1 files changed, 78 insertions, 0 deletions
diff --git a/ihl/enviroment/LightSource.java b/ihl/enviroment/LightSource.java
new file mode 100644
index 0000000..291b15a
--- /dev/null
+++ b/ihl/enviroment/LightSource.java
@@ -0,0 +1,78 @@
+package ihl.enviroment;
+
+import java.util.BitSet;
+
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+import ihl.ClientProxy;
+import ihl.IHLMod;
+
+@SideOnly(value=Side.CLIENT)
+public class LightSource {
+	private final int centerX;
+	private final int centerY;
+	private final int centerZ;
+	public int fromX;
+	public int fromY;
+	public int fromZ;
+	public int toX;
+	public int toY;
+	public int toZ;
+	private final int red;
+	private final int green;
+	private final int blue;
+	private final int power;
+	public final BitSet illuminatedBlocks = new BitSet();
+
+	public LightSource(int centerX1, int centerY1, int centerZ1, 
+			int red1, int green1, int blue1, int power1) {
+		centerX = centerX1;
+		centerY = centerY1;
+		centerZ = centerZ1;
+		red = red1;
+		green = green1;
+		blue = blue1;
+		power = power1;
+	}
+	
+	public void setBorders(int fromX1, int fromY1, int fromZ1,
+			int toX1, int toY1, int toZ1)
+	{
+		fromX=fromX1; 
+		fromY=fromY1; 
+		fromZ=fromZ1;
+		toX=toX1;
+		toY=toY1;
+		toZ=toZ1;
+	}
+
+	public boolean isBlockIlluminated(int x, int y, int z) {
+		if(x<fromX || x>toX || y<fromY || y>toY || z<fromZ || z>toZ)
+		{
+			return false;
+		}
+		else
+		{
+			int rx = x - centerX;
+			int ry = y - centerY;
+			int rz = z - centerZ;
+			int l = ((ClientProxy)IHLMod.proxy).getLightHandler().encodeXYZ(rx, ry, rz);
+			return illuminatedBlocks.get(l);
+		}
+	}
+
+	public int[] getLightValue(int x, int y, int z, int[] normal) {
+		int dx = centerX-x;
+		int dy = centerY-y;
+		int dz = centerZ-z;
+		int d = dx*dx+dy*dy+dz*dz;
+		dx=normal[0]*dx;
+		dy=normal[1]*dy;
+		dz=normal[2]*dz;
+		dx=dx>0?(dx<<16)/d:0;
+		dy=dy>0?(dy<<16)/d:0;
+		dz=dz>0?(dz<<16)/d:0;
+		int brightness = Math.min(power*(dx+dy+dz)>>16,255);
+		return new int[]{brightness, this.red, this.blue, this.green};
+	}
+}