Actionscript:
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import com.actionsnippet.qbox.*;
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[SWF (backgroundColor=0xAA0000, width=700, height=600, frameRate=60)]
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var sim:QuickBox2D = new QuickBox2D(this);
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sim.createStageWalls();
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/**
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create a dancing pill
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*/
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// all x and y coords are relative to the center of the group
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var partA:QuickObject = sim.addCircle({x:-1, y:0, radius:0.5, restitution:.9});
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var partB:QuickObject = sim.addCircle({x:1, y:0, radius:0.5, restitution:.9});
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var partC:QuickObject = sim.addBox({x:0, y:0, width:2, height:1});
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// all the parts are passed into the objects array
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// addGroup() groups the parts together into one rigid body
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var pill:QuickObject = sim.addGroup({objects:[partA, partB, partC], x:3, y:3, angle:0.3});
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/**
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create another group
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*/
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partA = sim.addCircle({x:0, y:0, radius:1});
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partB = sim.addBox({x:0, y:1, width:1, height:1, fillColor:0x666666});
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partC = sim.addBox({x:0, y:-1, width:1, height:1, fillColor:0x666666});
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sim.addGroup({objects:[partA, partB, partC], x:8, y:3, angle:0.3});
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/**
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create two circles linked together by a stretchy joint
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*/
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partA = sim.addCircle({x:15, y:3, fillColor:0x000000, anglularDamping:1});
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partB = sim.addCircle({x:17, y:3, fillColor:0xFFFFFF, anglularDamping:1});
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// if x1, y1, x2 and y2 properties are not set, the joint is automatically placed
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// at the b2Body's center
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sim.addJoint({a:partA.body, b:partB.body, frequencyHz:1});
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sim.start();
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sim.mouseDrag();
You'll need QuickBox2D Alpha 106 to run this... This snippet demo's the addGroup() method, which allows for easy grouping of shapes. I updated the docs today to feature a simple explanation of how this works.
Have a look at the swf here...
One Comment
Hello.
I’m trying to use this methods (addGroup) but i’m wondering how many quickobject can we put in it.
I’ve tried to make a bridge with a lot of box and joint and it don’t works.
Really thank you for QuickBox2D. It’s awesome. Sorry for my english.
2 Trackbacks
[...] GroupとJointの使い方とかFRIM、任意の形を三角ポリゴンに分けてオブジェクトを作る、表示オブジェクトを切り替えるなどなど、おもしろい機能がたくさんあるので僕の勉強がてら書いていきます。 [...]
[...] addGroupによるオブジェクトのグループ化 – QuickBox2D Groups [...]