42 lines
792 B
JavaScript
42 lines
792 B
JavaScript
/* VECTORS */
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var vector = this
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vector.random = function () {
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var vec = [Math.random() - 0.5, Math.random() - 0.5];
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return vector.norm(vec);
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};
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vector.direction = function (from, to) {
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return vector.norm(to.sub(from));
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};
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vector.equal = function (v1, v2, tol) {
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if (!tol) return v1.equal(v2);
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var eql = true;
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var c = v1.sub(v2);
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c.forEach(function (x) {
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if (!eql) return;
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if (Math.abs(x) > tol) eql = false;
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});
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return eql;
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};
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vector.reflect = function (vec, plane) {
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var p = vector.norm(plane);
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return vec.sub(p.scale(2 * vector.dot(vec, p)));
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};
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vector.reflect_point = function (vec, point) {
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return point.add(vec.sub(point).scale(-1));
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};
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vector.v2one = [1,1];
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vector.v3one = [1,1,1];
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vector.v2zero = [0,0];
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vector.v3zero = [0,0,0];
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return vector
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