A simple library for writing OpenSCAD code in Go.
Shapes
- sphere
- cube
- cylinder
Transformations
- translate
- rotate
- mirror
- scale
Boolean operations
- union
- difference
- intersection
run go get github.com/richi0/gocad
Same as SCAD but with type safety, the ability to chain operations and an easy way to create your own complex shapes.
The following code creates the 3D model below.
package main
import (
"fmt"
cad "github.com/richi0/gocad"
)
func main() {
s := cad.NewSphere(11).Difference(
cad.NewSphere(3).Translate(0, 0, 8).Scale(1.5, 1.5, 1.5),
cad.NewSphere(3).Translate(0, 0, -11),
cad.NewSphere(3).Translate(11, 0, 0),
cad.NewSphere(3).Translate(-11, 0, 0),
cad.NewSphere(3).Translate(0, 11, 0),
cad.NewSphere(3).Translate(0, -11, 0),
)
c := cad.NewCube(20, 20, 20).Center().Difference(cad.NewSphere(12), cad.NewCube(20, 20, 20))
d := cad.NewDocument(s, c)
fmt.Println(d.Render())
}
Creating custom shapes is simple. For example, the box shape that is included in this library. Render is the only method you need to define. The NewBox function is just for convenience.
type Box struct {
x float64
y float64
z float64
radius float64
wall float64
Shape
}
func (b *Box) Render() string {
base := NewCube(b.x, b.y, b.z)
radius := 0.01
if b.radius != 0 {
radius = b.radius
}
diff := NewRoundedCube(b.x-2*b.wall, b.y-2*b.wall, b.z+radius, radius).Translate(b.wall, b.wall, b.wall)
res := base.Difference(diff)
return res.Render()
}
func NewBox(
x float64,
y float64,
z float64,
radius float64,
wall float64) *Box {
b := &Box{x, y, z, radius, wall, CommonMutations{}}
b.parent = b
return b
}Then use it like this.
package main
import (
"fmt"
cad "github.com/richi0/gocad"
)
func main() {
b := cad.NewBox(120, 60, 20, 5, 5)
d := cad.NewDocument(b)
fmt.Println(d.Render())
}
Created shapes can be reused easily. See the following Go code, SCAD code and the 3D-model
package main
import (
"fmt"
cad "github.com/richi0/gocad"
)
func main() {
x := cad.NewSphere(3).Hull(
cad.NewCube(10, 10, 10).Center().Translate(20, 0, 0),
cad.NewSphere(3).Translate(40, 0, 0)).Translate(-20, 0, 0)
y := x.Rotate(0, 0, 90)
z := x.Rotate(0, 90, 0)
d := cad.NewDocument(x.Union(y, z))
d.Fn = 100
fmt.Println(d.Render())
}$fn = 100;
union() {
translate([-20.000000,0.000000,0.000000]) {
hull() {
sphere(3.000000);
translate([20.000000,0.000000,0.000000]) {
translate([-5.000000,-5.000000,-5.000000]) {
cube([10.000000, 10.000000, 10.000000]);
}
}
translate([40.000000,0.000000,0.000000]) {
sphere(3.000000);
}
}
}
rotate([0.000000,0.000000,90.000000]) {
translate([-20.000000,0.000000,0.000000]) {
hull() {
sphere(3.000000);
translate([20.000000,0.000000,0.000000]) {
translate([-5.000000,-5.000000,-5.000000]) {
cube([10.000000, 10.000000, 10.000000]);
}
}
translate([40.000000,0.000000,0.000000]) {
sphere(3.000000);
}
}
}
}
rotate([0.000000,90.000000,0.000000]) {
translate([-20.000000,0.000000,0.000000]) {
hull() {
sphere(3.000000);
translate([20.000000,0.000000,0.000000]) {
translate([-5.000000,-5.000000,-5.000000]) {
cube([10.000000, 10.000000, 10.000000]);
}
}
translate([40.000000,0.000000,0.000000]) {
sphere(3.000000);
}
}
}
}
}
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