From b9cc8e8871de73bf70406913f18b446a1fc723e8 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Tue, 12 Jan 2010 13:01:59 +0100
Subject: Generate triangle data from tile heightmaps

---
 src/de/gamezock/metacraft/data/Map.java | 89 ++++++++++++++++++++++++++-------
 1 file changed, 72 insertions(+), 17 deletions(-)

(limited to 'src/de/gamezock/metacraft/data/Map.java')

diff --git a/src/de/gamezock/metacraft/data/Map.java b/src/de/gamezock/metacraft/data/Map.java
index e387628..770ffe7 100644
--- a/src/de/gamezock/metacraft/data/Map.java
+++ b/src/de/gamezock/metacraft/data/Map.java
@@ -1,41 +1,96 @@
 package de.gamezock.metacraft.data;
 
+import java.util.List;
+import java.util.Vector;
+
+import javax.vecmath.Point3f;
+
 public class Map {
-	private Tile[][] tiles;
-	private float[][] heightmap;
-	
-	private int width, height;
-	private int tileSize;
-	
+  private List<Triangle> triangleData;
+  private float[][] heightmap;
+  
+  
 	public Map() {
-	  width = height = 1;
+	  int width = 5;
+	  int height = 5;
 	  
-	  heightmap = new float[width][height];
-	  heightmap[0][0] = 0;
+	  float[][] tileHeightmap = new float[width][height];
+	  Tile[][] tiles = new Tile[width][height];
 	  
-	  tiles = new Tile[width][height];
-	  tiles[0][0] = new Tile(new TestTile());
+	  for(int i = 0; i < width; ++i) {
+	    for(int j = 0; j < height; ++j) {
+	      tileHeightmap[i][j] = ((i-2)*(i-2)+(j-2)*(j-2))*0.5f;
+	      tiles[i][j] = new Tile(new TestTile());
+	    }
+	  }
 	  
-	  tileSize = tiles[0][0].getData().getSize();
+	  createMapData(tiles, tileHeightmap);
 	}
 	
-	public Tile getTile(int x, int y) {
+	private void createMapData(Tile[][] tiles, float[][] tileHeightmap) {
+	  int tileSize = tiles[0][0].getData().getSize();
+	  
+	  heightmap = new float[tiles.length * tileSize][tiles[0].length * tileSize];
+	  
+	  for(int i = 0; i < tiles.length; ++i) {
+	    for(int j = 0; j < tiles[i].length; ++j) {
+	      float[][] localHeightmap = tiles[i][j].getData().getHeightmap();
+	      
+	      for(int x = 0; x < tileSize; ++x) {
+	        for(int y = 0; y < tileSize; ++y) {
+	          heightmap[i*tileSize + x][j*tileSize + y] = tileHeightmap[i][j] + localHeightmap[x][y];
+	        }
+	      }
+	    }
+	  }
+	  
+	  triangleData = new Vector<Triangle>();
+	  
+	  for(int x = 0; x < heightmap.length-1; ++x) {
+	    for(int y = 0; y < heightmap[x].length-1; ++y) {
+	      float[] h = new float[4];
+	      h[0] = heightmap[x][y];
+	      h[1] = heightmap[x+1][y];
+	      h[2] = heightmap[x+1][y+1];
+	      h[3] = heightmap[x][y+1];
+
+	      float center = (h[0] + h[1] + h[2] + h[3]) / 4;
+
+	      for(int i = 0; i < 4; ++i) {
+	        int i_1 = (i+1)%4;
+	        int i_2 = (i+2)%4;
+
+	        Point3f v1 = new Point3f(x + i_1/2, y + i/2, h[i]);
+	        Point3f v2 = new Point3f(x+0.5f, y+0.5f, center);
+	        Point3f v3 = new Point3f(x + i_2/2, y + i_1/2, h[i_1]);
+	        
+	        triangleData.add(new Triangle(v1, v2, v3));
+	      }
+	    }
+	  }
+	}
+	
+	/*public Tile getTile(int x, int y) {
 	  return tiles[x][y];
 	}
 	
 	public float getTileHeight(int x, int y) {
 	  return heightmap[x][y];
-	}
+	}*/
 	
 	public int getWidth() {
-	  return width;
+	  return heightmap.length;
 	}
 	
 	public int getHeight() {
-	  return height;
+	  return heightmap[0].length;
 	}
 	
-	public int getTileSize() {
+	/*public int getTileSize() {
 	  return tileSize;
+	}*/
+	
+	public List<Triangle> getTriangleData() {
+	  return triangleData;
 	}
 }
-- 
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