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improved plasma clouds

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Daniel Bulant 2025-10-28 11:24:10 +01:00
parent 90b439f5de
commit d4f4778a5d
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1 changed files with 27 additions and 9 deletions
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36
week7/PlasmaClouds.java
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@ -11,23 +11,41 @@ public class PlasmaClouds {
StdDraw.enableDoubleBuffering(); StdDraw.enableDoubleBuffering();
draw(.5, .5, 1, 1, variance, s); draw(.5, .5, 1, StdRandom.uniformDouble(), StdRandom.uniformDouble(), StdRandom.uniformDouble(), StdRandom.uniformDouble(), variance, s);
StdDraw.show(); StdDraw.show();
} }
public static void draw(double x, double y, double halfSize, double color, double var, double s) { // c = color ("color vertical horizontal")
if (halfSize < 0.01) { // t = top
StdDraw.setPenColor((int) (color * 255), (int) (color * 255), 255); // r = right
// l = left
// m = middle (horizontal)
// c = center (vertical)
public static void draw(double x, double y, double halfSize, double ctl, double ctr, double cbl, double cbr, double var, double s) {
var color = (ctl+ctr+cbl+cbr) / 4;
if (halfSize < 1/512.) {
var clamped = Math.clamp(color, 0, 1);
StdDraw.setPenColor((int) (clamped * 255), (int) (clamped * 255), 255);
StdDraw.filledRectangle(x, y, halfSize, halfSize); StdDraw.filledRectangle(x, y, halfSize, halfSize);
return; return;
} }
var newColor = Math.clamp(StdRandom.gaussian(color, Math.sqrt(var)), 0, 1); var newColor = StdRandom.gaussian(color, Math.sqrt(var));
var newVar = var / s; var newVar = var / s;
var newHalfSize = halfSize / 2; var newHalfSize = halfSize / 2;
int[][] offsets = { { 1, 1 }, { -1, 1 }, { -1, -1 }, { 1, -1 } };
for (var offset : offsets) { var ctm = (ctl + ctr) / 2;
draw(x + newHalfSize * offset[0], y + newHalfSize * offset[1], newHalfSize, newColor, newVar, s); var cbm = (cbl + cbr) / 2;
} var ccl = (cbl + ctl) / 2;
var ccr = (cbr + ctr) / 2;
// tl
draw(x - newHalfSize, y - newHalfSize, newHalfSize, ctl, ctm, ccl, newColor, newVar, s);
// tr
draw(x + newHalfSize, y - newHalfSize, newHalfSize, ctm, ctr, newColor, ccr, newVar, s);
// bl
draw(x - newHalfSize, y + newHalfSize, newHalfSize, ccl, newColor, cbl, cbm, newVar, s);
// br
draw(x + newHalfSize, y + newHalfSize, newHalfSize, newColor, ccr, cbm, cbr, newVar, s);
} }
} }