Initial commit

4 files changed, 133 insertions, 0 deletions

diff --git a/07-july/src/util/util.c b/07-july/src/util/util.c
new file mode 100644
index 0000000..fcdd665
--- /dev/null
+++ b/07-july/src/util/util.c
@@ -0,0 +1,49 @@
+#include "util.h"
+
+#include <SDL2/SDL.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+void Util_FatalError( const char* error )
+{
+    fprintf(stderr, "Fatal Error:\n%s", error);
+    SDL_Quit();
+    exit(1);
+}
+
+char* Util_LoadFile( const char* path )
+{
+	FILE* file = fopen( path, "r" );
+
+	if(file == NULL)
+    {
+        const char* temp = " could not be found\n";
+        size_t length = strlen(temp);
+        length += strlen(path);
+        char buffer[length];
+        strcpy(buffer, path);
+        strcat(buffer, temp);
+        Util_FatalError(buffer);
+    }
+
+	fseek( file, 0, SEEK_END );
+	size_t sizeOfFile = ftell( file );
+	fseek( file, 0, SEEK_SET );
+	char* file_data = (char*) malloc( sizeof(char)*sizeOfFile + 1 );
+	fread( file_data, sizeof(char), sizeOfFile, file );
+	file_data[sizeOfFile] = '\0';
+	fclose(file);
+	return file_data;
+}
+
+float Util_RandomF(float min, float max)
+{
+    return ( min + (float)rand() ) / ( (float)RAND_MAX / (max-min) );
+}
+
+int Util_RandomI(int min, int max)
+{
+    return ( rand()%(max-min) ) + min;
+}
diff --git a/07-july/src/util/util.h b/07-july/src/util/util.h
new file mode 100644
index 0000000..5f82f30
--- /dev/null
+++ b/07-july/src/util/util.h
@@ -0,0 +1,19 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#define toRadians(degrees) (degrees * 3.1415926 / 180.0f)
+#define toDegrees(radians) (radians * 180.0f / 3.1415926)
+
+#ifdef DEBUG
+#include <stdio.h>
+#define myAssert(expr) expr ? 1==1 : fprintf(stderr, "The expresion was not true\n")
+#else
+#define myAssert(expr)
+#endif // DEBUG
+
+extern void Util_FatalError( const char* error );
+extern char* Util_LoadFile( const char* path );
+extern float Util_RandomF(float min, float max);
+extern int Util_RandomI(int min, int max);
+
+#endif // UTIL_H
diff --git a/07-july/src/util/util_time.c b/07-july/src/util/util_time.c
new file mode 100644
index 0000000..b601379
--- /dev/null
+++ b/07-july/src/util/util_time.c
@@ -0,0 +1,52 @@
+#include "util_time.h"
+
+static struct
+{
+    float max_ticks_per_frame; //< cuantos ticks (tiempo demora) un frame
+    Uint32 counted_frames; //< cuantos frames han pasado
+    Uint32 start_ticks;    //< ticks al iniciar la iteracion del loop
+    Uint32 beg_ticks;      //< ticks desde el inicio del juego
+    Uint32 time_per_frame;
+} TIME = {
+    1000.0f / 60.0f,
+    0, 0, 0, 0
+};
+
+void Time_Init()
+{
+    TIME.beg_ticks = SDL_GetTicks();
+}
+
+void Time_Begin()
+{
+    TIME.start_ticks = SDL_GetTicks();
+}
+
+float Time_End()
+{
+    TIME.counted_frames += 1;
+    float FPS = TIME.counted_frames / ( (float)(SDL_GetTicks() - TIME.beg_ticks) / 1000.f );
+
+    float frameTicks = (float)(SDL_GetTicks() - TIME.start_ticks);
+    TIME.time_per_frame = frameTicks;
+    if(frameTicks < TIME.max_ticks_per_frame){
+        SDL_Delay( (Uint32)(TIME.max_ticks_per_frame - frameTicks) );
+    }
+
+    return FPS;
+}
+
+float Time_GetFrameTime()
+{
+    return (float)TIME.time_per_frame / 1000.0f;
+}
+
+void Time_SetMaxFramesPerSecond(Uint32 frames)
+{
+    TIME.max_ticks_per_frame = 1000.0f / (float)frames;
+}
+
+Uint32 Time_GetCountedFrames()
+{
+    return TIME.counted_frames;
+}
diff --git a/07-july/src/util/util_time.h b/07-july/src/util/util_time.h
new file mode 100644
index 0000000..3c3e470
--- /dev/null
+++ b/07-july/src/util/util_time.h
@@ -0,0 +1,13 @@
+#ifndef UTIL_TIME_H
+#define UTIL_TIME_H
+
+#include <SDL2/SDL.h>
+
+extern void Time_Init( void );
+extern void Time_Begin( void );
+extern float Time_End( void );
+extern void Time_SetMaxFramesPerSecond(Uint32 frames);
+extern float Time_GetFrameTime( void );
+extern Uint32 Time_GetCountedFrames( void );
+
+#endif // UTIL_TIME_H