add scrolling

Makefile

@@ -1,4 +1,4 @@
-VERSION=v0.2.0
+VERSION=v0.2.1
 # CC := g++
 CC := clang++
 LFLAGS := -lX11 -lXrandr -lXtst -lglfw -lGL

bindings/action_manifest.json

@@ -45,6 +45,16 @@
 			"name": "/actions/cursor/in/mouse_right",
 			"requirement": "suggested",
 			"type": "boolean"
+		},
+		{
+			"name": "/actions/cursor/in/mouse_middle",
+			"requirement": "optional",
+			"type": "boolean"
+		},
+		{
+			"name": "/actions/cursor/in/scroll",
+			"requirement": "suggested",
+			"type": "vector2"
 		}
 	],
 	"action_sets": [
@@ -70,8 +80,10 @@
 			"/actions/edit/in/grab": "grab panel",
 			"/actions/edit/in/distance": "push/pull overlay",
 			"/actions/cursor/in/activate_cursor": "activate cursor",
-			"/actions/cursor/in/mouse_left": "mouse left",
+			"/actions/cursor/in/mouse_left": "left mouse button",
-			"/actions/cursor/in/mouse_right": "mouse right"
+			"/actions/cursor/in/mouse_right": "right mouse button",
+			"/actions/cursor/in/mouse_middle": "middle mouse button",
+			"/actions/cursor/in/scroll": "scroll"
 		}
 	]
 }

bindings/index_controller.json

@@ -195,6 +195,24 @@
                },
                "mode" : "button",
                "path" : "/user/hand/right/input/trackpad"
+            },
+            {
+               "inputs" : {
+                  "position" : {
+                     "output" : "/actions/cursor/in/scroll"
+                  }
+               },
+               "mode" : "joystick",
+               "path" : "/user/hand/left/input/thumbstick"
+            },
+            {
+               "inputs" : {
+                  "position" : {
+                     "output" : "/actions/cursor/in/scroll"
+                  }
+               },
+               "mode" : "joystick",
+               "path" : "/user/hand/right/input/thumbstick"
             }
          ]
       },

src/app.cpp

@@ -9,6 +9,8 @@
 
 const VRMat root_start_pose = {{{1, 0, 0, 0}, {0, 1, 0, 0.8f}, {0, 0, 1, 0}}}; // 0.8m above origin
 
+const int FRAME_INTERVAL = 4; // number of update loops until the frame buffer is updated
+
 App::App()
 {
 	_tracking_origin = vr::TrackingUniverseStanding;
@@ -69,6 +71,10 @@ App::App()
 		assert(action_err == 0);
 		action_err = vr_input->GetActionHandle("/actions/cursor/in/mouse_right", &_input_handles.cursor.mouse_right);
 		assert(action_err == 0);
+		action_err = vr_input->GetActionHandle("/actions/cursor/in/mouse_middle", &_input_handles.cursor.mouse_middle);
+		assert(action_err == 0);
+		action_err = vr_input->GetActionHandle("/actions/cursor/in/scroll", &_input_handles.cursor.scroll);
+		assert(action_err == 0);
 		action_err = vr_input->GetActionSetHandle("/actions/main", &_input_handles.main_set);
 		assert(action_err == 0);
 		action_err = vr_input->GetActionSetHandle("/actions/edit", &_input_handles.edit_set);
@@ -138,9 +144,9 @@ void App::InitRootOverlay()
 	_root_overlay.SetTextureToColor(110, 30, 190);
 }
 
-void App::Update()
+void App::Update(float dtime)
 {
-	UpdateInput();
+	UpdateInput(dtime);
 	if (!_hidden)
 	{
 		_root_overlay.Update();
@@ -153,7 +159,7 @@ void App::Update()
 	_frames_since_framebuffer += 1;
 }
 
-void App::UpdateInput()
+void App::UpdateInput(float dtime)
 {
 	vr::VRActiveActionSet_t active_sets[2];
 	active_sets[0].ulActionSet = _input_handles.main_set;
@@ -206,8 +212,8 @@ void App::UpdateInput()
 			}
 		}
 	}
-	_controllers[0]->Update();
+	_controllers[0]->Update(dtime);
-	_controllers[1]->Update();
+	_controllers[1]->Update(dtime);
 }
 
 void App::UpdateUIVisibility()
@@ -218,7 +224,7 @@ void App::UpdateUIVisibility()
 
 void App::UpdateFramebuffer()
 {
-	if (_frames_since_framebuffer < 2)
+	if (_frames_since_framebuffer < FRAME_INTERVAL)
 	{
 		return;
 	}

src/app.h

@@ -30,6 +30,8 @@ struct InputHandles
 		vr::VRActionHandle_t activate;
 		vr::VRActionHandle_t mouse_left;
 		vr::VRActionHandle_t mouse_right;
+		vr::VRActionHandle_t mouse_middle;
+		vr::VRActionHandle_t scroll;
 	} cursor;
 	vr::VRActionSetHandle_t cursor_set;
 	struct
@@ -45,7 +47,7 @@ class App
   public:
 	App();
 	~App();
-	void Update();
+	void Update(float dtime);
 
 	std::vector<TrackerID> GetControllers();
 	glm::mat4 GetTrackerPose(TrackerID tracker);
@@ -94,6 +96,6 @@ class App
 	void InitRootOverlay();
 
 	void UpdateFramebuffer();
-	void UpdateInput();
+	void UpdateInput(float dtime);
 	void UpdateUIVisibility();
 };

src/controller.cpp

@@ -4,9 +4,10 @@
 #include "util.h"
 #include <string>
 
-const float laser_width = 0.004f;
+const float LASER_WIDTH = 0.004f;
-const Color edit_col{1, 0.6f, 1};
+const Color EDIT_COLOR{1, 0.6f, 1};
-const Color cursor_col{0.3f, 1, 1};
+const Color CURSOR_COLOR{0.3f, 1, 1};
+const float SCROLL_SPEED = 48.0f;
 
 Controller::Controller(App *app, ControllerSide side)
 {
@@ -16,6 +17,7 @@ Controller::Controller(App *app, ControllerSide side)
 	_is_connected = false;
 	_side = side;
 	_cursor_active = false;
+	_last_sent_scroll = 0;
 
 	std::string laser_name = "controller_laser_";
 	if (side == ControllerSide::Left)
@@ -70,7 +72,7 @@ glm::vec3 Controller::GetLastRot()
 	return _last_rotation;
 }
 
-void Controller::Update()
+void Controller::Update(float dtime)
 {
 	UpdateStatus();
 	if (!_is_connected)
@@ -80,7 +82,7 @@ void Controller::Update()
 
 	if (_app->_edit_mode)
 	{
-		_laser.SetColor(edit_col);
+		_laser.SetColor(EDIT_COLOR);
 		if (_last_ray.overlay != nullptr)
 		{
 			auto ray = _last_ray;
@@ -100,7 +102,7 @@ void Controller::Update()
 
 		if (_grabbed_overlay != nullptr)
 		{
-			float move = _app->GetInputAnalog(_app->_input_handles.edit.distance, _input_handle).y * 0.1; // TODO use frame time
+			float move = _app->GetInputAnalog(_app->_input_handles.edit.distance, _input_handle).y * dtime * 8;
 			if (move != 0.0f)
 			{
 				auto transform = _grabbed_overlay->GetTarget()->transform;
@@ -120,7 +122,7 @@ void Controller::Update()
 			}
 			_cursor_active = !_cursor_active;
 			_app->_active_cursor = this;
-			_laser.SetColor(cursor_col);
+			_laser.SetColor(CURSOR_COLOR);
 		}
 		if (_cursor_active)
 		{
@@ -139,19 +141,40 @@ void Controller::Update()
 				pos *= _last_ray.hit_panel->Width();
 				_last_ray.hit_panel->SetCursor(pos.x, pos.y);
 			}
-			auto mouse_left = _app->GetInputDigital(_app->_input_handles.cursor.mouse_left, _input_handle);
+			UpdateMouseButton(_app->_input_handles.cursor.mouse_left, 1);
-			if (mouse_left.bChanged)
+			UpdateMouseButton(_app->_input_handles.cursor.mouse_middle, 2);
+			UpdateMouseButton(_app->_input_handles.cursor.mouse_right, 3);
+			auto scroll_state = _app->GetInputAnalog(_app->_input_handles.cursor.scroll, _input_handle);
+			if (scroll_state.y != 0)
 			{
-				_app->SendMouseInput(1, mouse_left.bState);
+				_last_sent_scroll += dtime * glm::abs(scroll_state.y) * SCROLL_SPEED;
-			}
+				if (_last_sent_scroll > 1)
-			auto mouse_right = _app->GetInputDigital(_app->_input_handles.cursor.mouse_right, _input_handle);
-			if (mouse_right.bChanged)
 				{
-				_app->SendMouseInput(3, mouse_right.bState);
+					_last_sent_scroll = 0;
+					if (scroll_state.y > 0)
+					{
+						_app->SendMouseInput(4, true);
+						_app->SendMouseInput(4, false);
+					}
+					else if (scroll_state.y < 0)
+					{
+						_app->SendMouseInput(5, true);
+						_app->SendMouseInput(5, false);
 					}
 				}
 			}
 		}
+	}
+}
+
+void Controller::UpdateMouseButton(vr::VRActionHandle_t binding, unsigned int button)
+{
+	auto state = _app->GetInputDigital(binding, _input_handle);
+	if (state.bChanged)
+	{
+		_app->SendMouseInput(button, state.bState);
+	}
+}
 
 void Controller::UpdateLaser()
 {
@@ -170,7 +193,7 @@ void Controller::UpdateLaser()
 	hmd_local_pos.z = 0;
 	auto hmd_dir = glm::normalize(hmd_local_pos);
 
-	VRMat transform = {{{laser_width * hmd_dir.y, 0, laser_width * hmd_dir.x, 0}, {laser_width * -hmd_dir.x, 0, laser_width * hmd_dir.y, 0}, {0, len, 0, len * -0.5f}}};
+	VRMat transform = {{{LASER_WIDTH * hmd_dir.y, 0, LASER_WIDTH * hmd_dir.x, 0}, {LASER_WIDTH * -hmd_dir.x, 0, LASER_WIDTH * hmd_dir.y, 0}, {0, len, 0, len * -0.5f}}};
 	_laser.SetTransformTracker(_device_index, &transform);
 	_laser.SetHidden(!_is_connected || _app->_hidden || (!_app->_edit_mode && !_cursor_active));
 }

src/controller.h

@@ -26,7 +26,7 @@ class Controller
 
 	void ReleaseOverlay();
 
-	void Update();
+	void Update(float dtime);
 
 	bool _cursor_active;
 
@@ -34,6 +34,8 @@ class Controller
 	void UpdateStatus();
 	void UpdateLaser();
 
+	void UpdateMouseButton(vr::VRActionHandle_t binding, unsigned int button);
+
 	App *_app;
 	Overlay _laser;
 	ControllerSide _side;
@@ -47,4 +49,6 @@ class Controller
 	Ray _last_ray;
 	glm::vec3 _last_rotation;
 	glm::vec3 _last_pos;
+
+	float _last_sent_scroll;
 };

src/main.cpp

@@ -1,7 +1,7 @@
 #include "app.h"
 #include <signal.h>
 
-#define UPDATE_RATE 60
+#define UPDATE_RATE 120
 
 bool should_exit = false;
 
@@ -18,8 +18,8 @@ int main()
 
 	while (!should_exit)
 	{
-		app.Update();
 		usleep(1000000 / UPDATE_RATE);
+		app.Update(1.0 / UPDATE_RATE);
 	}
 	printf("\nShutting down\n");
 	return 0;