add UI

README.md

@@ -17,6 +17,8 @@ All images and shapes in readme were generated using this library.
 
 ## Features
 
+- UI for visualizing parts, rendered directly from shaders. See [UI example](./examples/ui) by running `go run ./examples/ui`
+
 - GPU and CPU implementations for all shapes and operations. CPU implementations are actually faster for simple parts.
 
 - Include arbitrary buffers into GPU calculation. See [`Shader` interface](./glbuild/glbuild.go).

examples/ui/ui.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"log"
+	"math"
+	"runtime"
+
+	"github.com/soypat/glgl/math/ms3"
+	"github.com/soypat/gsdf"
+	"github.com/soypat/gsdf/forge/threads"
+	"github.com/soypat/gsdf/glbuild"
+	"github.com/soypat/gsdf/gsdfaux"
+)
+
+func init() {
+	runtime.LockOSThread()
+}
+
+// scene generates the 3D object for rendering.
+func scene() (glbuild.Shader3D, error) {
+	const L, shank = 8, 3
+	threader := threads.ISO{D: 3, P: 0.5, Ext: true}
+	M3, err := threads.Bolt(threads.BoltParams{
+		Thread:      threader,
+		Style:       threads.NutHex,
+		TotalLength: L + shank,
+		ShankLength: shank,
+	})
+	if err != nil {
+		return nil, err
+	}
+	M3, _ = gsdf.Rotate(M3, 2.5*math.Pi/2, ms3.Vec{X: 1, Z: 0.1})
+	return M3, nil
+}
+
+func main() {
+	shape, err := scene()
+	shape = gsdf.Scale(shape, 0.3)
+	if err != nil {
+		log.Fatal("creating scene:", err)
+	}
+	err = gsdfaux.UI(shape, gsdfaux.UIConfig{
+		Width:  800,
+		Height: 600,
+	})
+	if err != nil {
+		log.Fatal("UI:", err)
+	}
+}

gleval/gpu_cgo.go

@@ -27,7 +27,11 @@ func (lines *Lines2DGPU) evaluate(pos []ms2.Vec, dist []float32, userData any) (
 	}
 	defer prog.Delete()
 	prog.Bind()
-	prog.SetUniform1f("WidthOffset\x00", lines.Width/2)
+	loc, err := prog.UniformLocation("WidthOffset\x00")
+	if err != nil {
+		return err
+	}
+	prog.SetUniformf(loc, lines.Width/2)
 	err = glgl.Err()
 	if err != nil {
 		return fmt.Errorf("binding LinesGPU program: %w", err)

go.mod

@@ -5,7 +5,7 @@ go 1.22.1
 require (
 	github.com/chewxy/math32 v1.11.1
 	github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71
-	github.com/soypat/glgl v0.0.0-20241007020858-78b69f528d70
+	github.com/soypat/glgl v0.0.0-20241008221808-d7a058908ab3
 )
 
 require (

go.sum

@@ -20,5 +20,9 @@ github.com/soypat/glgl v0.0.0-20241005144144-20e590a649e7 h1:mBevCWAgR+poTuSPqmy
 github.com/soypat/glgl v0.0.0-20241005144144-20e590a649e7/go.mod h1:1LcEp6XHSMCI91WlJHzl/aW4Bp5v6yQOiYFyjrlk350=
 github.com/soypat/glgl v0.0.0-20241007020858-78b69f528d70 h1:oAG7pXMAOS2v9nBaTp8qhmofwt/LlPKXPV7lxPJh60Y=
 github.com/soypat/glgl v0.0.0-20241007020858-78b69f528d70/go.mod h1:1LcEp6XHSMCI91WlJHzl/aW4Bp5v6yQOiYFyjrlk350=
+github.com/soypat/glgl v0.0.0-20241007044135-f3d594c19467 h1:I3OXt51Iddvx24TmQrh8mRl91KgTNKZwnKote6YHBac=
+github.com/soypat/glgl v0.0.0-20241007044135-f3d594c19467/go.mod h1:1LcEp6XHSMCI91WlJHzl/aW4Bp5v6yQOiYFyjrlk350=
+github.com/soypat/glgl v0.0.0-20241008221808-d7a058908ab3 h1:XQ/ITfV8+nbgFXL+tyjihgwppmxF2hyjDtRNCClwalY=
+github.com/soypat/glgl v0.0.0-20241008221808-d7a058908ab3/go.mod h1:1LcEp6XHSMCI91WlJHzl/aW4Bp5v6yQOiYFyjrlk350=
 golang.org/x/exp v0.0.0-20221230185412-738e83a70c30 h1:m9O6OTJ627iFnN2JIWfdqlZCzneRO6EEBsHXI25P8ws=
 golang.org/x/exp v0.0.0-20221230185412-738e83a70c30/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=

gsdfaux/gsdfaux.go

@@ -35,6 +35,17 @@ type RenderConfig struct {
 	EnableCaching bool
 }
 
+type UIConfig struct {
+	Width, Height int
+}
+
+func UI(s glbuild.Shader3D, cfg UIConfig) error {
+	if s == nil {
+		return errors.New("nil shader")
+	}
+	return ui(s, cfg)
+}
+
 // RenderShader3D is an auxiliary function to aid users in getting setup in using gsdf quickly.
 // Ideally users should implement their own rendering functions since applications may vary widely.
 func RenderShader3D(s glbuild.Shader3D, cfg RenderConfig) (err error) {

gsdfaux/gsdfaux_nocgo.go

@@ -0,0 +1,9 @@
+//go:build tinygo || !cgo
+
+package gsdfaux
+
+import "github.com/soypat/gsdf/glbuild"
+
+func ui(s glbuild.Shader3D, cfg UIConfig) error {
+	return errors.new("require cgo for UI rendering")
+}