From 2f575c022ecf3ab5ba36d4414f980d30f048c433 Mon Sep 17 00:00:00 2001
From: FajsiEx <fajsiexofficial@gmail.com>
Date: Sat, 2 Oct 2021 00:17:24 +0200
Subject: [PATCH] + make the laser alerts work

---
 scripts/gameplay.lua             |  2 +-
 scripts/gameplay/laser_alert.lua | 97 ++++++++++++++++++++++++++++++--
 2 files changed, 92 insertions(+), 7 deletions(-)

diff --git a/scripts/gameplay.lua b/scripts/gameplay.lua
index 92601ce..7fc3302 100644
--- a/scripts/gameplay.lua
+++ b/scripts/gameplay.lua
@@ -75,7 +75,7 @@ function laser_slam_hit(slamLength, startPos, endPost, index)
 end
 
 function laser_alert(isRight)
-
+    LaserAlert.show(isRight)
 end
 
 function practice_start(mission_type, mission_threshold, mission_description)
diff --git a/scripts/gameplay/laser_alert.lua b/scripts/gameplay/laser_alert.lua
index a421ebb..6db06d0 100644
--- a/scripts/gameplay/laser_alert.lua
+++ b/scripts/gameplay/laser_alert.lua
@@ -7,6 +7,9 @@ local rightAlertBaseImage = gfx.CreateSkinImage("gameplay/laser_alert/right/base
 local rightAlertTopImage = gfx.CreateSkinImage("gameplay/laser_alert/right/top.png", 0)
 local rightAlertTextImage = gfx.CreateSkinImage("gameplay/laser_alert/right/text.png", 0)
 
+local TRANSITION_ALERT_ENTER_THRESHOLD = 0.075;
+local TRANSITION_ALERT_LEAVE_THRESHOLD = 0.925;
+
 local LEFT_ALERT_X_POS = 0
 local RIGHT_ALERT_X_POS = 1080 - 450*0.5
 
@@ -14,6 +17,14 @@ local ALERT_Y_POS = 1115
 
 local test = -2*3.14;
 
+local transitionLeftScale = 1;
+local transitionLeftOffsetX = 0;
+local transitionLeftOpacity = 0;
+
+local transitionRightScale = 1;
+local transitionRightOffsetX = 0;
+local transitionRightOpacity = 0;
+
 local renderLeftAlert = function ()
     -- gfx.Translate(LEFT_ALERT_X_POS, ALERT_Y_POS);
     -- -- gfx.SkewX(-1*3.14)
@@ -21,7 +32,7 @@ local renderLeftAlert = function ()
 
     gfx.BeginPath();
     gfx.ImageRect(
-        LEFT_ALERT_X_POS+450*0.5,
+        (LEFT_ALERT_X_POS+450*0.5) + transitionLeftOffsetX,
         ALERT_Y_POS+450*0.5,
         450*0.5,
         450*0.5,
@@ -32,7 +43,7 @@ local renderLeftAlert = function ()
 
     gfx.BeginPath();
     gfx.ImageRect(
-        LEFT_ALERT_X_POS+450*0.5,
+        (LEFT_ALERT_X_POS+450*0.5) + transitionLeftOffsetX,
         ALERT_Y_POS+450*0.5,
         450*0.5,
         450*0.5,
@@ -48,7 +59,7 @@ local renderLeftAlert = function ()
         450*0.5,
         450*0.5,
         leftAlertTextImage,
-        1,
+        transitionLeftOpacity,
         0
     );
 
@@ -57,7 +68,7 @@ end
 local renderRightAlert = function ()
     gfx.BeginPath();
     gfx.ImageRect(
-        RIGHT_ALERT_X_POS,
+        RIGHT_ALERT_X_POS + transitionRightOffsetX,
         ALERT_Y_POS,
         450*0.5,
         450*0.5,
@@ -68,7 +79,7 @@ local renderRightAlert = function ()
     
     gfx.BeginPath();
     gfx.ImageRect(
-        RIGHT_ALERT_X_POS,
+        RIGHT_ALERT_X_POS + transitionRightOffsetX,
         ALERT_Y_POS,
         450*0.5,
         450*0.5,
@@ -84,17 +95,91 @@ local renderRightAlert = function ()
         450*0.5,
         450*0.5,
         rightAlertTextImage,
-        1,
+        transitionRightOpacity,
         0
     );
 end
 
+local showLaserAlert = function(isRight)
+    if (isRight) then
+        if (transitionRightScale < 1) then
+            transitionRightScale = TRANSITION_ALERT_ENTER_THRESHOLD -- If the laser alert is already in progress, just reset its duration
+        else
+            transitionRightScale = 0;
+        end
+    else
+        if (transitionLeftScale < 1) then
+            transitionLeftScale = TRANSITION_ALERT_ENTER_THRESHOLD -- If the laser alert is already in progress, just reset its duration
+        else
+            transitionLeftScale = 0;
+        end
+    end
+end
+
+local tickTransitions = function (deltaTime)
+    local showScale = 0;
+
+    -- Left
+    if transitionLeftScale < 1 then
+        transitionLeftScale = transitionLeftScale + deltaTime / 3 -- transition should last for that time in seconds
+    else
+        transitionLeftScale = 1
+    end
+
+    showScale = 0;
+
+    if transitionLeftScale < TRANSITION_ALERT_ENTER_THRESHOLD then
+        showScale = transitionLeftScale/TRANSITION_ALERT_ENTER_THRESHOLD; -- 0-0.1
+    elseif transitionLeftScale > TRANSITION_ALERT_LEAVE_THRESHOLD and transitionLeftScale < 1 then
+        showScale = 1-((transitionLeftScale-TRANSITION_ALERT_LEAVE_THRESHOLD)/(1-TRANSITION_ALERT_LEAVE_THRESHOLD)); 
+    elseif transitionLeftScale >= 1 then
+        showScale = 0;
+    else
+        showScale = 1;
+    end
+
+    transitionLeftOffsetX = -450*0.5*(1-showScale);
+    transitionLeftOpacity = math.max(0, showScale-0.5)/0.5;
+
+    -- Right
+    if transitionRightScale < 1 then
+        transitionRightScale = transitionRightScale + deltaTime / 3 -- transition should last for that time in seconds
+    else
+        transitionRightScale = 1
+    end
+
+    showScale = 0;
+
+    if transitionRightScale < TRANSITION_ALERT_ENTER_THRESHOLD then
+        showScale = transitionRightScale/TRANSITION_ALERT_ENTER_THRESHOLD; -- 0-0.1
+    elseif transitionRightScale > TRANSITION_ALERT_LEAVE_THRESHOLD and transitionRightScale < 1 then
+        showScale = 1-((transitionRightScale-TRANSITION_ALERT_LEAVE_THRESHOLD)/(1-TRANSITION_ALERT_LEAVE_THRESHOLD)); 
+    elseif transitionRightScale >= 1 then
+        showScale = 0;
+    else
+        showScale = 1;
+    end
+
+    transitionRightOffsetX = 450*0.5*(1-showScale);
+    transitionRightOpacity = math.max(0, showScale-0.5)/0.5;
+end
+
 local render = function (deltaTime)
+    tickTransitions(deltaTime);
+    gfx.Save();
+
     renderLeftAlert();
     renderRightAlert();
     test = test + deltaTime;
+
+    gfx.Restore();
+    gfx.BeginPath();
+    gfx.FontSize(18)
+    gfx.TextAlign(gfx.TEXT_ALIGN_LEFT + gfx.TEXT_ALIGN_TOP)
+    gfx.Text('T_L: ' .. transitionLeftScale .. ' // T_R: ' .. transitionRightScale, 500, 500);
 end
 
 return {
+    show=showLaserAlert,
     render=render
 }
\ No newline at end of file