Normalized movements

diff --git a/public/cattoland/cattoland.js b/public/cattoland/cattoland.js
index 550f639a0b018519033624d3a3eefc7d2a458df7..56c7bf09379918ee3d06b42d89156b6aba187153 100644 (file)
--- a/public/cattoland/cattoland.js
+++ b/public/cattoland/cattoland.js
@@ -41,6 +41,10 @@ let entities = [];
 
 let player;
 
+const event_strength = (event) => {
+    return events.get(event) ? 1 : 0;  
+};
+
 const image_load = (images, path) => {
     let image = new Image();
     image.src = path;
@@ -100,6 +104,10 @@ const catto_init = () => {
     return entity;
 };
 
+const vec_length = (x, y) => {
+    return Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
+};
+
 const main = () => {
     image_load(images, "cattoland/catto.png");
     image_load(images, "cattoland/shadow.png");
@@ -128,37 +136,28 @@ const main = () => {
 
 const loop = (delta) => {
     { // Events.
-        let moving = false;
+        let dir_x = event_strength("KeyD") - event_strength("KeyA");
+        let dir_y = event_strength("KeyS") - event_strength("KeyW");
 
-        if (events.get("KeyW") === "down") {
-            player.y -= player.speed;
-            moving = true;
-        }
+        let dir_len = vec_length(dir_x, dir_y);
 
-        if (events.get("KeyA") === "down") {
-            player.x -= player.speed;
-            moving = true;
+        if (dir_len !== 0) {
+            let unit_x = dir_x / dir_len;
+            let unit_y = dir_y / dir_len;
 
-            if (player.anim !== "move_left") {
-                entity_play_anim(player, "move_left");
-            }
+            player.x += player.speed * unit_x;
+            player.y += player.speed * unit_y;
         }
 
-        if (events.get("KeyS") === "down") {
-            player.y += player.speed;
-            moving = true;
+        if (dir_x < 0 && player.anim !== "move_left") {
+            entity_play_anim(player, "move_left");
         }
 
-        if (events.get("KeyD") === "down") {
-            player.x += player.speed;
-            moving = true;
-
-            if (player.anim !== "move_right") {
-                entity_play_anim(player, "move_right");
-            }
+        if (dir_x > 0 && player.anim !== "move_right") {
+            entity_play_anim(player, "move_right");
         }
 
-        if (!moving) {
+        if (dir_x === 0 && dir_y === 0) {
             if (player.anim === "move_right") {
                 entity_play_anim(player, "idle_right");
             }
@@ -166,6 +165,14 @@ const loop = (delta) => {
             if (player.anim === "move_left") {
                 entity_play_anim(player, "idle_left");
             }
+        } else {
+            if (player.anim === "idle_right") {
+                entity_play_anim(player, "move_right");
+            }
+
+            if (player.anim === "idle_left") {
+                entity_play_anim(player, "move_left");
+            }
         }
 
         for (let entity of entities) {