automated snapshot

utils.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"math"
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func clamp01(v float32) float32 {
+	if v < 0 {
+		return 0
+	}
+	if v > 1 {
+		return 1
+	}
+	return v
+}
+
+func GrayCurve(v, k float32) rl.Color {
+	v = float32(math.Pow(float64(clamp01(v)), float64(k))) // k < 1 boosts highlights, k > 1 boosts shadows
+	c := uint8(v * 255)
+	return rl.Color{R: c, G: c, B: c, A: 255}
+}
+
+