push&pull overlays while moving them

README.md

@@ -1,3 +1,3 @@
 # ovr-screen
-A SteamVR overlay for Linux+X11 that displays the screen in VR.
+A SteamVR overlay for Linux+X11 that displays all your screens in VR.
 

src/app.cpp

@@ -115,7 +115,7 @@ void App::InitGLFW()
 void App::InitRootOverlay()
 {
 	_root_overlay = Overlay(this, "root");
-	_root_overlay.SetAlpha(0.2f);
+	_root_overlay.SetAlpha(0.5f);
 	// clang-format off
 	VRMat root_start_pose = {{
 		{0.25f,	0.0f,	0.0f, 0},
@@ -124,6 +124,7 @@ void App::InitRootOverlay()
 	}};
 	// clang-format on
 	_root_overlay.SetTransformWorld(&root_start_pose);
+	_root_overlay.SetTextureToColor(110, 30, 190);
 
 	_root_overlay._GrabBeginCallback = [this](Controller *controller) {
 		for (auto &panel : _panels)
@@ -175,6 +176,8 @@ void App::UpdateInput()
 		{
 			panel.SetHidden(_hidden);
 		}
+		_controllers[0]->SetHidden(_hidden);
+		_controllers[1]->SetHidden(_hidden);
 	}
 	_controllers[0]->Update();
 	_controllers[1]->Update();
@@ -232,22 +235,19 @@ Ray App::IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len)
 	Ray ray;
 	ray.distance = max_len;
 	ray.overlay = nullptr;
+
+	auto r_root = _root_overlay.IntersectRay(origin, direction, max_len);
+	if (r_root.distance < ray.distance)
 	{
-		float root_dist = _root_overlay.IntersectRay(origin, direction, max_len);
-		if (root_dist < ray.distance)
-		{
-			ray.distance = root_dist;
-			ray.overlay = &_root_overlay;
-		}
+		ray = r_root;
 	}
 
 	for (auto &panel : _panels)
 	{
-		float dist = panel.GetOverlay()->IntersectRay(origin, direction, max_len);
-		if (dist < ray.distance)
+		auto r_panel = panel.GetOverlay()->IntersectRay(origin, direction, max_len);
+		if (r_panel.distance < ray.distance)
 		{
-			ray.distance = dist;
-			ray.overlay = panel.GetOverlay();
+			ray = r_panel;
 		}
 	}
 	return ray;

src/app.h

@@ -28,6 +28,7 @@ struct Ray
 {
 	Overlay *overlay;
 	float distance;
+	// glm::vec3 pos;
 };
 
 class App

src/controller.cpp

@@ -12,6 +12,7 @@ Controller::Controller(App *app, ControllerSide side)
 	_input_handle = 0;
 	_is_connected = false;
 	_side = side;
+	_hidden = false;
 
 	std::string laser_name = "controller_laser_";
 	if (side == ControllerSide::Left)
@@ -45,6 +46,28 @@ bool Controller::IsConnected()
 	return _is_connected;
 }
 
+void Controller::SetHidden(bool state)
+{
+	_hidden = state;
+}
+
+void Controller::RegisterGrabbedOverlay(Overlay *overlay)
+{
+	_grabbed_overlays.push_back(overlay);
+}
+
+void Controller::ReleaseOverlay(Overlay *overlay)
+{
+	for (auto i = _grabbed_overlays.begin(); i != _grabbed_overlays.end(); i++)
+	{
+		if (*i == overlay)
+		{
+			_grabbed_overlays.erase(i);
+			break;
+		}
+	}
+}
+
 void Controller::Update()
 {
 	UpdateStatus();
@@ -72,6 +95,24 @@ void Controller::Update()
 			ray.overlay->ControllerGrab(this);
 		}
 	}
+
+	if (!_grabbed_overlays.empty())
+	{
+		float move = _app->GetInputAnalog(_app->_input_handles.distance).y * 0.1; // TODO use frame time
+		if (move != 0.0f)
+		{
+			// delta is calculated & clamped for first overlay so that child overlays don't move further than the root
+			float main_z = _grabbed_overlays[0]->GetTarget()->transform.m[2][3];
+			float new_main_z = glm::clamp(main_z - move, -5.0f, -0.1f);
+			float real_delta = new_main_z - main_z;
+
+			for (auto overlay : _grabbed_overlays)
+			{
+				overlay->GetTarget()->transform.m[2][3] += real_delta;
+				_app->vr_overlay->SetOverlayTransformTrackedDeviceRelative(overlay->Id(), _device_index, &overlay->GetTarget()->transform);
+			}
+		}
+	}
 }
 
 void Controller::UpdateStatus()
@@ -91,5 +132,5 @@ void Controller::UpdateStatus()
 		_device_index = _app->vr_sys->GetTrackedDeviceIndexForControllerRole(vr::TrackedControllerRole_RightHand);
 	}
 	_is_connected &= _device_index < MAX_TRACKERS;
-	_laser.SetHidden(!_is_connected);
+	_laser.SetHidden(!_is_connected || _hidden);
 }

src/controller.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "overlay.h"
 #include "util.h"
+#include <vector>
 
 class App;
 
@@ -20,6 +21,11 @@ class Controller
 
 	bool IsConnected();
 
+	void SetHidden(bool state);
+
+	void RegisterGrabbedOverlay(Overlay *overlay);
+	void ReleaseOverlay(Overlay *overlay);
+
 	void Update();
 	void UpdateStatus();
 
@@ -30,4 +36,6 @@ class Controller
 	TrackerID _device_index;
 	vr::VRInputValueHandle_t _input_handle;
 	bool _is_connected;
+	bool _hidden;
+	std::vector<Overlay *> _grabbed_overlays;
 };

src/overlay.cpp

@@ -2,7 +2,6 @@
 #include "app.h"
 #include "util.h"
 #include <cstdint>
-#include <glm/fwd.hpp>
 
 Overlay::Overlay()
 {
@@ -137,7 +136,7 @@ void Overlay::SetTargetWorld()
 	_target.type = TargetType::World;
 }
 
-float Overlay::IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len)
+Ray Overlay::IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len)
 {
 	float closest_dist = max_len;
 	auto end = origin + direction * max_len;
@@ -162,7 +161,7 @@ float Overlay::IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len
 			closest_dist = dist;
 		}
 	}
-	return closest_dist;
+	return Ray{.overlay = this, .distance = closest_dist /* , .pos = p */};
 }
 
 glm::mat4x4 Overlay::GetTransformAbsolute()
@@ -198,6 +197,11 @@ glm::mat4x4 Overlay::GetTransformAbsolute()
 	}
 }
 
+Target *Overlay::GetTarget()
+{
+	return &_target;
+}
+
 void Overlay::Update()
 {
 	if (!_initialized)
@@ -224,7 +228,9 @@ void Overlay::ControllerGrab(Controller *controller)
 	VRMat relative_pose = ConvertMat(glm::inverse(controller_mat) * abs_mat);
 
 	_app->vr_overlay->SetOverlayTransformTrackedDeviceRelative(_id, controller->DeviceIndex(), &relative_pose);
+	_target.transform = relative_pose;
 
+	controller->RegisterGrabbedOverlay(this);
 	if (_GrabBeginCallback != nullptr)
 	{
 		_GrabBeginCallback(controller);
@@ -235,6 +241,7 @@ void Overlay::ControllerGrab(Controller *controller)
 
 void Overlay::ControllerRelease()
 {
+	_holding_controller->ReleaseOverlay(this);
 	_app->vr_overlay->SetOverlayColor(_id, 1.0f, 1.0f, 1.0f);
 
 	auto new_pose = ConvertMat(GetTransformAbsolute());

src/overlay.h

@@ -5,6 +5,7 @@
 #include <string>
 
 class App;
+struct Ray;
 class Controller;
 
 enum class TargetType
@@ -43,6 +44,7 @@ class Overlay
 	void SetTextureToColor(uint8_t r, uint8_t g, uint8_t b);
 
 	glm::mat4x4 GetTransformAbsolute();
+	Target *GetTarget();
 
 	void SetTransformTracker(TrackerID tracker, const VRMat *transform);
 	void SetTransformWorld(const VRMat *transform);
@@ -50,7 +52,7 @@ class Overlay
 	// void SetTargetTracker(TrackerID tracker);
 	void SetTargetWorld();
 
-	float IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len);
+	Ray IntersectRay(glm::vec3 origin, glm::vec3 direction, float max_len);
 
 	std::function<void(Controller *)> _GrabBeginCallback;
 	std::function<void()> _GrabEndCallback;