initial commit

event_camera_simulator/esim_msgs/msg/OpticFlow.msg

@@ -0,0 +1,11 @@
+# This message contains an optic flow map
+# (0, 0) is at top-left corner of image
+# The optic flow x and y components are expressed in px/s and encoded with floating point accuracy.
+# The memory layout of the data is row-major.
+
+Header header
+uint32 height
+uint32 width
+
+float32[] flow_x
+float32[] flow_y