Added SimpleBrightnessModel for rendering 'solid' blocks

src/codechicken/lib/lighting/SimpleBrightnessModel.java

@@ -0,0 +1,54 @@
+package codechicken.lib.lighting;
+
+import codechicken.lib.render.CCRenderState;
+import codechicken.lib.vec.BlockCoord;
+import net.minecraft.block.Block;
+import net.minecraft.world.IBlockAccess;
+
+/**
+ * Faster precomputed version of LightModel that only works for axis planar sides
+ */
+public class SimpleBrightnessModel implements CCRenderState.IVertexOperation
+{
+    public static final int operationIndex = CCRenderState.registerOperation();
+    public static SimpleBrightnessModel instance = new SimpleBrightnessModel();
+
+    public IBlockAccess access;
+    public BlockCoord pos = new BlockCoord();
+
+    private int sampled = 0;
+    private int[] samples = new int[6];
+    private BlockCoord c = new BlockCoord();
+
+    public void locate(IBlockAccess a, int x, int y, int z) {
+        access = a;
+        pos.set(x, y, z);
+        sampled = 0;
+    }
+
+    public int sample(int side) {
+        if ((sampled & 1 << side) == 0) {
+            c.set(pos).offset(side);
+            Block block = access.getBlock(c.x, c.y, c.z);
+            samples[side] = access.getLightBrightnessForSkyBlocks(c.x, c.y, c.z, block.getLightValue(access, c.x, c.y, c.z));
+            sampled |= 1 << side;
+        }
+        return samples[side];
+    }
+
+    @Override
+    public boolean load() {
+        CCRenderState.pipeline.addDependency(CCRenderState.sideAttrib);
+        return true;
+    }
+
+    @Override
+    public void operate() {
+        CCRenderState.setBrightness(sample(CCRenderState.side));
+    }
+
+    @Override
+    public int operationID() {
+        return operationIndex;
+    }
+}