diff options
| -rw-r--r-- | core/bind/core_bind.cpp | 11 | ||||
| -rw-r--r-- | core/bind/core_bind.h | 1 | ||||
| -rw-r--r-- | core/math/geometry.h | 15 | ||||
| -rw-r--r-- | doc/classes/Geometry.xml | 15 |
4 files changed, 42 insertions, 0 deletions
diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp index 32b94b9b02..b5cf2e086c 100644 --- a/core/bind/core_bind.cpp +++ b/core/bind/core_bind.cpp @@ -1234,6 +1234,16 @@ Variant _Geometry::segment_intersects_segment_2d(const Vector2 &p_from_a, const }; }; +Variant _Geometry::line_intersects_line_2d(const Vector2 &p_from_a, const Vector2 &p_dir_a, const Vector2 &p_from_b, const Vector2 &p_dir_b) { + + Vector2 result; + if (Geometry::line_intersects_line_2d(p_from_a, p_dir_a, p_from_b, p_dir_b, result)) { + return result; + } else { + return Variant(); + } +} + PoolVector<Vector2> _Geometry::get_closest_points_between_segments_2d(const Vector2 &p1, const Vector2 &q1, const Vector2 &p2, const Vector2 &q2) { Vector2 r1, r2; @@ -1389,6 +1399,7 @@ void _Geometry::_bind_methods() { ClassDB::bind_method(D_METHOD("build_capsule_planes", "radius", "height", "sides", "lats", "axis"), &_Geometry::build_capsule_planes, DEFVAL(Vector3::AXIS_Z)); ClassDB::bind_method(D_METHOD("segment_intersects_circle", "segment_from", "segment_to", "circle_position", "circle_radius"), &_Geometry::segment_intersects_circle); ClassDB::bind_method(D_METHOD("segment_intersects_segment_2d", "from_a", "to_a", "from_b", "to_b"), &_Geometry::segment_intersects_segment_2d); + ClassDB::bind_method(D_METHOD("line_intersects_line_2d", "from_a", "dir_a", "from_b", "dir_b"), &_Geometry::line_intersects_line_2d); ClassDB::bind_method(D_METHOD("get_closest_points_between_segments_2d", "p1", "q1", "p2", "q2"), &_Geometry::get_closest_points_between_segments_2d); ClassDB::bind_method(D_METHOD("get_closest_points_between_segments", "p1", "p2", "q1", "q2"), &_Geometry::get_closest_points_between_segments); diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h index 2353b6d09f..e90a28339f 100644 --- a/core/bind/core_bind.h +++ b/core/bind/core_bind.h @@ -347,6 +347,7 @@ public: PoolVector<Plane> build_cylinder_planes(float p_radius, float p_height, int p_sides, Vector3::Axis p_axis = Vector3::AXIS_Z); PoolVector<Plane> build_capsule_planes(float p_radius, float p_height, int p_sides, int p_lats, Vector3::Axis p_axis = Vector3::AXIS_Z); Variant segment_intersects_segment_2d(const Vector2 &p_from_a, const Vector2 &p_to_a, const Vector2 &p_from_b, const Vector2 &p_to_b); + Variant line_intersects_line_2d(const Vector2 &p_from_a, const Vector2 &p_dir_a, const Vector2 &p_from_b, const Vector2 &p_dir_b); PoolVector<Vector2> get_closest_points_between_segments_2d(const Vector2 &p1, const Vector2 &q1, const Vector2 &p2, const Vector2 &q2); PoolVector<Vector3> get_closest_points_between_segments(const Vector3 &p1, const Vector3 &p2, const Vector3 &q1, const Vector3 &q2); Vector2 get_closest_point_to_segment_2d(const Vector2 &p_point, const Vector2 &p_a, const Vector2 &p_b); diff --git a/core/math/geometry.h b/core/math/geometry.h index ca4363e129..1c4601724d 100644 --- a/core/math/geometry.h +++ b/core/math/geometry.h @@ -530,6 +530,21 @@ public: return p_segment[0] + n * d; // inside } + static bool line_intersects_line_2d(const Vector2 &p_from_a, const Vector2 &p_dir_a, const Vector2 &p_from_b, const Vector2 &p_dir_b, Vector2 &r_result) { + + // see http://paulbourke.net/geometry/pointlineplane/ + + const real_t denom = p_dir_b.y * p_dir_a.x - p_dir_b.x * p_dir_a.y; + if (Math::abs(denom) < CMP_EPSILON) { // parallel? + return false; + } + + const Vector2 v = p_from_a - p_from_b; + const real_t t = (p_dir_b.x * v.y - p_dir_b.y * v.x) / denom; + r_result = p_from_a + t * p_dir_a; + return true; + } + static bool segment_intersects_segment_2d(const Vector2 &p_from_a, const Vector2 &p_to_a, const Vector2 &p_from_b, const Vector2 &p_to_b, Vector2 *r_result) { Vector2 B = p_to_a - p_from_a; diff --git a/doc/classes/Geometry.xml b/doc/classes/Geometry.xml index a40094d840..10ba787932 100644 --- a/doc/classes/Geometry.xml +++ b/doc/classes/Geometry.xml @@ -259,6 +259,21 @@ Checks if the two segments ([code]from_a[/code], [code]to_a[/code]) and ([code]from_b[/code], [code]to_b[/code]) intersect. If yes, return the point of intersection as [Vector2]. If no intersection takes place, returns an empty [Variant]. </description> </method> + <method name="line_intersects_line_2d"> + <return type="Variant"> + </return> + <argument index="0" name="from_a" type="Vector2"> + </argument> + <argument index="1" name="dir_a" type="Vector2"> + </argument> + <argument index="2" name="from_b" type="Vector2"> + </argument> + <argument index="3" name="dir_b" type="Vector2"> + </argument> + <description> + Checks if the two lines ([code]from_a[/code], [code]dir_a[/code]) and ([code]from_b[/code], [code]dir_b[/code]) intersect. If yes, return the point of intersection as [Vector2]. If no intersection takes place, returns an empty [Variant]. Note that the lines are specified using direction vectors, not end points. + </description> + </method> <method name="segment_intersects_sphere"> <return type="PoolVector3Array"> </return> |