Code/net/minecraft/client/model/LlamaModel.java

package net.minecraft.client.model;

import java.util.Map.Entry;
import java.util.function.UnaryOperator;
import net.minecraft.client.model.geom.ModelPart;
import net.minecraft.client.model.geom.PartPose;
import net.minecraft.client.model.geom.builders.CubeDeformation;
import net.minecraft.client.model.geom.builders.CubeListBuilder;
import net.minecraft.client.model.geom.builders.LayerDefinition;
import net.minecraft.client.model.geom.builders.MeshDefinition;
import net.minecraft.client.model.geom.builders.MeshTransformer;
import net.minecraft.client.model.geom.builders.PartDefinition;
import net.minecraft.client.renderer.entity.state.LlamaRenderState;
import net.minecraft.util.Mth;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class LlamaModel extends EntityModel<LlamaRenderState> {
    public static final MeshTransformer BABY_TRANSFORMER = LlamaModel::transformToBaby;
    private final ModelPart head;
    private final ModelPart rightHindLeg;
    private final ModelPart leftHindLeg;
    private final ModelPart rightFrontLeg;
    private final ModelPart leftFrontLeg;
    private final ModelPart rightChest;
    private final ModelPart leftChest;

    public LlamaModel(ModelPart p_170724_) {
        super(p_170724_);
        this.head = p_170724_.getChild("head");
        this.rightChest = p_170724_.getChild("right_chest");
        this.leftChest = p_170724_.getChild("left_chest");
        this.rightHindLeg = p_170724_.getChild("right_hind_leg");
        this.leftHindLeg = p_170724_.getChild("left_hind_leg");
        this.rightFrontLeg = p_170724_.getChild("right_front_leg");
        this.leftFrontLeg = p_170724_.getChild("left_front_leg");
    }

    public static LayerDefinition createBodyLayer(CubeDeformation p_170726_) {
        MeshDefinition meshdefinition = new MeshDefinition();
        PartDefinition partdefinition = meshdefinition.getRoot();
        partdefinition.addOrReplaceChild(
            "head",
            CubeListBuilder.create()
                .texOffs(0, 0)
                .addBox(-2.0F, -14.0F, -10.0F, 4.0F, 4.0F, 9.0F, p_170726_)
                .texOffs(0, 14)
                .addBox("neck", -4.0F, -16.0F, -6.0F, 8.0F, 18.0F, 6.0F, p_170726_)
                .texOffs(17, 0)
                .addBox("ear", -4.0F, -19.0F, -4.0F, 3.0F, 3.0F, 2.0F, p_170726_)
                .texOffs(17, 0)
                .addBox("ear", 1.0F, -19.0F, -4.0F, 3.0F, 3.0F, 2.0F, p_170726_),
            PartPose.offset(0.0F, 7.0F, -6.0F)
        );
        partdefinition.addOrReplaceChild(
            "body",
            CubeListBuilder.create().texOffs(29, 0).addBox(-6.0F, -10.0F, -7.0F, 12.0F, 18.0F, 10.0F, p_170726_),
            PartPose.offsetAndRotation(0.0F, 5.0F, 2.0F, (float) (Math.PI / 2), 0.0F, 0.0F)
        );
        partdefinition.addOrReplaceChild(
            "right_chest",
            CubeListBuilder.create().texOffs(45, 28).addBox(-3.0F, 0.0F, 0.0F, 8.0F, 8.0F, 3.0F, p_170726_),
            PartPose.offsetAndRotation(-8.5F, 3.0F, 3.0F, 0.0F, (float) (Math.PI / 2), 0.0F)
        );
        partdefinition.addOrReplaceChild(
            "left_chest",
            CubeListBuilder.create().texOffs(45, 41).addBox(-3.0F, 0.0F, 0.0F, 8.0F, 8.0F, 3.0F, p_170726_),
            PartPose.offsetAndRotation(5.5F, 3.0F, 3.0F, 0.0F, (float) (Math.PI / 2), 0.0F)
        );
        int i = 4;
        int j = 14;
        CubeListBuilder cubelistbuilder = CubeListBuilder.create().texOffs(29, 29).addBox(-2.0F, 0.0F, -2.0F, 4.0F, 14.0F, 4.0F, p_170726_);
        partdefinition.addOrReplaceChild("right_hind_leg", cubelistbuilder, PartPose.offset(-3.5F, 10.0F, 6.0F));
        partdefinition.addOrReplaceChild("left_hind_leg", cubelistbuilder, PartPose.offset(3.5F, 10.0F, 6.0F));
        partdefinition.addOrReplaceChild("right_front_leg", cubelistbuilder, PartPose.offset(-3.5F, 10.0F, -5.0F));
        partdefinition.addOrReplaceChild("left_front_leg", cubelistbuilder, PartPose.offset(3.5F, 10.0F, -5.0F));
        return LayerDefinition.create(meshdefinition, 128, 64);
    }

    private static MeshDefinition transformToBaby(MeshDefinition p_369610_) {
        float f = 2.0F;
        float f1 = 0.7F;
        float f2 = 1.1F;
        UnaryOperator<PartPose> unaryoperator = p_357768_ -> p_357768_.translated(0.0F, 21.0F, 3.52F).scaled(0.71428573F, 0.64935064F, 0.7936508F);
        UnaryOperator<PartPose> unaryoperator1 = p_357767_ -> p_357767_.translated(0.0F, 33.0F, 0.0F).scaled(0.625F, 0.45454544F, 0.45454544F);
        UnaryOperator<PartPose> unaryoperator2 = p_357769_ -> p_357769_.translated(0.0F, 33.0F, 0.0F).scaled(0.45454544F, 0.41322312F, 0.45454544F);
        MeshDefinition meshdefinition = new MeshDefinition();

        for (Entry<String, PartDefinition> entry : p_369610_.getRoot().getChildren()) {
            String s = entry.getKey();
            PartDefinition partdefinition = entry.getValue();

            UnaryOperator<PartPose> unaryoperator3 = switch (s) {
                case "head" -> unaryoperator;
                case "body" -> unaryoperator1;
                default -> unaryoperator2;
            };
            meshdefinition.getRoot().addOrReplaceChild(s, partdefinition.transformed(unaryoperator3));
        }

        return meshdefinition;
    }

    public void setupAnim(LlamaRenderState p_370063_) {
        super.setupAnim(p_370063_);
        this.head.xRot = p_370063_.xRot * (float) (Math.PI / 180.0);
        this.head.yRot = p_370063_.yRot * (float) (Math.PI / 180.0);
        float f = p_370063_.walkAnimationSpeed;
        float f1 = p_370063_.walkAnimationPos;
        this.rightHindLeg.xRot = Mth.cos(f1 * 0.6662F) * 1.4F * f;
        this.leftHindLeg.xRot = Mth.cos(f1 * 0.6662F + (float) Math.PI) * 1.4F * f;
        this.rightFrontLeg.xRot = Mth.cos(f1 * 0.6662F + (float) Math.PI) * 1.4F * f;
        this.leftFrontLeg.xRot = Mth.cos(f1 * 0.6662F) * 1.4F * f;
        this.rightChest.visible = p_370063_.hasChest;
        this.leftChest.visible = p_370063_.hasChest;
    }
}