minecraft-kajetans-mod/src/main/java/me/km/entities/RenderHuman.java

package me.km.entities;

import net.minecraft.client.Minecraft;
import net.minecraft.client.model.ModelBiped;
import net.minecraft.client.model.ModelPlayer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.entity.RenderLivingBase;
import net.minecraft.client.renderer.entity.layers.LayerArrow;
import net.minecraft.client.renderer.entity.layers.LayerBipedArmor;
import net.minecraft.client.renderer.entity.layers.LayerCustomHead;
import net.minecraft.client.renderer.entity.layers.LayerElytra;
import net.minecraft.client.renderer.entity.layers.LayerHeldItem;
import net.minecraft.item.EnumAction;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumHandSide;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class RenderHuman extends RenderLivingBase<EntityHuman>
{ 
    /** this field is used to indicate the 3-pixel wide arms */
    private final ModelHuman steve;
    private final ModelHuman alex;

    public RenderHuman()
    {
        super(Minecraft.getMinecraft().getRenderManager(), new ModelHuman(0, false), 0.5f);
        this.addLayer(new LayerBipedArmor(this));
        this.addLayer(new LayerHeldItem(this));
        this.addLayer(new LayerArrow(this));
        this.addLayer(new LayerCustomHead(this.getMainModel().bipedHead));
        this.addLayer(new LayerElytra(this));
        
        this.steve = this.getMainModel();
        this.alex = new ModelHuman(0, true);
    }

    @Override
    public final ModelHuman getMainModel()
    {
        return (ModelHuman) super.getMainModel();
    }

    @Override
    public void doRender(EntityHuman h, double x, double y, double z, float entityYaw, float partialTicks)
    {
        double d0 = y;
        if (h.isSneaking())
        {
            d0 = y - 0.125D;
        }
        this.setModelVisibilities(h);
        GlStateManager.enableBlendProfile(GlStateManager.Profile.PLAYER_SKIN);
        if(h.isSlim())
        {
            this.mainModel = alex;
            super.doRender(h, x, d0, z, entityYaw, partialTicks);
            this.mainModel = steve;
        }
        else
        {
            super.doRender(h, x, d0, z, entityYaw, partialTicks);
        }
        GlStateManager.disableBlendProfile(GlStateManager.Profile.PLAYER_SKIN);
    }

    private void setModelVisibilities(EntityHuman h)
    {
        ModelPlayer modelplayer = this.getMainModel();
        
        modelplayer.setVisible(true);
        modelplayer.bipedHeadwear.showModel = true;
        modelplayer.bipedBodyWear.showModel = true;
        modelplayer.bipedLeftLegwear.showModel = true;
        modelplayer.bipedRightLegwear.showModel = true;
        modelplayer.bipedLeftArmwear.showModel = true;
        modelplayer.bipedRightArmwear.showModel = true;
        modelplayer.isSneak = false;
        ModelBiped.ArmPose modelbiped$armpose = ModelBiped.ArmPose.EMPTY;
        ModelBiped.ArmPose modelbiped$armpose1 = ModelBiped.ArmPose.EMPTY;

        ItemStack mainHand = h.getHeldItemMainhand();
        
        if (!mainHand.isEmpty())
        {
            modelbiped$armpose = ModelBiped.ArmPose.ITEM;

            if (h.getItemInUseCount() > 0)
            {
                EnumAction enumaction = mainHand.getItemUseAction();

                if (enumaction == EnumAction.BLOCK)
                {
                    modelbiped$armpose = ModelBiped.ArmPose.BLOCK;
                }
                else if (enumaction == EnumAction.BOW)
                {
                    modelbiped$armpose = ModelBiped.ArmPose.BOW_AND_ARROW;
                }
            }
        }
        
        ItemStack offHand = h.getHeldItemMainhand();

        if (!offHand.isEmpty())
        {
            modelbiped$armpose1 = ModelBiped.ArmPose.ITEM;

            if (h.getItemInUseCount() > 0)
            {
                EnumAction enumaction1 = offHand.getItemUseAction();

                if (enumaction1 == EnumAction.BLOCK)
                {
                    modelbiped$armpose1 = ModelBiped.ArmPose.BLOCK;
                }
                // FORGE: fix MC-88356 allow offhand to use bow and arrow animation
                else if (enumaction1 == EnumAction.BOW)
                {
                    modelbiped$armpose1 = ModelBiped.ArmPose.BOW_AND_ARROW;
                }
            }
        }

        if (h.getPrimaryHand() == EnumHandSide.RIGHT)
        {
            modelplayer.rightArmPose = modelbiped$armpose;
            modelplayer.leftArmPose = modelbiped$armpose1;
        }
        else
        {
            modelplayer.rightArmPose = modelbiped$armpose1;
            modelplayer.leftArmPose = modelbiped$armpose;
        }
    }
    
    @Override
    public ResourceLocation getEntityTexture(EntityHuman h)
    {
        return h.getTexture();
    }

    @Override
    public void transformHeldFull3DItemLayer()
    {
        GlStateManager.translate(0.0F, 0.1875F, 0.0F);
    }

    @Override
    protected void preRenderCallback(EntityHuman entitylivingbaseIn, float partialTickTime)
    {
        GlStateManager.scale(0.9375F, 0.9375F, 0.9375F);
    }
}