FindAliens (Harvest)

From OxeyeWiki

getNumBuildings()
Finds all buildings.
Parameter	Expected Type	Description
Returns
Returns an array of all buildings.

getNumBuildings(type)
Finds all buildings of a certain type, such as "SPARKPRODUCER" (Solar Plants).
Parameter	Expected Type	Description
type	String	The building identifier name used for selection.
Returns
Returns an array of all buildings of a cretin identifier name.

getNumBuildings(x, y, radius)
Finds all buildings in a circle.
Parameter	Expected Type	Description
x	Number	The x coordinate of a point on the world map.
y	Number	The y coordinate of a point on the world map.
radius	Number	The radius to be used.
Returns
Returns an array of all buildings in an certain radius.

getNumBuildings(x, y, radius, type)
Finds all buildings of a certain type in a circle.
Parameter	Expected Type	Description
x	Number	The x coordinate of a point on the world map.
y	Number	The y coordinate of a point on the world map.
radius	Number	The radius to be used.
type	String	The building identifier name used for selection.
Returns
Returns an array of all buildings in an certain radius with a certain type.

getNumBuildings(left, top, right, bottom, type)
Finds all buildings of a certain type in a rectangle.
Parameter	Expected Type	Description
left	Number	The left coordinate of the rectangle.
top	Number	The top coordinate of the rectangle.
right	Number	The right coordinate of the rectangle.
bottom	Number	The bottom coordinate of the rectangle.
type	String	The building identifier name used for selection.
Returns
Returns an array of all buildings in an certain rectangle with a certain type.

Description

All of the functions above will return an array (which can be empty) of buildings. The buildings will be of user data lua type, and refer to a CBuildingLuaInfo in Harvest's C++ code. On these objects you can perform getPosition(), getId() and various other functions (see separate thread soon). However, you may not keep a reference to these objects since it's not possible to predict when a building is destroyed. Instead, if you need to keep track of a specific building, you will have to save it's ID number and then locate it each frame with harvest.getBuilding(id).

Example

-- destroy all buildings in the circle!
buildings = harvest.findBuildings(x, y, 200)
for i=1,#buildings do
   local x,y = buildings[i]:getPosition()
   harvest.spawnParticle(buildings[i]:getDeathParticle(), x, y)
   buildings[i]:remove()
end

Resources

• Oxeye Game Studio Forum - Harvest Functions