From 32117d0bf27e0a72165707fe4e56d231136e734b Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias@gamezock.de>
Date: Sat, 16 Jan 2010 17:50:43 +0100
Subject: Use index buffers to render tiles

---
 src/de/gamezock/metacraft/ui/Main.java     |  2 +-
 src/de/gamezock/metacraft/ui/Renderer.java | 49 +++++++++++++++++++-----------
 2 files changed, 33 insertions(+), 18 deletions(-)

(limited to 'src/de/gamezock/metacraft/ui')

diff --git a/src/de/gamezock/metacraft/ui/Main.java b/src/de/gamezock/metacraft/ui/Main.java
index c26e510..f5eb3f9 100644
--- a/src/de/gamezock/metacraft/ui/Main.java
+++ b/src/de/gamezock/metacraft/ui/Main.java
@@ -144,6 +144,6 @@ public class Main implements GLEventListener {
 	 * @param args
 	 */
 	public static void main(String[] args) {
-		new Main();
+	  new Main();
 	}
 }
diff --git a/src/de/gamezock/metacraft/ui/Renderer.java b/src/de/gamezock/metacraft/ui/Renderer.java
index 3213a53..6d8d04a 100644
--- a/src/de/gamezock/metacraft/ui/Renderer.java
+++ b/src/de/gamezock/metacraft/ui/Renderer.java
@@ -1,12 +1,15 @@
 package de.gamezock.metacraft.ui;
 
+import java.nio.IntBuffer;
+import java.util.List;
+
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2;
-import javax.vecmath.Point3f;
-import javax.vecmath.Vector3f;
 
+import de.gamezock.metacraft.data.IndexedTriangle;
 import de.gamezock.metacraft.data.Map;
-import de.gamezock.metacraft.data.Triangle;
+import de.gamezock.metacraft.data.Tile;
+import de.gamezock.metacraft.data.VertexBuffer;
 
 public class Renderer {
   private Main main;
@@ -15,14 +18,20 @@ public class Renderer {
     this.main = main;
   }
   
-  private void renderTriangle(GL2 gl, Triangle t) {
-    for(int i = 0; i < 3; ++i) {
-      Point3f v = t.getVertex(i);
-      Vector3f n = t.getNormal(i);
-      
-      gl.glNormal3f(n.x, n.y, n.z);
-      gl.glVertex3f(v.x, v.y, v.z);
-    }
+  private void renderTile(GL2 gl, Tile tile) {
+    List<IndexedTriangle> triangles = tile.getData().getTriangles();
+    
+    if(triangles.isEmpty())
+      return;
+    
+    VertexBuffer buffer = triangles.get(0).getBuffer();
+    
+    gl.glInterleavedArrays(GL2.GL_N3F_V3F, 0, buffer.getBuffer().clear());
+    
+    IntBuffer indexBuffer = tile.getData().getIndexBuffer();
+    indexBuffer.clear();
+    
+    gl.glDrawElements(GL.GL_TRIANGLES, indexBuffer.capacity(), GL2.GL_UNSIGNED_INT, indexBuffer);
   }
   
   public void render(GL2 gl) {
@@ -30,20 +39,26 @@ public class Renderer {
     
     Map currentMap = main.getCurrentMap();
     
+    gl.glEnable(GL2.GL_VERTEX_ARRAY);
+    gl.glEnable(GL2.GL_NORMAL_ARRAY);
+    
     gl.glPushMatrix();
     gl.glRotatef((System.currentTimeMillis()%9000)/25.0f, 0, 0, 1);
     gl.glTranslatef(-20, -20, 0);
     
-    gl.glBegin(GL.GL_TRIANGLES);
-    
     gl.glColor3f(1, 1, 1);
     
-    for(Triangle t : currentMap.getTriangleData()) {
-      renderTriangle(gl, t);
+    for(int x = 0; x < currentMap.getWidth(); ++x) {
+      for(int y = 0; y < currentMap.getHeight(); ++y) {
+        gl.glPushMatrix();
+        
+        gl.glTranslatef(currentMap.getTileSize()*x, currentMap.getTileSize()*y, currentMap.getTileHeight(x, y));
+        renderTile(gl, currentMap.getTile(x, y));
+        
+        gl.glPopMatrix();
+      }
     }
     
-    gl.glEnd();
-    
     gl.glPopMatrix();
   }
 }
-- 
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