src/game/java/net/minecraft/client/model/ElytraModel.java

package net.minecraft.client.model;

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.HumanoidRenderState;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class ElytraModel extends EntityModel<HumanoidRenderState> {
    public static final MeshTransformer BABY_TRANSFORMER = MeshTransformer.scaling(0.5F);
    private final ModelPart rightWing;
    private final ModelPart leftWing;

    public ElytraModel(ModelPart p_170538_) {
        super(p_170538_);
        this.leftWing = p_170538_.getChild("left_wing");
        this.rightWing = p_170538_.getChild("right_wing");
    }

    public static LayerDefinition createLayer() {
        MeshDefinition meshdefinition = new MeshDefinition();
        PartDefinition partdefinition = meshdefinition.getRoot();
        CubeDeformation cubedeformation = new CubeDeformation(1.0F);
        partdefinition.addOrReplaceChild(
            "left_wing",
            CubeListBuilder.create().texOffs(22, 0).addBox(-10.0F, 0.0F, 0.0F, 10.0F, 20.0F, 2.0F, cubedeformation),
            PartPose.offsetAndRotation(5.0F, 0.0F, 0.0F, (float) (Math.PI / 12), 0.0F, (float) (-Math.PI / 12))
        );
        partdefinition.addOrReplaceChild(
            "right_wing",
            CubeListBuilder.create().texOffs(22, 0).mirror().addBox(0.0F, 0.0F, 0.0F, 10.0F, 20.0F, 2.0F, cubedeformation),
            PartPose.offsetAndRotation(-5.0F, 0.0F, 0.0F, (float) (Math.PI / 12), 0.0F, (float) (Math.PI / 12))
        );
        return LayerDefinition.create(meshdefinition, 64, 32);
    }

    public void setupAnim(HumanoidRenderState p_361175_) {
        super.setupAnim(p_361175_);
        this.leftWing.y = p_361175_.isCrouching ? 3.0F : 0.0F;
        this.leftWing.xRot = p_361175_.elytraRotX;
        this.leftWing.zRot = p_361175_.elytraRotZ;
        this.leftWing.yRot = p_361175_.elytraRotY;
        this.rightWing.yRot = -this.leftWing.yRot;
        this.rightWing.y = this.leftWing.y;
        this.rightWing.xRot = this.leftWing.xRot;
        this.rightWing.zRot = -this.leftWing.zRot;
    }
}