Guide to the ETW map

[PietroMicca]

Spoiler Alert, click show to read: 

This is a picture of sea_grids in India. I have add area ID for each quad.

There's a correlation between those areas called sea_grid_connections. Each connection has a float value. But I cannot understand how is calculated.

96 97 0
96 98 0
96 99 0
96 100 68,83662
96 101 158,64238
96 102 158,64238
96 103 158,64238
96 104 68,83662
97 98 0
97 99 0
97 100 101,38612
97 101 98,78085
97 102 98,78085
97 103 98,78085
97 104 101,38612
98 99 0
98 100 173,37563
98 101 51,003685
98 102 51,003685
98 103 51,003685
98 104 173,37563
99 100 217,25636
99 101 69,12314
99 102 69,12314
99 103 69,12314
99 104 217,25636
100 101 272,01038
100 102 272,01038
100 103 272,01038
100 104 0
101 102 0
101 103 0
101 104 162,42484
102 103 0
102 104 266,19022
103 104 329,888

I have always thought that this value could be distance between areas. This was confirmed by some example. Distance between 96 and 97 is 0, but why connection between 96 and 100 is 68,83662?

Any idea?

[uanime5]

For 96, 97, 98, and 99 their 100 and 104 floats have the same values, as do their 101, 102, and 103 floats. So it's possible that 100 and 104 are one group (West India), while 101-103 are another group (East India). If 96, 97, 98, and 99 are a third group (South India) then a float of 0 would mean that you're travelling between different quads in the same group. A float above 0 would be the distance you have to travel from one group to another group.

[PietroMicca]

ok another chapter now

wind maps

I have take a look to raw data about wind maps.

I can state there are 2 maps for each theatre (as climate maps). One is mainly composed by negative values and one mainly composed by positive values (many times specular to negative values).

Round of speculations please.

[uanime5]

Could one wind map be fore the battle map and another for the strat map? I'm guessing the mostly negative one will be for the strat map.

[PietroMicca]

Could one wind map be fore the battle map and another for the strat map? I'm guessing the mostly negative one will be for the strat map.

It would be strange. I supposed more likely something like min/max speed. Anyway is still under investigation. I do not think it could be a different meaning between values in these 2 maps, because values seem to come from the same scale of values. Range of values is -127, 127. A greyscale maybe.

[PietroMicca]

stupid hypothesis

a land wind map
and
a sea wind map

as for climate

[uanime5]

That would make sense as the wind has less effect on land battles than sea battles.

Most likely the negative wind map is the land one, as the negative values reduce the speed of bullets and change their direction. The positive wind map is the sea one, as the positive values represent the direction the wind blows the boats.

[PietroMicca]

I have also another theory. Taking a look to wind tables in DB I have seen that there's a magnitude X and magnitude Y for each wind. So there are 2 wind maps: one for magnitude X and one for magnitude Y. There are positive and negative values for both maps. So what does it mean? A negative values in X map indicates simply that wind goes in western direction, negatives in Y southern. So wind maps according to this hypothesis contain at the same time speed and direction information.

[PietroMicca]

taw and me we have realize a colored version of wind maps. As I have said there 2 wind maps for each theatre. So now we need to know meaning of these maps. What measure they use? We know where are present lower and higher values, but not their measure. I have attached all wind maps also from Napoleon. Scale of colors is this from lower to higher values:green, yellow, white, orange, red, violet, blue.

[wangrin]

Excellent job.

The "magnitude X and magnitude Y" make sense.
Do you think you could represent these coordinates as vectors ?

Do you have winter and summer windmap ?

[PietroMicca]

Excellent job.

The "magnitude X and magnitude Y" make sense.

It makes sense, but it's in contrast with taw's memory. taw's remembers that wind direction in campaign naval battle is random.

Do you think you could represent these coordinates as vectors ?

I may represent as resultant vectors, but those are not coordinates. Just a scale of values. We don't know its meaning. And now without some more evidence it's quite useless doing this work.

Do you have winter and summer windmap ?

There are 2 wind maps also in Napoleon. But in Napoleon there are 4 seasons.

[uanime5]

Excellent job.

The "magnitude X and magnitude Y" make sense.
Do you think you could represent these coordinates as vectors ?

Do you have winter and summer windmap ?

In the DB table 'wind_levels' the types of wind are described as westerly or northern so it's likely that the maps are for winds going north to south and west to east.

[PietroMicca]

In the DB table 'wind_levels' the types of wind are described as westerly or northern so it's likely that the maps are for winds going north to south and west to east.

There's also indicated magnitude X and Y of those wind levels. But those winds are for single or multiplayer battles. This table was a source of inspiration for me. I don't know if campaign map uses something like that.

I was testing this theory. At the beginning of the campaign there's a British Fleet in the English Channel. I moved this navy towards a French Navy off the coast of Brittany. I have done it several times. Wind is always North_East on the compass.

Now you can help me doing the same or better doing the contrary. Move the French Navy towards British ships and take a look at the compass. If in the same location in a naval battle there's always the same wind direction, my theory is righty. Otherwise it's wrong.

[uanime5]

I tested it as well and the wind was always blowing North East. Whether I was Britain or France, or it was during summer or winter didn't effect this.

[PietroMicca]

I tested it as well and the wind was always blowing North East. Whether I was Britain or France, or it was during summer or winter didn't effect this.

Good news. So now we need some test in some other part of map. But I don't think we will have significant difference.

fingers crossed ... we should be on the right track

Meanwhile I will found some more evidence in raw data. I will try to draw a sort of direction map.

[Taraphir]

In my opinion all individuals working on campaign map research for Empire Total War are Total War Center Community heroes.
Their findings are also important for Napoleon and Shogun 2.

[Flikitos]

May be it is the source why we could not use the new slots created on the campaign map?

Anyway well done.

[PietroMicca]

My test on wind maps were successful. I have attached a file where I have inverted completely direction of wind in Ivory Coast. Try to fight a naval battle with Portuguese Navy against Pirate ships in vanilla version. Direction of Wind is North. In my version take a look at the compass: direction is South.

So my theory is confirmed. Wind maps contain magnitude X and magnitude Y.

Now I can suggest taw how to develop some tool.

But there's a mystery about wind maps not solved yet. Each wind map has a float. I supposed that this float was a sort of speed coefficient. I have changed meaningfully this value, but this apparently doesn't affect wind in any way. There is a constant for each theater. What is used for?

[Port]

The direction of the wind - a constant? or changing?

[PietroMicca]

The direction of the wind - a constant? or changing?

Direction of wind is always the same. It's defined in wind maps.