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implemented static compound bodies

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liabru 2015-02-28 16:58:00 +00:00
parent 6a26696fc7
commit 90adf147e9
1 changed files with 20 additions and 15 deletions
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33
src/body/Body.js
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@ -213,21 +213,24 @@ var Body = {};
* @param {bool} isStatic
*/
Body.setStatic = function(body, isStatic) {
body.isStatic = isStatic;
for (var i = 0; i < body.parts.length; i++) {
var part = body.parts[i];
part.isStatic = isStatic;
if (isStatic) {
body.restitution = 0;
body.friction = 1;
body.mass = body.inertia = body.density = Infinity;
body.inverseMass = body.inverseInertia = 0;
part.restitution = 0;
part.friction = 1;
part.mass = part.inertia = part.density = Infinity;
part.inverseMass = part.inverseInertia = 0;
body.positionPrev.x = body.position.x;
body.positionPrev.y = body.position.y;
body.anglePrev = body.angle;
body.angularVelocity = 0;
body.speed = 0;
body.angularSpeed = 0;
body.motion = 0;
part.positionPrev.x = part.position.x;
part.positionPrev.y = part.position.y;
part.anglePrev = part.angle;
part.angularVelocity = 0;
part.speed = 0;
part.angularSpeed = 0;
part.motion = 0;
}
}
};
@ -589,10 +592,12 @@ var Body = {};
properties.mass += part.mass;
properties.area += part.area;
properties.inertia += part.inertia;
properties.centre = Vector.add(properties.centre, Vector.mult(part.position, part.mass));
properties.centre = Vector.add(properties.centre,
Vector.mult(part.position, part.mass !== Infinity ? part.mass : 1));
}
properties.centre = Vector.div(properties.centre, properties.mass);
properties.centre = Vector.div(properties.centre,
properties.mass !== Infinity ? properties.mass : body.parts.length);
return properties;
};