added template config and sketch

Author: aldernero

examples/noise/main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"flag"
+	"fmt"
 	"log"
 
 	"github.com/aldernero/sketchy"
@@ -9,6 +11,8 @@ import (
 	"github.com/lucasb-eyer/go-colorful"
 )
 
+var hasShownMinMax bool = false
+
 func update(s *sketchy.Sketch) {
 	s.Rand.SetSeed(int64(s.Var("seed")))
 	s.Rand.SetNoiseOctaves(int(s.Var("octaves")))
@@ -22,28 +26,48 @@ func update(s *sketchy.Sketch) {
 
 func draw(s *sketchy.Sketch, c *gg.Context) {
 	cellSize := s.Var("cellSize")
+	minNoise := 100.0
+	maxNoise := -100.0
 	for x := 0.0; x < s.SketchWidth; x += cellSize {
 		for y := 0.0; y < s.SketchHeight; y += cellSize {
 			noise := s.Rand.Noise2D(x, y)
-			hue := sketchy.Map(0, 1, 0, 360, noise)
+			if noise > maxNoise {
+				maxNoise = noise
+			}
+			if noise < minNoise {
+				minNoise = noise
+			}
+			hue := sketchy.Map(-1, 1, 0, 360, noise)
 			cellColor := colorful.Hsl(hue, 0.5, 0.5)
 			c.SetColor(cellColor)
 			c.DrawRectangle(x, y, cellSize, cellSize)
 			c.Fill()
 		}
 	}
+	if !hasShownMinMax {
+		fmt.Println(minNoise, maxNoise)
+		hasShownMinMax = true
+	}
 }
 
 func main() {
-	s, err := sketchy.NewSketchFromFile("config.json")
-	s.Updater = update
-	s.Drawer = draw
+	var configFile string
+	var prefix string
+	var randomSeed int64
+	flag.StringVar(&configFile, "c", "sketch.json", "Sketch config file")
+	flag.StringVar(&configFile, "p", "sketch", "Output file prefix")
+	flag.Int64Var(&randomSeed, "s", 0, "Random number generator seed")
+	s, err := sketchy.NewSketchFromFile(configFile)
 	if err != nil {
 		log.Fatal(err)
 	}
+	s.Prefix = prefix
+	s.RandomSeed = randomSeed
+	s.Updater = update
+	s.Drawer = draw
 	s.Init()
 	ebiten.SetWindowSize(int(s.ControlWidth+s.SketchWidth), int(s.SketchHeight))
-	ebiten.SetWindowTitle(s.Title)
+	ebiten.SetWindowTitle("Sketchy - " + s.Title)
 	ebiten.SetWindowResizable(false)
 	if err := ebiten.RunGame(s); err != nil {
 		log.Fatal(err)

sketch.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"image/color"
+	"io/ioutil"
 	"log"
 	"os"
 
@@ -13,7 +14,7 @@ import (
 )
 
 const (
-	DefaultTitle           = "Sketchy Sketch"
+	DefaultTitle           = "Sketch"
 	DefaultPrefix          = "sketch"
 	DefaultBackgroundColor = "#1e1e1e"
 	DefaultOutlineColor    = "#ffdb00"
@@ -32,6 +33,7 @@ type Sketch struct {
 	ControlOutlineColor    string         `json:"ControlOutlineColor"`
 	SketchBackgroundColor  string         `json:"SketchBackgroundColor"`
 	SketchOutlineColor     string         `json:"SketchOutlineColor"`
+	RandomSeed             int64          `json:"RandomSeed"`
 	Controls               []Slider       `json:"Controls"`
 	Updater                SketchUpdater  `json:"-"`
 	Drawer                 SketchDrawer   `json:"-"`
@@ -64,7 +66,7 @@ func (s *Sketch) Init() {
 	}
 	s.buildMaps()
 	s.parseColors()
-	s.Rand = NewRng(0)
+	s.Rand = NewRng(s.RandomSeed)
 	ctx := gg.NewContext(int(s.ControlWidth), int(s.SketchHeight))
 	s.PlaceControls(s.ControlWidth, s.SketchHeight, ctx)
 }
@@ -173,5 +175,11 @@ func (s *Sketch) parseColors() {
 }
 
 func (s *Sketch) saveConfig() {
-
+	configJson, _ := json.MarshalIndent(s, "", "    ")
+	fname := s.Prefix + "_config_" + GetTimestampString() + ".json"
+	err := ioutil.WriteFile(fname, configJson, 0644)
+	if err != nil {
+		fmt.Println(err)
+	}
+	fmt.Println("Saved config ", fname)
 }

template/sketch.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"flag"
+	"log"
+
+	"github.com/aldernero/sketchy"
+	"github.com/fogleman/gg"
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+func update(s *sketchy.Sketch) {
+	// Update logic goes here
+}
+
+func draw(s *sketchy.Sketch, c *gg.Context) {
+	// Drawing code goes here
+}
+
+func main() {
+	var configFile string
+	var prefix string
+	var randomSeed int64
+	flag.StringVar(&configFile, "c", "sketch.json", "Sketch config file")
+	flag.StringVar(&configFile, "p", "sketch", "Output file prefix")
+	flag.Int64Var(&randomSeed, "s", 0, "Random number generator seed")
+	s, err := sketchy.NewSketchFromFile(configFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	s.Prefix = prefix
+	s.RandomSeed = randomSeed
+	s.Updater = update
+	s.Drawer = draw
+	s.Init()
+	ebiten.SetWindowSize(int(s.ControlWidth+s.SketchWidth), int(s.SketchHeight))
+	ebiten.SetWindowTitle("Sketchy - " + s.Title)
+	ebiten.SetWindowResizable(false)
+	if err := ebiten.RunGame(s); err != nil {
+		log.Fatal(err)
+	}
+}

template/sketch.json

@@ -0,0 +1,21 @@
+{
+    "SketchWidth": 1080,
+    "SketchHeight": 1080,
+    "ControlWidth": 240,
+    "Controls": [
+        {
+            "Name": "control1",
+            "MinVal": 1,
+            "MaxVal": 100,
+            "Val": 10,
+            "Incr": 1
+        },
+        {
+            "Name": "control2",
+            "MinVal": 0,
+            "MaxVal": 2,
+            "Val": 0.9,
+            "Incr": 0.01
+        }
+    ]
+}