Spraycan Paint Script, surfaces! Options

[Sonica2]

Spaycans basically lay down random pixels around the mouse cursor, so that is what YOU do!

Then make a script and call it scr_getrandom
and give it this code:

CODE

length = random(10)//10 is the range, it is in beween this range
dir = random(360)//the degrees (up to 360)
posx = mouse_x+lengthdir_x(length,dir)//get the position
posy = mouse_y+lengthdir_y(length,dir)//get the position

Nice! This will make a random dot around the mouse with a range of 10!

make an object called obj_spraycan
in the create event put:

CODE

posx=mouse_x//starting x
posy=mouse_y//starting y
surface = surface_create(window_get_width(),window_get_height())//create the surface
surface_set_target(surface)//make sure we are drawing ON the surface

and in the step event put:

CODE

if mouse_check_button(mb_left)
{
surface_set_target(surface);
repeat (2)
{
  scr_getrandom();//get a random position IN A CIRCLE (see the script, thanks to Prenn Saranda)
  draw_point(posx,posy);//draw the point
  surface_reset_target();//resetting
}
}
else
{
surface_reset_target();//reset it
}

and in the draw event put:

CODE

draw_surface(surface,0,0);

This will create a lovely rich spray around the mouse! You can use any colour, and any range (change the range in the script, first line).

I hope this helps people xD

EDIT:

Oh yes and put obj_spraycan in a room with a white bg ;D

This post has been edited by Sonica2: Yesterday, 12:56 PM

[Sonica2]

I will make it much faster, I just realised it uses millions of instances.

This post has been edited by Sonica2: Nov 20 2009, 08:48 AM

[vadim647]

I would replace the content of first code with repeat(n).

[Sven]

Definitely not efficient. However it is a good place to start.
Another way of accomplishing this which you may find useful. Is to store the x and y coordinates of the spray image in an array. You can then loop through the array and draw them all. That makes it much faster.

You can find an example of what I'm talking about here: Download
This example uses lines instead, but the key concepts are the same.

[vadim647]

Definitely not efficient. However it is a good place to start.
Another way of accomplishing this which you may find useful. Is to store the x and y coordinates of the spray image in an array. You can then loop through the array and draw them all. That makes it much faster.

You can find an example of what I'm talking about here: Download
This example uses lines instead, but the key concepts are the same.

calling draw_point function 480000 times is not a smart plan too, in my opinion.

[Sonica2]

The more I think about it, the more I think not to keep this topic.....

[LumiéreDuSoleil]

Holy !^%*.

CODE

// arg0: volume
// arg1: radius
repeat argument0 draw_point(mouse_x+random(2*argument1)-argument1,mouse_y+random(2*argument1)-argument1);

This post has been edited by LumiéreDuSoleil: Nov 6 2009, 10:37 PM

[Sven]

calling draw_point function 480000 times is not a smart plan too, in my opinion.

It's not that smart, draw_point() is rather slow which is why I suggested he use a sprite and draw it through a loop. Basically anything is faster at this point as there is a large amount of instances and each of them is calling draw_point() which is combining 2 slow methods. This is much slower than either instances with 1x1 sprites (Supports around 11,000 instances on my system) or a drawing loop with draw_point() which supports 6,000 instances on my system.

So at this point, mostly anything is an improvement.

The more I think about it, the more I think not to keep this topic.....

That is not the attitude to have.
You should use these ideas to try and make simple yet more efficient example. It will not only improve your skills but may also prove to be useful to the community

This post has been edited by Sven: Nov 6 2009, 11:41 PM

[Shadow Link]

The more I think about it, the more I think not to keep this topic.....

That is not the attitude to have.
You should use these ideas to try and make simple yet more efficient example. It will not only improve your skills but may also prove to be useful to the community

I agree. If anything, this can be useful for something like blood spatter, or a brief moment of confetti. The randomness will make the graphics less monotonous.

[Sonica2]

Ok people! I am creating better example, so wait fr a bit>>>>

[NYS]

Why don't we just use surfaces and do something like this:

CODE

draw_point(mouse_x+choose(random(-10),random(10)),mouse_y+choose(random(-10),random(10)));

It doesn't have to be in the draw event since we're using a surface =D

This post has been edited by NYS: Nov 7 2009, 02:51 PM

[Prenn Saranda]

Hey, I have another thing to add to this topic

if the position is chosen with:

CODE

posx = mouse_x+random(r)-(2r)          (or posx = mouse_x+choose(random(-r),random(r)))
posy = mouse_y+random(r)-(2r)          (or posy = mouse_y+choose(random(-r),random(r)))
(were r should be the max radius)

Like it is done in this topic, the spraycan will spray squared. To change this, use something like:

CODE

length = random(r)
dir = random(360)
posx = mouse_x+lengthdir_x(length,dir)
posy = mouse_y+lengthdir_y(length,dir)

This will make it spray in a circle instead

Of course, if you want it to be squared, or I am wrong, ignore my post

[Sonica2]

No, circle is good

[Sonica2]

NEW EXAMPLE!

This post has been edited by Sonica2: Nov 19 2009, 05:33 PM

[Sonica2]

Please People! It uses surfaces now!