Specifically, what I'm looking for is how to address the arrival of new tech that requires infrastructure. For example, if I research Drektopian Cloning Machines, and they help pop growth, should you automatically get them everywhere? Should you only get it on places with a particular amount of infrastructure? Should this have any effect?
So you mean, if we get advanced farming tech, how do we decide which planets to upgrade when.
we have 2 farming planets. Both using farm tech level 1. Planet 1 is fully developed, i.e. it has maxed out its level 1 farms. Planet 2 is only halfway there, and is still building infrastructure.
If we gain farm tech level 2, its easy enough to decide that we start to upgrade planet 1 immediately. But what about planet 2? Do we stop building farm1, and upgrade the existing farm1 to farm2, or do we continue building farm1 until we are at max capacity, and only then upgrade to farm level 2.
There is an easy way to deal with this. Make new infrastructure techs simply increase the upper limit of infrastructure which can be built.
e.g. a planet can at tech 1 can build 1 point of infrastructure per unit population working in that focus. i.e. the infrastructure factor is 1.0 in that focus. Tech 2 increases this to, say 1.5.
So planet 1 has 100 points of farm infrastructure, planet 2 has 50 points, and the max limit of each planet is 100 points. We gain tech 2, which gives a 50% farming bonus. So we just increase the farming infrastructure limit of each planet to 150 points. Planet 1 can now build a further 50 points of farms before it maxes out, and planet 2 now has 100 points to go. There is no 'upgrade' to perform, infrastructure just continues to increase as normal.
Note that you would probably have to increase the number of farms that each population unit can work by this factor as well, otherwise all you gain for your new tech is 50 farms with no-one working on them.
Also bear in mind that this technique means that any increase in a planets max population will automatically require extra infrastructure to be built to house it. This may or may not be a good thing, depending on where you want to go with things like overcrowding, unemployment etc.
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