Graphic Rotating 5 Point Star - Solved

[DR White]

I am working on a simple Children's game in which I want to have a star starting small in the back of the screen and
becoming larger and rotating, to give the appearance of coming toward the student.

I have been successful in rotating a polygon with "revRotatePoly", but I cannot make a star from the polygon and therefore cannot rotate a star
(using an image does not have the quality effect that I am looking for).

Also, If possible I need to put different words in the star as it moves towards the student.

Is this possible in LiveCode?

Thanks,

David

[dave_probertGA6e24]

Hi David,

The built in graphics tools at the moment don't have an easy way of making a star shape. But they are basically polygons with specific points set in their 'points' field - so the 'easy' way to do this is via some simple Maths.

I have attached an example of a star drawing function and animation thingy. Take a look - most all of it is commented and the code is all on the card script area (except for a single line in the button).

To do the text on top you would simply add a text field and reposition/scale it at the same time as drawing the star (in the 'tickTock' function I would suggest). If you need help with that then just let me know and I can make an example for you.

Hope this helps.

Cheers,
Dave

[bn]

Hi Dave,

what a beautiful example stack.

If David wants to display text I propose he sets the label of graphic theStar to his text by script (you can not set the label of a graphic in properties inspector) and set the showName of the graphic to true. Then add this to the script in the ticToc handler

Code: Select all

 // ---- increase the star size
   put round(osize * 1.05) into osize
   put osize div 10 into tTextSize -- added bn
   set the textSize of grc "theStar" to min(max(tTextSize,10),42) -- added bn
   // ---- change the star angle

it will increase the textSize from 10 (minimum) to 42 (max) depending on the size of the star

Kind regards
Bernd

[dave_probertGA6e24]

Thankyou Bernd,

That's a nice simple addition to it for the text. I didn't know that the textsize of a label could be changed for a graphic - cool.

The only thing it would need too is this in the 'create' part in init:

Code: Select all

set the forecolor of it to 0,0,0
set the showName of it to true

Cheers,
Dave

[DR White]

Dave P,

WOW!! Your ZoomStar stack is AWESOME!!!

I Love it when someone attaches the code.

Thanks VERY MUCH,

David W

[DR White]

Bernd,

Thank you for putting the icing on the cake with the expanding text.

David W