minor changes

src/components/hologram.c

@@ -1,6 +1,13 @@
 #include "hologram.h"
 
-void nn_hologram_clear() {
+// safety:
+// For valid indexes to be valid,
+// stuff must be from 0 to limit - 1
+nn_size_t nn_positionToIndex(nn_hologram *h, unsigned x, unsigned y, unsigned z) {
+	return x + y * h->width_x + z * h->width_x * h->height;
+}
+
+void nn_hologram_clear(nn_hologram *h) {
 	
 }