up

Author: comcraftdev

src/comcrafthd/ChunkList.java

@@ -28,10 +28,39 @@ private int getInitialSize() {
         return (int) (ComcraftPrefs.instance.chunkRenderDistance * ComcraftPrefs.instance.chunkRenderDistance * 3.2f) + 1;
     }
 
-    public void triggerRenderChunks(final ComcraftRenderer renderer) {
+    public void triggerRenderClosestChunk(final ComcraftRenderer renderer, int blockX, int blockZ) {
+        final short originChunkX = (short) (blockX >> Chunk.BLOCK_TO_CHUNK_SHIFT);
+        final short originChunkZ = (short) (blockZ >> Chunk.BLOCK_TO_CHUNK_SHIFT);
+
+        Chunk closest = null;
+        int min = 0;
+
         for (final Enumeration e = chunks.elements(); e.hasMoreElements();) {
             final Chunk chunk = (Chunk) e.nextElement();
-            renderer.renderChunkListCallback(chunk);
+
+            if (!areNeighboursLoaded(chunk.chunkX, chunk.chunkZ)) {
+                continue;
+            }
+            
+            synchronized (chunk.renderCache) {
+                if (chunk.renderCache.done || chunk.renderCache.isCacheBeingGenerated) {
+                    continue;
+                }
+            }
+
+            final int x = chunk.chunkX - originChunkX;
+            final int z = chunk.chunkZ - originChunkZ;
+
+            final int dist = x * x + z * z;
+
+            if (closest == null || dist < min) {
+                closest = chunk;
+                min = dist;
+            }
+        }
+
+        if (closest != null) {
+            renderer.renderChunkListCallback(closest);
         }
     }
 
@@ -76,9 +105,9 @@ public void dropChunk(final Chunk chunk) {
                 return;
             }
         }
-        
+
         chunks.remove(getChunkKey(chunk.chunkX, chunk.chunkZ));
-        
+
         ComcraftGame.instance.renderer.dropChunkListCallback(chunk);
     }
 
@@ -109,5 +138,21 @@ public Chunk getChunk(int chunkX, int chunkZ) {
     private void addChunk(int chunkX, int chunkZ, Chunk chunk) {
         chunks.put(getChunkKey(chunkX, chunkZ), chunk);
     }
+    
+    public boolean areNeighboursLoaded(int chunkX, int chunkZ) {
+        if (!chunkExists(chunkX - 1, chunkZ)) {
+            return false;
+        }
+        if (!chunkExists(chunkX + 1, chunkZ)) {
+            return false;
+        }
+        if (!chunkExists(chunkX, chunkZ - 1)) {
+            return false;
+        }
+        if (!chunkExists(chunkX, chunkZ + 1)) {
+            return false;
+        }
+        return true;
+    }
 
 }

src/comcrafthd/client/ComcraftRenderer.java

@@ -9,6 +9,7 @@
 import comcrafthd.ChunkList;
 import comcrafthd.ComcraftGame;
 import comcrafthd.Log;
+import comcrafthd.MathHelper;
 import comcrafthd.client.midlets.ComcraftMIDPCanvas;
 import java.io.IOException;
 import javax.microedition.lcdui.Graphics;
@@ -58,11 +59,9 @@ public void initialize() {
     public void stop() {
         chunkRendererThread.stop();
     }
-    
+
     public void render() {
-        if (chunkRendererThread.hasVaccancy) {
-            ComcraftGame.instance.chunkList.triggerRenderChunks(this);
-        }
+        renderChunksCache();
 
         int hints = Graphics3D.OVERWRITE;
 
@@ -74,24 +73,33 @@ public void render() {
         comcraftCanvas.flushGraphics();
     }
 
+    private void renderChunksCache() {
+        if (chunkRendererThread.hasVaccancy) {
+            final CameraMovement cameraMovement = ComcraftGame.instance.cameraMovement;
+
+            final int centerBlockX = MathHelper.roundToInt(cameraMovement.positionX);
+            final int centerBlockZ = MathHelper.roundToInt(cameraMovement.positionZ);
+
+            ComcraftGame.instance.chunkList.triggerRenderClosestChunk(this, centerBlockX, centerBlockZ);
+        }
+    }
+
     public synchronized void chunkRendererThreadCallback(final Chunk chunk) {
         world.addChild(chunk.renderCache.node);
     }
 
     public void renderChunkListCallback(final Chunk chunk) {
-        if (chunk.renderCache.done == false) {
-            clearChunkRenderCache(chunk);
+        clearChunkRenderCache(chunk);
 
-            if (chunkRendererThread.hasVaccancy) {
-                chunkRendererThread.enqueue(chunk);
-            }
+        if (chunkRendererThread.hasVaccancy) {
+            chunkRendererThread.enqueue(chunk);
         }
     }
 
     public void dropChunkListCallback(final Chunk chunk) {
         clearChunkRenderCache(chunk);
     }
-    
+
     private void clearChunkRenderCache(final Chunk chunk) {
         if (chunk.renderCache.node != null) {
             world.removeChild(chunk.renderCache.node);

src/comcrafthd/client/midlets/ComcraftMIDlet.vmd

@@ -265,10 +265,10 @@
     </Document>
     <FlowScene version="1">
         <Node componentID="25" descriptorID="componentNode25" x="62" y="305"/>
-        <Node componentID="75" descriptorID="componentNode75" x="231" y="841"/>
-        <Node componentID="22" descriptorID="componentNode22" x="511" y="436"/>
         <Node componentID="65" descriptorID="componentNode65" x="442" y="684"/>
+        <Node componentID="75" descriptorID="componentNode75" x="231" y="841"/>
         <Node componentID="45" descriptorID="componentNode45" x="61" y="467"/>
+        <Node componentID="22" descriptorID="componentNode22" x="511" y="436"/>
         <Node componentID="2" descriptorID="componentNode2" x="35" y="160"/>
     </FlowScene>
 </VisualDesign>