# Pastebin v5DRCuVu
package uk.co.haxyshideout.ashtest.events;

import com.pixelmonmod.pixelmon.Pixelmon;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.TickEvent;
import net.minecraft.client.Minecraft;
import net.minecraft.client.multiplayer.WorldClient;
import net.minecraft.client.renderer.EntityRenderer;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.WorldServer;
import net.minecraft.world.biome.BiomeGenBase;
import net.minecraftforge.client.IRenderHandler;
import net.minecraftforge.client.event.RenderPlayerEvent;
import net.minecraftforge.client.event.RenderWorldEvent;
import net.minecraftforge.client.event.RenderWorldLastEvent;
import org.lwjgl.opengl.GL11;

import java.util.Random;

/**
 * Created by clienthax on 31/1/2015.
 */
public class EventListener {


	float[] ashXCoords = null;
	float[] ashYCoords = null;
	int rendererUpdateCount = 0;
	Random random = new Random();
	ResourceLocation locationSnowPng = new ResourceLocation(Pixelmon.MODID, "textures/environment/ash.png");


	@SubscribeEvent
	public void onRender(RenderWorldLastEvent event) {
		renderRainSnow(event.partialTicks);
	}

	protected void renderRainSnow(float p_78474_1_)
	{

		Minecraft mc = Minecraft.getMinecraft();
		EntityRenderer entityRenderer = mc.entityRenderer;


		IRenderHandler renderer = null;
		if ((renderer = mc.theWorld.provider.getWeatherRenderer()) != null)
		{
			renderer.render(p_78474_1_, mc.theWorld, mc);
			return;
		}

		float ashStrength = 20;

		if (ashStrength > 0.0F)
		{
			entityRenderer.enableLightmap((double) p_78474_1_);

			if (this.ashXCoords == null)
			{
				this.ashXCoords = new float[1024];
				this.ashYCoords = new float[1024];

				for (int i = 0; i < 32; ++i)
				{
					for (int j = 0; j < 32; ++j)
					{
						float f2 = (float)(j - 16);
						float f3 = (float)(i - 16);
						float f4 = MathHelper.sqrt_float(f2 * f2 + f3 * f3);
						this.ashXCoords[i << 5 | j] = -f3 / f4;
						this.ashYCoords[i << 5 | j] = f2 / f4;
					}
				}
			}

			EntityLivingBase entitylivingbase = mc.renderViewEntity;
			WorldClient worldclient = mc.theWorld;
			int k2 = MathHelper.floor_double(entitylivingbase.posX);
			int l2 = MathHelper.floor_double(entitylivingbase.posY);
			int i3 = MathHelper.floor_double(entitylivingbase.posZ);
			Tessellator tessellator = Tessellator.instance;
			GL11.glDisable(GL11.GL_CULL_FACE);
			GL11.glNormal3f(0.0F, 1.0F, 0.0F);
			GL11.glEnable(GL11.GL_BLEND);
			OpenGlHelper.glBlendFunc(770, 771, 1, 0);
			GL11.glAlphaFunc(GL11.GL_GREATER, 0.1F);
			double d0 = entitylivingbase.lastTickPosX + (entitylivingbase.posX - entitylivingbase.lastTickPosX) * (double)p_78474_1_;
			double d1 = entitylivingbase.lastTickPosY + (entitylivingbase.posY - entitylivingbase.lastTickPosY) * (double)p_78474_1_;
			double d2 = entitylivingbase.lastTickPosZ + (entitylivingbase.posZ - entitylivingbase.lastTickPosZ) * (double)p_78474_1_;
			int k = MathHelper.floor_double(d1);
			byte b0 = 5;

			if (mc.gameSettings.fancyGraphics)
			{
				b0 = 10;
			}

			boolean flag = false;
			byte b1 = -1;
			float f5 = (float)rendererUpdateCount + p_78474_1_;

			if (mc.gameSettings.fancyGraphics)
			{
				b0 = 10;
			}

			GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
			flag = false;

			for (int l = i3 - b0; l <= i3 + b0; ++l)
			{
				for (int i1 = k2 - b0; i1 <= k2 + b0; ++i1)
				{
					int j1 = (l - i3 + 16) * 32 + i1 - k2 + 16;
					float f6 = this.ashXCoords[j1] * 0.5F;
					float f7 = this.ashYCoords[j1] * 0.5F;
					BiomeGenBase biomegenbase = worldclient.getBiomeGenForCoords(i1, l);

					if (biomegenbase.canSpawnLightningBolt() || biomegenbase.getEnableSnow())
					{
						int k1 = worldclient.getPrecipitationHeight(i1, l);
						int l1 = l2 - b0;
						int i2 = l2 + b0;

						if (l1 < k1)
						{
							l1 = k1;
						}

						if (i2 < k1)
						{
							i2 = k1;
						}

						float f8 = 1.0F;
						int j2 = k1;

						if (k1 < k)
						{
							j2 = k;
						}

						if (l1 != i2)
						{
							this.random.setSeed((long)(i1 * i1 * 3121 + i1 * 45238971 ^ l * l * 418711 + l * 13761));
							float f9 = biomegenbase.getFloatTemperature(i1, l1, l);
							float f10;
							double d4;

							//do biome check here
							if (1 == 1)
							{
								if (b1 != 1)
								{
									if (b1 >= 0)
									{
										tessellator.draw();
									}

									b1 = 1;
									mc.getTextureManager().bindTexture(locationSnowPng);
									tessellator.startDrawingQuads();
								}

								f10 = ((float)(this.rendererUpdateCount & 511) + p_78474_1_) / 512.0F;
								float f16 = this.random.nextFloat() + f5 * 0.01F * (float)this.random.nextGaussian();
								float f11 = this.random.nextFloat() + f5 * (float)this.random.nextGaussian() * 0.001F;
								d4 = (double)((float)i1 + 0.5F) - entitylivingbase.posX;
								double d5 = (double)((float)l + 0.5F) - entitylivingbase.posZ;
								float f14 = MathHelper.sqrt_double(d4 * d4 + d5 * d5) / (float)b0;
								float f15 = 1.0F;
								tessellator.setBrightness((worldclient.getLightBrightnessForSkyBlocks(i1, j2, l, 0) * 3 + 15728880) / 4);
								tessellator.setColorRGBA_F(f15, f15, f15, ((1.0F - f14 * f14) * 0.3F + 0.5F) * ashStrength);
								tessellator.setTranslation(-d0 * 1.0D, -d1 * 1.0D, -d2 * 1.0D);
								tessellator.addVertexWithUV((double)((float)i1 - f6) + 0.5D, (double)l1, (double)((float)l - f7) + 0.5D, (double)(0.0F * f8 + f16), (double)((float)l1 * f8 / 4.0F + f10 * f8 + f11));
								tessellator.addVertexWithUV((double)((float)i1 + f6) + 0.5D, (double)l1, (double)((float)l + f7) + 0.5D, (double)(1.0F * f8 + f16), (double)((float)l1 * f8 / 4.0F + f10 * f8 + f11));
								tessellator.addVertexWithUV((double)((float)i1 + f6) + 0.5D, (double)i2, (double)((float)l + f7) + 0.5D, (double)(1.0F * f8 + f16), (double)((float)i2 * f8 / 4.0F + f10 * f8 + f11));
								tessellator.addVertexWithUV((double)((float)i1 - f6) + 0.5D, (double)i2, (double)((float)l - f7) + 0.5D, (double)(0.0F * f8 + f16), (double)((float)i2 * f8 / 4.0F + f10 * f8 + f11));
								tessellator.setTranslation(0.0D, 0.0D, 0.0D);
							}
						}
					}
				}
			}

			if (b1 >= 0)
			{
				tessellator.draw();
			}

			GL11.glEnable(GL11.GL_CULL_FACE);
			GL11.glDisable(GL11.GL_BLEND);
			GL11.glAlphaFunc(GL11.GL_GREATER, 0.1F);
			entityRenderer.disableLightmap((double) p_78474_1_);
		}
	}


}