skyrocket.java

java编的一个火焰程序

package skyrocket;

import java.awt.Color;
import java.awt.Graphics2D;

class Skyrocket extends Thing {




Skyrocket( Canvas canvas, Color color, int originX ) {
	super( canvas );
//System.out.println( "sn,1021;color,"+color.getRGB()+";x,"+originX+";" );
	this.color = color;
	width = canvas.skyrocketWidth;
	height = canvas.skyrocketHeight;
	velocity = canvas.skyrocketVelocity;
	stateX = originX;
	stateY = canvas.getHeight();
}

void draw( Graphics2D g, int time ) {
	//canvas.things.add( new Trace(this) );
	velocity += canvas.gravity;
	velocity *= canvas.damp;
	stateY += velocity;
	g.fillOval( (int)stateX, (int)stateY, width, height );
}

void explode() {
	for( int i=0; i<canvas.pieceNumber; i++ ) {
		double angleXy = canvas.random.nextDouble() * 2 * Math.PI;
		double angleZ = canvas.random.nextDouble() * 2 * Math.PI;
		double pieceVelocity = canvas.pieceInitialVelocity * Math.cos(angleZ);
		Piece piece = new Piece( canvas, color, stateX, stateY, pieceVelocity, angleXy );
		canvas.things.add( piece );
	}
	stateDead = true;
}




}