// 
// Decompiled by Procyon v0.6.0
// 

package com.hypixel.hytale.math.iterator;

import javax.annotation.Nonnull;
import java.util.NoSuchElementException;
import com.hypixel.hytale.math.vector.Vector3i;
import java.util.Iterator;

public class LineIterator implements Iterator<Vector3i>
{
    private final int x_inc;
    private final int y_inc;
    private final int z_inc;
    private final int l;
    private final int m;
    private final int n;
    private final int dx2;
    private final int dy2;
    private final int dz2;
    private int i;
    private int err1;
    private int err2;
    private int pointX;
    private int pointY;
    private int pointZ;
    
    public LineIterator(final int x1, final int y1, final int z1, final int x2, final int y2, final int z2) {
        this.pointX = x1;
        this.pointY = y1;
        this.pointZ = z1;
        final int dx = x2 - x1;
        final int dy = y2 - y1;
        final int dz = z2 - z1;
        this.x_inc = ((dx < 0) ? -1 : 1);
        this.y_inc = ((dy < 0) ? -1 : 1);
        this.z_inc = ((dz < 0) ? -1 : 1);
        this.l = Math.abs(dx);
        this.m = Math.abs(dy);
        this.n = Math.abs(dz);
        this.dx2 = this.l << 1;
        this.dy2 = this.m << 1;
        this.dz2 = this.n << 1;
        if (this.l >= this.m && this.l >= this.n) {
            this.err1 = this.dy2 - this.l;
            this.err2 = this.dz2 - this.l;
        }
        else if (this.m >= this.l && this.m >= this.n) {
            this.err1 = this.dx2 - this.m;
            this.err2 = this.dz2 - this.m;
        }
        else {
            this.err1 = this.dx2 - this.n;
            this.err2 = this.dy2 - this.n;
        }
    }
    
    @Override
    public boolean hasNext() {
        if (this.l >= this.m && this.l >= this.n) {
            return this.i <= this.l;
        }
        if (this.m >= this.l && this.m >= this.n) {
            return this.i <= this.m;
        }
        return this.i <= this.n;
    }
    
    @Nonnull
    @Override
    public Vector3i next() {
        if (this.l >= this.m && this.l >= this.n) {
            if (this.i == this.l) {
                ++this.i;
                return new Vector3i(this.pointX, this.pointY, this.pointZ);
            }
            if (this.i > this.l) {
                throw new NoSuchElementException();
            }
            final Vector3i vector3i = new Vector3i(this.pointX, this.pointY, this.pointZ);
            this.pointX += this.x_inc;
            if (this.err1 > 0) {
                this.pointY += this.y_inc;
                this.err1 -= this.dx2;
            }
            this.err1 += this.dy2;
            if (this.err2 > 0) {
                this.pointZ += this.z_inc;
                this.err2 -= this.dx2;
            }
            this.err2 += this.dz2;
            ++this.i;
            return vector3i;
        }
        else if (this.m >= this.l && this.m >= this.n) {
            if (this.i == this.m) {
                ++this.i;
                return new Vector3i(this.pointX, this.pointY, this.pointZ);
            }
            if (this.i > this.m) {
                throw new NoSuchElementException();
            }
            final Vector3i vector3i = new Vector3i(this.pointX, this.pointY, this.pointZ);
            if (this.err1 > 0) {
                this.pointX += this.x_inc;
                this.err1 -= this.dy2;
            }
            this.err1 += this.dx2;
            this.pointY += this.y_inc;
            if (this.err2 > 0) {
                this.pointZ += this.z_inc;
                this.err2 -= this.dy2;
            }
            this.err2 += this.dz2;
            ++this.i;
            return vector3i;
        }
        else {
            if (this.i == this.n) {
                ++this.i;
                return new Vector3i(this.pointX, this.pointY, this.pointZ);
            }
            if (this.i > this.n) {
                throw new NoSuchElementException();
            }
            final Vector3i vector3i = new Vector3i(this.pointX, this.pointY, this.pointZ);
            if (this.err1 > 0) {
                this.pointX += this.x_inc;
                this.err1 -= this.dz2;
            }
            this.err1 += this.dx2;
            if (this.err2 > 0) {
                this.pointY += this.y_inc;
                this.err2 -= this.dz2;
            }
            this.err2 += this.dy2;
            this.pointZ += this.z_inc;
            ++this.i;
            return vector3i;
        }
    }
}