2) size = 2;
this.size = size;
color = new Color[size*size];
elevation = new double[size*size];
}
public double getEle (int x, int y)
{
if (x < 0) {
return 2*getEle(x+1, y) - getEle(x+2, y);
} else if (x >= size) {
return 2*getEle(x-1, y) - getEle(x-2, y);
}
if (y < 0) {
return 2*getEle(x, y+1) - getEle(x, y+2);
} else if (y >= size) {
return 2*getEle(x, y-1) - getEle(x, y-2);
}
return elevation[y * size + x];
}
}
}
}