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defun( _Create_Thermal ( od, id, spoke, n, ang)
prog(( PI, r, x, y, arc, slice, a, b, c, p)
PI = 3.141593
axlDBControl('activeLayer "etch/top")
r = ( od + id)/4, x = ( od - id)/4 + spoke/2, y = sqrt( r*r - x*x )
spoke = asin( x/r)*2, slice = 2*PI/n, arc = slice - spoke
a = -x:y, b = _CTRotatePt( a, arc)
if( ang != 0 then ang = ang*PI/180.0, a = _CTRotatePt( a, ang), b = _CTRotatePt( b, ang))
for( i 1 n
c = caar( axlDBCreatePath( axlPathArcCenter( axlPathStart( list( a)), ( od - id)/2, b, nil, 0:0)))
p = axlPolyFromDB( c ?endCapType 'ROUND)
axlDeleteObject( c)
axlDBCreateShape( car( p) t)
a = _CTRotatePt( a, slice), b = _CTRotatePt( b, slice)
);end-for
);end-prog
);end-defun
QUOTE:
defun( _CTRotatePt ( pt, ang)
prog(( x, y, nx, ny)
x = car( pt)
y = cadr( pt)
nx = x*cos( ang) - y*sin( ang)
ny = x*sin( ang) + y*cos( ang)
return( nx:ny)
);end-prog
);end-defun
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