Class jaws.PixelMap

Class Detail

tile_map = new jaws.Parallax({image: "map.png", scale_image: 4})  // scale_image: 4 for retro blocky feeling!
tile_map.draw()                                     // draw on canvas
tile_map.nameColor([0,0,0,255], "ground")           // give the color black the name "ground"
tile_map.namedColorAtRect("ground", player.rect())  // True if players boundingbox is touching any black pixels on tile_map

Parameters:

options

Field Detail

Method Detail

• {array} at(x, y)
  Read current color at given coordinates X/Y

  Parameters:

  x

  y

  Returns:

  {array} 4 integers [R, G, B, A] representing the pixel at x/y
• draw()
  Draws the pixel map on the maincanvas
• nameColor(color, name)
  Give a RGBA-array a name. Later on we can work with names instead of raw colorvalues.

  pixel_map.nameColor([0,0,0,255], "ground")    // Give the color black (with no transparency) the name "ground"

  Parameters:

  color

  name
• {string} namedColorAt(x, y)
  Get previously named color if it exists at given x/y-coordinates.

  Parameters:

  x

  y

  Returns:

  {string} name or color
• {string} namedColorAtRect(Rect, Color_Filter)
  Trace the outline of a Rect until a named color found.

  Parameters:

  {object} Rect

  Instance of jaws.Rect()

  {string} Color_Filter

  Only look for this named color

  Returns:

  {string} name of found color
• update(x, y, width, height)
  Updates internal pixel-array from the canvas. If we modify the 'terrain' (paint on pixel_map.context) we'll need to call this method.

  Parameters:

  x

  y

  width

  height