Java 类javafx.scene.effect.FloatMap 实例源码

List<NamedEffect> getNamedEffectList() {
    final FloatMap mapWaves = new FloatMap();
    mapWaves.setWidth(100);
    mapWaves.setHeight(80);
    for (int i = 0; i < mapWaves.getWidth()-1; i++) {
        float v = (float) ((Math.sin(i / 30f * Math.PI) - 0.5f) / 20f);
        for (int j = 0; j < mapWaves.getHeight()-1; j++) {
            mapWaves.setSamples(i, j, 0f, v);
        }
    }

    List<NamedEffect> nes = new ArrayList<NamedEffect>();
    nes.add(new NamedEffect("defaults", new DisplacementMap() {{ setMapData(mapWaves); }}));
    nes.add(new NamedEffect("scale",  new DisplacementMap() {{ setMapData(mapWaves); setScaleX(1.2f); setScaleY(2.0f);}}));
    nes.add(new NamedEffect("offset",  new DisplacementMap() {{ setMapData(mapWaves); setOffsetX(0.2f); setOffsetY(0.1f);}}));
    nes.add(new NamedEffect("wrap",  new DisplacementMap() {{ setMapData(mapWaves); setWrap(true); setOffsetX(0.5f); setOffsetY(0.3f);}}));
    return nes;
}

private void compute(double w, double h){
    FloatMap floatMap = new FloatMap();
    int w1 = (int)w;
    int h1 =  (int)h;
     floatMap.setWidth(w1);
     floatMap.setHeight(h1);

     for (int i = 0; i < w1; i++) {
         double v = (Math.sin(i / 20.0 * Math.PI) - 0.5) / 40.0;
         for (int j = 0; j < h1; j++) {
             floatMap.setSamples(i, j, 0.0f, (float) v);
         }
     }

     displacementMap.setMapData(floatMap);
}

private void applyEffect(ScrollPane scroll) {
    DisplacementMap displacementMap = new DisplacementMap();
    FloatMap floatMap = new FloatMap((int) width, (int) height);
    for (int i = 0; i < (int) width; i++) {
        double v = (Math.sin(i / 50.0 * Math.PI) - 1) / 10.0;
        for (int j = 0; j < (int) height; j++) {
            floatMap.setSamples(i, j, 0, (float) v);
        }
    }
    displacementMap.setMapData(floatMap);
    scroll.setEffect(displacementMap);
}

private void applyCosWaveEffect(ScrollPane scroll) {
    DisplacementMap displacementMap = new DisplacementMap();
    FloatMap floatMap = new FloatMap((int) width, (int) height);
    for (int i = 0; i < (int) width; i++) {
        double v = (Math.cos(i / 20.0 * Math.PI) - 0.5) / 40.0;
        for (int j = 0; j < (int) height; j++) {
            floatMap.setSamples(i, j, 0, (float) v);
        }
    }
    displacementMap.setMapData(floatMap);
    scroll.setEffect(displacementMap);
}

private void applySineWaveEffect(ScrollPane scroll) {
    DisplacementMap displacementMap = new DisplacementMap();
    FloatMap floatMap = new FloatMap((int) width, (int) height);
    for (int i = 0; i < (int) width; i++) {
        double v = (Math.sin(i / 20.0 * Math.PI) - 0.5) / 40.0;
        for (int j = 0; j < (int) height; j++) {
            floatMap.setSamples(i, j, 0, (float) v);
        }
    }
    displacementMap.setMapData(floatMap);
    scroll.setEffect(displacementMap);
}

@Override
public void start(Stage stage) throws Exception {
    this.stage = stage;
    configureScene();
    configureStage();
    // Logic starts
    for (int i = 0; i < BANNER_NB; i++) {
        maps[i] = new FloatMap(W, H);
    }

    for (int x = 0; x < W/2; x++) {
        double angle = Math.PI * x / 50.0;
        float v = (float) (Math.sin(angle) / 20.0);
        float scaledX = x / W;
        System.out.println(x + " : " + angle + " : " + v);
        for (int y = 0; y < H; y++) {
            float scaledY = y / H;
            float scaledV = (float) (v - (1.0 - scaledY) / 20.0);
            maps[0].setSamples(x, y, 0, 0);
            maps[1].setSamples(x, y, v);
            maps[2].setSamples(x, y, 0, scaledV);
            maps[3].setSamples(x, y, v, scaledV);
            double sq = Math.sqrt(x * x + y * y);
            maps[4].setSamples(x, y, (float) ((115 - sq) / 115.0));
            maps[5].setSamples(x, y, 0, (float) (scaledX * scaledY * 4.7));
            maps[6].setSamples(x, y, 0, (float) (scaledX * 0.5));
            maps[7].setSamples(x, y, (float) (scaledY * 0.5));
        }
    }

    String[] messages = { "Reference", "Accordion", "Wavy Text", "Dizzy Text", "OxoXoxO", "XoxOxoX", "13463463", "2346346436" };
    VBox vb = new VBox();
    vb.setSpacing(15);
    for (int k = 0; k < messages.length; k++) {
        vb.getChildren().add(
                GroupBuilder.create().effect(DisplacementMapBuilder.create().mapData(maps[k]).wrap(bTestWrap).build()).cache(true)
                        .children(new Banner(messages[k])).build());
    }
    root.getChildren().add(
            ScrollPaneBuilder.create().fitToHeight(true).fitToWidth(true).style("-fx-background-color:transparent;").content(vb)
                    .build());
}