Yertle the Turtle

[Mike Bonner]

If I recall correctly, you can SET a location now that is a fraction of a
pixel.. Keep track of the decimals as your current location and use those
numbers (within reason) as your start point, and continue onward.  (think
it was called partial pixel positioning?)  While the actual location will
be a full pixel, keeping track of the fractionals for your equations will
keep things sympatico.

On Tue, Jan 31, 2017 at 2:41 AM, Richmond Mathewson via use-livecode <
use-livecode at lists.runrev.com> wrote:

> Thanks for the equations (I had in fact already worked those out), the
> problem was
> not that, the problem is that (as far as I am aware) LiveCode cannot move
> objects
> for fractions of pixels, so a move of , say, 30 forward at 30 degrees
> might (and I haven't done
> the Maths yet) either be 29, 30 or 32 units.
>
> Whether, in the great scheme of things this is that important is not clear.
>
> Richmond.
>
>
> On 1/31/17 8:22 am, Colin Holgate via use-livecode wrote:
>
>> It is, as you said, going to need sin and cos. The X movement would be 30
>> * cos(37/180 * Pi), and the Y movement would be 30 * sin(37/180 * Pi), in
>> your example case.
>>
>>
>> On Jan 30, 2017, at 11:14 PM, Richmond Mathewson via use-livecode <
>>> use-livecode at lists.runrev.com> wrote:
>>>
>>> The problem is not with drawing the line.
>>>
>>> The problem is how, when the turtle's "nose" is pointing at, say, 37
>>> degrees from the vertical
>>> one can get it to move FORWARD for 30 units.
>>>
>>> Richmond.
>>>
>>> On 1/30/17 11:46 pm, Tore Nilsen via use-livecode wrote:
>>>
>>>> 30. jan. 2017 kl. 21.20 skrev Richmond Mathewson via use-livecode <
>>>>> use-livecode at lists.runrev.com>:
>>>>>
>>>>> 2.2. I wonder how my turtle will be seen to draw a pen line from the
>>>>> two ends of the "line".
>>>>>
>>>> If you would like the “turtle” to move to the points of the line then,
>>>> lock screen, draw the line, hide the line and unlock the screen before you
>>>> start moving the “turtle”. Then no-one will ever see the line and you can
>>>> delete last graphic once the turtle has stopped moving.
>>>>
>>>> Regards
>>>> Tore Nilsen
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