Table Of Contents

Graph IDEProgramming ► Rectangle

The following is a complete script for programming a Rectangle graphic. When animated, it makes the rectangle blink and move around in a circle. Remember to set the Execute During Animation Program state if you animate a graphic.

/* Declarations */

double cos(double a);
double sin(double a);

@@class() Rectangle:Object

@@method(public, class) (id)alloc;
@@method(public, instance) (id)init;
@@method(public, instance) (unsigned)animationCount;
@@method(public, instance) (void)setCurveRed:(double)red green:(double)green blue:(double)blue alpha:(double)alpha;
@@method(public, instance) (void)setInteriorRed:(double)red green:(double)green blue:(double)blue alpha:(double)alpha;
@@method(public, instance) (void)moveCenterToXValue:(double)xValue yValue:(double)yValue;
@@method(public, instance) (void)sizeToCenteredWidth:(double)width height:(double)height;
@@method(public, instance) (void)release;


/* Execution block */

id myRectangle;
int ii;
unsigned animationCount;
double red, green;
double xValue, yValue;

myRectangle = [[Rectangle alloc] init];

animationCount = [myRectangle animationCount];

red = (animationCount % 10) / 10.0;
green = (animationCount % 20) / 20.0;

xValue = 250.0 + 100.0 * cos(animationCount/20.0);
yValue = 250.0 + 100.0 * sin(animationCount/20.0);

[myRectangle setInteriorRed:1.0 green:green blue:1.0 alpha:1.0];
[myRectangle setCurveRed:red green:1.0 blue:1.0 alpha:1.0];
[myRectangle moveCenterToXValue:xValue yValue:yValue];

[myRectangle release];


The general API is define in the section Graphic.

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