[wip] trying to make amount of goids dynamic

config.yaml

@@ -0,0 +1,6 @@
+- step: 100
+  amount: 100
+- step: 200
+  amount: 150
+- step: 300
+  amount: 40

go.mod

@@ -7,4 +7,5 @@ require github.com/llgcode/draw2d v0.0.0-20210904075650-80aa0a2a901d
 require (
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -9,3 +9,6 @@ github.com/llgcode/ps v0.0.0-20150911083025-f1443b32eedb h1:61ndUreYSlWFeCY44JxD
 github.com/llgcode/ps v0.0.0-20150911083025-f1443b32eedb/go.mod h1:1l8ky+Ew27CMX29uG+a2hNOKpeNYEQjjtiALiBlFQbY=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81 h1:00VmoueYNlNz/aHIilyyQz/MHSqGoWJzpFv/HW8xpzI=
 golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

main.go

@@ -7,29 +7,53 @@ import (
 	"image"
 	"image/color"
 	"image/png"
+	"io/ioutil"
 	"math"
 	"math/rand"
 	"os"
 	"sort"
 
 	"github.com/llgcode/draw2d/draw2dimg"
+	"gopkg.in/yaml.v2"
 )
 
 // parameters
 var windowWidth, windowHeight = 800, 600
 var goidSize = 3
 var goidColor = color.RGBA{200, 200, 100, 255} // gray, 50% transparency
-var populationSize = 2
+var populationSize = 10
 var loops = 10000
-var numNeighbours = 2 
+var numNeighbours = 10
 var separationFactor = float64(goidSize * 5)
 var coherenceFactor = 8
 
+type steps struct {
+	Step int `yaml:"step"` 
+	Amount int `yaml:"amount"`
+}
+
+func fixGoids(goids &[]*Goid, actual int, wished int) {
+	if actual < wished {
+		g := createRandomGoid()
+		goids = append(&goids, &g)
+	} else if wished < actual {
+    fmt.Println("it's not supported yet")
+	} else {
+		return
+	}
+}
+
 func main() {
 	fo, err := os.Create("/tmp/goids.txt")
 	if err != nil {
 		panic(err)
 	}
+  conf, err := ioutil.ReadFile("config.yaml")
+	if err != nil {
+		panic(err)
+	}
+	td := []steps{}
+	err = yaml.Unmarshal(conf, &td)
 	defer func() {
 		if err := fo.Close(); err != nil {
 			panic(err)
@@ -37,19 +61,26 @@ func main() {
 	}()
 	clearScreen()
 	hideCursor()
+	var goids []*Goid
 
-	goids := make([]*Goid, 0)
 	for i := 0; i < populationSize; i++ {
 		g := createRandomGoid()
 		goids = append(goids, &g)
 	}
 
+	current_stage := 0
+
 	for i := 0; i < loops; i++ {
+		if i < td[current_stage].Step {
+			fmt.Printf("%d -- %d -- %d", i, current_stage, td[current_stage].Amount )
+			populationSize = td[current_stage].Amount
+		} else {
+			fixGoids(goids, populationSize, td[current_stage].Amount)
+			current_stage += 1
+		}
 		move(goids, fo)
 		frame := draw(goids)
 		printImage(frame.SubImage(frame.Rect))
-		// fo.Write()
-
 	}
 	showCursor()
 }
@@ -64,6 +95,7 @@ type Goid struct {
 	Color color.Color
 }
 
+
 func createRandomGoid() (g Goid) {
 	g = Goid{
 		X:     rand.Intn(windowWidth),