From e3fcd5fc180b48e0710fbcbf6cfa94e906b8219c Mon Sep 17 00:00:00 2001
From: Kelly Rauchenberger <fefferburbia@gmail.com>
Date: Sat, 30 Jan 2021 13:03:50 -0500
Subject: Abstracted frame timing stuff

---
 src/main.cpp | 20 +++++++-------------
 src/timer.h  | 28 ++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 13 deletions(-)
 create mode 100644 src/timer.h

(limited to 'src')

diff --git a/src/main.cpp b/src/main.cpp
index 1d3d58e..83f63e0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,6 +2,7 @@
 #include "renderer.h"
 #include "game.h"
 #include "party.h"
+#include "timer.h"
 
 void loop(Renderer& renderer) {
   Game game;
@@ -18,11 +19,8 @@ void loop(Renderer& renderer) {
 
   renderer.render(game);
 
-  size_t inputDt = 50;
-  size_t inputAcc = 0;
-
-  size_t animDt = 1000/5;//30fps * 1000 t/s;
-  size_t animAcc = 0;
+  Timer inputTimer(50);
+  Timer animTimer(1000/5);//30fps * 1000 t/s;
 
   size_t lastTime = SDL_GetTicks();
 
@@ -44,17 +42,13 @@ void loop(Renderer& renderer) {
     keystate.up = state[SDL_SCANCODE_UP];
     keystate.down = state[SDL_SCANCODE_DOWN];
 
-    inputAcc += frameTime;
-    while (inputAcc > inputDt) {
-      inputAcc -= inputDt;
-
+    inputTimer.accumulate(frameTime);
+    while (inputTimer.step()) {
       party.move(game, keystate);
     }
 
-    animAcc += frameTime;
-    while (animAcc > animDt) {
-      animAcc -= animDt;
-
+    animTimer.accumulate(frameTime);
+    while (animTimer.step()) {
       game.tickSpriteAnim();
     }
 
diff --git a/src/timer.h b/src/timer.h
new file mode 100644
index 0000000..0809610
--- /dev/null
+++ b/src/timer.h
@@ -0,0 +1,28 @@
+#ifndef TIMER_H_45E2F1F9
+#define TIMER_H_45E2F1F9
+
+class Timer {
+public:
+
+  Timer(int dt) : dt_(dt) {}
+
+  void accumulate(int t) {
+    acc_ += t;
+  }
+
+  bool step() {
+    if (acc_ > dt_) {
+      acc_ -= dt_;
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+private:
+
+  int dt_;
+  int acc_ = 0;
+};
+
+#endif /* end of include guard: TIMER_H_45E2F1F9 */
-- 
cgit 1.4.1