zoom inertia uses its own setting (not the same then translation)

editor/editor_settings.cpp

@@ -677,6 +677,9 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 
 	set("editors/3d/orbit_sensitivity", 0.4);
 
+	set("editors/3d/zoom_inertia", 0.1);
+	hints["editors/3d/zoom_inertia"] = PropertyInfo(Variant::REAL, "editors/3d/zoom_inertia", PROPERTY_HINT_RANGE, "0.0, 1, 0.01");
+
 	set("editors/3d/orbit_inertia", 0.2);
 	hints["editors/3d/orbit_inertia"] = PropertyInfo(Variant::REAL, "editors/3d/orbit_inertia", PROPERTY_HINT_RANGE, "0.0, 1, 0.01");
 

editor/plugins/spatial_editor_plugin.cpp

@@ -83,6 +83,8 @@ void SpatialEditorViewport::_update_camera(float p_interp_delta) {
 	float manip_orbit_inertia = EDITOR_DEF("editors/3d/manipulation_orbit_inertia", 0.075);
 	float manip_translation_inertia = EDITOR_DEF("editors/3d/manipulation_translation_inertia", 0.075);
 
+	float zoom_inertia = EDITOR_DEF("editors/3d/zoom_inertia", 0.0);
+
 	//determine if being manipulated
 	bool manipulated = (Input::get_singleton()->get_mouse_button_mask() & (2 | 4)) || Input::get_singleton()->is_key_pressed(KEY_SHIFT) || Input::get_singleton()->is_key_pressed(KEY_ALT) || Input::get_singleton()->is_key_pressed(KEY_CONTROL);
 
@@ -96,7 +98,7 @@ void SpatialEditorViewport::_update_camera(float p_interp_delta) {
 	camera_cursor.y_rot = Math::lerp(old_camera_cursor.y_rot, cursor.y_rot, MIN(1.f, p_interp_delta * (1 / orbit_inertia)));
 
 	camera_cursor.pos = old_camera_cursor.pos.linear_interpolate(cursor.pos, MIN(1.f, p_interp_delta * (1 / translation_inertia)));
-	camera_cursor.distance = Math::lerp(old_camera_cursor.distance, cursor.distance, MIN(1.f, p_interp_delta * (1 / translation_inertia)));
+	camera_cursor.distance = Math::lerp(old_camera_cursor.distance, cursor.distance, MIN(1.f, p_interp_delta * (1 / zoom_inertia)));
 
 	if (p_interp_delta == 0 || is_freelook_active()) {
 		camera_cursor = cursor;