package net.minecraft.entity.ai;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLiving;
import net.minecraft.util.MathHelper;
public class EntityLookHelper
{
private EntityLiving entity;
/**
* The amount of change that is made each update for an entity facing a direction.
*/
private float deltaLookYaw;
/**
* The amount of change that is made each update for an entity facing a direction.
*/
private float deltaLookPitch;
/** Whether or not the entity is trying to look at something. */
private boolean isLooking = false;
private double posX;
private double posY;
private double posZ;
public EntityLookHelper(EntityLiving par1EntityLiving)
{
this.entity = par1EntityLiving;
}
/**
* Sets position to look at using entity
*/
public void setLookPositionWithEntity(Entity par1Entity, float par2, float par3)
{
this.posX = par1Entity.posX;
if (par1Entity instanceof EntityLiving)
{
this.posY = par1Entity.posY + (double)par1Entity.getEyeHeight();
}
else
{
this.posY = (par1Entity.boundingBox.minY + par1Entity.boundingBox.maxY) / 2.0D;
}
this.posZ = par1Entity.posZ;
this.deltaLookYaw = par2;
this.deltaLookPitch = par3;
this.isLooking = true;
}
/**
* Sets position to look at
*/
public void setLookPosition(double par1, double par3, double par5, float par7, float par8)
{
this.posX = par1;
this.posY = par3;
this.posZ = par5;
this.deltaLookYaw = par7;
this.deltaLookPitch = par8;
this.isLooking = true;
}
/**
* Updates look
*/
public void onUpdateLook()
{
this.entity.rotationPitch = 0.0F;
if (this.isLooking)
{
this.isLooking = false;
double var1 = this.posX - this.entity.posX;
double var3 = this.posY - (this.entity.posY + (double)this.entity.getEyeHeight());
double var5 = this.posZ - this.entity.posZ;
double var7 = (double)MathHelper.sqrt_double(var1 * var1 + var5 * var5);
float var9 = (float)(Math.atan2(var5, var1) * 180.0D / Math.PI) - 90.0F;
float var10 = (float)(-(Math.atan2(var3, var7) * 180.0D / Math.PI));
this.entity.rotationPitch = this.updateRotation(this.entity.rotationPitch, var10, this.deltaLookPitch);
this.entity.rotationYawHead = this.updateRotation(this.entity.rotationYawHead, var9, this.deltaLookYaw);
}
else
{
this.entity.rotationYawHead = this.updateRotation(this.entity.rotationYawHead, this.entity.renderYawOffset, 10.0F);
}
float var11 = MathHelper.wrapAngleTo180_float(this.entity.rotationYawHead - this.entity.renderYawOffset);
if (!this.entity.getNavigator().noPath())
{
if (var11 < -75.0F)
{
this.entity.rotationYawHead = this.entity.renderYawOffset - 75.0F;
}
if (var11 > 75.0F)
{
this.entity.rotationYawHead = this.entity.renderYawOffset + 75.0F;
}
}
}
private float updateRotation(float par1, float par2, float par3)
{
float var4 = MathHelper.wrapAngleTo180_float(par2 - par1);
if (var4 > par3)
{
var4 = par3;
}
if (var4 < -par3)
{
var4 = -par3;
}
return par1 + var4;
}
}