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Bezier-rs: Added curve outline functions (#789)

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* Implement offset and reverse

Co-authored-by: Rob Nadal <robnadal44@gmail.com>

* Initial work on graduated outline

Co-authored-by: Rob Nadal <robnadal44@gmail.com>

* Handle linear case for graduated scale

* Added skewed outline, fixed graduated scale hourglass bug

* Removed test code

* Update comments

* Fix linting issue

* Improve comments

* Comment fixes

Co-authored-by: Hannah Li <hannahli2010@gmail.com>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Rob Nadal
2022-11-06 21:25:00 -08:00
committed by Keavon Chambers
co-authored by Hannah Li Keavon Chambers
parent a695584d36
commit 56060b8e5f
6 changed files with 321 additions and 5 deletions
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libraries/bezier-rs/src/utils.rs
+11
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@@ -226,6 +226,17 @@ pub fn dvec2_approximately_in_range(point: DVec2, min: DVec2, max: DVec2, max_ab
(point.cmpge(min) & point.cmple(max)) | dvec2_compare(point, min, max_abs_diff) | dvec2_compare(point, max, max_abs_diff)
}
/// Calculate a new position for a point given its original position, a unit vector in the desired direction, and a distance to move it by.
pub fn scale_point_from_direction_vector(point: DVec2, direction_unit_vector: DVec2, should_flip_direction: bool, distance: f64) -> DVec2 {
let should_reverse_factor = if should_flip_direction { -1. } else { 1. };
point + distance * direction_unit_vector * should_reverse_factor
}
/// Scale a point by a given distance with respect to the provided origin.
pub fn scale_point_from_origin(point: DVec2, origin: DVec2, should_flip_direction: bool, distance: f64) -> DVec2 {
scale_point_from_direction_vector(point, (origin - point).normalize(), should_flip_direction, distance)
}
#[cfg(test)]
mod tests {
use super::*;