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yay, firts post in advance, well anyway, i need to know how to erase something drawn by a canvas.

in the create event i do this:

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setpen(0, 255, 255, 0, 4);

and in draw actor:

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moveto(0, 0);
lineto(width-1+HP1-28, 0);

what do i do when the HP1 decreases so it lower the bar?(erasing the rest of the bar, and if possible, make it fade out!!)

thx in advence to all!

In draw actor, set it check if the health has changed. Create a variable called prevHealth.

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if (HP1 > prevHealth)
{
    moveto(0, 0);
    lineto(width-1+HP1-28, 0);
}
else if (HP1 < prevHealth)
{
    erase(0, 0, 0, 0);
    moveto(0, 0);
    lineto(width-1+HP1-28, 0);
}
prevHealth = HP1

This will only update the health if it has changed, so it will not spend time drawing the same thing over again.

thx, now i wont have to use activation events!

oh and there supose to be a ";" at the end

when i use that, its just put full black.
so i used:

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moveto(HP1/10,0)
lineto(width-1,0);

on when the actor gets hit

It should have been

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erase(0, 0, 0, 1);

DilloDude wrote:It should have been

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erase(0, 0, 0, 1);

oh, yay, no more activation events!