Add simple fielder chasing and throwing mechanics.

src/main.lua

@@ -40,14 +40,44 @@ local hitAnimatorX
 
 local hitMult = 10
 
+local deltaTime = 0
+
+local basePositions = {
+    first = { x = screenW * 0.93, y = screenH * 0.52 },
+    second = { x = screenW * 0.47, y = screenH * 0.19 },
+    third = { x = screenW * 0.03, y = screenH * 0.52 },
+    home = { x = screenW * 0.474, y = screenH * 0.79 }
+}
+
+local fielders
+function resetFielders()
+    fielders = {
+        first = { x = screenW - 65, y = screenH * 0.48 },
+        second = { x = screenW * 0.70, y = screenH * 0.30 },
+        shortstop = { x = screenW * 0.30, y = screenH * 0.30 },
+        third = { x = screenW * 0.1, y = screenH * 0.48 },
+        pitcher = { x = screenW * 0.48, y = screenH * 0.40 }
+    }
+end
+resetFielders()
+
+
 function hitBall(destX, destY, hitFlyTime)
-    ballSizeAnimator:reset()
+    ballSizeAnimator:reset(ballSizeMs)
     hitAnimatorY = gfx.animator.new(hitFlyTime, ballY, destY, playdate.easingFunctions.outQuint)
     hitAnimatorX = gfx.animator.new(hitFlyTime, ballX, destX, playdate.easingFunctions.outQuint)
 end
 
+function throwBall(destX, destY)
+    local throwFlyTime = distanceBetween(ballX, ballY, destX, destY) * 5
+    ballSizeAnimator:reset(throwFlyTime)
+    hitAnimatorY = gfx.animator.new(throwFlyTime, ballY, destY, playdate.easingFunctions.linear)
+    hitAnimatorX = gfx.animator.new(throwFlyTime, ballX, destX, playdate.easingFunctions.linear)
+end
+
 function pitch()
     pitchAnimator:reset()
+    resetFielders()
     ballVelX = 0
     ballVelY = 0
     ballX = 200
@@ -74,7 +104,7 @@ function playdate.leftButtonDown()
     batBaseX -= 1
 end
 
-local pitchClockSec = 5
+local pitchClockSec = 99
 local elapsedTime = 0
 
 function ballPassedThruBat(ballX, ballY, batBaseX, batBaseY, batTipX, batTipY)
@@ -96,8 +126,57 @@ function ballPassedThruBat(ballX, ballY, batBaseX, batBaseY, batTipX, batTipY)
     return yDelta <= 0
 end
 
+function updateInfield()
+    if not hit or ballDestX == nil or ballDestY == nil then
+        return
+    end
+
+    local fielderSpeed = 50
+    for title,fielder in pairs(fielders) do
+        if fielder.targetX ~= nil and fielder.targetY ~= nil then
+            local distance, a, b = distanceBetween(fielder.x, fielder.y, fielder.targetX, fielder.targetY)
+            local normalizer = fielderSpeed / distance
+
+            if distance > 1 then
+                fielder.x -= a * normalizer * deltaTime
+                fielder.y -= b * normalizer * deltaTime
+            else
+                if fielder.onArrive then
+                    fielder.onArrive(fielder.targetX, fielder.targetY)
+                end
+                fielder.targetX = nil
+                fielder.targetY = nil
+            end
+        end
+    end
+end
+
+function distanceBetween(x1, y1, x2, y2)
+    local a = x1 - x2
+    local b = y1 - y2
+    return math.sqrt((a*a) + (b*b)), a, b
+end
+
+function getNearestFielder(x, y)
+    local nearestFielder, nearestDistance = nil, nil
+    for title,fielder in pairs(fielders) do
+        if nearestFielder == nil then
+            nearestFielder = fielder
+            nearestDistance = distanceBetween(fielder.x, fielder.y, x, y)
+        else
+            local distance = distanceBetween(fielder.x, fielder.y, x, y)
+            if distance < nearestDistance then
+                nearestFielder = fielder
+                nearestDistance = distance
+            end
+        end
+    end
+
+    return nearestFielder
+end
+
 function updateGameState()
-    local deltaTime = playdate.getElapsedTime()
+    deltaTime = playdate.getElapsedTime()
     playdate.resetElapsedTime()
     elapsedTime = elapsedTime + deltaTime
 
@@ -119,10 +198,11 @@ function updateGameState()
     batTipX = batBaseX + (batLength * math.sin(batAngle))
     batTipY = batBaseY + (batLength * math.cos(batAngle))
 
-    if hit == false and ballPassedThruBat(ballX, ballY, batBaseX, batBaseY, batTipX, batTipY) then
+    crankChange, acceleratedChange = playdate.getCrankChange()
+    if hit == false and acceleratedChange >= 0 and
+      ballPassedThruBat(ballX, ballY, batBaseX, batBaseY, batTipX, batTipY) then
         ballAngle = batAngle + math.rad(90)
 
-        crankChange, acceleratedChange = playdate.getCrankChange()
         mult = math.abs(acceleratedChange / 15)
         ballVelX = mult * 10 * math.sin(ballAngle)
         ballVelY = mult * 5 * math.cos(ballAngle)
@@ -133,9 +213,19 @@ function updateGameState()
         ballDestX = ballX + (ballVelX * hitMult)
         ballDestY = ballY + (ballVelY * hitMult)
         hitBall(ballDestX, ballDestY, 2000)
+        local chasingFielder = getNearestFielder(ballDestX, ballDestY)
+        chasingFielder.targetX = ballDestX
+        chasingFielder.targetY = ballDestY
+        chasingFielder.onArrive = function()
+            throwBall(basePositions.first.x, basePositions.first.y)
+        end
+        fielders.first.targetX = basePositions.first.x
+        fielders.first.targetY = basePositions.first.y
         hit = true
     end
     lastBallY = ballY
+
+    updateInfield()
 end
 
 function playdate.update()
@@ -147,6 +237,10 @@ function playdate.update()
     gfx.setLineWidth(2)
     gfx.drawCircleAtPoint(ballX, ballY, ballSize)
 
+    for title,fielder in pairs(fielders) do
+        gfx.fillRect(fielder.x, fielder.y, 14, 25)
+    end
+
     gfx.setLineWidth(5)
     gfx.drawLine(batBaseX, batBaseY, batTipX, batTipY)