 |
Author |
Topic: Colouring with same hue (Read 360 times) |
|
ssdesign
|
Colouring with same hue
« on: Jan 18th, 2005, 10:15pm » |
|
Hi,
I have created this sketch using Paul Bourke's SuperShapes equation.
I am able to generate gray scale sketch as you can see in the code below.
What I wanted to know is, how can I create a coloured sketch (colours of same colour range) of the same code.
Code:
// Super Shapes
// sajid saiyed December, 2004
// www.ssdesigninteractive.com/g2
float j,k;
int ji,ki;
float current;
float scale = width*6;
float xoff = width*2;
float yoff = width/1.7;
float x1,jj;
float y1;
float x=0.1;
float y=0.1;
float a = 1;
float b = 1;
float NP = 800;
float t1,t11,t111,t2,t22,t222;
float phi;
float r;
float gs = 0.5;
float gx = 0.5;
float gy = 0.5;
int dim = 500;
void setup(){
size(500, 500);
background(255);
for(int ss=0; ss<8; ss++){
float m=random(1/6,19/6);
float n1=random(0.1,0.3);
float n2=random(1.7);
float n3=random(1.7);
for(int dd=0; dd<80; dd++){
sajid(m,n1,n2,n3);
}
//jj = jj+5;
}
}
void loop(){
}
void sajid(float m1,float n11,float n22,float n33){
float m=m1;
float n1=n11;
float n2=n22;
float n3=n33;
for(int i=0; i<NP; i++){
//phi = (i*TWO_PI)/NP;
phi = random(0, 12*PI);
t111 = cos(m*phi/4)/a;
t11 = abs(t111);
t1 = pow(t11,n2);
t222 = sin(m*phi/4)/b;
t22 = abs(t222);
t2 = pow(t22,n3);
r = pow(t1+t2, 1/n1)-0.5;
if(abs(r) == 0){
x1 = 0;
y1 = 0;
} else{
r = 1/r;
x1 = r*cos(phi)+jj;
y1 = r*sin(phi);
}
float d = sqrt((x1-x)*(x1-x) + (y1-y)*(y1-y));
x = x1;
y = y1;
j = x * scale + xoff;
k = y * scale + yoff;
ji = int(j);
ki = int(k);
tpoint(int((x/gs+gx)*dim),int((y/gs+gy)*dim), ji, ki);
}
}
void tpoint(int x1, int y1, int ji, int ki) {
current = blue(get(x1,y1));
// set the drawing color to the current color minus a small offset
stroke(current-5);
//stroke(0);
point(x1,y1);
}
void mousePressed() {
float x=0.1;
float y=0.1;
background(255);
for(int ss=0; ss<8; ss++){
float m=random(1/6,19/6);
float n1=random(0.1,0.3);
float n2=random(1.7);
float n3=random(1.7);
for(int dd=0; dd<80; dd++){
sajid(m,n1,n2,n3);
}
//jj = jj+5;
}
}
|
|
Some of this code might look dirty to an expert programmer, but I have to clean this once I get the desired effect 
|
:: form follows function ::
|
|
|
st33d
|
Re: Colouring with same hue
« Reply #1 on: Jan 19th, 2005, 4:20pm » |
|
Code:
//red
void tpoint(int x1, int y1, int ji, int ki) {
current = green(get(x1,y1));
// set the drawing color to the current color minus a small offset
stroke(255,current-5,current-5);
//stroke(0);
point(x1,y1);
}
//green
void tpoint(int x1, int y1, int ji, int ki) {
current = red(get(x1,y1));
// set the drawing color to the current color minus a small offset
stroke(current-5,255,current-5);
//stroke(0);
point(x1,y1);
}
//blue
void tpoint(int x1, int y1, int ji, int ki) {
current = red(get(x1,y1));
// set the drawing color to the current color minus a small offset
stroke(current-5,current-5,255);
//stroke(0);
point(x1,y1);
}
|
|
It's a start I suppose.
Update:
Code:
background(150,150,130);
void tpoint(int x1, int y1, int ji, int ki) {
float current1 = green(get(x1,y1));
float current2 = red(get(x1,y1));
float current3 = blue(get(x1,y1));
// set the drawing color to the current color minus a small offset
stroke(current2+1,current1+1,current3-5);
//stroke(0);
point(x1,y1);
}
|
|
This is probably not what you want but I'm having fun none the less.
|
| « Last Edit: Jan 19th, 2005, 4:32pm by st33d » |
|
I could murder a pint.
|
|
|
ssdesign
|
Re: Colouring with same hue
« Reply #2 on: Jan 19th, 2005, 7:40pm » |
|
wow, that was cool.
I experimented with some variations in this line:
Code:
stroke(current2+1,current1+1,current3-5);
|
|
Here are some schemes which i liked:
CYAN & BLUE
stroke(current2-5,current1-1,current3+5);
RED & ORANGE
stroke(current2+2,current1-2,current3-5);
Also if you want to go ahead and try some variations, here are a few things:
1. Try changing the value of "g2":
Code:
//try changing this to greater value "1" or "6"
// this is the scaling factor
float gs = 0.5;
|
|
2. Also play around a bit with these values in the "setup()" or "mousePressed()" functions:
Code:
// refer "http://astronomy.swin.edu.au/~pbourke/curves/supershape/" for some hints
float m=random(1/6,19/6);
float n1=random(0.1,0.3);
float n2=random(1.7);
float n3=random(1.7);
|
|
|
| « Last Edit: Jan 19th, 2005, 7:47pm by ssdesign » |
|
:: form follows function ::
|
|
|
|
