freed the cursor while camera is locked

src/graphics/input/focus.cpp

@@ -2,6 +2,7 @@
 #include "focus.hpp"
 #include "../camera.hpp"
 #include "../../util/math.hpp"
+#include "mouse.hpp"
 
 #include <iostream>
 
@@ -11,13 +12,23 @@
 using namespace sim::graphics;
 
 static std::unique_ptr<focus::focus_t> state = nullptr;
+static bool mouse_visible = false;
+static bool mouse_locked = false;
 static bool triggered = false;
 
 void focus::on_keypress(int key, int sc, int action, int mods)
 {
 	if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
 	{
-		state = nullptr;
+		if(is_mouse_locked())
+		{
+			clear_mouse_locked();
+		}
+
+		else
+		{
+			mouse_locked = true;
+		}
 	}
 
 	if(state)
@@ -59,6 +70,23 @@ void focus::update()
 {
 	triggered = false;
 
+	bool locked = is_mouse_locked();
+
+	if(locked != mouse_visible)
+	{
+		if(locked)
+		{
+			mouse::show_cursor();
+		}
+
+		else
+		{
+			mouse::hide_cursor();
+		}
+
+		mouse_visible = locked;
+	}
+
 	if(state)
 	{
 		state->update();
@@ -70,11 +98,22 @@ bool focus::is_focused()
 	return (state != nullptr);
 }
 
-void focus::clear()
+void focus::clear_focus()
 {
 	state = nullptr;
 }
 
+bool focus::is_mouse_locked()
+{
+	return is_focused() || mouse_locked;
+}
+
+void focus::clear_mouse_locked()
+{
+	mouse_locked = false;
+	state = nullptr;
+}
+
 void focus::set(std::unique_ptr<focus_t> f)
 {
 	state = std::move(f);

src/graphics/input/focus.hpp

@@ -16,9 +16,11 @@ struct focus_t
 	virtual void update() { }
 };
 
-void clear();
 bool is_focused();
+void clear_focus();
 bool is_triggered();
+bool is_mouse_locked();
+void clear_mouse_locked();
 void set(std::unique_ptr<focus_t> f);
 void on_keypress(int key, int sc, int action, int mods);
 void on_mouse_button(int button, int action, int mods);

src/graphics/input/mouse.cpp

@@ -13,7 +13,7 @@ static double xpos = 0, ypos = 0;
 
 static void cb_cursor_pos(GLFWwindow* win, double x, double y)
 {
-	if(focus::is_focused())
+	if(focus::is_mouse_locked())
 	{
 		focus::on_cursor_pos(x - xpos, y - ypos);
 	}
@@ -38,6 +38,24 @@ void mouse::get(double& x, double& y)
 	y = ypos;
 }
 
+void mouse::show_cursor()
+{
+	double x, y;
+	GLFWwindow* win = window::get_window();
+	glfwSetInputMode(win, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+	glfwGetCursorPos(win, &x, &y);
+	cb_cursor_pos(win, x, y);
+}
+
+void mouse::hide_cursor()
+{
+	double x, y;
+	GLFWwindow* win = window::get_window();
+	glfwSetInputMode(win, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+	glfwGetCursorPos(win, &x, &y);
+	cb_cursor_pos(win, x, y);
+}
+
 void mouse::init()
 {
 	GLFWwindow* win = window::get_window();

src/graphics/input/mouse.hpp

@@ -6,6 +6,8 @@ namespace sim::graphics::mouse
 
 void init();
 void get(double& x, double& y);
+void show_cursor();
+void hide_cursor();
 
 };