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---
layout: default
---
<h3>Pattern</h3>
<p>Move the cursor over the image to draw with a software tool
which responds to the speed of the mouse.</p>
<p><a href="http://processing.org/learning/topics/pattern.html"><b>Original Processing.org Example:</b> Pattern</a><br>
<div class="learning-demo"><script type="application/processing">
void setup()
{
size(200, 200);
background(102);
smooth();
}
void draw()
{
// Call the variableEllipse() method and send it the
// parameters for the current mouse position
// and the previous mouse position
variableEllipse(mouseX, mouseY, pmouseX, pmouseY);
}
// The simple method variableEllipse() was created specifically
// for this program. It calculates the speed of the mouse
// and draws a small ellipse if the mouse is moving slowly
// and draws a large ellipse if the mouse is moving quickly
void variableEllipse(int x, int y, int px, int py)
{
float speed = abs(x-px) + abs(y-py);
stroke(speed);
ellipse(x, y, speed, speed);
}
</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 and Ben Fry
// unless otherwise stated.
void setup()
{
size(200, 200);
background(102);
smooth();
}
void draw()
{
// Call the variableEllipse() method and send it the
// parameters for the current mouse position
// and the previous mouse position
variableEllipse(mouseX, mouseY, pmouseX, pmouseY);
}
// The simple method variableEllipse() was created specifically
// for this program. It calculates the speed of the mouse
// and draws a small ellipse if the mouse is moving slowly
// and draws a large ellipse if the mouse is moving quickly
void variableEllipse(int x, int y, int px, int py)
{
float speed = abs(x-px) + abs(y-py);
stroke(speed);
ellipse(x, y, speed, speed);
}</pre></div>