Add whatever I was working on for the last month

1 files changed, 138 insertions, 0 deletions

diff --git a/game/client/gamepad.cc b/game/client/gamepad.cc
new file mode 100644
index 0000000..73c60b6
--- /dev/null
+++ b/game/client/gamepad.cc
@@ -0,0 +1,138 @@
+#include "client/pch.hh"
+#include "client/gamepad.hh"
+
+#include "core/cmdline.hh"
+#include "core/config.hh"
+#include "core/constexpr.hh"
+
+#include "client/glfw.hh"
+#include "client/globals.hh"
+#include "client/settings.hh"
+
+constexpr static int INVALID_GAMEPAD_ID = INT_MAX;
+constexpr static std::size_t NUM_AXES = static_cast<std::size_t>(GLFW_GAMEPAD_AXIS_LAST + 1);
+constexpr static std::size_t NUM_BUTTONS = static_cast<std::size_t>(GLFW_GAMEPAD_BUTTON_LAST + 1);
+constexpr static float GAMEPAD_AXIS_EVENT_THRESHOLD = 0.5f;
+
+static int active_gamepad_id;
+
+bool gamepad::available = false;
+ConfigFloat gamepad::deadzone(0.00f, 0.00f, 0.66f);
+ConfigBoolean gamepad::active(false);
+GLFWgamepadstate gamepad::state;
+GLFWgamepadstate gamepad::last_state;
+
+static void on_glfw_joystick_event(const GlfwJoystickEvent &event)
+{
+    if((event.event_type == GLFW_CONNECTED) && glfwJoystickIsGamepad(event.joystick_id) && (active_gamepad_id == INVALID_GAMEPAD_ID)) {
+        gamepad::available = true;
+
+        active_gamepad_id = event.joystick_id;
+
+        for(int i = 0; i < NUM_AXES; gamepad::last_state.axes[i++] = 0.0f);
+        for(int i = 0; i < NUM_BUTTONS; gamepad::last_state.buttons[i++] = GLFW_RELEASE);
+
+        spdlog::warn("gamepad: detected gamepad: {}", glfwGetGamepadName(event.joystick_id));
+
+        return;
+    }
+
+    if((event.event_type == GLFW_DISCONNECTED) && (active_gamepad_id == event.joystick_id)) {
+        gamepad::available = false;
+
+        active_gamepad_id = INVALID_GAMEPAD_ID;
+
+        for(int i = 0; i < NUM_AXES; gamepad::last_state.axes[i++] = 0.0f);
+        for(int i = 0; i < NUM_BUTTONS; gamepad::last_state.buttons[i++] = GLFW_RELEASE);
+
+        spdlog::warn("gamepad: disconnected");
+
+        return;
+    }
+}
+
+void gamepad::init(void)
+{
+    gamepad::available = false;
+
+    active_gamepad_id = INVALID_GAMEPAD_ID;
+
+    globals::client_config.add_value("gamepad.deadzone", gamepad::deadzone);
+    globals::client_config.add_value("gamepad.active", gamepad::active);
+
+    settings::add_checkbox(0, gamepad::active, settings_location::GAMEPAD, "gamepad.active", true);
+    settings::add_slider(1, gamepad::deadzone, settings_location::GAMEPAD, "gamepad.deadzone", true, "%.03f");
+
+    auto mappings_path = cmdline::get("gpmap", "misc/gamecontrollerdb.txt");
+    auto mappings_file = PHYSFS_openRead(mappings_path);
+
+    if(mappings_file) {
+        spdlog::info("gamepad: using mappings from {}", mappings_path);
+        auto mappings_string = std::string(PHYSFS_fileLength(mappings_file), char(0x00));
+        PHYSFS_readBytes(mappings_file, mappings_string.data(), mappings_string.size());
+        glfwUpdateGamepadMappings(mappings_string.c_str());
+        PHYSFS_close(mappings_file);
+    }
+
+    for(int joystick = 0; joystick <= GLFW_JOYSTICK_LAST; joystick += 1) {
+        if(glfwJoystickIsGamepad(joystick)) {
+            gamepad::available = true;
+
+            active_gamepad_id = joystick;
+
+            for(int i = 0; i < NUM_AXES; gamepad::last_state.axes[i++] = 0.0f);
+            for(int i = 0; i < NUM_BUTTONS; gamepad::last_state.buttons[i++] = GLFW_RELEASE);
+
+            spdlog::warn("gamepad: detected gamepad: {}", glfwGetGamepadName(joystick));
+
+            break;
+        }
+    }
+
+    for(int i = 0; i < NUM_AXES; gamepad::state.axes[i++] = 0.0f);
+    for(int i = 0; i < NUM_BUTTONS; gamepad::state.buttons[i++] = GLFW_RELEASE);
+
+    globals::dispatcher.sink<GlfwJoystickEvent>().connect<&on_glfw_joystick_event>();
+}
+
+void gamepad::update_late(void)
+{
+    if(active_gamepad_id == INVALID_GAMEPAD_ID) {
+        // No active gamepad found
+        return;
+    }
+
+    if(glfwGetGamepadState(active_gamepad_id, &gamepad::state)) {
+        for(int i = 0; i < NUM_AXES; ++i) {
+            if((cxpr::abs(gamepad::state.axes[i]) > GAMEPAD_AXIS_EVENT_THRESHOLD) && (cxpr::abs(gamepad::last_state.axes[i]) <= GAMEPAD_AXIS_EVENT_THRESHOLD)) {
+                GamepadAxisEvent event;
+                event.action = GLFW_PRESS;
+                event.axis = i;
+                globals::dispatcher.enqueue(event);
+                continue;
+            }
+
+            if((cxpr::abs(gamepad::state.axes[i]) <= GAMEPAD_AXIS_EVENT_THRESHOLD) && (cxpr::abs(gamepad::last_state.axes[i]) > GAMEPAD_AXIS_EVENT_THRESHOLD)) {
+                GamepadAxisEvent event;
+                event.action = GLFW_RELEASE;
+                event.axis = i;
+                globals::dispatcher.enqueue(event);
+                continue;
+            }
+        }
+
+        for(int i = 0; i < NUM_BUTTONS; ++i) {
+            if(gamepad::state.buttons[i] == gamepad::last_state.buttons[i]) {
+                // Nothing happens
+                continue;
+            }
+
+            GamepadButtonEvent event;
+            event.action = gamepad::state.buttons[i];
+            event.button = i;
+            globals::dispatcher.enqueue(event);
+        }
+    }
+
+    gamepad::last_state = gamepad::state;
+}