Download or view impossibleSphere.frink in plain text format
// This draws an "impossible" sphere inside a box for 3-D printing.
// The output is a Wavefront .obj format.
s = 254/2
radius = 18 // Radius of the edges of the cube
s2 = s - radius
v = callJava["frink.graphics.VoxelArray", "makeSphere", [s]]
// Make the edges of the cube as cylinders with hemispherical endcaps
// Bottom square
line[v, -s2, -s2, -s2, s2, -s2, -s2, radius]
line[v, -s2, -s2, -s2, -s2, s2, -s2, radius]
line[v, s2, -s2, -s2, s2, s2, -s2, radius]
line[v, -s2, s2, -s2, s2, s2, -s2, radius]
// Top square
line[v, -s2, -s2, s2, s2, -s2, s2, radius]
line[v, -s2, -s2, s2, -s2, s2, s2, radius]
line[v, s2, -s2, s2, s2, s2, s2, radius]
line[v, -s2, s2, s2, s2, s2, s2, radius]
// Vertical bars
line[v, -s2, -s2, -s2, -s2, -s2, s2, radius]
line[v, s2, -s2, -s2, s2, -s2, s2, radius]
line[v, -s2, s2, -s2, -s2, s2, s2, radius]
line[v, s2, s2, -s2, s2, s2, s2, radius]
v.projectX[undef].show["X"]
v.projectY[undef].show["Y"]
v.projectZ[undef].show["Z"]
filename = "impossibleSphere.obj"
print["Writing $filename..."]
w = new Writer[filename]
w.println[v.toObjFormat["test"]]
w.close[]
println["done."]
/** This draws a "line" (a capped cylinder) into the specified VoxelArray */
line[v, x1, y1, z1, x2, y2, z2, radius] :=
{
v.drawCappedCylinder[x1, y1, z1, x2, y2, z2, radius]
}
Download or view impossibleSphere.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 20217 days, 23 hours, 52 minutes ago.