Initial camera control code added

src/modules/stream/world_editor.cpp

@@ -1,8 +1,12 @@
 #include <core/object.h>
 #include <core/engine.h>
+#include <core/os/input.h>
+#include <core/input_map.h>
 #include <scene/gui/control.h>
 #include <scene/gui/box_container.h>
 #include <scene/gui/button.h>
+#include <scene/main/viewport.h>
+#include <scene/3d/camera.h>
 #include <scene/scene_string_names.h>
 #include "world_editor.h"
 
@@ -12,7 +16,21 @@ WorldEditor::WorldEditor()
 	, editor_menu(nullptr)
 	, current_mode(-1)
 	, current_camera_mode(-1)
+	, motion(Vector2())
+	, old_mouse_pos(Vector2(-1, -1))
 {
+	if (!InputMap::get_singleton()->has_action("left"))
+		InputMap::get_singleton()->add_action("left");
+	if (!InputMap::get_singleton()->has_action("right"))
+		InputMap::get_singleton()->add_action("right");
+	if (!InputMap::get_singleton()->has_action("backward"))
+		InputMap::get_singleton()->add_action("backward");
+	if (!InputMap::get_singleton()->has_action("forward"))
+		InputMap::get_singleton()->add_action("forward");
+	if (!InputMap::get_singleton()->has_action("action"))
+		InputMap::get_singleton()->add_action("action");
+	if (!InputMap::get_singleton()->has_action("action2"))
+		InputMap::get_singleton()->add_action("action2");
 }
 
 WorldEditor::~WorldEditor()
@@ -21,7 +39,43 @@ WorldEditor::~WorldEditor()
 
 void WorldEditor::set_camera_mode(int mode)
 {
+	print_line("set_camera_mode: " + itos(mode));
+	bool update_transform = false;
+	Camera *cam = get_viewport()->get_camera();
+	if (!cam)
+		return;
+	Transform cam_xform = cam->get_global_transform();
+	if (current_camera_mode == -1) {
+		cam_xform.origin.y = 80.0f;
+		update_transform = true;
+	}
 	current_camera_mode = mode;
+	switch (mode) {
+	case 0:
+		break;
+	case 1:
+		Input::get_singleton()->set_mouse_mode(
+			Input::MOUSE_MODE_CAPTURED);
+		cam_xform.basis =
+			Basis().rotated(Vector3(1, 0, 0), -Math_PI / 2.0);
+		update_transform = true;
+		break;
+	case 2:
+		Input::get_singleton()->set_mouse_mode(
+			Input::MOUSE_MODE_CAPTURED);
+		cam_xform.basis =
+			Basis().rotated(Vector3(1, 0, 0), -Math_PI / 4.0);
+		update_transform = true;
+		break;
+	case 3:
+		Input::get_singleton()->set_mouse_mode(
+			Input::MOUSE_MODE_VISIBLE);
+		break;
+	default:
+		break;
+	}
+	if (update_transform)
+		cam->set_global_transform(cam_xform);
 }
 
 int WorldEditor::get_camera_mode() const
@@ -190,12 +244,60 @@ void WorldEditor::_notification(int which)
 					    "world_command_result");
 			}
 		}
+		set_process_unhandled_input(true);
 	} break;
 	case NOTIFICATION_EXIT_TREE:
+		set_process_unhandled_input(false);
 		break;
+	case NOTIFICATION_PHYSICS_PROCESS: {
+		if (!is_inside_tree())
+			return;
+		Camera *cam = get_viewport()->get_camera();
+		if (!cam)
+			return;
+		float delta = get_physics_process_delta_time();
+		Transform cam_xform = cam->get_global_transform();
+		if (current_camera_mode == 1) {
+			Vector2 mouse_pos =
+				get_viewport()->get_mouse_position();
+			if (old_mouse_pos.x < 0) {
+				old_mouse_pos = mouse_pos;
+				motion = Vector2();
+			} else {
+				motion = mouse_pos - old_mouse_pos;
+				old_mouse_pos = mouse_pos;
+			}
+			bool moved = false;
+			float h = cam_xform.origin.y;
+			float xx = Input::get_singleton()->get_axis("left",
+								    "right");
+			float zz = Input::get_singleton()->get_axis("backward",
+								    "forward");
+			float hh = Input::get_singleton()->get_axis("action2",
+								    "action");
+			if (Math::abs(zz) > 0.1f) {
+				cam_xform.origin.z -= Math::abs(h) * zz * delta;
+				moved = true;
+			}
+			if (Math::abs(xx) > 0.1f) {
+				cam_xform.origin.x += Math::abs(h) * xx * delta;
+				moved = true;
+			}
+			if (Math::abs(hh) > 0.1f && Math::abs(xx) < 0.1f &&
+			    Math::abs(zz) < 0.1f) {
+				cam_xform.origin.y += 10.0f * hh * delta;
+				moved = true;
+			}
+		}
+	} break;
 	}
 }
 
+void WorldEditor::_unhandled_input(const Ref<InputEvent> &event)
+{
+	print_line("unhandled_input: " + event->as_text());
+}
+
 void WorldEditor::world_exited()
 {
 	stream_world = nullptr;
@@ -217,6 +319,8 @@ void WorldEditor::_bind_methods()
 			     &WorldEditor::set_camera_mode);
 	ClassDB::bind_method(D_METHOD("get_camera_mode"),
 			     &WorldEditor::get_camera_mode);
+	ClassDB::bind_method(D_METHOD("_unhandled_input", "event"),
+			     &WorldEditor::_unhandled_input);
 	ADD_SIGNAL(MethodInfo("editor_event",
 			      PropertyInfo(Variant::STRING, "event_name"),
 			      PropertyInfo(Variant::ARRAY, "args")));

src/modules/stream/world_editor.h

@@ -21,12 +21,15 @@ protected:
 	StreamWorld *get_stream_world();
 	void world_command_result(const String &what, const Array &data);
 	void _notification(int which);
+	void _unhandled_input(const Ref<InputEvent> &event);
 	static void _bind_methods();
 
 private:
 	void world_exited();
 	int current_mode;
 	int current_camera_mode;
+	Vector2 motion;
+	Vector2 old_mouse_pos;
 
 public:
 	WorldEditor();