Peripheral drift illusion: Difference between revisions
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[[File:Fōrmulæ - Peripheral drift illusion 03.png]]
=={{header|Java}}==
<syntaxhighlight lang="java">
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
public final class PeripheralDriftIllusion {
public static void main(String[] aArgs) {
EventQueue.invokeLater( () -> {
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("Peripheral Drift Illusion");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new PeripheralDrift() );
frame.pack();
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setVisible(true);
} );
}
}
final class PeripheralDrift extends JPanel {
public PeripheralDrift() {
setPreferredSize( new Dimension(460, 460) );
setBackground(LIGHT_OLIVE);
}
@Override
public void paintComponent(Graphics aGraphics) {
super.paintComponent(aGraphics);
Graphics2D graphics2D = (Graphics2D) aGraphics;
graphics2D.setStroke( new BasicStroke(3.0F) );
drawPeripheralDrift(graphics2D);
}
private void drawPeripheralDrift(Graphics2D aGraphics2D) {
final int panelWidth = getWidth();
final int outerSquare = panelWidth * 80 / 100;
final int border = ( panelWidth - outerSquare ) / 2;
final int cellSize = outerSquare / 12;
final int boxSize = cellSize * 75 / 100;
for ( int row = 0; row < 12; row++ ) {
int x = border + row * cellSize;
for ( int col = 0; col < 12; col++ ) {
int y = border + col * cellSize;
drawBox(x, y, boxSize, EDGES.get(col).get(row), aGraphics2D);
}
}
}
private void drawBox(int aX, int aY, int aSize, Edg aEdge, Graphics2D aGraphics2D) {
aGraphics2D.setColor(PALE_BLUE);
aGraphics2D.fillRect(aX, aY, aSize, aSize);
aGraphics2D.setColor(COLORS.get(aEdge.index).get(0));
aGraphics2D.drawLine(aX, aY, aX + aSize, aY);
aGraphics2D.setColor(COLORS.get(aEdge.index).get(1));
aGraphics2D.drawLine(aX + aSize, aY, aX + aSize, aY + aSize);
aGraphics2D.setColor(COLORS.get(aEdge.index).get(2));
aGraphics2D.drawLine(aX + aSize, aY + aSize, aX, aY + aSize);
aGraphics2D.setColor(COLORS.get(aEdge.index).get(3));
aGraphics2D.drawLine(aX, aY + aSize, aX, aY);
}
private enum Edg {
TL(0), TR(1), BR(2), BL(3);
private Edg(int aIndex) {
index = aIndex;
}
private final int index;
}
private static final List<List<Edg>> EDGES = List.of(
List.of( Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR ),
List.of( Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL ),
List.of( Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL ),
List.of( Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL ),
List.of( Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL ),
List.of( Edg.BR, Edg.BR, Edg.TR, Edg.BR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR ),
List.of( Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR ),
List.of( Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR ),
List.of( Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR ),
List.of( Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL ),
List.of( Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL ),
List.of( Edg.TR, Edg.TR, Edg.TL, Edg.TL, Edg.BL, Edg.BL, Edg.BR, Edg.BR, Edg.TR, Edg.TR, Edg.TL, Edg.TL ) );
private static final List<List<Color>> COLORS = List.of(
List.of( Color.WHITE, Color.BLACK, Color.BLACK, Color.WHITE ),
List.of( Color.WHITE, Color.WHITE, Color.BLACK, Color.BLACK ),
List.of( Color.BLACK, Color.WHITE, Color.WHITE, Color.BLACK ),
List.of( Color.BLACK, Color.BLACK, Color.WHITE, Color.WHITE ) );
private static final Color PALE_BLUE = new Color(51, 77, 255);
private static final Color LIGHT_OLIVE = new Color(204, 204, 0);
}
</syntaxhighlight>
[[File:PeripheralDriftJava.PNG]]
=={{header|Julia}}==
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