From 22c3791a7f7e5e93ab429f2ede4682d50e5ea7d9 Mon Sep 17 00:00:00 2001
From: Dietrich Featherston <d@d2fn.com>
Date: Mon, 5 Jan 2026 13:42:07 -0600
Subject: [PATCH] dynamic window sizing

---
 main.go | 73 ++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 51 insertions(+), 22 deletions(-)

diff --git a/main.go b/main.go
index fe0193e..6eff106 100644
--- a/main.go
+++ b/main.go
@@ -17,32 +17,61 @@ import (
 	//"github.com/ojrac/opensimplex-go"
 )
 
-var snapshotsPath string
+var (
+	snapshotsPath string
+	storage *Storage
+	sourceWidth, sourceHeight int
+	targetWidth, targetHeight int
+)
+
+func bootstrap() {
+
+	rl.InitWindow(800, 600, "bootstrap")
+
+	monitor := rl.GetCurrentMonitor()
+	fmt.Printf("Using monitor %d\n", monitor)
+
+	monitorWidth := rl.GetMonitorWidth(monitor)
+	monitorHeight := rl.GetMonitorHeight(monitor)
+
+	defaultTargetWidth := int(float32(monitorWidth) * 0.95)
+	defaultTargetHeight := int(float32(monitorHeight) * 0.9)
+	defaultSourceWidth := 5*defaultTargetWidth
+	defaultSourceHeight := 5*defaultTargetHeight
+
+	fmt.Printf("monitor : %d x %d / window : %d x %d / buffer : %d x %d",
+							monitorWidth, monitorHeight,
+							defaultTargetWidth, defaultTargetHeight,
+							defaultSourceWidth, defaultSourceHeight)
+
+	flag.StringVar(&snapshotsPath, "path", "snapshots", "Path to snapshots and db")
+	flag.IntVar(&sourceWidth, "bw", defaultSourceWidth, "Width of the internal graphics source")
+	flag.IntVar(&sourceHeight, "bh", defaultSourceHeight, "Height of the internal graphics source")
+	flag.IntVar(&targetWidth, "w", defaultTargetWidth, "Width of the display window")
+	flag.IntVar(&targetHeight, "h", defaultTargetHeight, "Height of the display window")
+	flag.Parse()
+
+	rl.CloseWindow()
+
+	log.Printf("Storing snapshots at '%s'\n", snapshotsPath)
+
+	os.MkdirAll(snapshotsPath, 0755)
+	var err error
+	storage, err = NewStorage(snapshotsPath)
+	if err != nil {
+		log.Printf("Error loading storage: %v\n", err)
+		os.Exit(1)
+	}
+}
 
 func main() {
 
 	log := log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
 
-	flag.StringVar(&snapshotsPath, "path", "snapshots", "Path to snapshots and db")
-	flag.Parse()
-
-	var sourceWidth int32 = 8000
-	var sourceHeight int32 = 6400
-
-	var targetWidth int32 = int32(1600)
-	var targetHeight int32 = int32(1000)
-
-	log.Printf("Storing snapshots at '%s'\n", snapshotsPath)
-
-	os.MkdirAll(snapshotsPath, 0755)
-	storage, err := NewStorage(snapshotsPath)
-	if err != nil {
-		log.Printf("Error loading storage: %v\n", err)
-		os.Exit(1)
-	}
+	bootstrap()
 
 	//rl.SetConfigFlags(rl.FlagMsaa4xHint)
-	rl.InitWindow(targetWidth, targetHeight, "sumi sierpinski arrow")
+	rl.InitWindow(int32(targetWidth), int32(targetHeight), "sumi sierpinski arrow")
 
 	// layout_name: controls initialization
 	var ControlScrollPaneScrollView rl.Rectangle
@@ -72,8 +101,8 @@ func main() {
 				scale: 100.0,
 				field: &AdderField {
 					fields: []Field {
+						&ScaleField { scale: 10,field: noiseField },
 						sinXYField,
-						noiseField,
 					},
 				},
 			},
@@ -81,7 +110,7 @@ func main() {
 
 	sierpinskiLayer := &SierpinskiArrow { dirty: true }
 
-	sketch := NewSketch(sourceWidth, sourceHeight)
+	sketch := NewSketch(int32(sourceWidth), int32(sourceHeight))
 
 	fieldColor := colorCycle.Next()
 	fmt.Printf("field color = %v\n", fieldColor)
@@ -102,7 +131,7 @@ func main() {
 	//NewColor(11, 35, 176, 50),
 
 	//r
-	contourLayer := NewContourLayer(&sketch, rng, field, actorColor, -10*math.Pi, 10*math.Pi)
+	contourLayer := NewContourLayer(&sketch, rng, field, actorColor, -25*math.Pi, 25*math.Pi)
 	sketch.AddLayer("contours", contourLayer)
 	sketch.AddLayer("sierpinski-arrowhead", sierpinskiLayer)
 //	aurora := NewImageLayer("/home/d/Dropbox/photos/Events/2025/Aurora/Photo Nov 11 2025, 9 52 03 PM.jpg")