--- /dev/null
+#ifndef RAY_TRACING_COMMON
+#define RAY_TRACING_COMMON
+
+#define NB_SPHERES 2000
+
+
+#define MEMORY_MODEL_GLOBAL 1
+#define MEMORY_MODEL_CONSTANT 2
+#define MEMORY_MODEL_SHARED 3
+
+#define CURRENT_MEMORY_MODEL MEMORY_MODEL_CONSTANT
+
+#endif