From aacfe27f72e7d7880c6478a3e006634fdd974300 Mon Sep 17 00:00:00 2001
From: Hannah <Hannah.dagemark@gmail.com>
Date: Sat, 31 Jan 2026 06:24:59 +0100
Subject: [PATCH] Added game file structure, game loop handler, game tickrate
 helper.

---
 .idea/misc.xml               |  8 ++++++++
 CMakeLists.txt               | 12 +++++++++++-
 src/engines/graphicsEngine.c |  3 +++
 src/engines/physicsEngine.c  |  3 +++
 src/helper/tickrateHelper.c  | 24 ++++++++++++++++++++++++
 src/helper/tickrateHelper.h  | 10 ++++++++++
 src/logic/engineHandler.c    | 11 +++++++++++
 src/logic/engineHandler.h    | 10 ++++++++++
 src/logic/gameLoop.c         | 31 +++++++++++++++++++++++++++++++
 src/logic/gameLoop.h         | 10 ++++++++++
 src/main.c                   |  8 ++++++++
 11 files changed, 129 insertions(+), 1 deletion(-)
 create mode 100644 src/engines/graphicsEngine.c
 create mode 100644 src/engines/physicsEngine.c
 create mode 100644 src/helper/tickrateHelper.c
 create mode 100644 src/helper/tickrateHelper.h
 create mode 100644 src/logic/engineHandler.c
 create mode 100644 src/logic/engineHandler.h
 create mode 100644 src/logic/gameLoop.c
 create mode 100644 src/logic/gameLoop.h

diff --git a/.idea/misc.xml b/.idea/misc.xml
index 0b76fe5..1f6bab5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -4,4 +4,12 @@
     <option name="pythonIntegrationState" value="YES" />
   </component>
   <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+  <component name="CidrRootsConfiguration">
+    <sourceRoots>
+      <file path="$PROJECT_DIR$/src" />
+    </sourceRoots>
+    <libraryRoots>
+      <file path="$PROJECT_DIR$/libs" />
+    </libraryRoots>
+  </component>
 </project>
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3c06e03..b1726d9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,2 +1,12 @@
-cmake_minimum_required(VERSION 4.2)
+cmake_minimum_required(VERSION 4.2.0)
 project(lifecrystal C)
+add_executable(main src/main.c
+        src/logic/engineHandler.c
+        src/logic/engineHandler.h
+        src/engines/physicsEngine.c
+        src/engines/graphicsEngine.c
+        src/helper/tickrateHelper.c
+        src/logic/gameLoop.c
+        src/logic/gameLoop.h
+        src/helper/tickrateHelper.h
+)
\ No newline at end of file
diff --git a/src/engines/graphicsEngine.c b/src/engines/graphicsEngine.c
new file mode 100644
index 0000000..64d1e14
--- /dev/null
+++ b/src/engines/graphicsEngine.c
@@ -0,0 +1,3 @@
+//
+// Created by Hannah on 31/01/2026.
+//
\ No newline at end of file
diff --git a/src/engines/physicsEngine.c b/src/engines/physicsEngine.c
new file mode 100644
index 0000000..198653a
--- /dev/null
+++ b/src/engines/physicsEngine.c
@@ -0,0 +1,3 @@
+//
+// Created by Hannah on 31/01/2026.
+//
diff --git a/src/helper/tickrateHelper.c b/src/helper/tickrateHelper.c
new file mode 100644
index 0000000..f89096d
--- /dev/null
+++ b/src/helper/tickrateHelper.c
@@ -0,0 +1,24 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+
+int delayTickrate(int ticksPerSecond, long int period) {
+    int requiredNanoseconds = 10e9/ticksPerSecond;
+    struct timeval currentTime;
+    gettimeofday(&currentTime, NULL);
+    printf("Nanoseconds: %ld\nCurrent:%ld\n", requiredNanoseconds,currentTime.tv_usec*1000 - period*1000);
+    if (currentTime.tv_usec*1000 - period*1000 < requiredNanoseconds) {
+        struct timespec remainingTime;
+        remainingTime.tv_sec = 0;
+        remainingTime.tv_nsec = requiredNanoseconds - (currentTime.tv_usec*1000 - period*1000);
+        printf("Sleeping for %dnano and %dsec with %f effective sec\n", remainingTime.tv_nsec, remainingTime.tv_sec, remainingTime.tv_nsec/10e9);
+        clock_nanosleep(CLOCK_MONOTONIC, 0, &remainingTime, NULL);
+        return 0;
+    }
+    printf("Can't delay, %d larger than required %d", currentTime.tv_usec*1000 - period*1000, requiredNanoseconds);
+    return 1;
+}
\ No newline at end of file
diff --git a/src/helper/tickrateHelper.h b/src/helper/tickrateHelper.h
new file mode 100644
index 0000000..f93b0de
--- /dev/null
+++ b/src/helper/tickrateHelper.h
@@ -0,0 +1,10 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#ifndef LIFECRYSTAL_TICKRATEHELPER_H
+#define LIFECRYSTAL_TICKRATEHELPER_H
+
+int delayTickrate(int tickrate, int period);
+
+#endif //LIFECRYSTAL_TICKRATEHELPER_H
\ No newline at end of file
diff --git a/src/logic/engineHandler.c b/src/logic/engineHandler.c
new file mode 100644
index 0000000..5d74a36
--- /dev/null
+++ b/src/logic/engineHandler.c
@@ -0,0 +1,11 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#include "engineHandler.h"
+
+#include <stdio.h>
+
+int engineHandlerCycle() {
+    printf("This is an engine handler cycle!\n");
+}
diff --git a/src/logic/engineHandler.h b/src/logic/engineHandler.h
new file mode 100644
index 0000000..51c91b8
--- /dev/null
+++ b/src/logic/engineHandler.h
@@ -0,0 +1,10 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#ifndef LIFECRYSTAL_ENGINEHANDLER_H
+#define LIFECRYSTAL_ENGINEHANDLER_H
+
+int engineHandlerCycle();
+
+#endif //LIFECRYSTAL_ENGINEHANDLER_H
\ No newline at end of file
diff --git a/src/logic/gameLoop.c b/src/logic/gameLoop.c
new file mode 100644
index 0000000..2bdcf6c
--- /dev/null
+++ b/src/logic/gameLoop.c
@@ -0,0 +1,31 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#include "gameLoop.h"
+#include <stdio.h>
+#include <sys/time.h>
+#include "../helper/tickrateHelper.h"
+
+struct timeval rateRegulator(struct timeval prevCycleTime, int ticksPerSecond) {
+    unsigned short int isBehindSchedule = delayTickrate(ticksPerSecond, prevCycleTime.tv_usec);
+    if (isBehindSchedule) {
+        printf("\nRunning behind schedule!\n");
+    }
+    struct timeval nextCycleTime;
+    gettimeofday(&nextCycleTime, NULL);
+    unsigned int deltaTime = nextCycleTime.tv_usec - prevCycleTime.tv_usec;
+    printf("Cycle took %u micros, %d millis, landing on %d tps\n", deltaTime, deltaTime/1000, (int) 10e6/deltaTime);
+    return nextCycleTime;
+}
+
+int mainGameLoop(int ticksPerSecond, int framesPerSecond) {
+    printf("Starting mainGameLoop at %dTPS,%dFPS", ticksPerSecond, framesPerSecond);
+    struct timeval prevCycleTime;
+    gettimeofday(&prevCycleTime, NULL);
+
+    while (true) {
+        prevCycleTime = rateRegulator(prevCycleTime, ticksPerSecond);
+    }
+}
+
diff --git a/src/logic/gameLoop.h b/src/logic/gameLoop.h
new file mode 100644
index 0000000..0da001b
--- /dev/null
+++ b/src/logic/gameLoop.h
@@ -0,0 +1,10 @@
+//
+// Created by Hannah on 31/01/2026.
+//
+
+#ifndef LIFECRYSTAL_GAMELOOP_H
+#define LIFECRYSTAL_GAMELOOP_H
+
+int mainGameLoop(int ticksPerSecond, int framesPerSecond);
+
+#endif //LIFECRYSTAL_GAMELOOP_H
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index 8b13789..6411dc0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1 +1,9 @@
+#include <stdio.h>
+#include "logic/engineHandler.h"
+#include "logic/gameLoop.h"
 
+int main() {
+    printf("Hello World!\n");
+    engineHandlerCycle();
+    mainGameLoop(120,120);
+}