Use index buffers to render tiles

1 files changed, 60 insertions, 0 deletions

diff --git a/src/de/gamezock/metacraft/data/VertexBuffer.java b/src/de/gamezock/metacraft/data/VertexBuffer.java
new file mode 100644
index 0000000..c2205a0
--- /dev/null
+++ b/src/de/gamezock/metacraft/data/VertexBuffer.java
@@ -0,0 +1,60 @@
+package de.gamezock.metacraft.data;
+
+import java.nio.FloatBuffer;
+
+import javax.vecmath.Point3f;
+import javax.vecmath.Tuple3f;
+import javax.vecmath.Vector3f;
+
+public class VertexBuffer {
+  private FloatBuffer buffer;
+  
+  public VertexBuffer(int num) {
+    buffer = FloatBuffer.allocate(2*3*num);
+  }
+  
+  public FloatBuffer getBuffer() {
+    return buffer;
+  }
+  
+  private void setTuple(int i, Tuple3f tuple) {
+    buffer.position(3*i);
+    
+    buffer.put(tuple.x);
+    buffer.put(tuple.y);
+    buffer.put(tuple.z);
+  }
+  
+  private Point3f getTuple(int i) {
+    buffer.position(3*i);
+    
+    return new Point3f(buffer.get(), buffer.get(), buffer.get());
+  }
+  
+  public void setNormal(int i, Vector3f normal) {
+    setTuple(2*i, normal);
+  }
+  
+  public void setVertex(int i, Point3f vertex) {
+    setTuple(2*i + 1, vertex);
+  }
+  
+  public Vector3f getNormal(int i) {
+    return new Vector3f(getTuple(2*i));
+  }
+  
+  public Point3f getVertex(int i) {
+    return getTuple(2*i + 1);
+  }
+  
+  public int getSize() {
+    return buffer.capacity() / (2*3);
+  }
+  
+  public void dump() {
+    buffer.clear();
+    
+    while(buffer.hasRemaining())
+      System.out.println(buffer.get());
+  }
+}