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

package net.minecraft.client.model;

import com.mojang.math.Axis;
import net.minecraft.client.model.geom.ModelPart;
import net.minecraft.client.model.geom.PartPose;
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.PartDefinition;
import net.minecraft.client.renderer.entity.EndCrystalRenderer;
import net.minecraft.client.renderer.entity.state.EndCrystalRenderState;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.joml.Quaternionf;

@OnlyIn(Dist.CLIENT)
public class EndCrystalModel extends EntityModel<EndCrystalRenderState> {
    private static final String OUTER_GLASS = "outer_glass";
    private static final String INNER_GLASS = "inner_glass";
    private static final String BASE = "base";
    private static final float SIN_45 = (float)Math.sin(Math.PI / 4);
    public final ModelPart base;
    public final ModelPart outerGlass;
    public final ModelPart innerGlass;
    public final ModelPart cube;

    public EndCrystalModel(ModelPart p_361518_) {
        super(p_361518_);
        this.base = p_361518_.getChild("base");
        this.outerGlass = p_361518_.getChild("outer_glass");
        this.innerGlass = this.outerGlass.getChild("inner_glass");
        this.cube = this.innerGlass.getChild("cube");
    }

    public static LayerDefinition createBodyLayer() {
        MeshDefinition meshdefinition = new MeshDefinition();
        PartDefinition partdefinition = meshdefinition.getRoot();
        float f = 0.875F;
        CubeListBuilder cubelistbuilder = CubeListBuilder.create().texOffs(0, 0).addBox(-4.0F, -4.0F, -4.0F, 8.0F, 8.0F, 8.0F);
        PartDefinition partdefinition1 = partdefinition.addOrReplaceChild("outer_glass", cubelistbuilder, PartPose.offset(0.0F, 24.0F, 0.0F));
        PartDefinition partdefinition2 = partdefinition1.addOrReplaceChild("inner_glass", cubelistbuilder, PartPose.ZERO.withScale(0.875F));
        partdefinition2.addOrReplaceChild(
            "cube", CubeListBuilder.create().texOffs(32, 0).addBox(-4.0F, -4.0F, -4.0F, 8.0F, 8.0F, 8.0F), PartPose.ZERO.withScale(0.765625F)
        );
        partdefinition.addOrReplaceChild("base", CubeListBuilder.create().texOffs(0, 16).addBox(-6.0F, 0.0F, -6.0F, 12.0F, 4.0F, 12.0F), PartPose.ZERO);
        return LayerDefinition.create(meshdefinition, 64, 32);
    }

    public void setupAnim(EndCrystalRenderState p_364224_) {
        super.setupAnim(p_364224_);
        this.base.visible = p_364224_.showsBottom;
        float f = p_364224_.ageInTicks * 3.0F;
        float f1 = EndCrystalRenderer.getY(p_364224_.ageInTicks) * 16.0F;
        this.outerGlass.y += f1 / 2.0F;
        this.outerGlass.rotateBy(Axis.YP.rotationDegrees(f).rotateAxis((float) (Math.PI / 3), SIN_45, 0.0F, SIN_45));
        this.innerGlass.rotateBy(new Quaternionf().setAngleAxis((float) (Math.PI / 3), SIN_45, 0.0F, SIN_45).rotateY(f * (float) (Math.PI / 180.0)));
        this.cube.rotateBy(new Quaternionf().setAngleAxis((float) (Math.PI / 3), SIN_45, 0.0F, SIN_45).rotateY(f * (float) (Math.PI / 180.0)));
    }
}