Animation Mob

this.head.rotateAngleY = f3 / (180F / (float)Math.PI);
this.head.rotateAngleX = f4 / (180F / (float)Math.PI);
this.leftleg.rotateAngleX = MathHelper.cos(f * 1.0F) * -1.0F * f1;
this.rightleg.rotateAngleX = MathHelper.cos(f * 1.0F) * 1.0F * f1;
this.rightarm.rotateAngleX = MathHelper.cos(f * 0.6662F + (float)Math.PI) * 2.0F * f1 * 0.5F;
this.leftarm.rotateAngleX = MathHelper.cos(f * 0.6662F + (float)Math.PI) * 2.0F * f1 * 0.5F;