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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "flag" | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
| "runtime" | ||
| "time" | ||
|
|
||
| "github.com/soypat/gsdf" | ||
| "github.com/soypat/gsdf/forge/threads" | ||
| "github.com/soypat/gsdf/glbuild" | ||
| "github.com/soypat/gsdf/gleval" | ||
| "github.com/soypat/gsdf/glrender" | ||
| ) | ||
|
|
||
| const visualization = "bolt.glsl" | ||
| const stl = "bolt.stl" | ||
|
|
||
| var useGPU = false | ||
|
|
||
| func init() { | ||
| flag.BoolVar(&useGPU, "gpu", useGPU, "Enable GPU usage") | ||
| flag.Parse() | ||
| if useGPU { | ||
| fmt.Println("enabled GPU usage") | ||
| runtime.LockOSThread() // For when using GPU this is required. | ||
| } | ||
| } | ||
|
|
||
| // scene generates the 3D object for rendering. | ||
| func scene() (gleval.SDF3, error) { | ||
| const L, shank = 5, 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 | ||
| } | ||
| return makeSDF(M3) | ||
| } | ||
|
|
||
| func main() { | ||
| if useGPU { | ||
| terminate, err := gleval.Init1x1GLFW() | ||
| if err != nil { | ||
| log.Fatal("failed to start GLFW", err.Error()) | ||
| } | ||
| defer terminate() | ||
| } | ||
| sceneStart := time.Now() | ||
| sdf, err := scene() | ||
| if err != nil { | ||
| fmt.Println("error making scene:", err) | ||
| os.Exit(1) | ||
| } | ||
| elapsedScene := time.Since(sceneStart) | ||
| const resDiv = 200 | ||
| const evaluationBufferSize = 1024 * 8 | ||
| resolution := sdf.Bounds().Size().Max() / resDiv | ||
| renderer, err := glrender.NewOctreeRenderer(sdf, resolution, evaluationBufferSize) | ||
| if err != nil { | ||
| fmt.Println("error creating renderer:", err) | ||
| os.Exit(1) | ||
| } | ||
| start := time.Now() | ||
| triangles, err := glrender.RenderAll(renderer) | ||
| if err != nil { | ||
| fmt.Println("error rendering triangles:", err) | ||
| os.Exit(1) | ||
| } | ||
| elapsed := time.Since(start) | ||
| evals := sdf.(interface{ Evaluations() uint64 }).Evaluations() | ||
|
|
||
| fp, err := os.Create(stl) | ||
| if err != nil { | ||
| fmt.Println("error creating file:", err) | ||
| os.Exit(1) | ||
| } | ||
| defer fp.Close() | ||
| start = time.Now() | ||
| w := bufio.NewWriter(fp) | ||
| _, err = glrender.WriteBinarySTL(w, triangles) | ||
| if err != nil { | ||
| fmt.Println("error writing triangles to file:", err) | ||
| os.Exit(1) | ||
| } | ||
| w.Flush() | ||
| fmt.Println("SDF created in ", elapsedScene, "evaluated sdf", evals, "times, rendered", len(triangles), "triangles in", elapsed, "wrote file in", time.Since(start)) | ||
| } | ||
|
|
||
| func makeSDF(s glbuild.Shader3D) (gleval.SDF3, error) { | ||
| err := glbuild.RewriteNames3D(&s, 32) // Shorten names to not crash GL tokenizer. | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if visualization != "" { | ||
| const sceneSize = 0.5 | ||
| // We include the bounding box in the visualization. | ||
| bb := s.Bounds() | ||
| envelope, err := gsdf.NewBoundsBoxFrame(bb) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| visual := gsdf.Union(s, envelope) | ||
| // Scale size and translate to center so visualization is in camera range. | ||
| center := bb.Center() | ||
| visual = gsdf.Translate(visual, center.X, center.Y, center.Z) | ||
| visual = gsdf.Scale(visual, sceneSize/bb.Size().Max()) | ||
| source := new(bytes.Buffer) | ||
| _, err = glbuild.NewDefaultProgrammer().WriteFragVisualizerSDF3(source, visual) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = os.WriteFile(visualization, source.Bytes(), 0666) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| if useGPU { | ||
| source := new(bytes.Buffer) | ||
| _, err := glbuild.NewDefaultProgrammer().WriteComputeSDF3(source, s) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return gleval.NewComputeGPUSDF3(source, s.Bounds()) | ||
| } | ||
| return gleval.NewCPUSDF3(s) | ||
| } |
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