From 7908dae6738d70db44920250200cb04c0973ef11 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ccxvii.net>
Date: Sun, 16 Jul 2023 20:20:26 +0200
Subject: Animate tiles flying out from darkness.

---
 play.html |  3 ++-
 play.js   | 32 +++++++++++++++++---------------
 2 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/play.html b/play.html
index 5d914aa..a8b86f0 100644
--- a/play.html
+++ b/play.html
@@ -103,6 +103,7 @@ body.Observer #hand { display: none }
 	height: 56px;
 	left: 10px;
 	bottom: 10px;
+	z-index: 1;
 }
 
 #darkness_button.action {
@@ -130,7 +131,7 @@ body.Observer #hand { display: none }
 .token, .tile {
 	position: absolute;
 	box-sizing: border-box;
-	transition-property: top, left;
+	transition-property: top, left, opacity;
 	transition-duration: 500ms;
 	transition-timing-function: ease;
 }
diff --git a/play.js b/play.js
index ed67dac..fcde5d8 100644
--- a/play.js
+++ b/play.js
@@ -84,6 +84,7 @@ let ui = {
 	square_spaces: [],
 	tokens: [],
 	tiles: [ null ],
+	tile_was_visible: Array(54).fill(0),
 }
 
 let action_register = []
@@ -170,16 +171,6 @@ function on_init() {
 		ui.tiles[i] = create_item({ className: "tile green", my_action: "tile", my_id: i })
 }
 
-function show(elt) {
-	if (elt.parentElement !== ui.board)
-		ui.board.appendChild(elt)
-}
-
-function hide(elt) {
-	if (elt.parentElement === ui.board)
-		elt.remove()
-}
-
 function on_update() {
 	on_init()
 
@@ -190,10 +181,21 @@ function on_update() {
 	ui.darkness_button.classList.toggle("action", is_action("darkness"))
 
 	for (let i = 0; i < 54; ++i) {
-		if ((view.hand && view.hand.includes(i)) || view.red_court.includes(i) || view.blue_court.includes(i) || view.squares.includes(i))
-			show(ui.tiles[i])
-		else
-			hide(ui.tiles[i])
+		if ((view.hand && view.hand.includes(i)) || view.red_court.includes(i) || view.blue_court.includes(i) || view.squares.includes(i)) {
+			ui.tiles[i].style.opacity = 1
+			ui.tile_was_visible[i] = 1
+		} else {
+			ui.tiles[i].style.opacity = 0
+			if (ui.tile_was_visible[i]) {
+				ui.tiles[i].style.top = "674px" // 104 + 638 - 12 - 56
+				ui.tiles[i].style.left = "757px" // 825 - 12 - 56
+			} else {
+				ui.tiles[i].style.top = "674px" // 104 + 638 - 12 - 56
+				ui.tiles[i].style.left = "12px"
+			}
+			ui.tiles[i].style.zIndex = 0
+			ui.tile_was_visible[i] = 0
+		}
 	}
 
 	for (let i = 0; i < 6; ++i) {
@@ -256,7 +258,7 @@ function on_update() {
 			let y = HAND_Y
 			ui.tiles[k].style.left = x + "px"
 			ui.tiles[k].style.top = y + "px"
-			ui.tiles[k].style.zIndex = i
+			ui.tiles[k].style.zIndex = i + 100
 		}
 	}
 
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