From cceae491ced7d1c5aacb4a466bdc79e8de367bc7 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Mon, 11 Jan 2010 16:37:05 +0100
Subject: Started Renderer

---
 src/de/gamezock/metacraft/ui/Renderer.java | 88 ++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/de/gamezock/metacraft/ui/Renderer.java

(limited to 'src/de/gamezock/metacraft/ui/Renderer.java')

diff --git a/src/de/gamezock/metacraft/ui/Renderer.java b/src/de/gamezock/metacraft/ui/Renderer.java
new file mode 100644
index 0000000..cea0480
--- /dev/null
+++ b/src/de/gamezock/metacraft/ui/Renderer.java
@@ -0,0 +1,88 @@
+package de.gamezock.metacraft.ui;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2;
+import javax.vecmath.Point3f;
+import javax.vecmath.Vector3f;
+
+import de.gamezock.metacraft.data.Map;
+import de.gamezock.metacraft.data.Tile;
+
+public class Renderer {
+  private Main main;
+  
+  public Renderer(Main main) {
+    this.main = main;
+  }
+  
+  private void renderTileQuad(GL2 gl, Tile tile, int x, int y) {
+    float[][] heightmap = tile.getData().getHeightmap();
+    
+    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]);
+      
+      Vector3f edge1 = new Vector3f(), edge2 = new Vector3f();
+      
+      edge1.sub(v1, v2);
+      edge2.sub(v3, v2);
+      
+      Vector3f normal = new Vector3f();
+      normal.cross(edge1, edge2);
+      normal.normalize();
+      
+      gl.glColor3f(1, 1, 1);
+      gl.glNormal3f(normal.x, normal.y, normal.z);
+      gl.glVertex3f(v1.x, v1.y, v1.z);
+      gl.glVertex3f(v2.x, v2.y, v2.z);
+      gl.glVertex3f(v3.x, v3.y, v3.z);
+    }
+  }
+  
+  private void renderTile(GL2 gl, Tile tile) {
+    gl.glBegin(GL.GL_TRIANGLES);
+    
+    for(int i = 0; i < tile.getData().getSize(); ++i) {
+      for(int j = 0; j < tile.getData().getSize(); ++j) {
+        renderTileQuad(gl, tile, i, j);
+      }
+    }
+    
+    gl.glEnd();
+  }
+  
+  public void render(GL2 gl) {
+    gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+    
+    Map currentMap = main.getCurrentMap();
+    
+    gl.glPushMatrix();
+    gl.glRotatef((System.currentTimeMillis()%3600)/10.0f, 0, 0, 1);
+    
+    for(int i = 0; i < currentMap.getWidth(); ++i) {
+      for(int j = 0; j < currentMap.getHeight(); ++j) {
+        gl.glPushMatrix();
+        gl.glTranslatef(i*currentMap.getTileSize(), j*currentMap.getTileSize(), currentMap.getTileHeight(i, j));
+        
+        renderTile(gl, currentMap.getTile(i, j));
+        
+        gl.glPopMatrix();
+      }
+    }
+    
+    gl.glPopMatrix();
+  }
+
+}
-- 
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