(mkosarek) Beginning to explain rigidbody physics in a reasonable way

1 files changed, 25 insertions, 0 deletions

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 };
+    }
+};