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class="class-depth-1"><a href="https://www.codeandweb.com/texturepacker/phaser">Texture Packer</a></li> </ul> </li> </ul> </div> </div> <div class="row-fluid"> <div class="span12"> <div id="main"> <h1 class="page-title">Source: src/physics/ninja/Circle.js</h1> <section> <article> <pre class="sunlight-highlight-javascript linenums">/* jshint camelcase: false */ /** * @author Richard Davey <rich@photonstorm.com> * @copyright 2016 Photon Storm Ltd. * @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License} */ /** * Ninja Physics Circle constructor. * Note: This class could be massively optimised and reduced in size. I leave that challenge up to you. * * @class Phaser.Physics.Ninja.Circle * @constructor * @param {Phaser.Physics.Ninja.Body} body - The body that owns this shape. * @param {number} x - The x coordinate to create this shape at. * @param {number} y - The y coordinate to create this shape at. * @param {number} radius - The radius of this Circle. */ Phaser.Physics.Ninja.Circle = function (body, x, y, radius) { /** * @property {Phaser.Physics.Ninja.Body} system - A reference to the body that owns this shape. */ this.body = body; /** * @property {Phaser.Physics.Ninja} system - A reference to the physics system. */ this.system = body.system; /** * @property {Phaser.Point} pos - The position of this object. */ this.pos = new Phaser.Point(x, y); /** * @property {Phaser.Point} oldpos - The position of this object in the previous update. */ this.oldpos = new Phaser.Point(x, y); /** * @property {number} radius - The radius of this circle shape. */ this.radius = radius; /** * @property {number} xw - Half the width. * @readonly */ this.xw = radius; /** * @property {number} xw - Half the height. * @readonly */ this.yw = radius; /** * @property {number} width - The width. * @readonly */ this.width = radius * 2; /** * @property {number} height - The height. * @readonly */ this.height = radius * 2; /** * @property {number} oH - Internal var. * @private */ this.oH = 0; /** * @property {number} oV - Internal var. * @private */ this.oV = 0; /** * @property {Phaser.Point} velocity - The velocity of this object. */ this.velocity = new Phaser.Point(); /** * @property {object} circleTileProjections - All of the collision response handlers. */ this.circleTileProjections = {}; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_FULL] = this.projCircle_Full; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_45DEG] = this.projCircle_45Deg; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_CONCAVE] = this.projCircle_Concave; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_CONVEX] = this.projCircle_Convex; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_22DEGs] = this.projCircle_22DegS; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_22DEGb] = this.projCircle_22DegB; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_67DEGs] = this.projCircle_67DegS; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_67DEGb] = this.projCircle_67DegB; this.circleTileProjections[Phaser.Physics.Ninja.Tile.TYPE_HALF] = this.projCircle_Half; }; Phaser.Physics.Ninja.Circle.prototype.constructor = Phaser.Physics.Ninja.Circle; Phaser.Physics.Ninja.Circle.COL_NONE = 0; Phaser.Physics.Ninja.Circle.COL_AXIS = 1; Phaser.Physics.Ninja.Circle.COL_OTHER = 2; Phaser.Physics.Ninja.Circle.prototype = { /** * Updates this Circles position. * * @method Phaser.Physics.Ninja.Circle#integrate */ integrate: function () { var px = this.pos.x; var py = this.pos.y; // integrate this.pos.x += (this.body.drag * this.pos.x) - (this.body.drag * this.oldpos.x); this.pos.y += (this.body.drag * this.pos.y) - (this.body.drag * this.oldpos.y) + (this.system.gravity * this.body.gravityScale); // store this.velocity.set(this.pos.x - px, this.pos.y - py); this.oldpos.set(px, py); }, /** * Process a world collision and apply the resulting forces. * * @method Phaser.Physics.Ninja.Circle#reportCollisionVsWorld * @param {number} px - The tangent velocity * @param {number} py - The tangent velocity * @param {number} dx - Collision normal * @param {number} dy - Collision normal * @param {number} obj - Object this Circle collided with */ reportCollisionVsWorld: function (px, py, dx, dy) { var p = this.pos; var o = this.oldpos; // Calc velocity var vx = p.x - o.x; var vy = p.y - o.y; // Find component of velocity parallel to collision normal var dp = (vx * dx + vy * dy); var nx = dp * dx; //project velocity onto collision normal var ny = dp * dy; //nx,ny is normal velocity var tx = vx - nx; //px,py is tangent velocity var ty = vy - ny; // We only want to apply collision response forces if the object is travelling into, and not out of, the collision var b, bx, by, fx, fy; if (dp < 0) { fx = tx * this.body.friction; fy = ty * this.body.friction; b = 1 + this.body.bounce; bx = (nx * b); by = (ny * b); if (dx === 1) { this.body.touching.left = true; } else if (dx === -1) { this.body.touching.right = true; } if (dy === 1) { this.body.touching.up = true; } else if (dy === -1) { this.body.touching.down = true; } } else { // Moving out of collision, do not apply forces bx = by = fx = fy = 0; } // Project object out of collision p.x += px; p.y += py; // Apply bounce+friction impulses which alter velocity o.x += px + bx + fx; o.y += py + by + fy; }, /** * Collides this Circle against the world bounds. * * @method Phaser.Physics.Ninja.Circle#collideWorldBounds */ collideWorldBounds: function () { var dx = this.system.bounds.x - (this.pos.x - this.radius); if (0 < dx) { this.reportCollisionVsWorld(dx, 0, 1, 0, null); } else { dx = (this.pos.x + this.radius) - this.system.bounds.right; if (0 < dx) { this.reportCollisionVsWorld(-dx, 0, -1, 0, null); } } var dy = this.system.bounds.y - (this.pos.y - this.radius); if (0 < dy) { this.reportCollisionVsWorld(0, dy, 0, 1, null); } else { dy = (this.pos.y + this.radius) - this.system.bounds.bottom; if (0 < dy) { this.reportCollisionVsWorld(0, -dy, 0, -1, null); } } }, /** * Collides this Circle with a Tile. * * @method Phaser.Physics.Ninja.Circle#collideCircleVsTile * @param {Phaser.Physics.Ninja.Tile} t - The Tile involved in the collision. * @return {boolean} True if they collide, otherwise false. */ collideCircleVsTile: function (tile) { var pos = this.pos; var r = this.radius; var c = tile; var tx = c.pos.x; var ty = c.pos.y; var txw = c.xw; var tyw = c.yw; var dx = pos.x - tx; // tile->obj delta var px = (txw + r) - Math.abs(dx); // penetration depth in x if (0 < px) { var dy = pos.y - ty; // tile->obj delta var py = (tyw + r) - Math.abs(dy); // pen depth in y if (0 < py) { // object may be colliding with tile // determine grid/voronoi region of circle center this.oH = 0; this.oV = 0; if (dx < -txw) { // circle is on left side of tile this.oH = -1; } else if (txw < dx) { // circle is on right side of tile this.oH = 1; } if (dy < -tyw) { // circle is on top side of tile this.oV = -1; } else if (tyw < dy) { // circle is on bottom side of tile this.oV = 1; } return this.resolveCircleTile(px, py, this.oH, this.oV, this, c); } } }, /** * Resolves tile collision. * * @method Phaser.Physics.Ninja.Circle#resolveCircleTile * @param {number} x - Penetration depth on the x axis. * @param {number} y - Penetration depth on the y axis. * @param {number} oH - Grid / voronoi region. * @param {number} oV - Grid / voronoi region. * @param {Phaser.Physics.Ninja.Circle} obj - The Circle involved in the collision. * @param {Phaser.Physics.Ninja.Tile} t - The Tile involved in the collision. * @return {number} The result of the collision. */ resolveCircleTile: function (x, y, oH, oV, obj, t) { if (0 < t.id) { return this.circleTileProjections[t.type](x, y, oH, oV, obj, t); } else { return false; } }, /** * Resolves Full tile collision. * * @method Phaser.Physics.Ninja.Circle#projCircle_Full * @param {number} x - Penetration depth on the x axis. * @param {number} y - Penetration depth on the y axis. * @param {number} oH - Grid / voronoi region. * @param {number} oV - Grid / voronoi region. * @param {Phaser.Physics.Ninja.Circle} obj - The Circle involved in the collision. * @param {Phaser.Physics.Ninja.Tile} t - The Tile involved in the collision. * @return {number} The result of the collision. */ projCircle_Full: function (x, y, oH, oV, obj, t) { //if we're colliding vs. the current cell, we need to project along the //smallest penetration vector. //if we're colliding vs. horiz. or vert. neighb, we simply project horiz/vert //if we're colliding diagonally, we need to collide vs. tile corner if (oH === 0) { if (oV === 0) { //collision with current cell if (x < y) { //penetration in x is smaller; project in x var dx = obj.pos.x - t.pos.x;//get sign for projection along x-axis //NOTE: should we handle the delta === 0 case?! and how? (project towards oldpos?) if (dx < 0) { obj.reportCollisionVsWorld(-x, 0, -1, 0, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } else { obj.reportCollisionVsWorld(x, 0, 1, 0, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } } else { //penetration in y is smaller; project in y var dy = obj.pos.y - t.pos.y;//get sign for projection along y-axis //NOTE: should we handle the delta === 0 case?! and how? (project towards oldpos?) if (dy < 0) { obj.reportCollisionVsWorld(0, -y, 0, -1, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } else { obj.reportCollisionVsWorld(0, y, 0, 1, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } } } else { //collision with vertical neighbor obj.reportCollisionVsWorld(0, y * oV, 0, oV, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } } else if (oV === 0) { //collision with horizontal neighbor obj.reportCollisionVsWorld(x * oH, 0, oH, 0, t); return Phaser.Physics.Ninja.Circle.COL_AXIS; } else { //diagonal collision //get diag vertex position var vx = t.pos.x + (oH * t.xw); var vy = t.pos.y + (oV * t.yw); var dx = obj.pos.x - vx;//calc vert->circle vector var dy = obj.pos.y - vy; var len = Math.sqrt(dx * dx + dy * dy); var pen = obj.radius - len; if (0 < pen) { //vertex is in the circle; project outward if (len === 0) { //project out by 45deg dx = oH / Math.SQRT2; dy = oV / Math.SQRT2; } else { dx /= len; dy /= len; } obj.reportCollisionVsWorld(dx * pen, dy * pen, dx, dy, t); return Phaser.Physics.Ninja.Circle.COL_OTHER; } }