Merge pull request #2450 from dotCooCoo/feat/wiggle-paths-spatial-phase

Shapes: Wiggle Paths has Spatial Phase, which slides its wiggle along the path

crates/render/src/shapes.rs

@@ -324,6 +324,7 @@ fn collect(ctx: &EvalCtx, layer: &Layer, contents: &PropGroup, arena: &mut Vec<B
                     speed: ctx.f(layer, g, "speed", 2.0),
                     correlation: ctx.f(layer, g, "correlation", 50.0),
                     phase_deg: ctx.f(layer, g, "phase", 0.0),
+                    spatial_phase_deg: ctx.f(layer, g, "spatialPhase", 0.0),
                     seed: ctx.f(layer, g, "seed", 0.0),
                 };
                 let t = layer.layer_time(ctx.time).seconds();

crates/render/src/shapes/tests.rs

@@ -258,6 +258,24 @@ fn round_corners_clip_corner_pixels() {
     assert!((coverage(&img) - std::f32::consts::PI * 400.0).abs() < 15.0, "{}", coverage(&img));
 }
 
+/// Wiggle Paths' Spatial Phase changes the drawn shape; a whole turn draws it as at 0°.
+#[test]
+fn wiggle_paths_spatial_phase_renders() {
+    let render = |phase: f64| {
+        let (p, cid) = shape_comp(|ids| {
+            vec![
+                build::shape_ellipse(ids, [60.0, 60.0], [0.0, 0.0]),
+                op(ids, "wiggle", &[("size", Value::Scalar(8.0)), ("correlation", Value::Scalar(0.0)), ("spatialPhase", Value::Scalar(phase))]),
+                build::shape_fill(ids, RED),
+            ]
+        });
+        render_frame(&p, cid, Tick::from_seconds_f64(0.5), 1.0).data
+    };
+    let zero = render(0.0);
+    assert!(render(90.0) != zero, "Spatial Phase 90° draws the shape of 0°");
+    assert!(render(360.0) == zero, "Spatial Phase 360° draws another shape than 0°");
+}
+
 #[test]
 fn wiggle_paths_vary_over_time_deterministically() {
     let (p, cid) = shape_comp(|ids| {