You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.0 KiB
43 lines
1.0 KiB
13 years ago
|
/**
|
||
|
|
* Wave Gradient
|
||
|
|
* by Ira Greenberg.
|
||
|
|
*
|
||
|
|
* Generate a gradient along a sin() wave.
|
||
|
|
*/
|
||
|
|
|
||
|
|
float angle = 0;
|
||
|
|
float px = 0, py = 0;
|
||
|
|
float amplitude = 30;
|
||
|
|
float frequency = 0;
|
||
|
|
float fillGap = 2.5;
|
||
|
|
color c;
|
||
|
|
|
||
|
|
int colorRange = 255;
|
||
|
|
int ncycles = 500;
|
||
|
|
|
||
|
|
void setup() {
|
||
|
|
size(640, 360);
|
||
|
|
background(200);
|
||
|
|
noLoop();
|
||
|
|
}
|
||
|
|
|
||
|
|
void draw() {
|
||
|
|
for (int i =- ncycles; i < height+ncycles; i++){
|
||
|
|
// Reset angle to 0, so waves stack properly
|
||
|
|
angle = 0;
|
||
|
|
// Increasing frequency causes more gaps
|
||
|
|
frequency+=.01;
|
||
|
|
for (float j = 0; j < width+ncycles; j++){
|
||
|
|
py = i + sin(radians(angle)) * amplitude;
|
||
|
|
angle += frequency;
|
||
|
|
c = color(abs(py-i)*colorRange/amplitude, colorRange-abs(py-i)*colorRange/amplitude, j*((colorRange * 1.0)/(width+(int)(ncycles * 0.66))));
|
||
|
|
// Hack to fill gaps. Raise value of fillGap if you increase frequency
|
||
|
|
for (int filler = 0; filler < fillGap; filler++){
|
||
|
|
set(int(j-filler), int(py)-filler, c);
|
||
|
|
set(int(j), int(py), c);
|
||
|
|
set(int(j+filler), int(py)+filler, c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|