Changes between Initial Version and Version 1 of code/howto/Tickable

Timestamp:

Oct 10, 2008, 3:36:18 AM (16 years ago)

Author:

landauf

Comment:

—

code/howto/Tickable

@@ +1 @@
+= HowTo: Tickable =
+
+A tick is one frame or one iteration of the main-loop. Classes can be called every tick. This is achieved by inheriting from [wiki:Tickable] and implementing the {{{virtual void tick(float dt)}}} function. ''dt'' is the time '''in seconds''' passed since the last tick.
+
+*.h file:
+{{{
+#include "objects/Tickable.h"
+
+class MyClass : public Tickable
+{
+    public:
+        virtual void tick(float dt);
+
+    private:
+        Vector3 position_;
+};
+}}}
+
+*.cc file:
+{{{
+void MyClass::tick(float dt)
+{
+    // let the object move with 100 units per second in positive x direction:
+    Vector3 velocity(100, 0, 0);
+    this->position_ += velocity * dt;
+
+    // call tick(dt) of the parent class:
+    SUPER(MyClass, tick, dt);
+}
+}}}
+
+(See [wiki:howto/Super this] for more information about the SUPER macro.)