Add quick hack to fix movement.

Previous code would cause keys to stick.

Author: HexDecimal

src/input_movement.hpp

@@ -0,0 +1,62 @@
+#pragma once
+#include <array>
+#include <tuple>
+
+#include <SDL.h>
+
+/// @brief Simple mapping of movement keys to directions.
+struct MoveKey {
+    int scancode;
+    int dx;
+    int dy;
+};
+
+/// @brief A list of common movement keys.
+static constexpr std::array MOVE_KEYS {
+    MoveKey{SDL_SCANCODE_A, -1, 0},
+    MoveKey{SDL_SCANCODE_D, 1, 0},
+    MoveKey{SDL_SCANCODE_W, 0, -1},
+    MoveKey{SDL_SCANCODE_S, 0, 1},
+    MoveKey{SDL_SCANCODE_LEFT, -1, 0},
+    MoveKey{SDL_SCANCODE_RIGHT, 1, 0},
+    MoveKey{SDL_SCANCODE_UP, 0, -1},
+    MoveKey{SDL_SCANCODE_DOWN, 0, 1},
+    MoveKey{SDL_SCANCODE_KP_4, -1, 0},
+    MoveKey{SDL_SCANCODE_KP_6, 1, 0},
+    MoveKey{SDL_SCANCODE_KP_8, 0, -1},
+    MoveKey{SDL_SCANCODE_KP_2, 0, 1},
+
+    MoveKey{SDL_SCANCODE_KP_7, -1, -1},
+    MoveKey{SDL_SCANCODE_KP_1, -1, 1},
+    MoveKey{SDL_SCANCODE_KP_9, 1, -1},
+    MoveKey{SDL_SCANCODE_KP_3, 1, 1},
+
+    MoveKey{SDL_SCANCODE_HOME, -1, -1},
+    MoveKey{SDL_SCANCODE_END, -1, 1},
+    MoveKey{SDL_SCANCODE_PAGEUP, 1, -1},
+    MoveKey{SDL_SCANCODE_PAGEDOWN, 1, 1},
+
+    MoveKey{SDL_SCANCODE_H, -1, 0},
+    MoveKey{SDL_SCANCODE_J, 0, 1},
+    MoveKey{SDL_SCANCODE_K, 0, -1},
+    MoveKey{SDL_SCANCODE_L, 1, 0},
+    MoveKey{SDL_SCANCODE_Y, -1, -1},
+    MoveKey{SDL_SCANCODE_U, 1, -1},
+    MoveKey{SDL_SCANCODE_B, -1, 1},
+    MoveKey{SDL_SCANCODE_N, 1, 1},
+};
+
+/// @brief Return the current direction from the active keyboard state.
+/// @return A {dx, dy} tuple of all held keys.
+inline auto get_current_movement_dir() -> std::tuple<int, int> {
+    const auto* keyboard_state = SDL_GetKeyboardState(NULL);
+    int dx = 0;
+    int dy = 0;
+    for (const auto& move_key : MOVE_KEYS) {
+        if(keyboard_state[move_key.scancode]) {
+            dx += move_key.dx;
+            dy += move_key.dy;
+        }
+    }
+    return {dx, dy};
+}

src/mob_player.cpp

@@ -25,6 +25,8 @@
 */
 #include <ctype.h>
 #include <assert.h>
+
+#include "input_movement.hpp"
 #include "main.hpp"
 
 // maximum sprint : 2 times faster
@@ -355,6 +357,15 @@ bool Player::update(float elapsed, TCOD_key_t key,TCOD_mouse_t *mouse) {
 
 	bool tryToMove=Player::getMoveKey(key,&up,&down,&left,&right);
 
+	{
+		// Hack to fix movement.
+		auto [new_dx, new_dy] = get_current_movement_dir();
+		left = new_dx < 0;
+		right = new_dx > 0;
+		up = new_dy < 0;
+		down = new_dy > 0;
+	}
+
 	// mouse coordinates
 	int dungeonx=mouse->cx+gameEngine->xOffset;
 	int dungeony=mouse->cy+gameEngine->yOffset;