@Override
public void draw(GFX gfx) {
float[] curr = toHSB(color);
float[] start = toHSB(startColor);
// hue, vertical
gfx.translate(centerPoint.getX(), centerPoint.getY());
for (double i = 0; i < 200; i++) {
FlatColor c = FlatColor.hsb(i / 200 * 360.0, curr[1], curr[2]);
gfx.setPaint(c);
double y = start[0] * 200;
gfx.drawLine(-5, i - y, +5, i - y);
}
gfx.translate(-centerPoint.getX(), -centerPoint.getY());
// saturation, 30 degrees
gfx.translate(centerPoint.getX(), centerPoint.getY());
for (double i = 0; i < 200; i++) {
FlatColor c = FlatColor.hsb(curr[0] * 360, i / 200.0, curr[2]);
gfx.setPaint(c);
double sin = Math.sin(Math.toRadians(30));
double cos = Math.cos(Math.toRadians(30));
double x = cos * i - cos * start[1] * 200 + 0;
double y = sin * i - sin * start[1] * 200 + 0;
// tx = cos(30)*i
// tx/cos(30) = i
gfx.drawLine(x, y - 5, x, y + 5);
}
gfx.translate(-centerPoint.getX(), -centerPoint.getY());
// brightness, 150 degrees
gfx.translate(centerPoint.getX(), centerPoint.getY());
for (double i = 0; i < 200; i++) {
FlatColor c = FlatColor.hsb(curr[0] * 360, curr[1], i / 200.0);
gfx.setPaint(c);
double sin = Math.sin(Math.toRadians(150));
double cos = Math.cos(Math.toRadians(150));
double x = cos * i - cos * start[2] * 200;
double y = sin * i - sin * start[2] * 200;
gfx.drawLine(x, y - 5, x, y + 5);
}
gfx.translate(-centerPoint.getX(), -centerPoint.getY());
gfx.setPaint(color);
double s = 16;
gfx.fillOval(centerPoint.getX() - s / 2, centerPoint.getY() - s / 2, s, s);
gfx.setPaint(FlatColor.BLACK);
gfx.drawOval(centerPoint.getX() - s / 2, centerPoint.getY() - s / 2, s, s);
gfx.drawRect(0, 0, getWidth(), getHeight());
}
