wow, I created ground and fire

src/game/DinamicObject.h

@@ -0,0 +1,51 @@
+#include "GameObject.h"
+#include <map>
+#include <string>
+#include <vector>
+#include <sys/time.h>
+#include <ctime>
+
+using namespace std;
+
+struct LastFrame
+{
+    string frameName;
+    int frameIndex;
+};
+
+class DinamicObject: public GameObject
+{
+    public:
+        DinamicObject(int x, int y, int w, int h, map<string, vector<SDL_Rect>> animations, int animationFps = 30): GameObject(x, y, w, h)
+        {
+            this->animations = animations;
+            this->frameLenth = 1000/animationFps;
+            this->lastFrameTime = -1;
+            this->lastFrame = {"", 0};
+        }
+        Frame frame()
+        {
+            time_t currentTime;
+            {
+                struct timeval timeNow{};
+                gettimeofday(&timeNow, nullptr);
+                currentTime = (timeNow.tv_sec * 1000) + (timeNow.tv_usec / 1000);
+            }
+
+            if (this->lastFrameTime == -1)
+                this->lastFrameTime = currentTime;
+            
+            int currentFrameIndex = ((this->lastFrame).frameIndex + (currentTime - this->lastFrameTime)/this->frameLenth) % (this->animations)[(this->lastFrame).frameName].size();
+        
+            this->lastFrameTime += (currentFrameIndex - (this->lastFrame).frameIndex) * this->frameLenth;
+            (this->lastFrame).frameIndex = currentFrameIndex;
+
+            return Frame(this->dstrect, animations[(this->lastFrame).frameName][currentFrameIndex]);
+        }
+
+    protected:
+        map<string, vector<SDL_Rect>> animations;
+        int frameLenth;
+        time_t lastFrameTime;
+        LastFrame lastFrame;
+};