linking values with different range

Programming Questions

karlhungus

linking values with different range

in Programming Questions • 1 year ago

here lines y and y1 values are min 0, max 576 (height)
fill values are from 0 to 255
how do you link those two
so that line reach maximum aka i%height in the same time as fill reaches 255
???

int d=5;
int i=0;

void setup(){
size(768,576);
smooth();
frameRate(12);
}
void draw(){
i=i+d;
fill(0,0,0,50);
rectMode(CORNER);
rect(0,0,width/2,height);
stroke(255);
line(0,i%height,width/2,i%height);
fill(i%height,0,0);
rect(width/2,0,width/2, height);
}

Replies(3)

David Wil..

Re: linking values with different range

1 year ago

Have a look at the map function

Cheers

Dave

Calx | http://calx.co.uk

karlhungus

Re: linking values with different range

1 year ago

i try to use map here but i still fail
can anyone show me how to use it in this example, please

int d=5;
int i=0;

void setup(){
size(768,576);
smooth();
frameRate(12);
}
void draw(){
i=i+d;
fill(0,0,0,50);
rectMode(CORNER);
rect(0,0,width/2,height);
stroke(255);
line(0,i%height,width/2,i%height);

int value = 0;
int m = int(map(value, 0, 255, 0, height));
fill(m+i%height,0,0);
rect(width/2,0,width/2, height);

}

benja

Re: linking values with different range

1 year ago

Not much i could explain, what is not already in the reference, but here is how it could look like:

int d=5;
int i=0;

void setup() {
size(768, 576);
smooth();
frameRate(12);
rectMode(CORNER);
stroke(255);
}
void draw() {
i += d;

fill(0, 0, 0, 50);
rect(0, 0, width/2, height);

int y = i%height;
line(0, y, width/2, i%height);

int m = int(map(y, 0, height, 0, 255));
fill(m, 0, 0);

rect(width/2, 0, width/2, height);
}

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