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<script src="javascript-processing-example-processing.js"></script>
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</head><body><h1><a href="http://ejohn.org/blog/processingjs/">Processing.js</a></h1>
<h2>MultipleConstructors</h2>
<p>A class can have multiple constructors that assign the fields in different ways.
Sometimes it's beneficial to specify every aspect of an object�s data by assigning
parameters to the fields, but other times it might be appropriate to define only
one or a few.</p>
<p><a href="http://processing.org/learning/basics/multipleconstructors.html"><b>Original Processing.org Example:</b> MultipleConstructors</a><br>
<script type="application/processing">
Spot sp1, sp2;
void setup()
{
size(200, 200);
background(204);
smooth();
noLoop();
// Run the constructor without parameters
sp1 = new Spot();
// Run the constructor with three parameters
sp2 = new Spot(122, 100, 40);
}
void draw() {
sp1.display();
sp2.display();
}
class Spot {
float x, y, radius;
// First version of the Spot constructor;
// the fields are assigned default values
Spot() {
x = 66;
y = 100;
radius = 16;
}
// Second version of the Spot constructor;
// the fields are assigned with parameters
Spot(float xpos, float ypos, float r) {
x = xpos;
y = ypos;
radius = r;
}
void display() {
ellipse(x, y, radius*2, radius*2);
}
}
</script><canvas width="200" height="200"></canvas></p>
<div style="overflow: hidden; height: 0px; width: 0px;"></div>
<pre><b>// All Examples Written by <a href="http://reas.com/">Casey Reas</a> and <a href="http://benfry.com/">Ben Fry</a>
// unless otherwise stated.</b>
Spot sp1, sp2;
void setup()
{
size(200, 200);
background(204);
smooth();
noLoop();
// Run the constructor without parameters
sp1 = new Spot();
// Run the constructor with three parameters
sp2 = new Spot(122, 100, 40);
}
void draw() {
sp1.display();
sp2.display();
}
class Spot {
float x, y, radius;
// First version of the Spot constructor;
// the fields are assigned default values
Spot() {
x = 66;
y = 100;
radius = 16;
}
// Second version of the Spot constructor;
// the fields are assigned with parameters
Spot(float xpos, float ypos, float r) {
x = xpos;
y = ypos;
radius = r;
}
void display() {
ellipse(x, y, radius*2, radius*2);
}
}</pre>
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