Disable vanilla chunk mesh construction

Improves chunk update performance

2 files changed, 15 insertions, 1 deletions

diff --git a/src/main/java/makamys/neodymium/config/Config.java b/src/main/java/makamys/neodymium/config/Config.java
index 5b110fd..a8ea60e 100644
--- a/src/main/java/makamys/neodymium/config/Config.java
+++ b/src/main/java/makamys/neodymium/config/Config.java
@@ -80,6 +80,8 @@ public class Config {
     public static boolean showDebugInfo;
     @ConfigBoolean(cat="debug", def=false)
     public static boolean wireframe;
+    @ConfigBoolean(cat="debug", def=false, com="Enable building of vanilla chunk meshes. Makes it possible to switch to the vanilla renderer on the fly, at the cost of reducing chunk update performance.")
+    public static boolean enableVanillaChunkMeshes;
     
     private static Configuration config;
     private static File configFile = new File(Launch.minecraftHome, "config/" + MODID + ".cfg");
diff --git a/src/main/java/makamys/neodymium/mixin/MixinTessellator.java b/src/main/java/makamys/neodymium/mixin/MixinTessellator.java
index 15f71da..cdd4ffe 100644
--- a/src/main/java/makamys/neodymium/mixin/MixinTessellator.java
+++ b/src/main/java/makamys/neodymium/mixin/MixinTessellator.java
@@ -1,10 +1,12 @@
 package makamys.neodymium.mixin;
 
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
+import makamys.neodymium.config.Config;
 import makamys.neodymium.ducks.ITessellator;
 import makamys.neodymium.renderer.ChunkMesh;
 import net.minecraft.client.renderer.Tessellator;
@@ -14,10 +16,20 @@ abstract class MixinTessellator implements ITessellator {
     
     private boolean nd$captureMeshes;
     
-    @Inject(method = "draw", at = @At(value = "HEAD"))
+    @Shadow protected abstract void reset();
+
+    @Shadow private boolean isDrawing;
+    
+    @Inject(method = "draw", at = @At(value = "HEAD"), cancellable = true)
     private void preDraw(CallbackInfoReturnable<Integer> cir) {
         if(nd$captureMeshes) {
             ChunkMesh.preTessellatorDraw((Tessellator)(Object)this);
+            
+            if(Config.enabled && !Config.enableVanillaChunkMeshes) {
+                isDrawing = false;
+                reset();
+                cir.setReturnValue(0);
+            }
         }
     }