diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..2d96ee8
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,42 @@
+##
+## EPITECH PROJECT, 2019
+## quadtree
+## File description:
+## Makefile
+##
+
+SRC = src/quadtree.c \
+	src/qt_split.c \
+	src/utility/calloc.c
+
+OBJ = $(SRC:%.c=%.o)
+
+INCLUDE = -I ./include
+
+CFLAGS = $(INCLUDE) -Wall -Wextra -Wshadow
+
+LDFLAGS = 
+
+NAME = libquadtree.a
+
+CC = gcc
+
+AR = ar rc
+
+all: build
+
+build: $(OBJ)
+	$(AR) $(NAME) $(OBJ)
+
+clean:
+	$(RM) $(OBJ)
+
+fclean: clean
+	$(RM) $(NAME)
+
+re: fclean all
+
+dbg: CFLAGS += -g
+dbg: re
+
+.PHONY: all build clean fclean
\ No newline at end of file
diff --git a/include/quadtree.h b/include/quadtree.h
new file mode 100644
index 0000000..f0c702d
--- /dev/null
+++ b/include/quadtree.h
@@ -0,0 +1,38 @@
+/*
+** EPITECH PROJECT, 2019
+** quadtree
+** File description:
+** quadtree
+*/
+
+#pragma once
+
+#include <stdbool.h>
+
+typedef struct quadtree quadtree;
+
+typedef struct qt_intrect
+{
+    int x;
+    int y;
+    int h;
+    int w;
+} qt_intrect;
+
+typedef struct qt_object
+{
+    int id;
+    qt_intrect rect;
+} qt_object;
+
+struct quadtree
+{
+    qt_intrect rect;
+    int capacity;
+    void **objects;
+};
+
+int qt_add(quadtree *tree, qt_object *obj);
+bool qt_collide(qt_intrect r1, qt_intrect r2);
+qt_object *qt_getobj(quadtree *tree, int id);
+int qt_update(quadtree *tree, qt_object *obj);
\ No newline at end of file
diff --git a/include/quadtree_internal.h b/include/quadtree_internal.h
new file mode 100644
index 0000000..7cc49be
--- /dev/null
+++ b/include/quadtree_internal.h
@@ -0,0 +1,12 @@
+/*
+** EPITECH PROJECT, 2019
+** quadtree
+** File description:
+** quadtree_internal
+*/
+
+#pragma once
+
+void *my_calloc(int capacity, int size);
+
+quadtree **qt_split(quadtree *tree);
\ No newline at end of file
diff --git a/src/qt_split.c b/src/qt_split.c
new file mode 100644
index 0000000..122c5cc
--- /dev/null
+++ b/src/qt_split.c
@@ -0,0 +1,44 @@
+/*
+** EPITECH PROJECT, 2019
+** quadtree
+** File description:
+** qt_split
+*/
+
+#include "quadtree.h"
+#include "quadtree_internal.h"
+#include <stdlib.h>
+
+qt_object **qt_filter_objects(quadtree *tree, qt_intrect rect)
+{
+    qt_object **objs = my_calloc(tree->capacity, sizeof(qt_object *));
+    int len = 0;
+
+    for (int i = 0; tree->objects[i]; i++) {
+        if (qt_collide(((qt_object *)tree->objects[i])->rect, rect))
+            objs[len++] = (qt_object *)tree->objects[i];
+    }
+    return (objs);
+}
+
+quadtree **qt_split(quadtree *tree)
+{
+    quadtree **ret = malloc(sizeof(quadtree *) * 4);
+
+    if (!ret)
+        return (NULL);
+    for (int i = 0; i < 4; i++) {
+        ret[i] = malloc(sizeof(quadtree));
+        if (!ret[i])
+            return (NULL);
+        ret[i]->capacity = tree->capacity;
+        ret[i]->rect.h = tree->rect.h / 2;
+        ret[i]->rect.w = tree->rect.w / 2;
+        ret[i]->rect.x = !(i % 2) ? tree->rect.x : tree->rect.x + tree->rect.w;
+        ret[i]->rect.y = !(i > 1) ? tree->rect.y : tree->rect.y + tree->rect.h;
+        ret[i]->objects = (void **)qt_filter_objects(tree, ret[i]->rect);
+    }
+    tree->capacity = -1;
+    tree->objects = (void **)ret;
+    return (ret);
+}
\ No newline at end of file
diff --git a/src/quadtree.c b/src/quadtree.c
new file mode 100644
index 0000000..d104378
--- /dev/null
+++ b/src/quadtree.c
@@ -0,0 +1,84 @@
+/*
+** EPITECH PROJECT, 2019
+** quadtree
+** File description:
+** quadtree
+*/
+
+#include "quadtree.h"
+#include "quadtree_internal.h"
+#include <stdlib.h>
+#include <stdbool.h>
+
+quadtree *qt_create(qt_intrect rect, int capacity)
+{
+    quadtree *tree = malloc(sizeof(quadtree));
+
+    if (!tree)
+        return (NULL);
+    tree->rect = rect;
+    tree->capacity = capacity;
+    tree->objects = my_calloc(capacity, sizeof(*tree->objects));
+    if (!tree->objects) {
+        free(tree);
+        return (NULL);
+    }
+    return (tree);
+}
+
+bool qt_collide(qt_intrect r1, qt_intrect r2)
+{
+    if (r1.x + r1.w < r2.x || r2.x + r2.w < r1.x)
+        return (false);
+    if (r1.y + r1.h < r2.y || r2.y + r2.h < r1.y)
+        return (false);
+    return (true);
+}
+
+int qt_add(quadtree *tree, qt_object *obj)
+{
+    int i = 0;
+
+    if (tree->capacity > 0) {
+        while (tree->objects[i++]);
+        if (i < tree->capacity)
+            tree->objects[i] = obj;
+        else
+            qt_split(tree);
+        return (0);
+    }
+    for (i = 0; i < 4; i++) {
+        if (qt_collide(((qt_object *)tree->objects[i])->rect, obj->rect))
+            qt_add((quadtree *)tree->objects[i], obj);
+    }
+    return (0);
+}
+
+qt_object *qt_getobj(quadtree *tree, int id)
+{
+    qt_object *obj;
+
+    if (tree->capacity == -1) {
+        for (int i = 0; i < 4; i++) {
+            obj = qt_getobj(tree->objects[i], id);
+            if (obj)
+                return (obj);
+        }
+        return (NULL);
+    }
+    for (int i = 0; tree->objects[i]; i++) {
+        if (((qt_object *)tree->objects[i])->id == id)
+            return ((qt_object *)tree->objects[i]);
+    }
+    return (NULL);
+}
+
+int qt_update(quadtree *tree, qt_object *obj)
+{
+    qt_object *o = qt_getobj(tree, obj->id);
+
+    if (!o)
+        return (-1);
+    *o = *obj;
+    return (0);
+}
\ No newline at end of file
diff --git a/src/utility/calloc.c b/src/utility/calloc.c
new file mode 100644
index 0000000..e0ef09d
--- /dev/null
+++ b/src/utility/calloc.c
@@ -0,0 +1,19 @@
+/*
+** EPITECH PROJECT, 2019
+** quadtree
+** File description:
+** calloc
+*/
+
+#include <stdlib.h>
+#include <string.h>
+
+void *my_calloc(int capacity, int size)
+{
+    void *alloc = malloc(capacity * size);
+
+    if (!alloc)
+        return (NULL);
+    memset(alloc, 0, capacity * size);
+    return (alloc);
+}
\ No newline at end of file