(start, end, numDirections, grid, opt)
| 315 | // returns a direction index from start point to end point |
| 316 | // corrects for grid deformation between start and end |
| 317 | function getDirectionAngle(start, end, numDirections, grid, opt) { |
| 318 | |
| 319 | var quadrant = 360 / numDirections; |
| 320 | var angleTheta = start.theta(fixAngleEnd(start, end, grid, opt)); |
| 321 | var normalizedAngle = g.normalizeAngle(angleTheta + (quadrant / 2)); |
| 322 | return quadrant * Math.floor(normalizedAngle / quadrant); |
| 323 | } |
| 324 | |
| 325 | // helper function for getDirectionAngle() |
| 326 | // corrects for grid deformation |
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