//=============================================================================
// 滑らかカメラの移動プラグインです。
// smoothscroll.js
// Copyright (c) 2020- 村人Ａ
//=============================================================================

/*:ja
 * @plugindesc カメラの移動を滑らかにするプラグインです。
 * @author 村人A
 *
 * @help
 * 
 * _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 * 
 * バージョン管理
 * 
 * 20/11/11　ver1.1 キャラブレが発生する現象への対策
 * 18　ver1.0 リリース
 * 
 * _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 * 
 * なめらかスクロールonの後にはカメラがプレイヤーを追う速さの数値を入れてください。
 * 1で通常のスピードです。0.02くらいがいい感じのスクロールになります。
 * イベントコマンドでスクロールをする場合は一度なめらかスクロールをoffにしてください。
 *
 * プラグインコマンド例:
 *   なめらかスライドon 0.02    # なめらかスライドon　カメラの速さを0.02に
 *   なめらかスライドoff        # なめらかスライドoff
 */

{
	'use strict';
	
	villaA_scrollSpeed = 0.80;
	villaA_mapscroll = false;
	villaA_smoothScrolling = false;
		
	//-----------------------------------------------------------------------------
	// Game_Interpreter
	//

    const _Game_Interpreter_pluginCommand = Game_Interpreter.prototype.pluginCommand;
    Game_Interpreter.prototype.pluginCommand = function(command, args) {
        _Game_Interpreter_pluginCommand.call(this, command, args);
        if (command === 'なめらかスライドon') {
			villaA_smoothScrolling = true;
			villaA_scrollSpeed = args[0];
		}
		
        if (command === 'なめらかスライドoff') {
			villaA_smoothScrolling = false;
			villaA_scrollSpeed = 1;
		}
	}

	//-----------------------------------------------------------------------------
	// Game_Map
	//

	Game_Map.prototype.player_scrollDown = function(distance) {
		if (this.isLoopVertical()) {
			this._displayY += distance;
			this._displayY %= $dataMap.height;
			if (this._parallaxLoopY) {
				this._parallaxY += distance;
			}
		} else if (this.height() >= this.screenTileY()) {
			const lastY = this._displayY;
			const diff = this._displayY + distance*villaA_scrollSpeed;
			this._displayY = Math.min(diff, this.height() - this.screenTileY());
			this._parallaxY += this._displayY - lastY;
		}
	};

	Game_Map.prototype.player_scrollLeft = function(distance) {
		if (this.isLoopHorizontal()) {
			this._displayX += $dataMap.width - distance;
			this._displayX %= $dataMap.width;
			if (this._parallaxLoopX) {
				this._parallaxX -= distance;
			}
		} else if (this.width() >= this.screenTileX()) {
			const lastX = this._displayX;
			const diff = this._displayX - distance*villaA_scrollSpeed;
			this._displayX = Math.max(diff, 0);
			this._parallaxX += this._displayX - lastX;
		}
	};

	Game_Map.prototype.player_scrollRight = function(distance) {
		if (this.isLoopHorizontal()) {
			this._displayX += distance;
			this._displayX %= $dataMap.width;
			if (this._parallaxLoopX) {
				this._parallaxX += distance;
			}
		} else if (this.width() >= this.screenTileX()) {
			const lastX = this._displayX;
			const diff = this._displayX + distance*villaA_scrollSpeed;
			this._displayX = Math.min(diff, this.width() - this.screenTileX());
			this._parallaxX += this._displayX - lastX;
		}
	};

	Game_Map.prototype.player_scrollUp = function(distance) {
		if (this.isLoopVertical()) {
			this._displayY += $dataMap.height - distance;
			this._displayY %= $dataMap.height;
			if (this._parallaxLoopY) {
				this._parallaxY -= distance;
			}
		} else if (this.height() >= this.screenTileY()) {
			const lastY = this._displayY;
			const diff = this._displayY - distance*villaA_scrollSpeed;
			this._displayY = Math.max(diff, 0);
			this._parallaxY += this._displayY - lastY;
		}
	};

	//-----------------------------------------------------------------------------
	// Game_Player
	//

	Game_Player.prototype.updateScroll = function(lastScrolledX, lastScrolledY) {
		let villaA_roundingNum = 0
		let x1 = lastScrolledX;
		let y1 = lastScrolledY;
		const x2 = this.scrolledX();
		const y2 = this.scrolledY();
		
		if(villaA_smoothScrolling){
			villaA_roundingNum = 0.5;
			x1 = 8;
			y1 = 6;
		}
		
		if (y2-villaA_roundingNum > y1 && y2 > this.centerY()) {
			$gameMap.player_scrollDown(y2 - y1);
		}
		if (x2+villaA_roundingNum < x1 && x2 < this.centerX()) {
			$gameMap.player_scrollLeft(x1 - x2);
		}
		if (x2-villaA_roundingNum > x1 && x2 > this.centerX()) {
			$gameMap.player_scrollRight(x2 - x1);
		}
		if (y2+villaA_roundingNum < y1 && y2 < this.centerY()) {
			$gameMap.player_scrollUp(y1 - y2);
		}
	};
		
	//-----------------------------------------------------------------------------
	// Game_CharacterBase
	//

	Game_CharacterBase.prototype.screenX = function() {
		const tw = $gameMap.tileWidth();
		//キャラブレ対策floor
		return Math.floor(this.scrolledX() * tw + tw / 2);
	};

	Game_CharacterBase.prototype.screenY = function() {
		const th = $gameMap.tileHeight();
		//キャラブレ対策floor
		return Math.floor(this.scrolledY() * th + th - this.shiftY() - this.jumpHeight());
	};
}