Swift - how to fill a path (opaque path) -


i have path should have shape of isometric tile:

                let isometricpath = cgpathcreatemutable()                 cgpathmovetopoint(isometricpath, nil, 0, -(tilesize.height / 2))                 cgpathaddlinetopoint(isometricpath, nil, (tilesize.width / 2), 0)                 cgpathaddlinetopoint(isometricpath, nil, 0, (tilesize.height / 2))                 cgpathaddlinetopoint(isometricpath, nil, -(tilesize.width / 2), 0)                 cgpathclosesubpath(isometricpath)

and try make opaque path line of code:

let isometricpathref = isometricpath cgpathref

but if want check if cgpoint inside path this:

cgpathcontainspoint(isometricpathref, nil, locationinnode, true)

it detect point on path not inside.

how make possible?

thanks

your code correct should @ origins of scene. sure can see shape?

by default, scene’s origin placed in lower-left corner of view. so, default scene initialized height of 1024 , width of 768, has origin (0,0) in lower-left corner, , (1024,768) coordinate in upper-right corner. frame property holds (0,0)-(1024,768).

suppose have example using question code:

let tilesize = cgsizemake(150.0,150.0) // code: let isometricpath = cgpathcreatemutable() cgpathmovetopoint(isometricpath, nil, 0, -(tilesize.height / 2)) cgpathaddlinetopoint(isometricpath, nil, (tilesize.width / 2), 0) cgpathaddlinetopoint(isometricpath, nil, 0, (tilesize.height / 2)) cgpathaddlinetopoint(isometricpath, nil, -(tilesize.width / 2), 0) cgpathclosesubpath(isometricpath)

this path represent rhombus shape.

now if want draw shape can do:

let shape = skshapenode.init(path: isometricpath) shape.strokecolor = skcolor.yellowcolor() shape.fillcolor = skcolor.bluecolor() self.addchild(shape)

but nothing showed because scene origin start 0.0 , shape have negative values.

to show rhombus can change scene anchorpoint to:

 self.anchorpoint = cgpointmake(0.5,0.5)

this centers scene’s origin in middle of view (apple docs) , can see tile:

enter image description here

now suppose want know if point inside shape:

let locationinnode = cgpointmake(tilesize.width/15,tilesize.height/15) // point inside rhombus

i want show point debug:

let circle = skshapenode.init(circleofradius: 5) circle.strokecolor = skcolor.whitecolor() circle.fillcolor = skcolor.whitecolor() self.addchild(circle) circle.position = locationinnode

enter image description here

now can check if point inside rhombus:

let isometricpathref = isometricpath cgpathref print(cgpathcontainspoint(isometricpathref, nil, locationinnode, true))

output:

enter image description here


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