Processing: Creative Coding and Computational Art

PROCESSING: CREATIVE CODING AND COMPUTATIONAL ART
472
getters/setters
Finishing the class are getter and setter methods for the instance properties. You’ll learn
more about the benefit of getters and setters in Chapter 14, when I show you how to work
in Java mode. For now, you can access instance properties directly, as in rg.c1 (assuming
rg is the name of the gradient object), or using the method rg.getColor1().
LinearGradient class
class LinearGradient extends Gradient {
int axis;
//default constructor
LinearGradient() {
axis = AXIS_VERTICAL;
}
//constructor
LinearGradient(color c1, color c2) {
this.c1 = c1;
this.c2 = c2;
axis = AXIS_VERTICAL;
}
//constructor
LinearGradient(color c1, color c2, Rectangle bounds) {
this.c1 = c1;
this.c2 = c2;
this.bounds = bounds;
axis = AXIS_VERTICAL;
}
//constructor
LinearGradient(color c1, color c2, Rectangle bounds, int axis) {
this.c1 = c1;
this.c2 = c2;
this.bounds = bounds;
this.axis = axis;
}
// required: implemented create method
void create(){
// calculate differences between color components
float deltaR = red(c2)-red(c1);
float deltaG = green(c2)-green(c1);
float deltaB = blue(c2)-blue(c1);