Arrow and vim keys support (#43)

accept arrows and hjkl as movement input too

Cnange opening text to mention these control options

Reviewed-on: #43
Co-authored-by: Kistaro Windrider <kistaro@gmail.com>
Co-committed-by: Kistaro Windrider <kistaro@gmail.com>

src/engine/internal/input.ts

@@ -111,6 +111,14 @@ class Input {
     return this.#mousePosition;
   }
 
+  isAnyKeyDown(...keys: string[]) : boolean {
+    for (const k of keys) {
+      if(this.isKeyDown(k)) {
+        return true
+      }
+    }
+    return false
+  }
   isKeyDown(key: string): boolean {
     return this.#keyDown[key];
   }

src/huntmode.ts

@@ -155,19 +155,19 @@ export class HuntMode {
 
     let mvdx = 0;
     let mvdy = 0;
-    if (I.isKeyDown("w")) {
+    if (I.isAnyKeyDown("w", "k", "ArrowUp")) {
       touched = true;
       mvdy -= amt;
     }
-    if (I.isKeyDown("s")) {
+    if (I.isAnyKeyDown("s", "j", "ArrowDown")) {
       touched = true;
       mvdy += amt;
     }
-    if (I.isKeyDown("a")) {
+    if (I.isAnyKeyDown("a", "h", "ArrowLeft")) {
       touched = true;
       mvdx -= amt;
     }
-    if (I.isKeyDown("d")) {
+    if (I.isAnyKeyDown("d", "l", "ArrowRight")) {
       touched = true;
       mvdx += amt;
     }

src/openingscene.ts

@@ -17,5 +17,5 @@ Your Progenitor
 
 
 
-PS: Left mouse + WASD. Like Quake!`,
+PS: Left mouse + WASD. Like Quake! Arrows or HJKL work too.`,
 ]);