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Linking and subtracting regions
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ofc its possible what shape do u need?
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- Sep 20, 2010
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Sadly=( I need this for few triggers, one of them (simplier one) - mobs respawn. There are the forest around the town and there are a few type of animals here. Trigger is simple (sorry, I don't know how to use trigger-posting here):
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A unit dies
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If unit-type of dying unit = wolf (one of them exactly)
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wait n seconds
create 1 wolf at random point of REGION
But this way they will spawn only at one side of the forest (or if ill extend region - in town to). Ony one solution i found is to make different unit types with same characteristics and different editor suffixes, and spawn each one in different regions or check for a random percentage, but it's too boring to realize=(
Same for item/unit random spawns
gorillabull, standart square of big size with hole in it's center and linked chain of regions
-----------
A unit dies
-----------
If unit-type of dying unit = wolf (one of them exactly)
-----------
wait n seconds
create 1 wolf at random point of REGION
But this way they will spawn only at one side of the forest (or if ill extend region - in town to). Ony one solution i found is to make different unit types with same characteristics and different editor suffixes, and spawn each one in different regions or check for a random percentage, but it's too boring to realize=(
Same for item/unit random spawns
gorillabull, standart square of big size with hole in it's center and linked chain of regions
Last edited by a moderator:
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- Jul 17, 2011
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in your case since you need a circle or a hole you can do it like this:
first define a point which will be the center of your circle, then define a radius after that
whenever you need to check if a unit is in our out of the circle use this formula
if (x of your unit - x of circle)^2 + (y of your unit - y of circle)^2 < circle radius ^ 2 then your unit is inside the circular rect..
regions are nothing more than distance from point numbers even if you do them in gui
first define a point which will be the center of your circle, then define a radius after that
whenever you need to check if a unit is in our out of the circle use this formula
if (x of your unit - x of circle)^2 + (y of your unit - y of circle)^2 < circle radius ^ 2 then your unit is inside the circular rect..
regions are nothing more than distance from point numbers even if you do them in gui
Dr Super Good
Spell Reviewer
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Regions are made of cells representing the smallest managed area of the map playfield. Be aware that regions in WC3 have basic functionality (events and a few other things only) so do not expect to do much with them.
It is entirly possible to detect when a unit enters a circil-ish area of the playfield using regions. It is not possible to test if a location is inside a region.
It is entirly possible to detect when a unit enters a circil-ish area of the playfield using regions. It is not possible to test if a location is inside a region.
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Dr Super Good
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Well I be, I guess it is then.
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There is not a native function for getting a random location within a region though. So you may have some fun finding a suitable algorithm. You will probably store the added rects/cells in an own structure in order to keep track of them.
Dr Super Good
Spell Reviewer
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This is a problem that even plagued StarCraft II and its developers many years after WarCraft III. How does one get a fair random point from a collection of odd shapes efficiently?
The StarCraft II approach is to get a random point in the smallest square that contains the entire region and then checking if it is in the region. This process repeats until such a point is found or a number of tries is exceeded and null is returned instead.
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Wc3 regions consist of square cells though. You may likewise slice your odd curves up into cells with a fair approximation. The brute force way would be to number your cells and randomize one.
Dr Super Good
Spell Reviewer
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You would then need to do a sub-cell randomization for truely random point.
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