Subversion Repositories DIN Is Noise

/*
* loom.cc
* DIN Is Noise is copyright (c) 2006-2025 Jagannathan Sampath
* DIN Is Noise is released under GNU Public License 2.0
* For more information, please visit https://dinisnoise.org/
*/
#include "loom.h"
#include "log.h"

loom::loom () {
  cell_size = 50;
  seam = 0.9;
  half_cell_size = cell_size / 2;
  for (int i = 0, j = 1; i < sz; ++i) {
    pattern0[i]=pattern[i]=j;
    j=!j;
    control[i]=1;
  }
  set_moveable (1);
}

void loom::draw () {
  int x0 = posx, y0 = posy, x1 = 0, y1 = 0, x2 = 0, y2 = 0;
  for (int i = 0; i < sz; ++i) {
    y1 = y0 + half_cell_size;
    y2 = y1 + half_cell_size;
    if (control[i]) flip_pattern ();
    for (int j = 0; j < sz; ++j) {
      x1 = x0 + cell_size;
      x2 = x1 - half_cell_size;
      if (pattern[j] == 0) {
        draw_rect (x0, y1, x1, y1, 0, 1, 1, 0); // horizontal
        draw_rect (x2, y0, x2, y2, 1, 1, 0, 1); // vertical
      } else {
        draw_rect (x2, y0, x2, y2, 1, 1, 0, 1); // vertical
        draw_rect (x0, y1, x1, y1, 0, 1, 1, 0); // horizontal
      }
      x0 = x1;
    }
    y0 = y2;
    x0 = posx;
  }
  int szzs = sz * cell_size;
  set_extents (posx, posy, posx + szzs, posy + szzs);
  memcpy (pattern, pattern0, sz * sizeof(int));
}

void loom::draw_rect (int x1, int y1, int x2, int y2, float r, float g, float b, int v) {
  float w = seam * half_cell_size;
  glColor3f (r, g, b);
  if (v) {
    glRectf (x1 - w, y1, x1 + w, y2);
  } else {
    glRectf (x1, y1 - w, x2, y1 + w);
  }
}

void loom::flip_pattern () { // to get one free pattern
  for (int i = 0, p; i < sz; ++i) {
    p = pattern[i];
    pattern[i]=!p;
  }
}