From d9f5b4e13af8b310e5711ede4302e8350413dc7d Mon Sep 17 00:00:00 2001
From: Lukas Werner <lwerner@lshigh.org>
Date: Tue, 3 May 2022 11:03:30 -0700
Subject: [PATCH] add art

---
 art/mandelbrot.go |  64 ++++++++++++++++++++++++++++++++++++++++++++++
 art/out.png       | Bin 0 -> 6360 bytes
 2 files changed, 64 insertions(+)
 create mode 100644 art/mandelbrot.go
 create mode 100644 art/out.png

diff --git a/art/mandelbrot.go b/art/mandelbrot.go
new file mode 100644
index 0000000..cec0bc9
--- /dev/null
+++ b/art/mandelbrot.go
@@ -0,0 +1,64 @@
+//NOT FINISHED
+
+package main
+
+import (
+	"image"
+	"image/png"
+	"math/cmplx"
+	"os"
+)
+
+type Color struct {
+	r uint32
+	g uint32
+	b uint32
+	a uint32
+}
+
+func (c Color) RGBA() (r, g, b, a uint32) {
+	return c.r, c.g, c.b, c.a
+}
+
+func green() Color {
+	return Color{0, 255, 0, 255}
+}
+
+func blue() Color {
+	return Color{0, 0, 255, 255}
+}
+
+func main() {
+	f, err := os.Create("out.png")
+	if err != nil {
+		os.Exit(1)
+	}
+	const (
+		xmin, ymin, xmax, ymax = -2, -2, +2, +2
+		width, height          = 1024, 1024
+	)
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+	for py := 0; py < height; py++ {
+		y := float64(py)/height*(ymax-ymin) + ymin
+		for px := 0; px < width; px++ {
+			x := float64(px)/width*(xmax-xmin) + xmin
+			z := complex(x, y)
+			img.Set(px, py, mandelbrot(z))
+		}
+	}
+	png.Encode(f, img)
+	f.Close()
+}
+
+func mandelbrot(z complex128) Color {
+	const iterations = 200
+	const contrast = 15
+	var v complex128
+	for n := uint8(0); n < iterations; n++ {
+		v = v*v + z
+		if cmplx.Abs(v) > 2 {
+			return Color{0, uint32(255 - contrast*n), 0, 255}
+		}
+	}
+	return blue()
+}
diff --git a/art/out.png b/art/out.png
new file mode 100644
index 0000000000000000000000000000000000000000..8e4c1a0a44970623ca95250ba5e0eea50a1d9c59
GIT binary patch
literal 6360
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zHtw9mX=b<B-wc2Lf3U|{F$w(02N2}bYyo)g>cO_$v5)%|&^_nbaJfCb9wq?nEm_z1
z?>nqw_u@G)PGK6<220^tstu`OLQPU?T2f1>fIi5jgf^%(lm|@>CPAaJqz&2++M+@S
zCPBO;suW5y34%mHq9Bn;5G0ngL69g&6eKbUf<!^0AdyKBB>op9ZlY$-eK`Pi-JV<1
Qx$Zt}gM3_Mm(l9*1Jd&q>;M1&

literal 0
HcmV?d00001