content: package net.minecraft.client.model;
  
  import net.minecraft.entity.Entity;
  import net.minecraft.util.MathHelper;
  
  public class ModelZombie extends ModelBiped {
      public ModelZombie() {
          this(0.0F, false);
      }
  
      protected ModelZombie(float modelSize, float p_i1167_2_, int textureWidthIn, int textureHeightIn) {
          super(modelSize, p_i1167_2_, textureWidthIn, textureHeightIn);
      }
  
      public ModelZombie(float modelSize, boolean p_i1168_2_) {
          super(modelSize, 0.0F, 64, p_i1168_2_ ? 32 : 64);
      }
  
      public void setRotationAngles(float limbSwing, float limbSwingAmount, float ageInTicks, float netHeadYaw, float headPitch, float scaleFactor, Entity entityIn) {
          super.setRotationAngles(limbSwing, limbSwingAmount, ageInTicks, netHeadYaw, headPitch, scaleFactor, entityIn);
          float f = MathHelper.sin(this.swingProgress * (float) Math.PI);
          float f1 = MathHelper.sin((1.0F - (1.0F - this.swingProgress) * (1.0F - this.swingProgress)) * (float) Math.PI);
          this.bipedRightArm.rotateAngleZ = 0.0F;
          this.bipedLeftArm.rotateAngleZ = 0.0F;
          this.bipedRightArm.rotateAngleY = -(0.1F - f * 0.6F);
          this.bipedLeftArm.rotateAngleY = 0.1F - f * 0.6F;
          this.bipedRightArm.rotateAngleX = -((float) Math.PI / 2F);
          this.bipedLeftArm.rotateAngleX = -((float) Math.PI / 2F);
          this.bipedRightArm.rotateAngleX -= f * 1.2F - f1 * 0.4F;
          this.bipedLeftArm.rotateAngleX -= f * 1.2F - f1 * 0.4F;
          this.bipedRightArm.rotateAngleZ += MathHelper.cos(ageInTicks * 0.09F) * 0.05F + 0.05F;
          this.bipedLeftArm.rotateAngleZ -= MathHelper.cos(ageInTicks * 0.09F) * 0.05F + 0.05F;
          this.bipedRightArm.rotateAngleX += MathHelper.sin(ageInTicks * 0.067F) * 0.05F;
          this.bipedLeftArm.rotateAngleX -= MathHelper.sin(ageInTicks * 0.067F) * 0.05F;
      }
  }
  