first pass at repair mode

player.go

@@ -39,6 +39,18 @@ func (p *player) recv() {
 			log.Print("problem receiving JSON from player: ", err)
 			break
 		}
+
+		if msg.Repair != nil {
+			p.Robot.TargetSpeed = 0
+			p.Robot.FireAt = nil
+			p.Robot.MoveTo = nil
+			if p.Robot.RepairCounter <= 0 {
+				p.Robot.RepairCounter = 3.0
+			}
+		} else {
+			p.Robot.RepairCounter = 0
+
+			// Reapiring halts all other activity
 			if msg.MoveTo != nil {
 				p.Robot.MoveTo = msg.MoveTo
 			}
@@ -52,6 +64,8 @@ func (p *player) recv() {
 				p.Robot.TargetSpeed = p.Robot.Stats.Speed
 			}
 		}
+
+	}
 	log.Printf("player %s: recv close", p.Robot.Id)
 	p.ws.Close()
 }
@@ -116,8 +130,11 @@ func (p *player) Tick(g *game) {
 		current_heading = p.Robot.MoveTo.Sub(p.Robot.Position).Normalize()
 	}
 
+	new_heading := current_heading
+	if p.Robot.MoveTo != nil {
 		// Where do we WANT to be heading?
-	new_heading := p.Robot.MoveTo.Sub(p.Robot.Position).Normalize()
+		new_heading = p.Robot.MoveTo.Sub(p.Robot.Position).Normalize()
+	}
 
 	if new_heading.Mag() > 0 {
 		// Is our direction change too much? Hard coding to 5 degrees/s for now
@@ -165,6 +182,14 @@ func (p *player) Tick(g *game) {
 		}
 	}
 
+	if math.Abs(float64(p.Robot.Speed)) < v.Epsilon && p.Robot.RepairCounter > 0 {
+		p.Robot.RepairCounter -= delta
+		if p.Robot.RepairCounter < 0 {
+			p.Robot.Health += 5
+			p.Robot.RepairCounter = 3.0
+		}
+	}
+
 	if p.Robot.FireAt != nil {
 		proj := p.fire(g.projectiles, g.turn)
 		if proj != nil {

robot.go

@@ -11,6 +11,7 @@ type Robot struct {
 	TargetSpeed   float32    `json:"-"`
 	Speed         float32    `json:"speed"`
 	Health        int        `json:"health"`
+	RepairCounter float32    `json:"repair"`
 	Position      v.Point2d  `json:"position"`
 	Heading       v.Vector2d `json:"heading"`
 	MoveTo        *v.Point2d `json:"-"`
@@ -157,5 +158,6 @@ type Instruction struct {
 	MoveTo      *v.Point2d `json:"move_to,omitempty"`
 	FireAt      *v.Point2d `json:"fire_at,omitempty"`
 	TargetSpeed *float32   `json:"target_speed,omitempty"`
+	Repair      *bool      `json:"repair,omitempty"`
 	Stats       Stats      `json:"stats"`
 }