Update #48 - Added some features from OptiFine

sources/main/java/net/optifine/CustomSky.java

@@ -0,0 +1,149 @@
+package net.optifine;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.renderer.texture.ITextureObject;
+import net.minecraft.client.renderer.texture.TextureManager;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.world.World;
+import net.optifine.render.Blender;
+import net.optifine.util.PropertiesOrdered;
+
+public class CustomSky {
+	private static CustomSkyLayer[][] worldSkyLayers = (CustomSkyLayer[][]) null;
+
+	public static void reset() {
+		worldSkyLayers = (CustomSkyLayer[][]) null;
+	}
+
+	public static void update() {
+		reset();
+
+		if (Config.isCustomSky()) {
+			worldSkyLayers = readCustomSkies();
+		}
+	}
+
+	private static CustomSkyLayer[][] readCustomSkies() {
+		CustomSkyLayer[][] acustomskylayer = new CustomSkyLayer[10][0];
+		String s = "mcpatcher/sky/world";
+		int i = -1;
+
+		for (int j = 0; j < acustomskylayer.length; ++j) {
+			String s1 = s + j + "/sky";
+			List list = new ArrayList();
+
+			for (int k = 1; k < 1000; ++k) {
+				String s2 = s1 + k + ".properties";
+				ResourceLocation resourcelocation = new ResourceLocation(s2);
+
+				try (InputStream inputstream = Minecraft.getMinecraft().getResourceManager()
+						.getResource(resourcelocation).getInputStream()) {
+					if (inputstream == null) {
+						break;
+					}
+
+					Properties properties = new PropertiesOrdered();
+					properties.load(inputstream);
+					inputstream.close();
+					Config.dbg("CustomSky properties: " + s2);
+					String s3 = s1 + k + ".png";
+					CustomSkyLayer customskylayer = new CustomSkyLayer(properties, s3);
+
+					if (customskylayer.isValid(s2)) {
+						ResourceLocation resourcelocation1 = new ResourceLocation(customskylayer.source);
+						TextureManager mgr = Minecraft.getMinecraft().getTextureManager();
+						mgr.bindTexture(resourcelocation1);
+						ITextureObject itextureobject = mgr.getTexture(resourcelocation1);
+
+						if (itextureobject == null) {
+							Config.warn("CustomSky: Texture not found: " + resourcelocation1);
+						} else {
+							customskylayer.textureId = itextureobject.getGlTextureId();
+							list.add(customskylayer);
+							inputstream.close();
+						}
+					}
+				} catch (FileNotFoundException var15) {
+					break;
+				} catch (IOException ioexception) {
+					ioexception.printStackTrace();
+				}
+			}
+
+			if (list.size() > 0) {
+				CustomSkyLayer[] acustomskylayer2 = (CustomSkyLayer[]) ((CustomSkyLayer[]) list
+						.toArray(new CustomSkyLayer[list.size()]));
+				acustomskylayer[j] = acustomskylayer2;
+				i = j;
+			}
+		}
+
+		if (i < 0) {
+			return (CustomSkyLayer[][]) null;
+		} else {
+			int l = i + 1;
+			CustomSkyLayer[][] acustomskylayer1 = new CustomSkyLayer[l][0];
+
+			for (int i1 = 0; i1 < acustomskylayer1.length; ++i1) {
+				acustomskylayer1[i1] = acustomskylayer[i1];
+			}
+
+			return acustomskylayer1;
+		}
+	}
+
+	public static void renderSky(World world, TextureManager re, float partialTicks) {
+		if (worldSkyLayers != null) {
+			int i = world.provider.getDimensionId();
+
+			if (i >= 0 && i < worldSkyLayers.length) {
+				CustomSkyLayer[] acustomskylayer = worldSkyLayers[i];
+
+				if (acustomskylayer != null) {
+					long j = world.getWorldTime();
+					int k = (int) (j % 24000L);
+					float f = world.getCelestialAngle(partialTicks);
+					float f1 = world.getRainStrength(partialTicks);
+					float f2 = world.getThunderStrength(partialTicks);
+
+					if (f1 > 0.0F) {
+						f2 /= f1;
+					}
+
+					for (int l = 0; l < acustomskylayer.length; ++l) {
+						CustomSkyLayer customskylayer = acustomskylayer[l];
+
+						if (customskylayer.isActive(world, k)) {
+							customskylayer.render(world, k, f, f1, f2);
+						}
+					}
+
+					float f3 = 1.0F - f1;
+					Blender.clearBlend(f3);
+				}
+			}
+		}
+	}
+
+	public static boolean hasSkyLayers(World world) {
+		if (worldSkyLayers == null) {
+			return false;
+		} else {
+			int i = world.provider.getDimensionId();
+
+			if (i >= 0 && i < worldSkyLayers.length) {
+				CustomSkyLayer[] acustomskylayer = worldSkyLayers[i];
+				return acustomskylayer == null ? false : acustomskylayer.length > 0;
+			} else {
+				return false;
+			}
+		}
+	}
+}