EntityBallOMossFX.java

package com.cricketcraft.chisel.entity.fx;

import net.minecraft.client.particle.EntityFX;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.util.IIcon;
import net.minecraft.world.World;

import org.lwjgl.opengl.GL11;

import com.cricketcraft.chisel.block.BlockSnakestoneObsidian;
import com.cricketcraft.chisel.init.ChiselItems;
import com.cricketcraft.chisel.utils.General;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class EntityBallOMossFX extends EntityFX {

	BlockSnakestoneObsidian block;
	double tx, ty, tz;
	double speed;

	float u0, u1, v0, v1;
	IIcon icon;
	IIcon iconPlus = new IIcon() {

		@Override
		@SideOnly(Side.CLIENT)
		public int getIconWidth() {
			return 0;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public int getIconHeight() {
			return 0;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getMinU() {
			return u0;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getMaxU() {
			return u1;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getInterpolatedU(double d0) {
			return (float) (u0 + d0 * (u1 - u0) / 16.0f);
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getMinV() {
			return v0;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getMaxV() {
			return v1;
		}

		@Override
		@SideOnly(Side.CLIENT)
		public float getInterpolatedV(double d0) {
			return (float) (v0 + d0 * (v1 - v0) / 16.0f);
		}

		@Override
		@SideOnly(Side.CLIENT)
		public String getIconName() {
			return "";
		}

	};

	public EntityBallOMossFX(World world, double x, double y, double z) {
		super(world, x, y + 0.5, z, 0, 0, 0);

		particleScale = 0.5f + 0.5f * General.rand.nextFloat();
		speed = 0.4 + 0.4 * General.rand.nextDouble();

		particleMaxAge = (int) (General.rand.nextDouble() * 10.0) + 5;
		if (General.rand.nextInt(10) == 0)
			particleMaxAge += General.rand.nextDouble() * 40.0;

		motionX = (General.rand.nextDouble() - 0.5) * 0.7;
		motionY = (General.rand.nextDouble() * 0.5) * 0.7;
		motionZ = (General.rand.nextDouble() - 0.5) * 0.7;
		particleGravity = 2.0f;

		// setParticleIcon(block.particles[General.rand.nextInt(block.particles.length)]);

		icon = ChiselItems.ballomoss.getIconFromDamage(0);
		float width = 4.0f + General.rand.nextFloat() * 8.0f;
		float uu = General.rand.nextFloat() * (16.0f - width);
		float vv = General.rand.nextFloat() * (16.0f - width);
		u0 = icon.getInterpolatedU(uu);
		u1 = icon.getInterpolatedU(uu + width);
		v0 = icon.getInterpolatedV(vv);
		v1 = icon.getInterpolatedV(vv + width);

		setParticleIcon(iconPlus);
	}

	@Override
	public int getFXLayer() {
		return 2;
	}

	@Override
	public void renderParticle(Tessellator tessellator, float partialTick, float rotX, float rotXZ, float rotZ, float rotYZ, float rotXY) {
		GL11.glDepthMask(false);
		GL11.glEnable(3042);
		GL11.glBlendFunc(770, 771);
		super.renderParticle(tessellator, partialTick, rotX, rotXZ, rotZ, rotYZ, rotXY);
	}

	@Override
	public void onUpdate() {
		super.onUpdate();

		double remaining = particleMaxAge - particleAge;

		if (remaining < 5) {
			particleAlpha = (float) (remaining / 5.0);
		} else {
			particleAlpha = 1.0f;
		}
	}

}