Function DrawObjects

xcharts0.cpp:1116–1185

// expanse of pixels, so that there's a minimum of overlapping glyphs.

void DrawObjects(ObjDraw *rgod, int cod, int zEdge)
{
  int zGlyph, zGlyph2, zGlyphS, zGlyphS2, i, j, k, k2, obj;
  KI kSav;

  // Define or adjust some initial values.
  zGlyph = 7*gi.nScale; zGlyphS = 9*gi.nScaleTextT;
  zGlyph2 = zGlyph << 1; zGlyphS2 = zGlyphS << 1;

  // Assume glyph is positioned below actual point, unless say otherwise.
  for (i = 0; i < cod; i++) if (rgod[i].f) {
    if (zEdge > 0 && !FInRect(rgod[i].x, rgod[i].y,
      zEdge, zEdge, gs.xWin-zEdge, gs.yWin-zEdge)) {
      rgod[i].f = fFalse;
      continue;
    }
    obj = rgod[i].obj;
    rgod[i].yg = rgod[i].y + (obj < moonsLo ? zGlyph : zGlyphS);
  }

  // Determine where to draw the glyphs in relation to the actual points,
  // so that the glyphs aren't drawn on top of each other if possible.
  for (i = 0; i < cod; i++) if (rgod[i].f) {
    obj = rgod[i].obj;
    k = k2 = gs.xWin + gs.yWin;

    // For each planet, will draw glyph either right over or right under the
    // actual planet location point. Find out the closest distance of any
    // other planet assuming glyph is placed at both possibilities.
    for (j = 0; j < i; j++) if (rgod[j].f) {
      k  = Min(k,  NAbs(rgod[i].x-rgod[j].x) + NAbs(rgod[i].yg-rgod[j].yg));
      k2 = Min(k2, NAbs(rgod[i].x-rgod[j].x) + NAbs(rgod[i].yg-rgod[j].yg -
        zGlyph2));
    }

    // Normally, put the glyph right below the actual point. If however
    // another planet is close enough to have their glyphs overlap, and the
    // above location is better, then will draw the glyph above instead.
    if (((k < zGlyph2 || k2 < zGlyph2) && k < k2) ||
      rgod[i].yg >= gs.yWin-zEdge)
      rgod[i].yg -= (obj < moonsLo ? zGlyph2 : zGlyphS2);
  }

  // Draw planet glyphs.
  for (i = cod-1; i >= 0; i--) if (rgod[i].f) {
    if (zEdge > 0 && !FInRect(rgod[i].x, rgod[i].yg,
      zEdge, zEdge, gs.xWin-zEdge, gs.yWin-zEdge))
      continue;
    obj = rgod[i].obj;
    if (rgod[i].kv != ~0) {
      kSav = kObjB[obj]; kObjB[obj] = rgod[i].kv;
    }
    DrawObject(rgod[i].obj, rgod[i].x, rgod[i].yg);
    if (rgod[i].kv != ~0)
      kObjB[obj] = kSav;
  }

  // Draw dots for actual object location.