dynamic shapes....please please please....

Solar2D Advanced Graphics
#1

is there a way to access and change the vertices on a shape object after creation?

with the cool new fill/paint stuff this would be really useful…  :)

cheers

andy

#2

The amazing horacybury created a nice utility for this functionality in the Code Exchange:

http://developer.coronalabs.com/code/body-modification

#3

thanks , this isn’t quite what i mean though

not necessarily changing a physics object, but the shape object itself…

ie . create a polygon or multiline, then fill it with a pattern, then animate the vertices.

for example, to create a lightning bolt i would draw a line and append more verts to it, then on each subsequent frame add random movement to the vertices. 

#4

Hmm… so you aren’t looking to changing the shape after creation, but changing a shape. 

You might want to check out png2box2d. I don’t know how much documentation there is on it, but I think it might be what you’re looking for. Here’s a blog post on it from someone else’s blog:

http://www.emanueleferonato.com/2013/03/13/from-png-to-box2d-first-attempt/

#5

Hi @punyroboto,

At this time, it’s not possible to change/move individual vertices after creating the shape. For this, you’d need to remove the current shape and re-draw it.

The feature that @Panc mentioned (PngToBox2D) is more specific to physics objects, being that it traces a PNG image (in regards to its transparent pixels) and creates a table of vertices for that object, which you can then use to create a complex physics body. But, I don’t think that’s the functionality you’re looking for in this case.

Best regards,

Brent

#6

Man, I’ve been striking out all over the forums these days!

#7

@panc i need to be more careful in the phrasing of my questions :slight_smile:

thanks Brent

#8

The amazing horacybury created a nice utility for this functionality in the Code Exchange:

http://developer.coronalabs.com/code/body-modification

#9

thanks , this isn’t quite what i mean though

not necessarily changing a physics object, but the shape object itself…

ie . create a polygon or multiline, then fill it with a pattern, then animate the vertices.

for example, to create a lightning bolt i would draw a line and append more verts to it, then on each subsequent frame add random movement to the vertices. 

#10

Hmm… so you aren’t looking to changing the shape after creation, but changing a shape. 

You might want to check out png2box2d. I don’t know how much documentation there is on it, but I think it might be what you’re looking for. Here’s a blog post on it from someone else’s blog:

http://www.emanueleferonato.com/2013/03/13/from-png-to-box2d-first-attempt/

#11

Hi @punyroboto,

At this time, it’s not possible to change/move individual vertices after creating the shape. For this, you’d need to remove the current shape and re-draw it.

The feature that @Panc mentioned (PngToBox2D) is more specific to physics objects, being that it traces a PNG image (in regards to its transparent pixels) and creates a table of vertices for that object, which you can then use to create a complex physics body. But, I don’t think that’s the functionality you’re looking for in this case.

Best regards,

Brent

#12

Man, I’ve been striking out all over the forums these days!

#13

@panc i need to be more careful in the phrasing of my questions :slight_smile:

thanks Brent