From 81765e2a169898c4844b64b0469e269e129123ed Mon Sep 17 00:00:00 2001
From: Steven Polley <himself@stevenpolley.net>
Date: Tue, 31 Jul 2018 15:28:28 -0600
Subject: [PATCH] Experimenting with adding colors

---
 web/render.go | 11 ++++++-----
 web/web.go    |  2 +-
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/web/render.go b/web/render.go
index 54eddba..34761c4 100644
--- a/web/render.go
+++ b/web/render.go
@@ -19,13 +19,13 @@ const (
 	Brighten   = 1024
 )
 
-func mandelbrot(c complex128) uint16 {
+func mandelbrot(c complex128) uint8 {
 	var z complex128
 
 	for i := 0; i < Iterations; i++ {
 		z = z*z + c
 		if cmplx.IsNaN(z) {
-			return uint16(i)
+			return uint8(i)
 		}
 	}
 
@@ -33,7 +33,7 @@ func mandelbrot(c complex128) uint16 {
 }
 
 type pixel struct {
-	out          *image.Gray16
+	out          *image.RGBA
 	x, y         int
 	tileX, tileY int64
 	tileZoom     uint8
@@ -50,7 +50,8 @@ func computeThread() {
 				(float64(p.y)/Size+float64(p.tileY))/float64(uint(1<<p.tileZoom)),
 			),
 		)
-		p.out.SetGray16(p.x, p.y, color.Gray16{val * Brighten})
+		p.out.SetRGBA(p.x, p.y, color.RGBA{50, val, val*2 - 128, 255})
+		//	p.out.SetGray16(p.x, p.y, color.Gray16{val * Brighten})
 
 		p.wg.Done()
 	}
@@ -95,7 +96,7 @@ func renderTile(w http.ResponseWriter, r *http.Request) {
 
 	wg.Add(Size * Size)
 
-	img := image.NewGray16(image.Rect(0, 0, Size, Size))
+	img := image.NewRGBA(image.Rect(0, 0, Size, Size))
 
 	for x := 0; x < Size; x++ {
 		for y := 0; y < Size; y++ {
diff --git a/web/web.go b/web/web.go
index 3335121..60e21df 100644
--- a/web/web.go
+++ b/web/web.go
@@ -24,7 +24,7 @@ var mandelbrotTypeOptions = {
 		return '/mandelbrot/' + zoom + '/' + coord.x + '/' + coord.y + '.png';
 	},
 	tileSize: new google.maps.Size(256, 256),
-	maxZoom: (1<<8) - 1,
+	maxZoom: (1<<16) - 1,
 	minZoom: 0,
 	name: 'Mandelbrot'
 };