Implementation of Plane integration tests

godot-core/src/builtin/plane.rs

@@ -214,10 +214,20 @@ impl Plane {
         self.normal.dot(point) > self.d
     }
 
-    /// Returns a normalized copy of the plane.
+    /// Returns a copy of the plane with its `normal` and `d` scaled to the unit length.
+    ///
+    /// A `normal` length of `0.0` would return a plane with its `normal` and `d` being `Vector3::ZERO`
+    /// and `0.0` respectively.
     #[inline]
     pub fn normalized(self) -> Self {
-        Plane::new(self.normal.normalized(), self.d)
+        let length: real = self.normal.length();
+        if length == 0.0 {
+            return Plane {
+                normal: Vector3::ZERO,
+                d: 0.0,
+            };
+        }
+        Plane::new(self.normal.normalized(), self.d / length)
     }
 
     /// Returns the orthogonal projection of `point` to the plane.

itest/rust/src/lib.rs

@@ -27,6 +27,7 @@ mod node_test;
 mod object_test;
 mod option_ffi_test;
 mod packed_array_test;
+mod plane_test;
 mod projection_test;
 mod quaternion_test;
 mod rect2i_test;

itest/rust/src/plane_test.rs

@@ -0,0 +1,239 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+use std::fmt::Debug;
+
+use crate::itest;
+use godot::builtin::inner::InnerPlane;
+use godot::builtin::{real, Plane, RealConv, ToVariant, Vector3};
+use godot::private::class_macros::assert_eq_approx;
+
+fn check_mapping_eq<T>(context: &str, outer: T, inner: T)
+where
+    T: PartialEq + Debug,
+{
+    assert_eq!(
+        outer, inner,
+        "{context}: outer != inner ({outer:?} != {inner:?})"
+    );
+}
+
+fn check_mapping_eq_approx_plane(context: &str, outer: Plane, inner: Plane) {
+    assert_eq_approx!(
+        outer,
+        inner,
+        |a: Plane, b: Plane| a.is_equal_approx(&b),
+        "{context}: outer != inner ({outer:?} != {inner:?})"
+    );
+}
+
+#[itest]
+fn plane_normalized() {
+    let a = Plane::new(Vector3::new(9.5, 3.3, 2.2).normalized(), -0.1);
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq_approx_plane("normalized", a.normalized(), inner_a.normalized());
+
+    let a = Plane {
+        normal: Vector3::new(4.2, 2.9, 1.5),
+        d: 2.4,
+    };
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq_approx_plane("normalized", a.normalized(), inner_a.normalized());
+}
+
+#[itest]
+fn plane_center() {
+    let a = Plane::new(Vector3::new(0.5, 2.0, 2.5).normalized(), 1.0);
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq("center", a.center(), inner_a.get_center());
+}
+
+#[itest]
+fn plane_is_finite() {
+    let a = Plane::new(Vector3::new(9.4, -1.2, 3.0).normalized(), 1.5);
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq("is_finite", a.is_finite(), inner_a.is_finite());
+
+    let a = Plane {
+        normal: Vector3::new(real::INFINITY, 2.9, 1.5),
+        d: 2.4,
+    };
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq("is_finite", a.is_finite(), inner_a.is_finite());
+}
+
+#[itest]
+fn plane_distance_to() {
+    let a = Plane::new(Vector3::BACK, 0.2);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::new(7.0, 9.0, 2.0);
+    check_mapping_eq(
+        "distance_to",
+        a.distance_to(b).as_f64(),
+        inner_a.distance_to(b),
+    );
+
+    let b = Vector3::new(-7.0, -9.0, -2.0);
+    check_mapping_eq(
+        "distance_to",
+        a.distance_to(b).as_f64(),
+        inner_a.distance_to(b),
+    );
+}
+
+#[itest]
+fn plane_is_point_over() {
+    let a = Plane::new(Vector3::BACK, 1.1);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::new(6.7, 8.4, 8.3);
+    check_mapping_eq(
+        "is_point_over",
+        a.is_point_over(b),
+        inner_a.is_point_over(b),
+    );
+
+    let b = Vector3::new(-0.5, -1.2, -7.1);
+    check_mapping_eq(
+        "is_point_over",
+        a.is_point_over(b),
+        inner_a.is_point_over(b),
+    );
+}
+
+#[itest]
+fn plane_project() {
+    let a = Plane::new(Vector3::new(8.6, -1.1, -10.1).normalized(), 3.3);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::new(7.2, -3.4, 9.9);
+    check_mapping_eq("project", a.project(b), inner_a.project(b));
+}
+
+#[itest]
+fn plane_intersect_segment() {
+    let a = Plane::new(Vector3::BACK, -0.2);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::new(7.2, 10.4, 9.9);
+    let c = Vector3::new(-9.4, -3.4, -3.1);
+    check_mapping_eq(
+        "intersect_segment",
+        a.intersect_segment(b, c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersects_segment(b, c),
+    );
+
+    let a = Plane::new(Vector3::BACK, 0.0);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::BACK;
+    let c = Vector3::new(0.0, 0.0, 0.5);
+    check_mapping_eq(
+        "intersect_segment",
+        a.intersect_segment(b, c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersects_segment(b, c),
+    );
+}
+
+#[itest]
+fn plane_intersect_ray() {
+    let a = Plane::new(Vector3::BACK, 0.0);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::new(0.1, 9.9, 5.7);
+    let c = Vector3::new(3.5, 3.2, 0.3);
+    check_mapping_eq(
+        "intersect_ray",
+        a.intersect_ray(b, c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersects_ray(b, c),
+    );
+
+    let b = Vector3::BACK;
+    let c = Vector3::new(1.0, 0.0, 1.0);
+    check_mapping_eq(
+        "intersect_ray",
+        a.intersect_ray(b, c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersects_ray(b, c),
+    );
+}
+
+#[itest]
+fn plane_contains_point() {
+    let a = Plane::new(Vector3::new(0.9, 6.6, 0.1).normalized(), 0.0001);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Vector3::ZERO;
+    let c: real = 0.01;
+    check_mapping_eq(
+        "contains_point",
+        a.contains_point(b, Some(c)),
+        inner_a.has_point(b, c.as_f64()),
+    );
+
+    let a = Plane::new(Vector3::new(0.9, 6.6, 0.1).normalized(), 0.1);
+    let inner_a = InnerPlane::from_outer(&a);
+    check_mapping_eq(
+        "contains_point",
+        a.contains_point(b, Some(c)),
+        inner_a.has_point(b, c.as_f64()),
+    );
+}
+
+#[itest]
+fn plane_is_equal_approx() {
+    let a = Plane::new(Vector3::new(1.5, 6.3, 2.2).normalized(), 5.2);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Plane::new(Vector3::new(1.5, 6.3, 2.2).normalized(), 5.2000001);
+    check_mapping_eq(
+        "is_equal_approx",
+        a.is_equal_approx(&b),
+        inner_a.is_equal_approx(b),
+    );
+
+    let a = Plane::new(Vector3::new(-1.9, 9.0, 2.7).normalized(), 5.4);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Plane::new(Vector3::new(0.0, 6.2, 2.5).normalized(), 0.4);
+    check_mapping_eq(
+        "is_equal_approx",
+        a.is_equal_approx(&b),
+        inner_a.is_equal_approx(b),
+    );
+}
+
+#[itest]
+fn plane_intersect_3() {
+    let a = Plane::new(Vector3::new(1.0, 2.0, 0.0).normalized(), 0.0);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Plane::new(Vector3::new(3.5, 6.0, -3.0).normalized(), 0.0);
+    let c = Plane::new(Vector3::new(-1.0, 6.0, 0.5).normalized(), 0.0);
+    check_mapping_eq(
+        "intersect_3",
+        a.intersect_3(&b, &c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersect_3(b, c),
+    );
+
+    let a = Plane::new(Vector3::new(1.5, 6.3, 2.2).normalized(), 5.2);
+    let inner_a = InnerPlane::from_outer(&a);
+    let b = Plane::new(Vector3::new(1.5, 6.3, 2.2).normalized(), 3.2);
+    let c = Plane::new(Vector3::new(1.5, 6.3, 2.2).normalized(), 9.5);
+    check_mapping_eq(
+        "intersect_3",
+        a.intersect_3(&b, &c)
+            .as_ref()
+            .map(ToVariant::to_variant)
+            .unwrap_or_default(),
+        inner_a.intersect_3(b, c),
+    );
+}