mocap/floor.js at master · bramcod2/mocap · GitHub

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// John Edwards
// Lecture 9.1-9.6
// Fall 2015
var Floor = function () {
    var pointsArray = [];
    var colorsArray = [];
    var y = 0.0;
    var lo = -10.0;
    var hi = 10.0;
    var inc = 0.1;
    for (var x = lo; x <= hi; x += inc) {
        pointsArray.push(vec4(x, y, hi));
        pointsArray.push(vec4(x, y, lo));
        colorsArray.push(vec4(8.0, 8.0, 8.0, 1.0));
        colorsArray.push(vec4(8.0, 8.0, 8.0, 1.0));
    }
    for (var z = lo; z <= hi; z += inc) {
        pointsArray.push(vec4(lo, y, z));
        pointsArray.push(vec4(hi, y, z));
        colorsArray.push(vec4(8.0, 8.0, 8.0, 1.0));
        colorsArray.push(vec4(8.0, 8.0, 8.0, 1.0));
    }

    this.vertexBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, this.vertexBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, flatten(pointsArray), gl.STATIC_DRAW);

    this.colorBuffer = gl.createBuffer();
    gl.bindBuffer(gl.ARRAY_BUFFER, this.colorBuffer);
    gl.bufferData(gl.ARRAY_BUFFER, flatten(colorsArray), gl.STATIC_DRAW);

    this.numPoints = pointsArray.length;

}