Fixing up scaling

graphics/graphics.go

@@ -6,7 +6,7 @@ import (
 	"github.com/veandco/go-sdl2/sdl"
 	"math"
 	"os"
-	"strconv"
+	//"strconv"
 )
 
 type Graphics struct {
@@ -55,7 +55,9 @@ func (g *Graphics) Render(env *core.Environment, turtles []*core.Turtle) {
 				amount := math.Min(float64(env.Sniff(name, x, y)), 255)
 
 				if amount > 0 {
-					g.renderer.SetDrawColor(color[0]*uint8(amount), color[1]*uint8(amount), color[2]*uint8(amount), uint8(255))
+					// TODO explictly define this scale
+					scaledamount := uint8(float64(color[0])  * (amount/2))
+					g.renderer.SetDrawColor(scaledamount,0,scaledamount, uint8(0xF0))
 					g.renderer.DrawPoint(int32(x), int32(y))
 				}
 			}
@@ -81,7 +83,7 @@ func (g *Graphics) Render(env *core.Environment, turtles []*core.Turtle) {
 
 	g.renderer.Present()
 	g.window.UpdateSurface()
-	surface, _ := g.window.GetSurface()
-	surface.SaveBMP("./images/" + strconv.Itoa(g.t) + ".bmp")
+//	surface, _ := g.window.GetSurface()
+//	surface.SaveBMP("./images/" + strconv.Itoa(g.t) + ".bmp")
 	g.t++
 }

main.go

@@ -89,6 +89,8 @@ func main() {
 		for i := 0; i < *numTurtles; i++ {
 			turtles[i] = core.NewTurtle(env, &actors.SlimeMold{SniffDistance: 20})
 		}
+		env.InitPheromone("trail")
+		g.ColorPheromone("trail", [4]uint8{0x81, 0, 0x81, 0x00})
 	}
 
 	running := true