Add physics solver settings to project settings

Helps with discovery and setup of physics solver settings, in a specific
project settings section for both 2D and 3D.

Other changes for cleanup:
-Removed unused space parameters in 3D
SPACE_PARAM_BODY_ANGULAR_VELOCITY_DAMP_RATIO
SPACE_PARAM_CONSTRAINT_DEFAULT_BIAS
-Added custom solver bias for Shape3D (same as Shape2D)
-Improved documentation for solver settings

2 files changed, 17 insertions, 0 deletions

diff --git a/scene/resources/shape_3d.cpp b/scene/resources/shape_3d.cpp
index a02a0e5488..044268864a 100644
--- a/scene/resources/shape_3d.cpp
+++ b/scene/resources/shape_3d.cpp
@@ -48,6 +48,15 @@ void Shape3D::add_vertices_to_array(Vector<Vector3> &array, const Transform3D &p
 	}
 }
 
+void Shape3D::set_custom_solver_bias(real_t p_bias) {
+	custom_bias = p_bias;
+	PhysicsServer3D::get_singleton()->shape_set_custom_solver_bias(shape, custom_bias);
+}
+
+real_t Shape3D::get_custom_solver_bias() const {
+	return custom_bias;
+}
+
 real_t Shape3D::get_margin() const {
 	return margin;
 }
@@ -99,11 +108,15 @@ void Shape3D::_update_shape() {
 }
 
 void Shape3D::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_custom_solver_bias", "bias"), &Shape3D::set_custom_solver_bias);
+	ClassDB::bind_method(D_METHOD("get_custom_solver_bias"), &Shape3D::get_custom_solver_bias);
+
 	ClassDB::bind_method(D_METHOD("set_margin", "margin"), &Shape3D::set_margin);
 	ClassDB::bind_method(D_METHOD("get_margin"), &Shape3D::get_margin);
 
 	ClassDB::bind_method(D_METHOD("get_debug_mesh"), &Shape3D::get_debug_mesh);
 
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "custom_solver_bias", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_custom_solver_bias", "get_custom_solver_bias");
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "margin", PROPERTY_HINT_RANGE, "0.001,10,0.001"), "set_margin", "get_margin");
 }
 
diff --git a/scene/resources/shape_3d.h b/scene/resources/shape_3d.h
index b8e529cd3c..f3a7aa5b12 100644
--- a/scene/resources/shape_3d.h
+++ b/scene/resources/shape_3d.h
@@ -40,6 +40,7 @@ class Shape3D : public Resource {
 	OBJ_SAVE_TYPE(Shape3D);
 	RES_BASE_EXTENSION("shape");
 	RID shape;
+	real_t custom_bias = 0.0;
 	real_t margin = 0.04;
 
 	Ref<ArrayMesh> debug_mesh_cache;
@@ -62,6 +63,9 @@ public:
 
 	void add_vertices_to_array(Vector<Vector3> &array, const Transform3D &p_xform);
 
+	void set_custom_solver_bias(real_t p_bias);
+	real_t get_custom_solver_bias() const;
+
 	real_t get_margin() const;
 	void set_margin(real_t p_margin);