ZJinJaDecoration/src/main/java/com/zjinja/mcmod/decor/utils/model_dir_util/ModelDirectionUtil.java

package com.zjinja.mcmod.decor.utils.model_dir_util;

import com.zjinja.mcmod.decor.ZJinJaDecoration;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.item.ItemStack;
import net.minecraft.util.MathHelper;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;
import org.lwjgl.opengl.GL11;

public class ModelDirectionUtil {
    public RotationVector RotationMetaTable[];
    public BoundingBoxVector RelBoundingBox;
    public BoundingBoxVector AbsBoundingBoxMetaTable[];

    public ModelDirectionUtil(){
        RotationMetaTable = new RotationVector[16];
        for(int i = 0; i < 16; i++){
            RotationMetaTable[i] = new RotationVector();
        }
        RelBoundingBox = new BoundingBoxVector();
        AbsBoundingBoxMetaTable = new BoundingBoxVector[16];
        for(int i = 0; i < 16; i++){
            AbsBoundingBoxMetaTable[i] = new BoundingBoxVector();
        }
    }

    public void DefineMetaRotation(int Meta, RotationVector rv){
        int index = Meta % 16;
        RotationMetaTable[index] = rv;
    }

    public void DefineRelBoundingBox(BoundingBoxVector rbbv){
        RelBoundingBox = rbbv;
        for(int i = 0; i < 16; i++){
            AbsBoundingBoxMetaTable[i] = CalcMetaBoundingBoxTableItem(i);
        }
    }

    public RotationVector GetRotationByMeta(int meta){
        int rmeta = meta % 16;
        RotationVector rrv = RotationMetaTable[rmeta];
        return rrv;
    }

    private BoundingBoxVector CalcMetaBoundingBoxTableItem(int meta){
        RotationVector rrv = GetRotationByMeta(meta);
        int rx,ry,rz;
        float tx1,tx2,ty1,ty2,tz1,tz2;
        float ux1,ux2,uy1,uy2,uz1,uz2;
        rx = rrv.RotateX % 4;
        ry = rrv.RotateY % 4;
        rz = rrv.RotateZ % 4;

        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("Rotation @ Meta=%d: (%d,%d,%d)",
                            meta, rx, ry, rz
                    )
            );
        }

        // Coordinate Transformation Before Rotation
        tx1 = RelBoundingBox.x1 - 0.5F;
        tx2 = RelBoundingBox.x2 - 0.5F;
        ty1 = RelBoundingBox.y1 - 0.5F;
        ty2 = RelBoundingBox.y2 - 0.5F;
        tz1 = RelBoundingBox.z1 - 0.5F;
        tz2 = RelBoundingBox.z2 - 0.5F;

        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("Coordinate Transformation: Meta=%d: Pos1=(%f,%f,%f), Pos2=(%f,%f,%f)",
                            meta, tx1, ty1, tz1, tx2, ty2, tz2
                    )
            );
        }

        //Rotating X Axis
        switch (rx){
            default:
                ux1 = tx1;
                ux2 = tx2;
                uy1 = ty1;
                uy2 = ty2;
                uz1 = tz1;
                uz2 = tz2;
                break;
            case 1:
                ux1 = tx1;
                ux2 = tx2;
                uy1 = -tz1;
                uy2 = -tz2;
                uz1 = ty1;
                uz2 = ty2;
                break;
            case 2:
                ux1 = tx1;
                ux2 = tx2;
                uy1 = -ty1;
                uy2 = -ty2;
                uz1 = -tz1;
                uz2 = -tz2;
                break;
            case 3:
                ux1 = tx1;
                ux2 = tx2;
                uy1 = tz1;
                uy2 = tz2;
                uz1 = -ty1;
                uz2 = -ty2;
                break;
        }

        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("After X Axis Trans: Meta=%d: Pos1=(%f,%f,%f), Pos2=(%f,%f,%f)",
                            meta, ux1, uy1, uz1, ux2, uy2, uz2
                    )
            );
        }
        //Rotating Y Axis
        switch (ry){
            default:
                tx1 = ux1;
                tx2 = ux2;
                ty1 = uy1;
                ty2 = uy2;
                tz1 = uz1;
                tz2 = uz2;
                break;
            case 1:
                tx1 = -uz1;
                tx2 = -uz2;
                ty1 = uy1;
                ty2 = uy2;
                tz1 = ux1;
                tz2 = ux2;
                break;
            case 2:
                tx1 = -ux1;
                tx2 = -ux2;
                ty1 = uy1;
                ty2 = uy2;
                tz1 = -uz1;
                tz2 = -uz2;
                break;
            case 3:
                tx1 = uz1;
                tx2 = uz2;
                ty1 = uy1;
                ty2 = uy2;
                tz1 = -ux1;
                tz2 = -ux2;
                break;
        }
        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("After Y Axis Trans: Meta=%d: Pos1=(%f,%f,%f), Pos2=(%f,%f,%f)",
                            meta, tx1, ty1, tz1, tx2, ty2, tz2
                    )
            );
        }
        //Rotating Z Axis
        switch (rz){
            default:
                ux1 = tx1;
                ux2 = tx2;
                uy1 = ty1;
                uy2 = ty2;
                uz1 = tz1;
                uz2 = tz2;
                break;
            case 1:
                ux1 = -ty1;
                ux2 = -ty2;
                uy1 = tx1;
                uy2 = tx2;
                uz1 = tz1;
                uz2 = tz2;
                break;
            case 2:
                ux1 = -tx1;
                ux2 = -tx2;
                uy1 = -ty1;
                uy2 = -ty2;
                uz1 = tz1;
                uz2 = tz2;
                break;
            case 3:
                ux1 = ty1;
                ux2 = ty2;
                uy1 = -tx1;
                uy2 = -tx2;
                uz1 = tz1;
                uz2 = tz2;
                break;
        }
        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("After Z Axis Trans: Meta=%d: Pos1=(%f,%f,%f), Pos2=(%f,%f,%f)",
                            meta, ux1, uy1, uz1, ux2, uy2, uz2
                    )
            );
        }
        float minx,miny,minz,maxx,maxy,maxz;
        minx = Math.min(ux1 + 0.5F, ux2 + 0.5F);
        maxx = Math.max(ux1 + 0.5F, ux2 + 0.5F);
        miny = Math.min(uy1 + 0.5F, uy2 + 0.5F);
        maxy = Math.max(uy1 + 0.5F, uy2 + 0.5F);
        minz = Math.min(uz1 + 0.5F, uz2 + 0.5F);
        maxz = Math.max(uz1 + 0.5F, uz2 + 0.5F);
        // Coordinate Transformation After Rotation
        BoundingBoxVector abbv = new BoundingBoxVector(minx, miny, minz, maxx, maxy, maxz);
        if(ZJinJaDecoration.DebugMode){
            ZJinJaDecoration.logger.warn(
                    String.format("BoundingBox @ Meta=%d: Pos1=(%f,%f,%f), Pos2=(%f,%f,%f)",
                            meta, minx, miny, minz, maxx, maxy, maxz)
            );
        }
        return abbv;
    }

    public BoundingBoxVector GetAbsBoundingBoxByMeta(int meta){
        int rmeta = meta % 16;
        return AbsBoundingBoxMetaTable[rmeta];
    }

    public void GLTransformByMeta(int meta){
        RotationVector rv = GetRotationByMeta(meta);
        float ax,ay,az;
        ax = rv.RotateX % 4 * 90.0F;
        ay = rv.RotateY % 4 * 90.0F;
        az = rv.RotateZ % 4 * 90.0F;
        GL11.glPushMatrix();
        GL11.glRotatef(ax, -1.0F, 0.0F, 0.0F);
        GL11.glPushMatrix();
        GL11.glRotatef(ay, 0.0F, -1.0F, 0.0F);
        GL11.glPushMatrix();
        GL11.glRotatef(az, 0.0F, 0.0F, -1.0F);
    }

    public OffsetVector CalcOffsetFromRelOffset(int meta, float OffsetX, float OffsetY, float OffsetZ){
        RotationVector rrv = GetRotationByMeta(meta);
        int rx,ry,rz;
        float tx,ty,tz, ux, uy, uz;
        rx = rrv.RotateX % 4;
        ry = rrv.RotateY % 4;
        rz = rrv.RotateZ % 4;

        //Rotating X Axis
        switch (rx){
            default:
                ux = OffsetX;
                uy = OffsetY;
                uz = OffsetZ;
                break;
            case 1:
                ux = OffsetX;
                uy = -OffsetZ;
                uz = OffsetY;
                break;
            case 2:
                ux = OffsetX;
                uy = -OffsetY;
                uz = -OffsetZ;
                break;
            case 3:
                ux = OffsetX;
                uy = OffsetZ;
                uz = -OffsetY;
                break;
        }

        //Rotating Y Axis
        switch (ry){
            default:
                tx = ux;
                ty = uy;
                tz = uz;
                break;
            case 1:
                tx = -uz;
                ty = uy;
                tz = ux;
                break;
            case 2:
                tx = -ux;
                ty = uy;
                tz = -uz;
                break;
            case 3:
                tx = uz;
                ty = uy;
                tz = -ux;
                break;
        }
        //Rotating Z Axis
        switch (rz){
            default:
                ux = tx;
                uy = ty;
                uz = tz;
                break;
            case 1:
                ux = -ty;
                uy = tx;
                uz = tz;
                break;
            case 2:
                ux = -tx;
                uy = -ty;
                uz = tz;
                break;
            case 3:
                ux = ty;
                uy = -tx;
                uz = tz;
                break;
        }
        return new OffsetVector(ux, uy, uz);
    }

    public void FastDefine_4Dir(){
        DefineMetaRotation(0, new RotationVector(0,0,0));
        DefineMetaRotation(1, new RotationVector(0,1,0));
        DefineMetaRotation(2, new RotationVector(0,2,0));
        DefineMetaRotation(3, new RotationVector(0,3,0));
        DefineMetaRotation(4, new RotationVector(0,0,0));
        DefineMetaRotation(5, new RotationVector(0,1,0));
        DefineMetaRotation(6, new RotationVector(0,2,0));
        DefineMetaRotation(7, new RotationVector(0,3,0));
        DefineMetaRotation(8, new RotationVector(0,0,0));
        DefineMetaRotation(9, new RotationVector(0,1,0));
        DefineMetaRotation(10, new RotationVector(0,2,0));
        DefineMetaRotation(11, new RotationVector(0,3,0));
        DefineMetaRotation(12, new RotationVector(0,0,0));
        DefineMetaRotation(13, new RotationVector(0,1,0));
        DefineMetaRotation(14, new RotationVector(0,2,0));
        DefineMetaRotation(15, new RotationVector(0,3,0));
    }

    public void FastPlaceConv_4Dir(World world, int x, int y, int z, EntityLivingBase player, ItemStack itemStack){
        int side = world.getBlockMetadata(x, y, z);
        int l = MathHelper.floor_double((double)(player.rotationYaw * 4.0F / 360.0F) + 0.5D) & 3;
        int ro = PlaceSideEnum.TransToRotation(PlaceSideEnum.valueOf(side));
        if(ro == -1){
            ro = PlaceSideEnum.TransToRotation(PlaceSideEnum.fromYaw(l));
        }
        world.setBlockMetadataWithNotify(x, y, z, ro, 2);
    }

}