From d89f038b7a5eb42dd48d729d8808747d5cbc182b Mon Sep 17 00:00:00 2001
From: tslil clingman <>
Date: Sun, 12 Sep 2021 21:40:58 -0400
Subject: Walk bob and collision detection

---
 src/main.zig | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

(limited to 'src/main.zig')

diff --git a/src/main.zig b/src/main.zig
index c44b5e6..ec47f86 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -133,24 +133,33 @@ pub fn main() !void {
         if (isKeyPressed(.R)) player.ang += rotation;
         if (isKeyPressed(.T)) player.ang -= rotation;
 
+        const cos = std.math.cos(player.ang);
+        const sin = std.math.sin(player.ang);
+
         player.acc_x = 0;
         player.acc_y = 0;
-        const acc_mag = 50;
+        const acc_mag = 30;
         if (isKeyPressed(.Right)) {
-            player.acc_x += std.math.cos(player.ang - PI / 2.0) * acc_mag;
-            player.acc_y += std.math.sin(player.ang - PI / 2.0) * acc_mag;
+            player.acc_x += sin;
+            player.acc_y -= cos;
         }
         if (isKeyPressed(.Left)) {
-            player.acc_x -= std.math.cos(player.ang - PI / 2.0) * acc_mag;
-            player.acc_y -= std.math.sin(player.ang - PI / 2.0) * acc_mag;
+            player.acc_x -= sin;
+            player.acc_y += cos;
         }
         if (isKeyPressed(.Up) or isKeyPressed(.F)) {
-            player.acc_x += std.math.cos(player.ang) * acc_mag;
-            player.acc_y += std.math.sin(player.ang) * acc_mag;
+            player.acc_x += cos;
+            player.acc_y += sin;
         }
         if (isKeyPressed(.Down) or isKeyPressed(.S)) {
-            player.acc_x -= std.math.cos(player.ang) * acc_mag;
-            player.acc_y -= std.math.sin(player.ang) * acc_mag;
+            player.acc_x -= cos;
+            player.acc_y -= sin;
+        }
+        // normalise
+        const a = std.math.sqrt(player.acc_x * player.acc_x + player.acc_y * player.acc_y);
+        if (a > 0) {
+            player.acc_x *= acc_mag / a;
+            player.acc_y *= acc_mag / a;
         }
 
         // First the background
@@ -177,6 +186,6 @@ pub fn main() !void {
 
         window.display();
 
-        player.tick();
+        player.tick(map);
     }
 }
-- 
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