smooth transition between 2 images

Programming Questions

Half ease..

smooth transition between 2 images

in Programming Questions • 2 years ago

Hello everybody,
I'd like to be able to have a transition between two images. I'm using masks at the moment, but is there a better way? Id like to Load the pixels with the alpha channel ... but I dont know how to set the alpha parameter.. what the range of values?

thanks

Replies(3)

arthurG

Re: smooth transition between 2 images

2 years ago

Hi,

You can set the alpha of a pixel like that (not checked) :

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PImage img = loadImage (...);

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img.loadPixels();
changeAlpha(img,x,y,your_alpha);
img.updatePixels();

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//change alpha of the pixel x,y
void changeAlpha(PImage img, int x, int y, int a) {
int id = x+y*img.width;
int val = img.pixels[id];
img.pixels[id] = (val & 0xFFFFFF) | (a<<24);
}

Half ease..

Re: smooth transition between 2 images

2 years ago

hm ok I'll try and come back

hndrsn6

Re: Re: smooth transition between 2 images

2 years ago

Check out the tint() method: http://processing.org/reference/tint_.html You can set the RGBA value of an image using this.