Adding snowball inspired algorithm

actors/snowball.go

@@ -0,0 +1,57 @@
+package actors
+
+import (
+"git.openprivacy.ca/sarah/microworlds/core"
+"math/rand"
+"strconv"
+)
+
+type Snowball struct {
+	color int
+	Probability float32
+	sureness float32
+}
+
+func (sm *Snowball) Snowball(env *core.Environment, t *core.Turtle) {
+	num := rand.Intn(100)
+	if num >= int(sm.Probability*100.0) {
+		sm.color = 2
+	} else {
+		sm.color = 1
+	}
+	sm.sureness = 1
+}
+
+func (sm *Snowball) Run(env *core.Environment, t *core.Turtle) {
+	t.Wiggle()
+	am1 := t.Amount(env,1,"1")
+	am2 := t.Amount(env,1,"2")
+
+	t.Drop(env, sm.sureness, strconv.Itoa(sm.color))
+
+
+	if am1 > sm.sureness || am2 > sm.sureness {
+		if am1 > am2 {
+			if sm.color == 2 {
+				sm.sureness--
+			} else {
+				sm.sureness++
+			}
+			if sm.sureness == 0 {
+				sm.color = 1
+			}
+		} else if am2 > am1 {
+			if sm.color == 1 {
+				sm.sureness--
+			} else {
+				sm.sureness++
+			}
+			if sm.sureness == 0 {
+				sm.color = 2
+			}
+		}
+	}
+	t.Step(env)
+}
+
+

main.go

@@ -101,6 +101,14 @@ func main() {
 		env.InitPheromone("2")
 		g.ColorPheromone("1", [4]uint8{0x80, 0xFF, 0x00, 0x00})
 		g.ColorPheromone("2", [4]uint8{0xFF, 0, 0xFF, 0x00})
+	case "snowball":
+		for i := 0; i < *numTurtles; i++ {
+			turtles[i] = core.NewTurtle(env, &actors.Slush{Probability:float32(*prob)})
+		}
+		env.InitPheromone("1")
+		env.InitPheromone("2")
+		g.ColorPheromone("1", [4]uint8{0x00, 0xFF, 0x80, 0x00})
+		g.ColorPheromone("2", [4]uint8{0xFF, 0x80, 0x00, 0x00})
 	case "flocking":
 		for i := 0; i < *numTurtles; i++ {
 			turtles[i] = core.NewTurtle(env, &actors.Flocking{SniffDistance: 1})