From a945de3218e3cf9593fa21bcc6d8af04de4443ef Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Thu, 22 Sep 2022 23:24:37 +0200
Subject: Added brothers jumping

---
 src/brothers.zig | 9 +++++++++
 src/utils.zig    | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/brothers.zig b/src/brothers.zig
index 6121841..c3bde96 100644
--- a/src/brothers.zig
+++ b/src/brothers.zig
@@ -28,6 +28,15 @@ pub const Brother = struct {
             self.x -= 1;
         if (gamepad.held.right and self.x <= utils.rightLimit[@enumToInt(self.side)] - brother_width)
             self.x += 1;
+        if (self.y < 160) { // jumping!
+            self.vy += utils.gravity;
+            self.y += self.vy * utils.frequency;
+            if (self.y > 160)
+                self.y = 160;
+        } else if (gamepad.pressed.up) {
+            self.vy = -200;
+            self.y += self.vy * utils.frequency;
+        }
     }
 };
 
diff --git a/src/utils.zig b/src/utils.zig
index 5fa40f9..bb9eb13 100644
--- a/src/utils.zig
+++ b/src/utils.zig
@@ -1,6 +1,7 @@
 //----- Physics ---------------------------------------------------------------
 pub const gravity: f64 = 9.807; // m/s²
-pub const scale: f64 = 1.0 / 30; // 30 pixels == 1m
+pub const scale: f64 = 1.0 / 30.0; // 30 pixels == 1m
+pub const frequency: f64 = 1.0 / 60.0; // 60 fps
 
 //----- Playground ------------------------------------------------------------
 pub const side = enum(u1) {
-- 
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