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Merge 5794c43cf9 into acb99b6f87

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Clemens Koza 2024-08-27 23:53:24 +05:30 • committed by GitHub
commit 1b99dd211b
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1 changed files with 18 additions and 14 deletions
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32
src/constraint/Constraint.js
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@ -37,7 +37,17 @@ var Common = require('../core/Common');
* @return {constraint} constraint
*/
Constraint.create = function(options) {
var constraint = options;
var defaults = {
id: Common.nextId(),
type: 'constraint',
label: 'Constraint',
damping: 0,
angularStiffness: 0,
plugin: {},
};
// NOTE: defaults are merged non-recursively, so any deep defaults must be merged separately.
var constraint = Common.extend(defaults, false, options);
// if bodies defined but no points, use body centre
if (constraint.bodyA && !constraint.pointA)
@ -49,19 +59,13 @@ var Common = require('../core/Common');
var initialPointA = constraint.bodyA ? Vector.add(constraint.bodyA.position, constraint.pointA) : constraint.pointA,
initialPointB = constraint.bodyB ? Vector.add(constraint.bodyB.position, constraint.pointB) : constraint.pointB,
length = Vector.magnitude(Vector.sub(initialPointA, initialPointB));
constraint.length = typeof constraint.length !== 'undefined' ? constraint.length : length;
// option defaults
constraint.id = constraint.id || Common.nextId();
constraint.label = constraint.label || 'Constraint';
constraint.type = 'constraint';
constraint.stiffness = constraint.stiffness || (constraint.length > 0 ? 1 : 0.7);
constraint.damping = constraint.damping || 0;
constraint.angularStiffness = constraint.angularStiffness || 0;
constraint.angleA = constraint.bodyA ? constraint.bodyA.angle : constraint.angleA;
constraint.angleB = constraint.bodyB ? constraint.bodyB.angle : constraint.angleB;
constraint.plugin = {};
// render
var render = {
@ -159,7 +163,7 @@ var Common = require('../core/Common');
Vector.rotate(pointA, bodyA.angle - constraint.angleA, pointA);
constraint.angleA = bodyA.angle;
}
// update reference angle
if (bodyB && !bodyB.isStatic) {
Vector.rotate(pointB, bodyB.angle - constraint.angleB, pointB);
@ -240,7 +244,7 @@ var Common = require('../core/Common');
// keep track of applied impulses for post solving
bodyB.constraintImpulse.x += force.x * share;
bodyB.constraintImpulse.y += force.y * share;
// apply forces
bodyB.position.x += force.x * share;
bodyB.position.y += force.y * share;
@ -279,7 +283,7 @@ var Common = require('../core/Common');
// update geometry and reset
for (var j = 0; j < body.parts.length; j++) {
var part = body.parts[j];
Vertices.translate(part.vertices, impulse);
if (j > 0) {
@ -426,7 +430,7 @@ var Common = require('../core/Common');
*/
/**
* A `String` that defines the constraint rendering type.
* A `String` that defines the constraint rendering type.
* The possible values are 'line', 'pin', 'spring'.
* An appropriate render type will be automatically chosen unless one is given in options.
*
@ -486,7 +490,7 @@ var Common = require('../core/Common');
*/
/**
* A `Number` that specifies the damping of the constraint,
* A `Number` that specifies the damping of the constraint,
* i.e. the amount of resistance applied to each body based on their velocities to limit the amount of oscillation.
* Damping will only be apparent when the constraint also has a very low `stiffness`.
* A value of `0.1` means the constraint will apply heavy damping, resulting in little to no oscillation.
@ -498,7 +502,7 @@ var Common = require('../core/Common');
*/
/**
* A `Number` that specifies the target resting length of the constraint.
* A `Number` that specifies the target resting length of the constraint.
* It is calculated automatically in `Constraint.create` from initial positions of the `constraint.bodyA` and `constraint.bodyB`.
*
* @property length