示例#1
0
  /**
   * Add a zone to the zone picker.
   *
   * @param zone the zone to enable picking on.
   */
  public void add(Zone zone) {
    // check if we already have this zone
    if (zoneMap.containsValue(zone)) return;

    if (zoneMap.size() == POSSIBLE_COLORS) {
      // We've run out of pick colours :( oh no
      System.err.printf(
          "The number of zones has exceeded the maximum number of pickable zones (%d). This recently added zone (%s) will not be pickable.",
          POSSIBLE_COLORS, zone);
      return;
    }

    // get a new colour
    zone.setPickColor(new Color(currentColor, false));
    int pixelColor = 0xff + (currentColor << 8);
    zoneMap.put(pixelColor, zone);

    // dont bother searching if we're out of colours anyways
    if (zoneMap.size() < POSSIBLE_COLORS) {
      while (zoneMap.containsKey(pixelColor)) {
        currentColor += 1;
        pixelColor = 0xff + (currentColor << 8);
      }
    }

    // add all of the zone's child zones
    for (Zone child : zone.getChildren()) this.add(child);
  }
示例#2
0
  /**
   * Get the Zone under the specified coordinates.
   *
   * @param x x coordinate of the specified pixel
   * @param y y coordinate of the specified pixel
   * @return If there is a Zone at the specified coordinates, that zone, otherwise null.
   */
  public Zone pick(int x, int y) {
    // clamp x and y
    if (y >= picking_context.height) y = picking_context.height - 1;
    if (x >= picking_context.width) x = picking_context.width - 1;
    if (y < 0) y = 0;
    if (x < 0) x = 0;

    PGL pgl = picking_context.beginPGL();
    int pixel;
    // force fallback until 2.0b10
    if (!SMT.fastPickingEnabled() || pgl == null) {
      // really slow way(max 70 fps on a high end card vs 200+ fps with readPixels), with loadPixels
      // at the end of render()
      pixel = picking_context.pixels[x + y * picking_context.width];
    } else {
      buffer.clear();
      pgl.readPixels(x, picking_context.height - y, 1, 1, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, buffer);
      pixel = buffer.getInt();
    }
    picking_context.endPGL();

    if (zoneMap.containsKey(pixel)) {
      // if mapped it is either a Zone or null (background)
      Zone picked = zoneMap.get(pixel);
      Zone current = picked;
      while (current != null) {
        if (current.stealChildrensTouch) return current;
        current = current.getParent();
      }
      return picked;
    } else return null;
  }