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---
layout: default
---
<h3>Relativity</h3>
<p>Each color is perceived in relation to other colors.
The top and bottom bars each contain the same component colors,
but a different display order causes individual colors to appear differently.</p>
<p><a href="http://processing.org/learning/basics/relativity.html">Original Processing.org Example: Relativity</a><br>
<div class="learning-demo"><script type="application/processing">
color a, b, c, d, e;
void setup() {
size(200, 200);
noStroke();
a = color(165, 167, 20);
b = color(77, 86, 59);
c = color(42, 106, 105);
d = color(165, 89, 20);
e = color(146, 150, 127);
noLoop();
}
void draw() {
drawBand(a, b, c, d, e, 0, 4);
drawBand(c, a, d, b, e, height/2, 4);
}
void drawBand(color v, color w, color x, color y, color z, int ypos, int barWidth) {
int num = 5;
color[] colorOrder = { v, w, x, y, z };
for(int i = 0; i < width; i += barWidth*num) {
for(int j = 0; j < num; j++) {
fill(colorOrder[j]);
rect(i+j*barWidth, ypos, barWidth, height/2);
}
}
}
</script><canvas width="200" height="200"></canvas></div></p>
<div style="height:0px;width:0px;overflow:hidden;"></div>
<div class="code"><pre name="code" class="processing">// All Examples Written by Casey Reas</a> and Ben Fry</a>
// unless otherwise stated.
color a, b, c, d, e;
void setup() {
size(200, 200);
noStroke();
a = color(165, 167, 20);
b = color(77, 86, 59);
c = color(42, 106, 105);
d = color(165, 89, 20);
e = color(146, 150, 127);
noLoop();
}
void draw() {
drawBand(a, b, c, d, e, 0, 4);
drawBand(c, a, d, b, e, height/2, 4);
}
void drawBand(color v, color w, color x, color y, color z, int ypos, int barWidth) {
int num = 5;
color[] colorOrder = { v, w, x, y, z };
for(int i = 0; i < width; i += barWidth*num) {
for(int j = 0; j < num; j++) {
fill(colorOrder[j]);
rect(i+j*barWidth, ypos, barWidth, height/2);
}
}
}</pre></div>