feat: add preview for 3D models

go.mod

@@ -5,6 +5,7 @@ go 1.22.2
 require (
 	github.com/disintegration/imaging v1.6.2
 	github.com/dustin/go-humanize v1.0.1
+	github.com/fogleman/fauxgl v0.0.0-20200818143847-27cddc103802
 	github.com/gen2brain/go-fitz v1.23.7
 	github.com/gofiber/fiber/v2 v2.52.4
 	github.com/u2takey/ffmpeg-go v0.5.0
@@ -13,6 +14,7 @@ require (
 require (
 	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/aws/aws-sdk-go v1.38.20 // indirect
+	github.com/fogleman/simplify v0.0.0-20170216171241-d32f302d5046 // indirect
 	github.com/google/uuid v1.5.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.17.0 // indirect

go.sum

@@ -9,6 +9,10 @@ github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1
 github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/fogleman/fauxgl v0.0.0-20200818143847-27cddc103802 h1:5vdq0jOnV15v1NdZbAcU+dIJ22rFgwaieiFewPvnKCA=
+github.com/fogleman/fauxgl v0.0.0-20200818143847-27cddc103802/go.mod h1:7f7F8EvO8MWvDx9sIoloOfZBCKzlWuZV/h3TjpXOO3k=
+github.com/fogleman/simplify v0.0.0-20170216171241-d32f302d5046 h1:n3RPbpwXSFT0G8FYslzMUBDO09Ix8/dlqzvUkcJm4Jk=
+github.com/fogleman/simplify v0.0.0-20170216171241-d32f302d5046/go.mod h1:KDwyDqFmVUxUmo7tmqXtyaaJMdGon06y8BD2jmh84CQ=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/gen2brain/go-fitz v1.23.7 h1:HPhzEVzmOINvCKqQgB/DwMzYh4ArIgy3tMwq1eJTcbg=
 github.com/gen2brain/go-fitz v1.23.7/go.mod h1:HU04vc+RisUh/kvEd2pB0LAxmK1oyXdN4ftyshUr9rQ=

thumbnail/thumbnail.go

@@ -13,12 +13,13 @@ import (
 	"sync"
 
 	"github.com/disintegration/imaging"
+	"github.com/fogleman/fauxgl"
 	"github.com/gen2brain/go-fitz"
 	"github.com/gofiber/fiber/v2"
 	ffmpeg "github.com/u2takey/ffmpeg-go"
 )
 
-var SupportedFileTypes = []string{".png", ".PNG", ".jpg", ".JPG", ".jpeg", ".JPEG", ".webp", ".webP", ".WEBP", ".pdf", ".PDF", ".mp4", ".MP4", ".webm", ".WEBM", ".mkv", ".MKV"}
+var SupportedFileTypes = []string{".png", ".PNG", ".jpg", ".JPG", ".jpeg", ".JPEG", ".webp", ".webP", ".WEBP", ".pdf", ".PDF", ".mp4", ".MP4", ".webm", ".WEBM", ".mkv", ".MKV", ".obj", ".OBJ", ".stl", ".STL", ".ply", ".PLY", ".3ds", ".3DS"}
 var FileTypesMap = map[string]imaging.Format{
 	".png":  imaging.PNG,
 	".PNG":  imaging.PNG,
@@ -36,6 +37,14 @@ var FileTypesMap = map[string]imaging.Format{
 	".WEBM": imaging.PNG,
 	".mkv":  imaging.PNG,
 	".MKV":  imaging.PNG,
+	".obj":  imaging.PNG,
+	".OBJ":  imaging.PNG,
+	".stl":  imaging.PNG,
+	".STL":  imaging.PNG,
+	".ply":  imaging.PNG,
+	".PLY":  imaging.PNG,
+	".3ds":  imaging.PNG,
+	".3DS":  imaging.PNG,
 }
 
 var FFMPEGFormats = []string{
@@ -50,7 +59,19 @@ var FFMPEGFormats = []string{
 	".MKV",
 }
 
+var FauxGLFormats = []string{
+	".obj",
+	".OBJ",
+	".stl",
+	".STL",
+	".ply",
+	".PLY",
+	".3ds",
+	".3DS",
+}
+
 var thumbnailSize = 48
+var AA = 2
 
 var thumbnailCache = map[string][]byte{}
 var thumbnailCacheMutex = &sync.RWMutex{}
@@ -147,6 +168,45 @@ func GetThumbnail(c *fiber.Ctx, completePath string) {
 			Free()
 			return
 		}
+	} else if slices.Contains(FauxGLFormats, fileExt) {
+		// load a mesh
+		var mesh *fauxgl.Mesh
+		if fileExt == ".obj" || fileExt == ".OBJ" {
+			mesh, err = fauxgl.LoadOBJ(completePath)
+		} else if fileExt == ".stl" || fileExt == ".STL" {
+			mesh, err = fauxgl.LoadSTL(completePath)
+		} else if fileExt == ".ply" || fileExt == ".PLY" {
+			mesh, err = fauxgl.LoadPLY(completePath)
+		} else {
+			mesh, err = fauxgl.Load3DS(completePath)
+		}
+		if err != nil {
+			Free()
+			return
+		}
+
+		// fit mesh in a bi-unit cube centered at the origin
+		mesh.BiUnitCube()
+
+		// smooth the normals
+		mesh.SmoothNormalsThreshold(fauxgl.Radians(30))
+
+		// create a rendering context
+		context := fauxgl.NewContext(thumbnailSize*AA, thumbnailSize*AA)
+		/*context.ClearColorBufferWith(fauxgl.HexColor("#FFF8E3"))*/
+
+		// create transformation matrix and light direction
+		aspect := 1.
+		matrix := fauxgl.LookAt(fauxgl.V(-4, 1.5, -2) /* eye */, fauxgl.V(0, -0.07, 0) /* center */, fauxgl.V(0, 1, 0) /* up */).Perspective(33 /*fovy*/, aspect, 1 /* near */, 30 /* far */)
+
+		// use builtin phong shader
+		shader := fauxgl.NewPhongShader(matrix, fauxgl.V(-0.75, 1, 0.25).Normalize() /* light */, fauxgl.V(-4, 1.5, -2) /* eye */)
+		shader.ObjectColor = fauxgl.HexColor("#9e5272")
+		context.Shader = shader
+
+		// render
+		context.DrawMesh(mesh)
+		img = context.Image()
 	} else {
 		img, _, err = image.Decode(f)
 		if err != nil {