001    package net.minecraft.src;
002    
003    public class EntityMoveHelper
004    {
005        /** The EntityLiving that is being moved */
006        private EntityLiving entity;
007        private double posX;
008        private double posY;
009        private double posZ;
010    
011        /** The speed at which the entity should move */
012        private float speed;
013        private boolean field_75643_f = false;
014    
015        public EntityMoveHelper(EntityLiving par1EntityLiving)
016        {
017            this.entity = par1EntityLiving;
018            this.posX = par1EntityLiving.posX;
019            this.posY = par1EntityLiving.posY;
020            this.posZ = par1EntityLiving.posZ;
021        }
022    
023        public boolean func_75640_a()
024        {
025            return this.field_75643_f;
026        }
027    
028        public float getSpeed()
029        {
030            return this.speed;
031        }
032    
033        /**
034         * Sets the speed and location to move to
035         */
036        public void setMoveTo(double par1, double par3, double par5, float par7)
037        {
038            this.posX = par1;
039            this.posY = par3;
040            this.posZ = par5;
041            this.speed = par7;
042            this.field_75643_f = true;
043        }
044    
045        public void onUpdateMoveHelper()
046        {
047            this.entity.setMoveForward(0.0F);
048    
049            if (this.field_75643_f)
050            {
051                this.field_75643_f = false;
052                int var1 = MathHelper.floor_double(this.entity.boundingBox.minY + 0.5D);
053                double var2 = this.posX - this.entity.posX;
054                double var4 = this.posZ - this.entity.posZ;
055                double var6 = this.posY - (double)var1;
056                double var8 = var2 * var2 + var6 * var6 + var4 * var4;
057    
058                if (var8 >= 2.500000277905201E-7D)
059                {
060                    float var10 = (float)(Math.atan2(var4, var2) * 180.0D / Math.PI) - 90.0F;
061                    this.entity.rotationYaw = this.func_75639_a(this.entity.rotationYaw, var10, 30.0F);
062                    this.entity.setAIMoveSpeed(this.speed * this.entity.getSpeedModifier());
063    
064                    if (var6 > 0.0D && var2 * var2 + var4 * var4 < 1.0D)
065                    {
066                        this.entity.getJumpHelper().setJumping();
067                    }
068                }
069            }
070        }
071    
072        private float func_75639_a(float par1, float par2, float par3)
073        {
074            float var4 = MathHelper.wrapAngleTo180_float(par2 - par1);
075    
076            if (var4 > par3)
077            {
078                var4 = par3;
079            }
080    
081            if (var4 < -par3)
082            {
083                var4 = -par3;
084            }
085    
086            return par1 + var4;
087        }
088    }