001package net.minecraft.entity.ai;
002
003import net.minecraft.entity.EntityLiving;
004
005public class EntityAILookIdle extends EntityAIBase
006{
007    /** The entity that is looking idle. */
008    private EntityLiving idleEntity;
009
010    /** X offset to look at */
011    private double lookX;
012
013    /** Z offset to look at */
014    private double lookZ;
015
016    /**
017     * A decrementing tick that stops the entity from being idle once it reaches 0.
018     */
019    private int idleTime = 0;
020
021    public EntityAILookIdle(EntityLiving par1EntityLiving)
022    {
023        this.idleEntity = par1EntityLiving;
024        this.setMutexBits(3);
025    }
026
027    /**
028     * Returns whether the EntityAIBase should begin execution.
029     */
030    public boolean shouldExecute()
031    {
032        return this.idleEntity.getRNG().nextFloat() < 0.02F;
033    }
034
035    /**
036     * Returns whether an in-progress EntityAIBase should continue executing
037     */
038    public boolean continueExecuting()
039    {
040        return this.idleTime >= 0;
041    }
042
043    /**
044     * Execute a one shot task or start executing a continuous task
045     */
046    public void startExecuting()
047    {
048        double var1 = (Math.PI * 2D) * this.idleEntity.getRNG().nextDouble();
049        this.lookX = Math.cos(var1);
050        this.lookZ = Math.sin(var1);
051        this.idleTime = 20 + this.idleEntity.getRNG().nextInt(20);
052    }
053
054    /**
055     * Updates the task
056     */
057    public void updateTask()
058    {
059        --this.idleTime;
060        this.idleEntity.getLookHelper().setLookPosition(this.idleEntity.posX + this.lookX, this.idleEntity.posY + (double)this.idleEntity.getEyeHeight(), this.idleEntity.posZ + this.lookZ, 10.0F, (float)this.idleEntity.getVerticalFaceSpeed());
061    }
062}