xreaderifs.d

   1 /* Written by Ketmar // Invisible Vector <ketmar@ketmar.no-ip.org>
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 module xreaderifs;
  18
  19 import arsd.simpledisplay;
  20 import arsd.image;
  21
  22 import iv.nanovg;
  23
  24 import xreadercfg;
  25
  26
  27 // ////////////////////////////////////////////////////////////////////////// //
  28 struct Interference {
  29   int y, ey, speed;
  30 }
  31
  32 __gshared Interference[] ifs;
  33
  34
  35 // ////////////////////////////////////////////////////////////////////////// //
  36 bool processIfs () {
  37   bool res = false;
  38   foreach (ref l; ifs) {
  39     if (l.speed == 0) continue;
  40     res = true;
  41     l.y += l.speed;
  42     if (l.speed < 0) {
  43       if (l.y < l.ey) l.speed = 0;
  44     } else {
  45       if (l.y > l.ey) l.speed = 0;
  46     }
  47   }
  48   return res;
  49 }
  50
  51
  52 void drawIfs (NVGContext vg) {
  53   if (vg is null) return;
  54   foreach (ref l; ifs) {
  55     if (l.speed == 0) continue;
  56     vg.beginPath();
  57     vg.fillColor(nvgRGB(0, 40, 0));
  58     vg.rect(0, l.y-1, GWidth, 3);
  59     vg.fill();
  60   }
  61 }
  62
  63
  64 bool addIf () {
  65   import std.random : uniform;
  66   if (interAllowed) {
  67     int idx = 0;
  68     while (idx < ifs.length && ifs[idx].speed != 0) ++idx;
  69     if (idx >= ifs.length) {
  70       if (ifs.length > 10) return false;
  71       ifs ~= Interference();
  72     }
  73     if (uniform!"[]"(0, 1) == 0) {
  74       // up
  75       ifs[idx].y = GHeight/2+uniform!"[]"(50, GHeight/2-100);
  76       int ty = ifs[idx].y-40;
  77       if (ty < 0) return false;
  78       ifs[idx].ey = uniform!"[]"(0, ty);
  79       ifs[idx].speed = -uniform!"[]"(1, 25);
  80     } else {
  81       // down
  82       ifs[idx].y = GHeight/2-uniform!"[]"(50, GHeight/2-100);
  83       int ty = ifs[idx].y+40;
  84       if (ty >= GHeight) return false;
  85       ifs[idx].ey = uniform!"[]"(ty, GHeight);
  86       ifs[idx].speed = uniform!"[]"(1, 25);
  87     }
  88     return true;
  89   }
  90   return false;
  91 }