Better poi index computation #109
Draft
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
gberaudo
reviewed
Aug 28, 2023
| flatCoordinates[offset], | ||
| flatCoordinates[offset + 1] | ||
| ); | ||
| if (squaredDistance < minSquaredDistance) { |
Contributor
There was a problem hiding this comment.
This condition is always true.
Comment on lines
+142
to
+143
| ((Math.sqrt(squaredDistance) - Math.sqrt(minSquaredDistance)) / | ||
| maxDelta) | |
Contributor
There was a problem hiding this comment.
Is this an integer?
Also, instead of max we could do xxxx | 1 and that would also avoid te infinite loop.
Comment on lines
+149
to
+169
| let totalSquaredDistance = 0; | ||
| for (i = offset + stride; i < minIndex; ++i) { | ||
| totalSquaredDistance += squaredDx( | ||
| flatCoordinates[i - stride], | ||
| flatCoordinates[i - stride + 1], | ||
| flatCoordinates[i], | ||
| flatCoordinates[i + 1] | ||
| ) | ||
| } | ||
| totalSquaredDistance += squaredDx( | ||
| flatCoordinates[minIndex], | ||
| flatCoordinates[minIndex + 1], | ||
| closestPoint[0], | ||
| closestPoint[1] | ||
| ); | ||
|
|
||
| return { | ||
| totalSquaredDistance: totalSquaredDistance, | ||
| squaredDistance: minSquaredDistance, | ||
| closestPoint: closestPoint, | ||
| } |
Contributor
There was a problem hiding this comment.
I think this part can be computed by the algorithm automatically:
- from the initial coordinates;
- add 1 dimension for the distanceFromTheStartToThisPoint;
- then the assignClosest function will automatically compute the distance from the start of the track to the projected point.
Comment on lines
+121
to
+126
| minSquaredDistance = squaredDistance; | ||
| minIndex = index; | ||
| for (i = 0; i < stride; ++i) { | ||
| closestPoint[i] = tmpPoint[i]; | ||
| } | ||
| closestPoint.length = stride; |
Contributor
There was a problem hiding this comment.
I think we could avoid these copies by defining 2 points and swapping between them appropriately:
let closestPoint = [];
let assignedPoint = [];
...
assignedPoint = assignClosest(..., assignedClosest);
if (squaredDistance < minSquaredDistance) {
minSquaredDistance = squaredDistance;
minIndex = index;
[closestPoint, assignedPoint] = [assignedPoint, closestPoint]; // swap variables
...
}
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.