From 2ab6b6cfe81505b029f2da397cef0bb58989444f Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Thu, 17 Jun 2021 21:32:57 -0400
Subject: (mkosarek) Beginning to explain rigidbody physics in a reasonable way

---
 2d/rigidbody/rigidbody_1/snippet2.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 2d/rigidbody/rigidbody_1/snippet2.cpp

(limited to '2d/rigidbody/rigidbody_1/snippet2.cpp')

diff --git a/2d/rigidbody/rigidbody_1/snippet2.cpp b/2d/rigidbody/rigidbody_1/snippet2.cpp
new file mode 100644
index 0000000..8ad468c
--- /dev/null
+++ b/2d/rigidbody/rigidbody_1/snippet2.cpp
@@ -0,0 +1,25 @@
+
+
+struct Rigidbody {
+    Vector2 force = { 0, 0 };
+    Vector2 velocity = { 0, 0 };
+    Vector2 position = { 0, 0 };
+    float32 mass = 1.f;
+
+    void applyForce(Vector2 f) {
+        force += f;
+    }
+
+    void applyGravity(float32 deltaTimeSeconds) {
+        velocity += (Vector2 { 0.f, -50.f } * deltaTimeSeconds);
+    }
+
+    void update(float32 deltaTimeSeconds) {
+        applyGravity(deltaTimeSeconds);
+        
+        Vector2 acceleration = force / mass;
+        velocity += (acceleration * deltaTimeSeconds);
+        position += (velocity * deltaTimeSeconds);
+        force = Vector2 { 0.f, 0.f };
+    }
+};
-- 
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