src/game/java/net/minecraft/client/model/geom/ModelPart.java

package net.minecraft.client.model.geom;

import com.mojang.blaze3d.vertex.PoseStack;
import com.mojang.blaze3d.vertex.VertexConsumer;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.stream.Stream;
import net.minecraft.core.Direction;
import net.minecraft.util.RandomSource;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.joml.Matrix3f;
import org.joml.Matrix4f;
import org.joml.Quaternionf;
import org.joml.Vector3f;

@OnlyIn(Dist.CLIENT)
public final class ModelPart {
    public static final float DEFAULT_SCALE = 1.0F;
    public float x;
    public float y;
    public float z;
    public float xRot;
    public float yRot;
    public float zRot;
    public float xScale = 1.0F;
    public float yScale = 1.0F;
    public float zScale = 1.0F;
    public boolean visible = true;
    public boolean skipDraw;
    private final List<ModelPart.Cube> cubes;
    private final Map<String, ModelPart> children;
    private PartPose initialPose = PartPose.ZERO;

    public ModelPart(List<ModelPart.Cube> p_171306_, Map<String, ModelPart> p_171307_) {
        this.cubes = p_171306_;
        this.children = p_171307_;
    }

    public PartPose storePose() {
        return PartPose.offsetAndRotation(this.x, this.y, this.z, this.xRot, this.yRot, this.zRot);
    }

    public PartPose getInitialPose() {
        return this.initialPose;
    }

    public void setInitialPose(PartPose p_233561_) {
        this.initialPose = p_233561_;
    }

    public void resetPose() {
        this.loadPose(this.initialPose);
    }

    public void loadPose(PartPose p_171323_) {
        this.x = p_171323_.x();
        this.y = p_171323_.y();
        this.z = p_171323_.z();
        this.xRot = p_171323_.xRot();
        this.yRot = p_171323_.yRot();
        this.zRot = p_171323_.zRot();
        this.xScale = p_171323_.xScale();
        this.yScale = p_171323_.yScale();
        this.zScale = p_171323_.zScale();
    }

    public void copyFrom(ModelPart p_104316_) {
        this.xScale = p_104316_.xScale;
        this.yScale = p_104316_.yScale;
        this.zScale = p_104316_.zScale;
        this.xRot = p_104316_.xRot;
        this.yRot = p_104316_.yRot;
        this.zRot = p_104316_.zRot;
        this.x = p_104316_.x;
        this.y = p_104316_.y;
        this.z = p_104316_.z;
    }

    public boolean hasChild(String p_233563_) {
        return this.children.containsKey(p_233563_);
    }

    public ModelPart getChild(String p_171325_) {
        ModelPart modelpart = this.children.get(p_171325_);
        if (modelpart == null) {
            throw new NoSuchElementException("Can't find part " + p_171325_);
        } else {
            return modelpart;
        }
    }

    public void setPos(float p_104228_, float p_104229_, float p_104230_) {
        this.x = p_104228_;
        this.y = p_104229_;
        this.z = p_104230_;
    }

    public void setRotation(float p_171328_, float p_171329_, float p_171330_) {
        this.xRot = p_171328_;
        this.yRot = p_171329_;
        this.zRot = p_171330_;
    }

    public void render(PoseStack p_104302_, VertexConsumer p_104303_, int p_104304_, int p_104305_) {
        this.render(p_104302_, p_104303_, p_104304_, p_104305_, -1);
    }

    public void render(PoseStack p_104307_, VertexConsumer p_104308_, int p_104309_, int p_104310_, int p_343158_) {
        if (this.visible) {
            if (!this.cubes.isEmpty() || !this.children.isEmpty()) {
                p_104307_.pushPose();
                this.translateAndRotate(p_104307_);
                if (!this.skipDraw) {
                    this.compile(p_104307_.last(), p_104308_, p_104309_, p_104310_, p_343158_);
                }

                for (ModelPart modelpart : this.children.values()) {
                    modelpart.render(p_104307_, p_104308_, p_104309_, p_104310_, p_343158_);
                }

                p_104307_.popPose();
            }
        }
    }

    public void rotateBy(Quaternionf p_365235_) {
        Matrix3f matrix3f = new Matrix3f().rotationZYX(this.zRot, this.yRot, this.xRot);
        Matrix3f matrix3f1 = matrix3f.rotate(p_365235_);
        Vector3f vector3f = matrix3f1.getEulerAnglesZYX(new Vector3f());
        this.setRotation(vector3f.x, vector3f.y, vector3f.z);
    }

    public void visit(PoseStack p_171310_, ModelPart.Visitor p_171311_) {
        this.visit(p_171310_, p_171311_, "");
    }

    private void visit(PoseStack p_171313_, ModelPart.Visitor p_171314_, String p_171315_) {
        if (!this.cubes.isEmpty() || !this.children.isEmpty()) {
            p_171313_.pushPose();
            this.translateAndRotate(p_171313_);
            PoseStack.Pose posestack$pose = p_171313_.last();

            for (int i = 0; i < this.cubes.size(); i++) {
                p_171314_.visit(posestack$pose, p_171315_, i, this.cubes.get(i));
            }

            String s = p_171315_ + "/";
            this.children.forEach((p_171320_, p_171321_) -> p_171321_.visit(p_171313_, p_171314_, s + p_171320_));
            p_171313_.popPose();
        }
    }

    public void translateAndRotate(PoseStack p_104300_) {
        p_104300_.translate(this.x / 16.0F, this.y / 16.0F, this.z / 16.0F);
        if (this.xRot != 0.0F || this.yRot != 0.0F || this.zRot != 0.0F) {
            p_104300_.mulPose(new Quaternionf().rotationZYX(this.zRot, this.yRot, this.xRot));
        }

        if (this.xScale != 1.0F || this.yScale != 1.0F || this.zScale != 1.0F) {
            p_104300_.scale(this.xScale, this.yScale, this.zScale);
        }
    }

    private void compile(PoseStack.Pose p_104291_, VertexConsumer p_104292_, int p_104293_, int p_104294_, int p_343687_) {
        for (ModelPart.Cube modelpart$cube : this.cubes) {
            modelpart$cube.compile(p_104291_, p_104292_, p_104293_, p_104294_, p_343687_);
        }
    }

    public ModelPart.Cube getRandomCube(RandomSource p_233559_) {
        return this.cubes.get(p_233559_.nextInt(this.cubes.size()));
    }

    public boolean isEmpty() {
        return this.cubes.isEmpty();
    }

    public void offsetPos(Vector3f p_253873_) {
        this.x = this.x + p_253873_.x();
        this.y = this.y + p_253873_.y();
        this.z = this.z + p_253873_.z();
    }

    public void offsetRotation(Vector3f p_253983_) {
        this.xRot = this.xRot + p_253983_.x();
        this.yRot = this.yRot + p_253983_.y();
        this.zRot = this.zRot + p_253983_.z();
    }

    public void offsetScale(Vector3f p_253957_) {
        this.xScale = this.xScale + p_253957_.x();
        this.yScale = this.yScale + p_253957_.y();
        this.zScale = this.zScale + p_253957_.z();
    }

    public Stream<ModelPart> getAllParts() {
        return Stream.concat(Stream.of(this), this.children.values().stream().flatMap(ModelPart::getAllParts));
    }

    @OnlyIn(Dist.CLIENT)
    public static class Cube {
        public final ModelPart.Polygon[] polygons;
        public final float minX;
        public final float minY;
        public final float minZ;
        public final float maxX;
        public final float maxY;
        public final float maxZ;

        public Cube(
            int p_273701_,
            int p_273034_,
            float p_272824_,
            float p_273777_,
            float p_273748_,
            float p_273722_,
            float p_273763_,
            float p_272823_,
            float p_272945_,
            float p_272790_,
            float p_272870_,
            boolean p_273589_,
            float p_273591_,
            float p_273313_,
            Set<Direction> p_273291_
        ) {
            this.minX = p_272824_;
            this.minY = p_273777_;
            this.minZ = p_273748_;
            this.maxX = p_272824_ + p_273722_;
            this.maxY = p_273777_ + p_273763_;
            this.maxZ = p_273748_ + p_272823_;
            this.polygons = new ModelPart.Polygon[p_273291_.size()];
            float f = p_272824_ + p_273722_;
            float f1 = p_273777_ + p_273763_;
            float f2 = p_273748_ + p_272823_;
            p_272824_ -= p_272945_;
            p_273777_ -= p_272790_;
            p_273748_ -= p_272870_;
            f += p_272945_;
            f1 += p_272790_;
            f2 += p_272870_;
            if (p_273589_) {
                float f3 = f;
                f = p_272824_;
                p_272824_ = f3;
            }

            ModelPart.Vertex modelpart$vertex7 = new ModelPart.Vertex(p_272824_, p_273777_, p_273748_, 0.0F, 0.0F);
            ModelPart.Vertex modelpart$vertex = new ModelPart.Vertex(f, p_273777_, p_273748_, 0.0F, 8.0F);
            ModelPart.Vertex modelpart$vertex1 = new ModelPart.Vertex(f, f1, p_273748_, 8.0F, 8.0F);
            ModelPart.Vertex modelpart$vertex2 = new ModelPart.Vertex(p_272824_, f1, p_273748_, 8.0F, 0.0F);
            ModelPart.Vertex modelpart$vertex3 = new ModelPart.Vertex(p_272824_, p_273777_, f2, 0.0F, 0.0F);
            ModelPart.Vertex modelpart$vertex4 = new ModelPart.Vertex(f, p_273777_, f2, 0.0F, 8.0F);
            ModelPart.Vertex modelpart$vertex5 = new ModelPart.Vertex(f, f1, f2, 8.0F, 8.0F);
            ModelPart.Vertex modelpart$vertex6 = new ModelPart.Vertex(p_272824_, f1, f2, 8.0F, 0.0F);
            float f4 = (float)p_273701_;
            float f5 = (float)p_273701_ + p_272823_;
            float f6 = (float)p_273701_ + p_272823_ + p_273722_;
            float f7 = (float)p_273701_ + p_272823_ + p_273722_ + p_273722_;
            float f8 = (float)p_273701_ + p_272823_ + p_273722_ + p_272823_;
            float f9 = (float)p_273701_ + p_272823_ + p_273722_ + p_272823_ + p_273722_;
            float f10 = (float)p_273034_;
            float f11 = (float)p_273034_ + p_272823_;
            float f12 = (float)p_273034_ + p_272823_ + p_273763_;
            int i = 0;
            if (p_273291_.contains(Direction.DOWN)) {
                this.polygons[i++] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex4, modelpart$vertex3, modelpart$vertex7, modelpart$vertex},
                    f5,
                    f10,
                    f6,
                    f11,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.DOWN
                );
            }

            if (p_273291_.contains(Direction.UP)) {
                this.polygons[i++] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex1, modelpart$vertex2, modelpart$vertex6, modelpart$vertex5},
                    f6,
                    f11,
                    f7,
                    f10,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.UP
                );
            }

            if (p_273291_.contains(Direction.WEST)) {
                this.polygons[i++] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex7, modelpart$vertex3, modelpart$vertex6, modelpart$vertex2},
                    f4,
                    f11,
                    f5,
                    f12,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.WEST
                );
            }

            if (p_273291_.contains(Direction.NORTH)) {
                this.polygons[i++] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex, modelpart$vertex7, modelpart$vertex2, modelpart$vertex1},
                    f5,
                    f11,
                    f6,
                    f12,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.NORTH
                );
            }

            if (p_273291_.contains(Direction.EAST)) {
                this.polygons[i++] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex4, modelpart$vertex, modelpart$vertex1, modelpart$vertex5},
                    f6,
                    f11,
                    f8,
                    f12,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.EAST
                );
            }

            if (p_273291_.contains(Direction.SOUTH)) {
                this.polygons[i] = new ModelPart.Polygon(
                    new ModelPart.Vertex[]{modelpart$vertex3, modelpart$vertex4, modelpart$vertex5, modelpart$vertex6},
                    f8,
                    f11,
                    f9,
                    f12,
                    p_273591_,
                    p_273313_,
                    p_273589_,
                    Direction.SOUTH
                );
            }
        }

        public void compile(PoseStack.Pose p_171333_, VertexConsumer p_171334_, int p_171335_, int p_171336_, int p_344599_) {
            Matrix4f matrix4f = p_171333_.pose();
            Vector3f vector3f = new Vector3f();

            for (ModelPart.Polygon modelpart$polygon : this.polygons) {
                Vector3f vector3f1 = p_171333_.transformNormal(modelpart$polygon.normal, vector3f);
                float f = vector3f1.x();
                float f1 = vector3f1.y();
                float f2 = vector3f1.z();

                for (ModelPart.Vertex modelpart$vertex : modelpart$polygon.vertices) {
                    float f3 = modelpart$vertex.pos.x() / 16.0F;
                    float f4 = modelpart$vertex.pos.y() / 16.0F;
                    float f5 = modelpart$vertex.pos.z() / 16.0F;
                    Vector3f vector3f2 = matrix4f.transformPosition(f3, f4, f5, vector3f);
                    p_171334_.addVertex(
                        vector3f2.x(),
                        vector3f2.y(),
                        vector3f2.z(),
                        p_344599_,
                        modelpart$vertex.u,
                        modelpart$vertex.v,
                        p_171336_,
                        p_171335_,
                        f,
                        f1,
                        f2
                    );
                }
            }
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static record Polygon(ModelPart.Vertex[] vertices, Vector3f normal) {
        public Polygon(
            ModelPart.Vertex[] p_104362_,
            float p_104363_,
            float p_104364_,
            float p_104365_,
            float p_104366_,
            float p_104367_,
            float p_104368_,
            boolean p_104369_,
            Direction p_104370_
        ) {
            this(p_104362_, p_104370_.step());
            float f = 0.0F / p_104367_;
            float f1 = 0.0F / p_104368_;
            p_104362_[0] = p_104362_[0].remap(p_104365_ / p_104367_ - f, p_104364_ / p_104368_ + f1);
            p_104362_[1] = p_104362_[1].remap(p_104363_ / p_104367_ + f, p_104364_ / p_104368_ + f1);
            p_104362_[2] = p_104362_[2].remap(p_104363_ / p_104367_ + f, p_104366_ / p_104368_ - f1);
            p_104362_[3] = p_104362_[3].remap(p_104365_ / p_104367_ - f, p_104366_ / p_104368_ - f1);
            if (p_104369_) {
                int i = p_104362_.length;

                for (int j = 0; j < i / 2; j++) {
                    ModelPart.Vertex modelpart$vertex = p_104362_[j];
                    p_104362_[j] = p_104362_[i - 1 - j];
                    p_104362_[i - 1 - j] = modelpart$vertex;
                }
            }

            if (p_104369_) {
                this.normal.mul(-1.0F, 1.0F, 1.0F);
            }
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static record Vertex(Vector3f pos, float u, float v) {
        public Vertex(float p_104375_, float p_104376_, float p_104377_, float p_104378_, float p_104379_) {
            this(new Vector3f(p_104375_, p_104376_, p_104377_), p_104378_, p_104379_);
        }

        public ModelPart.Vertex remap(float p_104385_, float p_104386_) {
            return new ModelPart.Vertex(this.pos, p_104385_, p_104386_);
        }
    }

    @FunctionalInterface
    @OnlyIn(Dist.CLIENT)
    public interface Visitor {
        void visit(PoseStack.Pose p_171342_, String p_171343_, int p_171344_, ModelPart.Cube p_171345_);
    }
}