# [PD] Creating a line in Gem

Tue Dec 18 13:58:05 CET 2012

```Didn't really notice what [curve]'s argument is for. Thanks guys, I guess
that solves it.

On Tue, Dec 18, 2012 at 2:23 PM, Olivier Baudu <olivier at labomedia.net>wrote:

> Hi...
>
> A [curve 2] will give you a perfect line.
> With [cos ] and [sin ] you could "easyly" convert the angle in x, y for
> the second point...
>
> But, I'm not sure that using a rectangle, in your case, is neither so
> difficult...
> Before the rotation, you just have to translate the rectangle of the half
> of the lenght it grows.
> It's not a "trick" and works very precisely.
>
> Cheers.
>
> 01ivier
>
> Le 18.12.2012 12:46, Alexandros Drymonitis a écrit :
>
>> Hi all,
>> I've been trying to render a line in Gem, so I'm wondering if it's
>> best to use [curve] (which is actually a curve as it indicates), or
>> [rectangle] with a very small x value, so that it looks like a line.
>>  My problem is that I want to give this line an angle, so I've been
>> using [shearXY] for now. I also want to make the line grow from
>> nothing to the full desired length, but with [rectangle] it will grow
>> from the middle, so in order to make it grow from the starting point
>> to the ending point, you have to give [rectangle] a continuous x,y
>> offset.
>>  This way it's really hard to determine the starting and ending point
>> of the line. So, If for example the x,y coordinates of the starting
>> and ending point are random, then the angle and length will also be
>> random and you'll have to manipulate three different objects
>> simultaneously ([rectangle], [translate] and [shearXY]), and I'm not
>> sure if I can find the formula for all these calculations.
>>  Is there an easier technique for this?
>>
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>
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>
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