smooth sailing on conveyor belts

src/main/java/api/hbm/conveyor/IConveyorItem.java

@@ -0,0 +1,8 @@
+package api.hbm.conveyor;
+
+import net.minecraft.item.ItemStack;
+
+public interface IConveyorItem {
+
+	public ItemStack getItemStack();
+}

src/main/java/api/hbm/conveyor/IEnterableBlock.java

@@ -0,0 +1,9 @@
+package api.hbm.conveyor;
+
+import net.minecraftforge.common.util.ForgeDirection;
+
+public interface IEnterableBlock {
+
+	public boolean canEnter(IConveyorItem entity, ForgeDirection dir);
+	public void onEnter(IConveyorItem entity, ForgeDirection dir);
+}

src/main/java/com/hbm/entity/item/EntityMovingItem.java

@@ -2,6 +2,9 @@ package com.hbm.entity.item;
 
 import com.hbm.blocks.ModBlocks;
 
+import api.hbm.conveyor.IConveyorItem;
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.item.EntityItem;
 import net.minecraft.entity.player.EntityPlayer;
@@ -12,11 +15,22 @@ import net.minecraft.util.DamageSource;
 import net.minecraft.world.World;
 import net.minecraftforge.common.util.ForgeDirection;
 
-public class EntityMovingItem extends Entity {
+public class EntityMovingItem extends Entity implements IConveyorItem {
+	
+	private int turnProgress;
+	private double syncPosX;
+	private double syncPosY;
+	private double syncPosZ;
+	@SideOnly(Side.CLIENT)
+	private double velocityX;
+	@SideOnly(Side.CLIENT)
+	private double velocityY;
+	@SideOnly(Side.CLIENT)
+	private double velocityZ;
 
 	public EntityMovingItem(World p_i1582_1_) {
 		super(p_i1582_1_);
-        this.setSize(0.5F, 0.25F);
+		this.setSize(0.5F, 0.5F);
 		this.noClip = true;
 	}
 
@@ -76,6 +90,18 @@ public class EntityMovingItem extends Entity {
 
 	public void onUpdate() {
 		
+		if(worldObj.isRemote) {
+			if(this.turnProgress > 0) {
+				double interpX = this.posX + (this.syncPosX - this.posX) / (double) this.turnProgress;
+				double interpY = this.posY + (this.syncPosY - this.posY) / (double) this.turnProgress;
+				double interpZ = this.posZ + (this.syncPosZ - this.posZ) / (double) this.turnProgress;
+				--this.turnProgress;
+				this.setPosition(interpX, interpY, interpZ);
+			} else {
+				this.setPosition(this.posX, this.posY, this.posZ);
+			}
+		}
+
 		if(!worldObj.isRemote) {
 
 			if(worldObj.getBlock((int) Math.floor(posX), (int) Math.floor(posY), (int) Math.floor(posZ)) != ModBlocks.conveyor) {
@@ -114,9 +140,28 @@ public class EntityMovingItem extends Entity {
 
 				schedule--;
 			}
-    	}
+			
 			this.moveEntity(motionX, motionY, motionZ);
 		}
+	}
+	
+	@SideOnly(Side.CLIENT)
+	public void setVelocity(double p_70016_1_, double p_70016_3_, double p_70016_5_) {
+		this.velocityX = this.motionX = p_70016_1_;
+		this.velocityY = this.motionY = p_70016_3_;
+		this.velocityZ = this.motionZ = p_70016_5_;
+	}
+	
+	@SideOnly(Side.CLIENT)
+	public void setPositionAndRotation2(double x, double y, double z, float yaw, float pitch, int theNumberThree) {
+		this.syncPosX = x;
+		this.syncPosY = y;
+		this.syncPosZ = z;
+		this.turnProgress = theNumberThree + 7; //use 4-ply for extra smoothness
+		this.motionX = this.velocityX;
+		this.motionY = this.velocityY;
+		this.motionZ = this.velocityZ;
+	}
 
 	@Override
 	protected void entityInit() {
@@ -145,5 +190,4 @@ public class EntityMovingItem extends Entity {
 
 		nbt.setInteger("schedule", schedule);
 	}
-
 }