Why would these not be the same?

Solar2D General Questions/Discussion
#1

local triange = display.newPolygon(200,200,{100,100,100,0,0,0})

physics.addBody(triange,“static”,{shape = {100,100,100,0,0,0}})

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#2

One is in pixel space, one is in object space (the physics body) which is centered about 0.

I think the latter should be something like:

physics.addBody(triange,"static",{shape = { -50,-50, 50,-50, 50, 50} })
#3

Updated above, so double check if you just grabbed it.

#4

It’s a shame I can’t use the same shape

#5

It it what it is.  The body shape is an artifact of using Box 2D.  Also, it makes more sense that way, whereas the pixel dimensions of a polygon must be freeform.

Also, with some effort you could make a builder function to handle creating the body from the polygon shape information.

Corona SDK

#6

One is in pixel space, one is in object space (the physics body) which is centered about 0.

I think the latter should be something like:

physics.addBody(triange,"static",{shape = { -50,-50, 50,-50, 50, 50} })
#7

Updated above, so double check if you just grabbed it.

#8

It’s a shame I can’t use the same shape

#9

It it what it is.  The body shape is an artifact of using Box 2D.  Also, it makes more sense that way, whereas the pixel dimensions of a polygon must be freeform.

Also, with some effort you could make a builder function to handle creating the body from the polygon shape information.

Corona SDK