code: function rayshoot(d, m, A, b, z, r) {
  
  			var i = 0;
  			var j = m;
  			var w = undefined;
  
  			while (true) {
  
  				if (i >= j) return j;
  
  				var h = A[i];
  
  				w = (b[i] - vdot(d, h, z)) / vdot(d, h, r);
  
  				if (w >= 0) break;
  
  				++i;
  			}
  
  			var k = i;
  
  			while (true) {
  
  				++i;
  
  				if (i >= j) return k;
  
  				var h = A[i];
  
  				var l = (b[i] - vdot(d, h, z)) / vdot(d, h, r);
  
  				if (l < 0 || l >= w) continue;
  
  				k = i;
  				w = l;
  			}
  		}
docs: /* js/src/dn /* js/src/dn/rayshoot.js 
  Computes the hyperplane in `Ax = b` closest to `z` with respect to the
  direction `r`. Complexity is O(nd).
  
  @param {dimension} d space dimension
  @param {count} m the number of hyperplanes
  @param {matrix} A an m x d matrix
  @param {vector} b a vector of length d
  @param {vertex} z the point to shoot from
  @param {direction} r the direction to shoot in