Convert to 32-bit to save space in the serialization

game.go

@@ -64,7 +64,7 @@ func (ml *MapLock) get(id string, force bool) (*game, error) {
 		id = idg.Hash()
 	}
 
-	_g := NewGame(id, *width, *height)
+	_g := NewGame(id, float32(*width), float32(*height))
 	go _g.run()
 
 	ml.Lock()
@@ -82,14 +82,14 @@ type game struct {
 	register      chan *player
 	unregister    chan *player
 	turn          int
-	width, height float64
+	width, height float32
 	spectators    map[*Spectator]bool
 	sregister     chan *Spectator
 	sunregister   chan *Spectator
 	kill          chan bool
 }
 
-func NewGame(id string, width, height float64) *game {
+func NewGame(id string, width, height float32) *game {
 	g := &game{
 		id:          id,
 		register:    make(chan *player),
@@ -217,7 +217,7 @@ func (g *game) run() {
 func (g *game) nudgeProjectiles() (rprojectiles []Projectile) {
 	rprojectiles = make([]Projectile, 0)
 	for p := range g.projectiles {
-		newPos := move(p.Position, p.MoveTo, float64(p.Speed), delta)
+		newPos := move(p.Position, p.MoveTo, float32(p.Speed), delta)
 
 		hit_player := false
 		for player := range g.players {
@@ -253,7 +253,7 @@ func (g *game) nudgeProjectiles() (rprojectiles []Projectile) {
 
 			for player := range g.players {
 				dist := v.Distance(player.Robot.Position, p.Position)
-				if dist < float64(p.Radius) {
+				if dist < float32(p.Radius) {
 
 					// TODO map damage Max to Min based on distance from explosion
 					if player.Robot.Health > 0 {