Lava Tower

float[] aa = new float[100];

float[] as = new float[100];

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float[] f = new float[100];

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float[][] hh = new float[100][100];

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float cc = random(360);

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void setup() {

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  size(800, 800, P3D);

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  colorMode(HSB, 360, 100, 100);

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  fill(130);

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  for (int i = 0; i < 100; i++) {

    aa[i] = random(PI / 12, PI / 9);

    as[i] = random(PI / 12);

    f[i] = random(0.75, 0.99);

    float hhh = random(380.0, 400.0);

    int j = 0;

    while (hhh > 0) {

      hhh -= random(26.7);

      hh[i][j] = hhh;

      if (hh[i][j] < 30.0) hh[i][j] = 30.0;

      j++;

    }

  }

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}

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float xx1, xx2, xx3, xx4, xx5, xx6, xx7, xx8;

float yy1, yy2, yy3, yy4, yy5, yy6, yy7, yy8;

float zz1, zz2, zz3, zz4, zz5, zz6, zz7, zz8;

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int m = 12;

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void draw() {

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  background(20, 20, 60);

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  translate(width / 2, height / 2 + 100, 0);

  rotateX(-PI / 10);

  rotateY(PI / 100 * frameCount/-5);

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  fill(20, 20, 20);

  beginShape();

  vertex(-width, 0, -width);

  vertex(width, 0, -width);

  vertex(width, 0, width);

  vertex(-width, 0, width);

  endShape(CLOSE);

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  float a = 0.0;

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  int i = 0;

  while (a < TWO_PI) {

    float r1 = 3.50;

    float r2 = 12.0;

    float ah = aa[i];

    if (a > TWO_PI - PI / 12) ah = TWO_PI - a;

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    int j = 0;

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    while (hh[i][j] > 0.0) {

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      xx1 = r1 * cos(a);

      xx2 = r1 * cos(a + ah);

      xx3 = xx1;

      xx4 = xx2;

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      xx5 = r2 * cos(a);

      xx6 = r2 * cos(a + ah);

      xx7 = xx5;

      xx8 = xx6;

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      yy1 = -hh[i][j];

      yy2 = -hh[i][j];

      yy3 = -hh[i][j + 1];

      yy4 = -hh[i][j + 1];

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      yy5 = -hh[i][j];

      yy6 = -hh[i][j];

      yy7 = -hh[i][j + 1];

      yy8 = -hh[i][j + 1];

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      zz1 = r1 * sin(a);

      zz2 = r1 * sin(a + ah);

      zz3 = r1 * sin(a);

      zz4 = r1 * sin(a + ah);

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      zz5 = r2 * sin(a);

      zz6 = r2 * sin(a + ah);

      zz7 = r2 * sin(a);

      zz8 = r2 * sin(a + ah);

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      fill(color(cc, 100 - 2.45 * j, 100 - 2.45 * j));

      segment(xx1, yy1, zz1,

        xx2, yy2, zz2,

        xx3, yy3, zz3,

        xx4, yy4, zz4,

        xx5, yy5, zz5,

        xx6, yy6, zz6,

        xx7, yy7, zz7,

        xx8, yy8, zz8);

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      j++;

      r1 *= 1.105;

      r2 *= 1.105;

    }

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    a += ah; //+as[i];

    i++;

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  }

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}

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void segment(float x1, float y1, float z1,

  float x2, float y2, float z2,

  float x3, float y3, float z3,

  float x4, float y4, float z4,

  float x5, float y5, float z5,

  float x6, float y6, float z6,

  float x7, float y7, float z7,

  float x8, float y8, float z8) {

  beginShape();

  vertex(x1, y1, z1);

  vertex(x2, y2, z2);

  vertex(x4, y4, z4);

  vertex(x3, y3, z3);

  endShape(CLOSE);

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  beginShape();

  vertex(x5, y5, z5);

  vertex(x6, y6, z6);

  vertex(x8, y8, z8);

  vertex(x7, y7, z7);

  endShape(CLOSE);

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  beginShape();

  vertex(x1, y1, z1);

  vertex(x3, y3, z3);

  vertex(x7, y7, z7);

  vertex(x5, y5, z5);

  endShape(CLOSE);

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  beginShape();

  vertex(x2, y2, z2);

  vertex(x4, y4, z4);

  vertex(x8, y8, z8);

  vertex(x6, y6, z6);

  endShape(CLOSE);

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  beginShape();

  vertex(x1, y1, z1);

  vertex(x2, y2, z2);

  vertex(x6, y6, z6);

  vertex(x5, y5, z5);

  endShape(CLOSE);

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  beginShape();

  vertex(x4, y4, z4);

  vertex(x3, y3, z3);

  vertex(x7, y7, z7);

  vertex(x8, y8, z8);

  endShape(CLOSE);

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}