Exemplo n.º 1
0
func main() {
	log.SetFlags(0)
	args := os.Args[1:]
	if len(args) < 3 || len(args)%2 != 1 {
		log.Fatalln("Usage: combine path1.png weight1 path2.png weight2 ... output.png")
	}
	var images []image.Image
	var weights []int64
	var totalWeight int64
	for i := 0; i < len(args)-1; i += 2 {
		path := args[i]
		weight, err := strconv.ParseInt(args[i+1], 0, 0)
		if err != nil {
			log.Fatalf("Invalid weight: %s\n", args[i+1])
		}
		fmt.Printf("Loading %s...\n", path)
		im, err := pt.LoadPNG(path)
		if err != nil {
			log.Fatalf("Error loading %s: %v", path, err)
		}
		images = append(images, im)
		weights = append(weights, weight)
		totalWeight += weight
	}
	for i := 1; i < len(images); i++ {
		s1 := images[0].Bounds().Max
		s2 := images[i].Bounds().Max
		if s1 != s2 {
			log.Fatalf("Images must all have the same dimensions")
		}
	}
	fmt.Println("Combining images...")
	size := images[0].Bounds().Max
	w, h := size.X, size.Y
	result := image.NewNRGBA(image.Rect(0, 0, w, h))
	for y := 0; y < h; y++ {
		for x := 0; x < w; x++ {
			fr, fg, fb := 0.0, 0.0, 0.0
			for i, im := range images {
				weight := float64(weights[i])
				r, g, b, _ := im.At(x, y).RGBA()
				fr += weight * float64(r) / 65535
				fg += weight * float64(g) / 65535
				fb += weight * float64(b) / 65535
			}
			fr /= float64(totalWeight)
			fg /= float64(totalWeight)
			fb /= float64(totalWeight)
			r := uint8(math.Min(255, fr*255))
			g := uint8(math.Min(255, fg*255))
			b := uint8(math.Min(255, fb*255))
			result.SetNRGBA(x, y, color.NRGBA{r, g, b, 255})
		}
	}
	path := args[len(args)-1]
	if err := pt.SavePNG(path, result); err != nil {
		log.Fatalf("Error saving %s: %v", path, err)
	}
}
Exemplo n.º 2
0
func main() {
	scene := pt.Scene{}
	scene.Add(pt.NewSphere(pt.Vector{-2, 5, -3}, 0.5, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation)))
	scene.Add(pt.NewSphere(pt.Vector{5, 5, -3}, 0.5, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation)))
	scene.Add(pt.NewCube(pt.Vector{-30, -1, -30}, pt.Vector{30, 0, 30}, pt.SpecularMaterial(pt.HexColor(0xFCFAE1), 2)))
	mesh, err := pt.LoadOBJ("examples/teapot.obj", pt.SpecularMaterial(pt.HexColor(0xB9121B), 2))
	if err != nil {
		log.Fatalln("LoadOBJ error:", err)
	}
	scene.Add(mesh)
	camera := pt.LookAt(pt.Vector{2, 5, -6}, pt.Vector{0.5, 1, 0}, pt.Vector{0, 1, 0}, 45)
	im := pt.Render(&scene, &camera, 2560/4, 1440/4, 4, 16, 4)
	if err := pt.SavePNG("out.png", im); err != nil {
		log.Fatalln("SavePNG error:", err)
	}
}
Exemplo n.º 3
0
func main() {
	scene := pt.Scene{}
	material := pt.DiffuseMaterial(pt.HexColor(0x334D5C))
	scene.Add(pt.NewSphere(pt.Vector{0.5, 1, 3}, 0.5, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation)))
	scene.Add(pt.NewSphere(pt.Vector{1.5, 1, 3}, 0.5, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation)))
	scene.Add(pt.NewCube(pt.Vector{-5, -5, -2}, pt.Vector{5, 5, -1}, material))
	mesh, err := pt.LoadOBJ("examples/suzanne.obj", pt.SpecularMaterial(pt.HexColor(0xEFC94C), 2))
	if err != nil {
		log.Fatalln("LoadOBJ error:", err)
	}
	scene.Add(mesh)
	camera := pt.LookAt(pt.Vector{1, -0.45, 4}, pt.Vector{1, -0.6, 0.4}, pt.Vector{0, 1, 0}, 45)
	im := pt.Render(&scene, &camera, 2560/4, 1440/4, 4, 16, 4)
	if err := pt.SavePNG("out.png", im); err != nil {
		log.Fatalln("SavePNG error:", err)
	}
}
Exemplo n.º 4
0
func main() {
	scene := pt.Scene{}
	material := pt.GlossyMaterial(pt.HexColor(0xEFC94C), 3, pt.Radians(30))
	whiteMat := pt.GlossyMaterial(pt.Color{1, 1, 1}, 3, pt.Radians(30))
	for x := 0; x < 10; x++ {
		for z := 0; z < 10; z++ {
			center := pt.Vector{float64(x) - 4.5, 0, float64(z) - 4.5}
			scene.Add(pt.NewSphere(center, 0.4, material))
		}
	}
	scene.Add(pt.NewCube(pt.Vector{-100, -1, -100}, pt.Vector{100, 0, 100}, whiteMat))
	scene.Add(pt.NewSphere(pt.Vector{-1, 3, -1}, 0.5, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation)))
	camera := pt.LookAt(pt.Vector{0, 4, -8}, pt.Vector{0, 0, -2}, pt.Vector{0, 1, 0}, 45)
	im := pt.Render(&scene, &camera, 2560/4, 1440/4, 4, 16, 8)
	if err := pt.SavePNG("out.png", im); err != nil {
		log.Fatalln("SavePNG error:", err)
	}
}