/* Copyright (C) 2024 Sebastián Santisi <ssantisi@fi.uba.ar>, CSC-CONICET */
import * as THREE from 'three';

function checkBoard(width, height) {
    var geometry = new THREE.PlaneGeometry(width, height, width, height);
    geometry = geometry.toNonIndexed();
    const colors = new three.BufferAttribute(new Float32Array(geometry.attributes.position.array.length), 3);
    for(var i = 0; i < colors.count; i++) {
        var col = Math.trunc(i / 6) % width;
        var row = Math.trunc(i / 6 / width);
        if((col + row % 2) % 2)
            colors.setXYZ(i, 0x44 / 0xff, 0xaa / 0xff, 0);
        else
            colors.setXYZ(i, 0x55 / 0xff, 0xd4 / 0xff, 0);
    }
    geometry.setAttribute('color', colors);
    const material = new THREE.MeshBasicMaterial({vertexColors: THREE.VertexColors});
    var mesh = new THREE.Mesh(geometry, material);

    mesh.position.x = width / 2;
    mesh.position.y = height / 2;
    return mesh;
}

export { checkBoard };