rotaion of a falling body in box2D -


i try build tower brick game (there falling shapes sky , should make tower) when drop shapes physics doesnt work , if on top each other on corner not fall.... how can fix it?

here shape:

var fixdef = new b2fixturedef;//shape 1             fixdef.shape = new b2polygonshape;             fixdef.density = 0;             fixdef.friction = 0.5;             fixdef.restitution = 0.5;               fixdef.shape.setasarray([                 new b2vec2(-1, 0),                 new b2vec2(0, -1),                 new b2vec2(1, 0)],3             );               bodydef.type = b2body.b2_dynamicbody;                 bodydef.position.set(24.5/30, 60/30);                        bodydef.userdata = new traingle();             addchild(bodydef.userdata);             world.createbody(bodydef).createfixture(fixdef);

and here world:

i think that's because you've set density zero. impact should zero-weight body make?


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