Destroy Objects Parts?

Hi,

for my platform game, i want a solid sprite when hit by a bullet to lose a radius of the (image) area. it should be able to get destroyed. This loss should not only result in a new image, but also a new collision polygon, everytime this event occours.

Can i currently handle such complex object changes with c2 during runtime?

Thanks and best regards :)

No i am afraid this is not possible. There is no way to detect where the bullet hits the sprite for a start.

Also as far as i am aware it is not possible to create a new collision polygon on the fly either.

You could create a sprite with multiple frames, each with its own collision polygon. But the shapes would be pre-set and would not reflect the point of collision with the bullet.

Worms style destructible terrain/objects right? I'd be interested to see if anyone could come up with a solution.

Here is something i have been playing around with for a while.

dl.dropbox.com/u/1685424/index.html

Made to run in Chrome.

ere is something i have been playing around with for a while.

http://dl.dropbox.com/u/1685424/index.html

Made to run in Chrome.

yeah, this is getting in the right direction. would you share the capx with us?

It may help.

http://www.scirra.com/tutorials/361/understanding-uid-iid-health-cards-and-rocket-smoke-trail

http://www.scirra.com/tutorials/355/making-character-composed-of-multiple-parts

I will have a think about it. I would need to tidy it up and add some comments to make it more accessible.

You can do it visually using masking. However, collision polygons will be a different matter. I don't see of any good way to go about getting collision to work in this respect.

I have some ideas 'bout this ... I could work on it ... Well , Tuning In !

Something I can say is that it's not impossible , I'll need to create a event-based collision system using points and lines

—, would a mix of that and collision conditions "Object overlaps Ground & Object NOT overlaps Mask" work? Maybe something where you give the mask object a collision polygon such that the player only collides with it when they are near its center/one edge (and angle the mask so that it's always at the angle of the bullet that collided?).

Kind of hard to explain so I will create a small example file

Edit: Here's an example of basic destructible terrain, you can use image masking as Squiddster said to show the true background I think (maybe using the canvas object?): Sprite terrain erase/destructible terrain example

Double edit: R0J0's canvas plugin is a better way to do it, but until plugins are available on the arcade you can use this method above.

The canvas plugin can be used to do per pixel collisions on top of being designed to do the visual portion.

http://dl.dropbox.com/u/5426011/examples16/destroy_ball.capx

R0J0hound oh sweet I didn't realize, thanks R0J0! <img src="smileys/smiley4.gif" border="0" align="middle" />

R0J0hound

could you explain what test.AsJSON is ?

I can see its put into the array but i dont understand where the data comes from.

Is there any information about the canvas plugin anywhere. <img src="smileys/smiley1.gif" border="0" align="middle" />

scirra.com/forum/plugin-canvas_topic46006.html

i guess the array is to save the temp object form, and to read the new "collision mask" after bullet overlap.

thanks rojo, this is a good solution; but should be better integrated into c2.

currently got no idea, how to use this in combination with the solid behaviour in a platformer.

dl.dropbox.com/u/54216429/destroy_ball_demo.capx

any suggestions still welcome <img src="smileys/smiley1.gif" border="0" align="middle" />

spongehammer

The canvas topic has most of the info about the plugin.

The .ASJSON expression is all the pixel data (red,green,blue,alpha in the range of 0-255) of all the pixels in a format that can be simply loaded into an array object.

A bit of a discription of it's use:http://www.scirra.com/forum/using-pixel-colors-as-reference-for-level-layouts_topic57020_post355255.html?KW=AsJSON#355255

xeed

It's tricky to make the behaviors work with per pixel collisions.

Here I got it working with the 8direction behavior by moving the object back to it's last collision free location and setting the object speed to 0.

For the platform behavior the best method would be to create invisible solid walls only immediately around the player. That gives the behavior something to respond to.

Here is a example that creates a platform if pixels are in range:

http://dl.dropbox.com/u/5426011/examples16/destroy_ball_with_platform.capx

I increased the size of the test object to increase the sampling area, but it also slows everything a bit.