Merge pull request #30226 from lawnjelly/interpolate

Add access to interpolation fraction for fixed timestep interpolation

4 files changed, 9 insertions, 0 deletions

diff --git a/core/bind/core_bind.cpp b/core/bind/core_bind.cpp
index 34bbdb2c75..b41b84ab1e 100644
--- a/core/bind/core_bind.cpp
+++ b/core/bind/core_bind.cpp
@@ -2941,6 +2941,10 @@ float _Engine::get_physics_jitter_fix() const {
 	return Engine::get_singleton()->get_physics_jitter_fix();
 }
 
+float _Engine::get_physics_interpolation_fraction() const {
+	return Engine::get_singleton()->get_physics_interpolation_fraction();
+}
+
 void _Engine::set_target_fps(int p_fps) {
 	Engine::get_singleton()->set_target_fps(p_fps);
 }
@@ -3029,6 +3033,7 @@ void _Engine::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_iterations_per_second"), &_Engine::get_iterations_per_second);
 	ClassDB::bind_method(D_METHOD("set_physics_jitter_fix", "physics_jitter_fix"), &_Engine::set_physics_jitter_fix);
 	ClassDB::bind_method(D_METHOD("get_physics_jitter_fix"), &_Engine::get_physics_jitter_fix);
+	ClassDB::bind_method(D_METHOD("get_physics_interpolation_fraction"), &_Engine::get_physics_interpolation_fraction);
 	ClassDB::bind_method(D_METHOD("set_target_fps", "target_fps"), &_Engine::set_target_fps);
 	ClassDB::bind_method(D_METHOD("get_target_fps"), &_Engine::get_target_fps);
 
diff --git a/core/bind/core_bind.h b/core/bind/core_bind.h
index 3be5a08752..f0f86e003f 100644
--- a/core/bind/core_bind.h
+++ b/core/bind/core_bind.h
@@ -746,6 +746,7 @@ public:
 
 	void set_physics_jitter_fix(float p_threshold);
 	float get_physics_jitter_fix() const;
+	float get_physics_interpolation_fraction() const;
 
 	void set_target_fps(int p_fps);
 	int get_target_fps() const;
diff --git a/core/engine.cpp b/core/engine.cpp
index 2d8473fbd9..0dd0459403 100644
--- a/core/engine.cpp
+++ b/core/engine.cpp
@@ -227,6 +227,7 @@ Engine::Engine() {
 	frames_drawn = 0;
 	ips = 60;
 	physics_jitter_fix = 0.5;
+	_physics_interpolation_fraction = 0.0f;
 	_frame_delay = 0;
 	_fps = 1;
 	_target_fps = 0;
diff --git a/core/engine.h b/core/engine.h
index 15665fee29..192e8e67a0 100644
--- a/core/engine.h
+++ b/core/engine.h
@@ -63,6 +63,7 @@ private:
 	float _time_scale;
 	bool _pixel_snap;
 	uint64_t _physics_frames;
+	float _physics_interpolation_fraction;
 
 	uint64_t _idle_frames;
 	bool _in_physics;
@@ -95,6 +96,7 @@ public:
 	bool is_in_physics_frame() const { return _in_physics; }
 	uint64_t get_idle_frame_ticks() const { return _frame_ticks; }
 	float get_idle_frame_step() const { return _frame_step; }
+	float get_physics_interpolation_fraction() const { return _physics_interpolation_fraction; }
 
 	void set_time_scale(float p_scale);
 	float get_time_scale() const;