Ocean Currents and wind forces

silent marshal · 03-07-12, 05:14 AM

In preparation to a new navigation mod (working title: ***8222;pretty new navigation mod***8220

I wonder how SH5 deals with unattached dynamics like wind force and ocean currents.

I don***8217;t expect that SH5 has implemented currents or wind drifts, I think I***8216;ve never noticed this before (but I will make some tests tonight). So this leads me to some questions:

Q1) is it possible to slew an object (eg.u-boat; speed = 0!), whether on surface or submerged, with a predefined force-vector (direction and quantity)? If yes...

Now the ideas:

Step 1) implement wind drift (simple mode: force is independent from the exposed surface of the boat)
Step 2) implement ocean current (no tidal current at this stage):
Step 2a) surface and subsurface current (increasing constantly with depth); create ocean current maps (mip-mapping?) for gameplay; for calcualtion purpose the map will be divided into square-zones and each zone has it***8217;s specific current vector. But keep it simple!
Step 3) implement tidal current

The currents at the bottom of the ocean should be zero because otherwise an enduring creak***8217;n***8217;squeak would get on our nerves. This should be also true at harbors.

Facing some problems:
P1) boats speed = 0, heading 360°, wind from 270°at 5 kt; surface current = 0: the boats heading should remain constantly at 360°but it***8216;s position changes (with a reduction factor for the wind speed, of course).
P2) boats speed = 2 kt, heading 360, depth = 30m, wind = 0 (doesn***8217;t matter at all); subsurface current = 7kt from 360°: the boat should remain 360° but should be pulled back with less than 5kt with engines running forward .

This should be enough for this time. I read some threads for SH3 but haven***8217;t found some for SH5.

Would be very pleased if you tell me what you found out yet.

03-07-12, 05:14 AM	#1
silent marshal Watch Join Date: Aug 2008 Location: Vienna - Austria Posts: 25 Downloads: 89 Uploads: 0	Ocean Currents and wind forces In preparation to a new navigation mod (working title: *8222;pretty new navigation mod8220 I wonder how SH5 deals with unattached dynamics like wind force and ocean currents. I don8217;t expect that SH5 has implemented currents or wind drifts, I think I8216;ve never noticed this before (but I will make some tests tonight). So this leads me to some questions: Q1) is it possible to slew an object (eg.u-boat; speed = 0!), whether on surface or submerged, with a predefined force-vector (direction and quantity)? If yes... Now the ideas: Step 1) implement wind drift (simple mode: force is independent from the exposed surface of the boat) Step 2) implement ocean current (no tidal current at this stage): Step 2a) surface and subsurface current (increasing constantly with depth); create ocean current maps (mip-mapping?) for gameplay; for calcualtion purpose the map will be divided into square-zones and each zone has it8217;s specific current vector. But keep it simple! Step 3) implement tidal current The currents at the bottom of the ocean should be zero because otherwise an enduring creak8217;n8217;squeak would get on our nerves. This should be also true at harbors. Facing some problems: P1) boats speed = 0, heading 360°, wind from 270°at 5 kt; surface current = 0: the boats heading should remain constantly at 360°but it8216;s position changes (with a reduction factor for the wind speed, of course). P2) boats speed = 2 kt, heading 360, depth = 30m, wind = 0 (doesn8217;t matter at all); subsurface current = 7kt from 360°: the boat should remain 360° but should be pulled back with less than 5kt with engines running forward . This should be enough for this time. I read some threads for SH3 but haven8217;t found some for SH5. Would be very pleased if you tell me what you found out yet. Last edited by silent marshal; 03-08-12 at 05:11 AM.*