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how to draw polygon in EJSS models? post and replies

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how to draw polygon in EJSS models?
lookang Avatar
lookang
222 Posts

dear EJS community,

how to draw polygon in EJSS models?




previously in EJS,
X Data = new double[] {-0.5, 0.5, 0}
Y Data = new double[] {0.0, 0.0, 1.0}

but in in EJSS, how do i define the points of the polygon?

Post edited September 24, 2013 at 3:39 AM EST.

Attached File: ejss_src_rockettemplatelookang.zip


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Replies to how to draw polygon in EJSS models?

Re: how to draw polygon in EJSS models? -
Francisco Esquembre
228 Posts

Define a double [3][2] array with the value:

[[-0.5,0.0],[0.5,0.0],[0.0,1.0]]

and then link it to the Points property of the polygon.

Or write the array directly into the Points property (if it is going to be constant).

Paco



Re: Re: how to draw polygon in EJSS models? -
lookang Avatar
lookang
222 Posts

awesome!
it works beautifully.

attached is my attempt on Prof Larry's Rocket Model Template.

i will be trying this out with about 10-20 grade 9 students in November 2013 http://www.hillgrovesec.moe.edu.sg/

Wohoo!
it will be fun :)

Attached File: ejss_model_rockettemplatelookang.zip


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Re: how to draw polygon in EJSS models? -
Wolfgang
146 Posts

The Half Atwood Machine JavaScript model uses a polygon.

http://www.compadre.org/osp/items/detail.cfm?ID=12976



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