359 lines
10 KiB
JavaScript
359 lines
10 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2020 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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var Class = require('../../utils/Class');
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var DefaultDefs = require('./DefaultDefs');
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/**
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* @classdesc
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* [description]
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*
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* @class CollisionMap
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* @memberof Phaser.Physics.Impact
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* @constructor
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* @since 3.0.0
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*
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* @param {integer} [tilesize=32] - [description]
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* @param {array} [data] - [description]
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*/
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var CollisionMap = new Class({
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initialize:
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function CollisionMap (tilesize, data)
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{
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if (tilesize === undefined) { tilesize = 32; }
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#tilesize
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* @type {integer}
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* @default 32
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* @since 3.0.0
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*/
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this.tilesize = tilesize;
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#data
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* @type {array}
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* @since 3.0.0
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*/
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this.data = (Array.isArray(data)) ? data : [];
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#width
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* @type {number}
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* @since 3.0.0
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*/
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this.width = (Array.isArray(data)) ? data[0].length : 0;
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#height
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* @type {number}
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* @since 3.0.0
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*/
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this.height = (Array.isArray(data)) ? data.length : 0;
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#lastSlope
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* @type {integer}
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* @default 55
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* @since 3.0.0
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*/
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this.lastSlope = 55;
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/**
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* [description]
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*
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* @name Phaser.Physics.Impact.CollisionMap#tiledef
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* @type {object}
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* @since 3.0.0
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*/
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this.tiledef = DefaultDefs;
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},
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/**
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* [description]
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*
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* @method Phaser.Physics.Impact.CollisionMap#trace
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* @since 3.0.0
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*
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* @param {number} x - [description]
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* @param {number} y - [description]
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* @param {number} vx - [description]
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* @param {number} vy - [description]
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* @param {number} objectWidth - [description]
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* @param {number} objectHeight - [description]
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*
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* @return {boolean} [description]
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*/
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trace: function (x, y, vx, vy, objectWidth, objectHeight)
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{
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// Set up the trace-result
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var res = {
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collision: { x: false, y: false, slope: false },
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pos: { x: x + vx, y: y + vy },
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tile: { x: 0, y: 0 }
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};
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if (!this.data)
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{
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return res;
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}
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var steps = Math.ceil(Math.max(Math.abs(vx), Math.abs(vy)) / this.tilesize);
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if (steps > 1)
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{
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var sx = vx / steps;
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var sy = vy / steps;
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for (var i = 0; i < steps && (sx || sy); i++)
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{
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this.step(res, x, y, sx, sy, objectWidth, objectHeight, vx, vy, i);
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x = res.pos.x;
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y = res.pos.y;
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if (res.collision.x)
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{
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sx = 0;
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vx = 0;
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}
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if (res.collision.y)
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{
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sy = 0;
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vy = 0;
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}
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if (res.collision.slope)
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{
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break;
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}
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}
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}
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else
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{
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this.step(res, x, y, vx, vy, objectWidth, objectHeight, vx, vy, 0);
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}
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return res;
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},
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/**
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* [description]
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*
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* @method Phaser.Physics.Impact.CollisionMap#step
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* @since 3.0.0
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*
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* @param {object} res - [description]
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* @param {number} x - [description]
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* @param {number} y - [description]
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* @param {number} vx - [description]
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* @param {number} vy - [description]
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* @param {number} width - [description]
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* @param {number} height - [description]
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* @param {number} rvx - [description]
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* @param {number} rvy - [description]
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* @param {number} step - [description]
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*/
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step: function (res, x, y, vx, vy, width, height, rvx, rvy, step)
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{
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var t = 0;
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var tileX;
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var tileY;
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var tilesize = this.tilesize;
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var mapWidth = this.width;
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var mapHeight = this.height;
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// Horizontal
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if (vx)
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{
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var pxOffsetX = (vx > 0 ? width : 0);
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var tileOffsetX = (vx < 0 ? tilesize : 0);
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var firstTileY = Math.max(Math.floor(y / tilesize), 0);
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var lastTileY = Math.min(Math.ceil((y + height) / tilesize), mapHeight);
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tileX = Math.floor((res.pos.x + pxOffsetX) / tilesize);
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var prevTileX = Math.floor((x + pxOffsetX) / tilesize);
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if (step > 0 || tileX === prevTileX || prevTileX < 0 || prevTileX >= mapWidth)
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{
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prevTileX = -1;
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}
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if (tileX >= 0 && tileX < mapWidth)
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{
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for (tileY = firstTileY; tileY < lastTileY; tileY++)
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{
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if (prevTileX !== -1)
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{
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t = this.data[tileY][prevTileX];
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if (t > 1 && t <= this.lastSlope && this.checkDef(res, t, x, y, rvx, rvy, width, height, prevTileX, tileY))
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{
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break;
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}
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}
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t = this.data[tileY][tileX];
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if (t === 1 || t > this.lastSlope || (t > 1 && this.checkDef(res, t, x, y, rvx, rvy, width, height, tileX, tileY)))
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{
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if (t > 1 && t <= this.lastSlope && res.collision.slope)
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{
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break;
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}
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res.collision.x = true;
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res.tile.x = t;
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res.pos.x = (tileX * tilesize) - pxOffsetX + tileOffsetX;
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x = res.pos.x;
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rvx = 0;
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break;
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}
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}
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}
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}
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// Vertical
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if (vy)
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{
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var pxOffsetY = (vy > 0 ? height : 0);
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var tileOffsetY = (vy < 0 ? tilesize : 0);
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var firstTileX = Math.max(Math.floor(res.pos.x / tilesize), 0);
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var lastTileX = Math.min(Math.ceil((res.pos.x + width) / tilesize), mapWidth);
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tileY = Math.floor((res.pos.y + pxOffsetY) / tilesize);
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var prevTileY = Math.floor((y + pxOffsetY) / tilesize);
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if (step > 0 || tileY === prevTileY || prevTileY < 0 || prevTileY >= mapHeight)
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{
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prevTileY = -1;
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}
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if (tileY >= 0 && tileY < mapHeight)
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{
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for (tileX = firstTileX; tileX < lastTileX; tileX++)
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{
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if (prevTileY !== -1)
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{
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t = this.data[prevTileY][tileX];
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if (t > 1 && t <= this.lastSlope && this.checkDef(res, t, x, y, rvx, rvy, width, height, tileX, prevTileY))
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{
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break;
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}
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}
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t = this.data[tileY][tileX];
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if (t === 1 || t > this.lastSlope || (t > 1 && this.checkDef(res, t, x, y, rvx, rvy, width, height, tileX, tileY)))
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{
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if (t > 1 && t <= this.lastSlope && res.collision.slope)
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{
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break;
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}
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res.collision.y = true;
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res.tile.y = t;
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res.pos.y = tileY * tilesize - pxOffsetY + tileOffsetY;
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break;
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}
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}
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}
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}
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},
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/**
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* [description]
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*
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* @method Phaser.Physics.Impact.CollisionMap#checkDef
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* @since 3.0.0
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*
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* @param {object} res - [description]
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* @param {number} t - [description]
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* @param {number} x - [description]
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* @param {number} y - [description]
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* @param {number} vx - [description]
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* @param {number} vy - [description]
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* @param {number} width - [description]
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* @param {number} height - [description]
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* @param {number} tileX - [description]
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* @param {number} tileY - [description]
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*
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* @return {boolean} [description]
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*/
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checkDef: function (res, t, x, y, vx, vy, width, height, tileX, tileY)
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{
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var def = this.tiledef[t];
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if (!def)
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{
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return false;
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}
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var tilesize = this.tilesize;
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var lx = (tileX + def[0]) * tilesize;
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var ly = (tileY + def[1]) * tilesize;
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var lvx = (def[2] - def[0]) * tilesize;
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var lvy = (def[3] - def[1]) * tilesize;
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var solid = def[4];
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var tx = x + vx + (lvy < 0 ? width : 0) - lx;
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var ty = y + vy + (lvx > 0 ? height : 0) - ly;
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if (lvx * ty - lvy * tx > 0)
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{
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if (vx * -lvy + vy * lvx < 0)
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{
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return solid;
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}
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var length = Math.sqrt(lvx * lvx + lvy * lvy);
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var nx = lvy / length;
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var ny = -lvx / length;
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var proj = tx * nx + ty * ny;
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var px = nx * proj;
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var py = ny * proj;
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if (px * px + py * py >= vx * vx + vy * vy)
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{
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return solid || (lvx * (ty - vy) - lvy * (tx - vx) < 0.5);
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}
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res.pos.x = x + vx - px;
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res.pos.y = y + vy - py;
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res.collision.slope = { x: lvx, y: lvy, nx: nx, ny: ny };
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return true;
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}
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return false;
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}
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});
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module.exports = CollisionMap;
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