#5339 Add tangent snapping to straight segment tool (#5995)

* first draft of making segment snap to previous arc's last tangent

* ability to force/disable line snap, threshold in screen space

* mouseEvent refactor tsc errors fixed

* cleanups, extract getTanPreviousPoint function

* add snap line support when previous segment is ARC

* small cleanups

* remove unused planeNodePath param from onDragSegment

* renaming

* Enable snapping when placing the segment point in onClick

* refactor getSnappedDragPoint to include axis intersection

* handle snapping to both axis and tangent direction

* snap refinements

* small cleanups

* lint

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* A snapshot a day keeps the bugs away! 📷🐛

* generate tag for previous arc when snapping current straight segment

* using previous arc's tag in snapped angledLine

* angledLine uses object instead of array now

* use more general snap object instead

* snap tangent line visualized when snapping occurs

* remove unused scale param from createLine

* prettier

* fix bug where segment body is not drawn

* fix generated kcl error introduced in merge from main - modifiedAst needs to be passed to addNewSketchLn

* add support for snapping to negative tangent direction

* fix findTangentDirection for THREE_POINT_ARC_SEGMENT

* fix tsc error by introducing overrideExpr

* fix missing ccw for 3 point arc, fix tan_previous_point calculation for 3 point arcs

* resolve clippy until confirmation for circle radius

* fix runtime error when drawing a 3 point arc

* add unit tests to closestPointoOnRay

* unrelated react warning fixed

* add playwright test for tangent snapping

* better fix for tan_previous_point

* fix lint

* add simulation test for tangent_to_3_point_arc

* Fix simulation test output

* Add missing simulation test output files

* fix tangent snapping bug: use current group instead of last group in activeSegments

* make testcombos.test happy

* cleanup merge

* fix merge mistake, tsc error

* update tangent_to_3_point_arc simulation test

* fix angledLine related breaking tests

* minimum distance added before snapping to tangent

* circle is always ccw regardless of the order of points for tangential info calculation

* fix snapping when different unit is used other than mm

* update test: Straight line snapping to previous tangent

* update rust snapshot test

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Frank Noirot <frank@zoo.dev>
Co-authored-by: Jonathan Tran <jonnytran@gmail.com>

rust/kcl-lib/src/simulation_tests.rs

@@ -2482,6 +2482,7 @@ mod intersect_cubes {
         super::execute(TEST_NAME, true).await
     }
 }
+
 mod pattern_into_union {
     const TEST_NAME: &str = "pattern_into_union";
 
@@ -2524,3 +2525,24 @@ mod subtract_doesnt_need_brackets {
         super::execute(TEST_NAME, true).await
     }
 }
+
+mod tangent_to_3_point_arc {
+    const TEST_NAME: &str = "tangent_to_3_point_arc";
+    /// Test parsing KCL.
+    #[test]
+    fn parse() {
+        super::parse(TEST_NAME)
+    }
+
+    /// Test that parsing and unparsing KCL produces the original KCL input.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn unparse() {
+        super::unparse(TEST_NAME).await
+    }
+
+    /// Test that KCL is executed correctly.
+    #[tokio::test(flavor = "multi_thread")]
+    async fn kcl_test_execute() {
+        super::execute(TEST_NAME, true).await
+    }
+}