diff options
Diffstat (limited to 'Master/texmf-dist/metapost/luamesh/luamesh.mp')
-rw-r--r-- | Master/texmf-dist/metapost/luamesh/luamesh.mp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Master/texmf-dist/metapost/luamesh/luamesh.mp b/Master/texmf-dist/metapost/luamesh/luamesh.mp new file mode 100644 index 00000000000..4e6d3e09e23 --- /dev/null +++ b/Master/texmf-dist/metapost/luamesh/luamesh.mp @@ -0,0 +1,22 @@ +% metapost library for the lualatex package luamesh +% +vardef circumcircle(expr M,N,P)= + % Compute center and radius of the circoncircle of the triangle M N P + save a,b,c,circle,rad,center,x,y; + path circle; + pair center; + numeric a,b,c,x[],y[]; + x1 := xpart M; + y1 := ypart M; + x2 := xpart N; + y2 := ypart N; + x3 := xpart P; + y3 := ypart P; + 2*x1*a+2*y1*b+c=-(x1**2+y1**2); + 2*x2*a+2*y2*b+c=-(x2**2+y2**2); + 2*x3*a+2*y3*b+c=-(x3**2+y3**2); + center := (-a,-b); + rad := sqrt(a**2+b**2-c**2); + circle := fullcircle scaled (2.0*rad) shifted center; + circle +enddef |