cmd/ledcontroller-server/main.go

@@ -24,12 +24,11 @@ var sema = make(chan struct{}, 1) // a binary semaphore guarding currentFrame
 
 var currentEffect queue.QueueItem
 var globalEffectChannel = make(chan queue.QueueItem, 1024)
-var universeCount int = 0
 
 func foreverLoop() {
 	for /*ever*/ {
 		time.Sleep(40 * time.Millisecond) //25fps
-		for u := 0; u < universeCount; u++ {
+		for u := 0; u < 2; u++ {
 			sema <- struct{}{} // acquire token
 			channels[u] <- currentFrame[u]
 			<-sema
@@ -44,6 +43,8 @@ func reduceBrightness(universe [512]byte, percentage int) [512]byte {
 	return universe
 }
 
+var universeCount int = 0
+
 func main() {
 	go func() {
 		var err error
@@ -73,7 +74,7 @@ func main() {
 	}
 
 	universeCount = int(math.Ceil(float64(PanelHeight*PanelWidth*3) / 510))
-	fmt.Printf("Universe count is %d\n", universeCount)
+	fmt.Printf("Universe count is %d", universeCount)
 
 	PanelBrightness, err := strconv.Atoi(os.Getenv("PANEL_BRIGHTNESS"))
 	if err != nil {
@@ -110,8 +111,7 @@ func main() {
 	e.SeedColour[1] = 255
 	e.SeedColour[2] = 0
 	globalEffectChannel <- e
-	e.Effect = "plasma"
-	e.Speed = 40
+	e.Effect = "default"
 	globalEffectChannel <- e
 
 	go func() {
@@ -120,11 +120,7 @@ func main() {
 				currentEffect.Duration -= 40
 			} else {
 				if len(globalEffectChannel) > 0 {
-					lastEffect := currentEffect
 					currentEffect = <-globalEffectChannel
-					if lastEffect != currentEffect {
-						fmt.Printf("New effect selected : %s\n", currentEffect.Effect)
-					}
 				}
 			}
 			var rearranged [][]byte

internal/patterns/plasma.go

@@ -1,15 +1,9 @@
 package patterns
 
-import (
-	"math"
-)
+import "math"
 
 type RGBcolor = [3]byte
 
-func floatColorToIntColor(val float64) byte {
-	return byte(val*256 - 0.5)
-}
-
 func plasmaRGBFromVal(val byte) (byte, byte, byte) {
 	var r byte
 	var g byte
@@ -30,6 +24,7 @@ func plasmaRGBFromVal(val byte) (byte, byte, byte) {
 	return r, g, b
 }
 
+
 func LinearPlasma(l int) []byte {
 	line := make([]byte, l*3)
 	for i := 0; i < l*3; i += 3 {
@@ -42,66 +37,26 @@ func LinearPlasma(l int) []byte {
 	return line
 }
 
-func linearFromVal(val byte) (byte, byte, byte) {
-	var r byte = val
-	var g byte = 0
-	var b byte = 0
-	return r, g, b
-}
-
-func positiveModF(val float64) float64 {
-	_, val = math.Modf(val)
-	if val < 0 {
-		return val + 1.0
-	}
-	return val
-}
-
-func colorPlasmaFromFloatVal(val float64) (byte, byte, byte) {
-	var r byte
-	var g byte
-	var b byte
-	val = positiveModF(val) * 3.0
-	if val < 1.0 {
-		r = floatColorToIntColor(val)
-		g = floatColorToIntColor(1.0 - val)
-		b = 0
-	} else if val < 2.0 {
-		b = floatColorToIntColor(val - 1.0)
-		r = floatColorToIntColor(1.0 - (val - 1.0))
-		g = 0.0
-	} else {
-		g = floatColorToIntColor(val - 2.0)
-		b = floatColorToIntColor(1.0 - (val - 2.0))
-		r = 0.0
-	}
-	return r, g, b
-}
-
-var palletteOffset float64 = 0.0
+var offset float64 = 0.5
 
 func PlasmaPanel(w int, h int, speed uint16) [][]RGBcolor {
 	grid := make([][]RGBcolor, w)
 	for i := 0; i < w; i++ {
 		grid[i] = make([]RGBcolor, h)
 	}
-
-	// pbrook didn't say what DT is for... so it resolves to 0.05
-	palletteOffset -= 0.05 / 1.0
-	if palletteOffset < 0 {
-		palletteOffset += 1.0
-	}
-
-	offset := 0.5 // center offset
 	scale := math.Pi * 2.0 / float64(w)
-
+	step := float64(5 * speed / 40)
+	offset -= step
+	if offset < 0 {
+		offset += 1.0
+	}
 	for y := 0; y < h; y++ {
 		for x := 0; x < w; x++ {
 			u := math.Cos((float64(x) + offset) * scale)
 			v := math.Cos((float64(y) + offset) * scale)
-			j := math.Cos(offset * scale) // 2D - No Z
-			e := (u + v + j + 3.0) / 6.0
-			r, g, b := colorPlasmaFromFloatVal(palletteOffset + e)
+			w := math.Cos((float64(w) + offset) * scale)
+			e := (u + v + w + 3.0) / 6.0
+			r, g, b := plasmaRGBFromVal(byte((offset + e) * 255))
 			var rgb [3]byte
 			rgb[0] = r
 			rgb[1] = g

internal/webserver/webserver.go

@@ -1,17 +1,18 @@
 package webserver
 
 import (
-	queue "git.martyn.berlin/martyn/LEDController/internal/queue"
+
 	"github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
+	queue "git.martyn.berlin/martyn/LEDController/internal/queue"
 	"golang.org/x/image/colornames"
 
 	"fmt"
 	"net/http"
 	"os"
+	"time"
 	"strconv"
 	"strings"
-	"time"
 )
 
 func HealthHandler(response http.ResponseWriter, request *http.Request) {
@@ -29,7 +30,7 @@ func RootHandler(response http.ResponseWriter, request *http.Request) {
 	fmt.Fprint(response, "Not implemented")
 }
 
-var globalQueue chan queue.QueueItem
+var globalQueue chan queue.QueueItem;
 
 func PatternHandler(response http.ResponseWriter, request *http.Request) {
 	vars := mux.Vars(request)
@@ -67,7 +68,7 @@ func ColourHandler(response http.ResponseWriter, request *http.Request) {
 		e.Duration = 5000
 	}
 	var c queue.RGBcolor
-	for cn, cv := range colornames.Map {
+	for cn, cv := range(colornames.Map) {
 		if cn == strings.ToLower(vars["name"]) {
 			c[0] = cv.R
 			c[1] = cv.G
@@ -92,7 +93,7 @@ func FadeHandler(response http.ResponseWriter, request *http.Request) {
 		e.Duration = 5000
 	}
 	var c queue.RGBcolor
-	for cn, cv := range colornames.Map {
+	for cn, cv := range(colornames.Map) {
 		if cn == strings.ToLower(vars["namefrom"]) {
 			c[0] = cv.R
 			c[1] = cv.G
@@ -100,7 +101,7 @@ func FadeHandler(response http.ResponseWriter, request *http.Request) {
 		}
 	}
 	e.SeedColour = c
-	for cn, cv := range colornames.Map {
+	for cn, cv := range(colornames.Map) {
 		if cn == strings.ToLower(vars["nameto"]) {
 			c[0] = cv.R
 			c[1] = cv.G