w3hJava

What to achieve: A sparkling glass(beer glasses are clean and shiny before beer get served) like this.

So, our aim is to make those sparkling effect on glass. Here is the code in JavaFX(things are little hard coded but better for understanding):

package sample;

import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.text.Text;
import javafx.scene.text.Font;
import javafx.scene.image.ImageView;
import javafx.scene.image.Image;
import javafx.scene.shape.Rectangle;
import javafx.scene.paint.Color;
import javafx.scene.input.MouseEvent;
import javafx.scene.transform.Rotate;
import javafx.scene.shape.Polygon;
import javafx.animation.Timeline;
import javafx.animation.KeyFrame;
import javafx.animation.Interpolator;
import javafx.scene.shape.Circle;

var r = 0.0;
var t = Timeline {
    repeatCount: Timeline.INDEFINITE
    keyFrames: [
        KeyFrame {
            time: 3s
            canSkip: true
            values: [
                r => 360.0 tween Interpolator.EASEBOTH
            ]
        }
    ]
}
t.play();
var op = 1.0;
var t1 = Timeline {
    repeatCount: Timeline.INDEFINITE
    keyFrames: [
        KeyFrame {
            time: 3s
            canSkip: true
            values: [
                op => 0.0 tween Interpolator.EASEBOTH
            ]
        }
    ]
}
t1.play();

Stage {
    title: “Sparkling on Glass”
    width: 250
    height: 480
    scene: Scene {
        fill: Color.BLACK
        content: [
            ImageView {
                image: Image {
                    url: "{__DIR__}wineglass.png"
                }
            }
            Polygon {
                rotate: bind r;
                translateX: 130
                translateY: 100
                scaleX: 0.5
                scaleY: 0.5
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind op
            },
            Polygon {
                rotate: 45;
                scaleX: 0.25
                scaleY: 0.25
                translateX: 130
                translateY: 100
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind 1 - op
            },
            Polygon {
                rotate: bind r;
                translateX: 50
                translateY: 50
                scaleX: 0.5
                scaleY: 0.5
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind op
            },
            Polygon {
                rotate: 45;
                scaleX: 0.25
                scaleY: 0.25
                translateX: 50
                translateY: 50
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind 1 - op
            },
            Polygon {
                rotate: bind r;
                translateX: 30

                translateY: 120
                scaleX: 0.5
                scaleY: 0.5
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind op
            },
            Polygon {
                rotate: 45;
                scaleX: 0.25
                scaleY: 0.25
                translateX: 30
                translateY: 120
                points: [ 0,0, 2,-50, 4,0, 54,2,4,4,2,54,0,4,-50,2]
                fill: Color.WHITE
                opacity: bind 1 - op
            },
        ]

    }
}

Same animation in flash is here : http://www.entheosweb.com/Flash/sparkling_effect.asp

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One of the greatest features in Java is support for multi-threading. Generally we have misconceptions about the concepts of threading. We tend to think it more as a part of coding and hence take it only at coding time. Threading is all about designing and not about coding. If you want to write a good threading code, think of it before writing the code. Sometime back, I had made a presentation on multi-threading in Java with some demos. Have a look here

here

Presentation is very basic and talk simple things. Your comments are most welcome.

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