mirror of
https://github.com/wassname/phaser.git
synced 2026-09-11 12:31:29 +08:00
Sorted out the bounds for when sprites are in trimmed texture atlases to stop the physics checks going insane. Also bundled in Advanced Physics lib, although not hooked up yet.
This commit is contained in:
Richard Davey
@@ -0,0 +1,402 @@
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/*
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* Copyright (c) 2012 Ju Hyung Lee
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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* and associated documentation files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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Body = function(type, pos, angle) {
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if (Body.id_counter == undefined) {
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Body.id_counter = 0;
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}
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this.id = Body.id_counter++;
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// Identifier
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this.name = "body" + this.id;
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// STATIC or DYNAMIC
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this.type = type;
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// Default values
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pos = pos || new vec2(0, 0);
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angle = angle || 0;
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// Local to world transform
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this.xf = new Transform(pos, angle);
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// Local center of mass
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this.centroid = new vec2(0, 0);
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// World position of centroid
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this.p = new vec2(pos.x, pos.y);
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// Velocity
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this.v = new vec2(0, 0);
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// Force
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this.f = new vec2(0, 0);
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// Orientation (angle)
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this.a = angle;
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// Angular velocity
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this.w = 0;
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// Torque
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this.t = 0;
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// Linear damping
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this.linearDamping = 0;
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// Angular damping
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this.angularDamping = 0;
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// Sleep time
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this.sleepTime = 0;
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// Awaked flag
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this.awaked = false;
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// Shape list for this body
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this.shapeArr = [];
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// Joint hash for this body
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this.jointArr = [];
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this.jointHash = {};
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// Bounds of all shapes
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this.bounds = new Bounds;
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this.fixedRotation = false;
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this.categoryBits = 0x0001;
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this.maskBits = 0xFFFF;
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this.stepCount = 0;
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}
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Body.STATIC = 0;
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Body.KINETIC = 1;
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Body.DYNAMIC = 2;
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Body.prototype.duplicate = function() {
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var body = new Body(this.type, this.xf.t, this.a);
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for (var i = 0; i < this.shapeArr.length; i++) {
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body.addShape(this.shapeArr[i].duplicate());
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}
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body.resetMassData();
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return body;
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}
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Body.prototype.serialize = function() {
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var shapes = [];
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for (var i = 0; i < this.shapeArr.length; i++) {
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var obj = this.shapeArr[i].serialize();
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shapes.push(obj);
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}
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return {
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"type": ["static", "kinetic", "dynamic"][this.type],
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"name": this.name,
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"position": this.xf.t,
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"angle": this.xf.a,
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"shapes": shapes
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};
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}
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Body.prototype.toString = function() {
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return "[{Body (name=" + this.name + " velocity=" + this.v.toString() + " angularVelocity: " + this.w + ")}]";
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}
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Body.prototype.isStatic = function() {
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return this.type == Body.STATIC ? true : false;
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}
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Body.prototype.isDynamic = function() {
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return this.type == Body.DYNAMIC ? true : false;
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}
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Body.prototype.isKinetic = function() {
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return this.type == Body.KINETIC ? true : false;
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}
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Body.prototype.setType = function(type) {
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if (type == this.type) {
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return;
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}
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this.f.set(0, 0);
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this.v.set(0, 0);
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this.t = 0;
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this.w = 0;
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this.type = type;
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this.awake(true);
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}
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Body.prototype.addShape = function(shape) {
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shape.body = this;
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this.shapeArr.push(shape);
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}
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Body.prototype.removeShape = function(shape) {
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var index = this.shapeArr.indexOf(shape);
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if (index != -1) {
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this.shapeArr.splice(index, 1);
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shape.body = undefined;
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}
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}
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// Internal function
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Body.prototype.setMass = function(mass) {
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this.m = mass;
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this.m_inv = mass > 0 ? 1 / mass : 0;
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}
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// Internal function
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Body.prototype.setInertia = function(inertia) {
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this.i = inertia;
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this.i_inv = inertia > 0 ? 1 / inertia : 0;
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}
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Body.prototype.setTransform = function(pos, angle) {
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this.xf.set(pos, angle);
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this.p = this.xf.transform(this.centroid);
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this.a = angle;
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}
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Body.prototype.syncTransform = function() {
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this.xf.setRotation(this.a);
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this.xf.setPosition(vec2.sub(this.p, this.xf.rotate(this.centroid)));
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}
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Body.prototype.getWorldPoint = function(p) {
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return this.xf.transform(p);
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}
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Body.prototype.getWorldVector = function(v) {
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return this.xf.rotate(v);
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}
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Body.prototype.getLocalPoint = function(p) {
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return this.xf.untransform(p);
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}
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Body.prototype.getLocalVector = function(v) {
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return this.xf.unrotate(v);
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}
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Body.prototype.setFixedRotation = function(flag) {
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this.fixedRotation = flag;
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this.resetMassData();
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}
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Body.prototype.resetMassData = function() {
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this.centroid.set(0, 0);
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this.m = 0;
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this.m_inv = 0;
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this.i = 0;
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this.i_inv = 0;
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if (!this.isDynamic()) {
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this.p = this.xf.transform(this.centroid);
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return;
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}
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var totalMassCentroid = new vec2(0, 0);
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var totalMass = 0;
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var totalInertia = 0;
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for (var i = 0; i < this.shapeArr.length; i++) {
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var shape = this.shapeArr[i];
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var centroid = shape.centroid();
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var mass = shape.area() * shape.density;
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var inertia = shape.inertia(mass);
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totalMassCentroid.mad(centroid, mass);
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totalMass += mass;
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totalInertia += inertia;
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}
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this.centroid.copy(vec2.scale(totalMassCentroid, 1 / totalMass));
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this.setMass(totalMass);
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if (!this.fixedRotation) {
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this.setInertia(totalInertia - totalMass * vec2.dot(this.centroid, this.centroid));
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}
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// Move center of mass
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var old_p = this.p;
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this.p = this.xf.transform(this.centroid);
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// Update center of mass velocity ??
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this.v.mad(vec2.perp(vec2.sub(this.p, old_p)), this.w);
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}
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Body.prototype.resetJointAnchors = function() {
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for (var i = 0; i < this.jointArr.length; i++) {
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var joint = this.jointArr[i];
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if (!joint) {
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continue;
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}
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var anchor1 = joint.getWorldAnchor1();
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var anchor2 = joint.getWorldAnchor2();
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joint.setWorldAnchor1(anchor1);
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joint.setWorldAnchor2(anchor2);
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}
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}
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Body.prototype.cacheData = function() {
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this.bounds.clear();
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for (var i = 0; i < this.shapeArr.length; i++) {
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var shape = this.shapeArr[i];
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shape.cacheData(this.xf);
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this.bounds.addBounds(shape.bounds);
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}
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}
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Body.prototype.updateVelocity = function(gravity, dt, damping) {
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this.v = vec2.mad(this.v, vec2.mad(gravity, this.f, this.m_inv), dt);
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this.w = this.w + this.t * this.i_inv * dt;
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// Apply damping.
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// ODE: dv/dt + c * v = 0
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// Solution: v(t) = v0 * exp(-c * t)
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// Time step: v(t + dt) = v0 * exp(-c * (t + dt)) = v0 * exp(-c * t) * exp(-c * dt) = v * exp(-c * dt)
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// v2 = exp(-c * dt) * v1
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// Taylor expansion:
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// v2 = (1.0f - c * dt) * v1
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this.v.scale(Math.clamp(1 - dt * (damping + this.linearDamping), 0, 1));
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this.w *= Math.clamp(1 - dt * (damping + this.angularDamping), 0, 1);
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this.f.set(0, 0);
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this.t = 0;
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}
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Body.prototype.updatePosition = function(dt) {
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this.p.addself(vec2.scale(this.v, dt));
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this.a += this.w * dt;
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}
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Body.prototype.resetForce = function() {
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this.f.set(0, 0);
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this.t = 0;
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}
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Body.prototype.applyForce = function(force, p) {
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if (!this.isDynamic())
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return;
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if (!this.isAwake())
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this.awake(true);
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this.f.addself(force);
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this.t += vec2.cross(vec2.sub(p, this.p), force);
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}
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Body.prototype.applyForceToCenter = function(force) {
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if (!this.isDynamic())
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return;
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if (!this.isAwake())
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this.awake(true);
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this.f.addself(force);
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}
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Body.prototype.applyTorque = function(torque) {
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if (!this.isDynamic())
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return;
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if (!this.isAwake())
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this.awake(true);
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this.t += torque;
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}
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Body.prototype.applyLinearImpulse = function(impulse, p) {
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if (!this.isDynamic())
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return;
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if (!this.isAwake())
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this.awake(true);
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this.v.mad(impulse, this.m_inv);
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this.w += vec2.cross(vec2.sub(p, this.p), impulse) * this.i_inv;
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}
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Body.prototype.applyAngularImpulse = function(impulse) {
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if (!this.isDynamic())
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return;
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if (!this.isAwake())
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this.awake(true);
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this.w += impulse * this.i_inv;
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}
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Body.prototype.kineticEnergy = function() {
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var vsq = this.v.dot(this.v);
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var wsq = this.w * this.w;
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return 0.5 * (this.m * vsq + this.i * wsq);
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}
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Body.prototype.isAwake = function() {
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return this.awaked;
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}
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Body.prototype.awake = function(flag) {
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this.awaked = flag;
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if (flag) {
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this.sleepTime = 0;
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}
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else {
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this.v.set(0, 0);
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this.w = 0;
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this.f.set(0, 0);
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this.t = 0;
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}
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}
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Body.prototype.isCollidable = function(other) {
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if (this == other)
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return false;
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if (!this.isDynamic() && !other.isDynamic())
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return false;
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if (!(this.maskBits & other.categoryBits) || !(other.maskBits & this.categoryBits))
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return false;
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for (var i = 0; i < this.jointArr.length; i++) {
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var joint = this.jointArr[i];
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if (!joint) {
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continue;
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}
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if (!joint.collideConnected && other.jointHash[joint.id] != undefined) {
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return false;
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}
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}
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return true;
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}
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Block a user