library-ized ticks

1 files changed, 50 insertions, 0 deletions

diff --git a/src/gametime.cpp b/src/gametime.cpp
new file mode 100644
index 0000000..be63885
--- /dev/null
+++ b/src/gametime.cpp
@@ -0,0 +1,50 @@
+#include <gametime.hpp>
+
+#include <common.hpp>
+
+static unsigned int tickCount = 0;
+static unsigned int deltaTime = 1;
+
+// millisecond timers
+static unsigned int currentTime = 0;
+static unsigned int prevTime, prevPrevTime;
+
+namespace gtime {
+    void setTickCount(unsigned int t) {
+        tickCount = t;
+    }
+
+    unsigned int getTickCount(void) {
+        return tickCount;
+    }
+
+    unsigned int getDeltaTime(void) {
+        return deltaTime;
+    }
+
+    void tick(void) {
+        tickCount++;
+    }
+
+    void tick(unsigned int ticks) {
+        tickCount += ticks;
+    }
+
+    void mainLoopHandler(void) {
+    	if (!currentTime)
+    		currentTime = prevTime = millis();
+
+    	currentTime = millis();
+    	deltaTime	= currentTime - prevTime;
+    	prevTime	= currentTime;
+    }
+
+    bool tickHasPassed(void) {
+        if (prevPrevTime + MSEC_PER_TICK <= currentTime) {
+    		prevPrevTime = currentTime;
+            return true;
+    	}
+
+        return false;
+    }
+}