How would I make a color Gradient with linear interpolation along with Linked list?

Question

I am currently trying to make a rainbow trail that follows your mouse. i used Linkedlist to plot the points of my mouse so the trail follows along. The trail itself looks pe

Answer 1

To get the effect you want, you are probably going to have to create a custom gradient paint that spans the gamut of hue along one axis and the range of alpha transparency along the other. As a related example, this KineticModel uses a RadialGradientPaint to create an array of GradientImage instances. In each image, the alpha varies radially from 0xff (1.0) at the center to 0x3f (0.25) at the periphery.

Addendum: Based on your picture, just set the graphics context's Stroke to a suitable width, set the paint to the next hue from your color lookup table (clut), and drawLine(). You can vary the hue, keeping the the saturation and brightness constant.

float N = 360;
Queue<Color> clut = new LinkedList<Color>();
for (int i = 0; i < N; i++) {
    clut.add(Color.getHSBColor(i / N, 1, 1));
}

You'll have to decide when to change colors based on space or time. For the latter, javax.swing.Timer is a good choice.