* Clean Nozzle Feature -- EXPERIMENTAL
 *
 * Adds the G12 command to perform a nozzle cleaning process.
 *
 * Parameters:
 *   P  Pattern
 *   S  Strokes / Repetitions
 *   T  Triangles (P1 only)
 *
 * Patterns:
 *   P0  Straight line (default). This process requires a sponge type material
 *       at a fixed bed location. "S" specifies strokes (i.e. back-forth motions)
 *       between the start / end points.
 *
 *   P1  Zig-zag pattern between (X0, Y0) and (X1, Y1), "T" specifies the
 *       number of zig-zag triangles to do. "S" defines the number of strokes.
 *       Zig-zags are done in whichever is the narrower dimension.
 *       For example, "G12 P1 S1 T3" will execute:
 *
 *          --
 *         |  (X0, Y1) |     /\        /\        /\     | (X1, Y1)
 *         |           |    /  \      /  \      /  \    |
 *       A |           |   /    \    /    \    /    \   |
 *         |           |  /      \  /      \  /      \  |
 *         |  (X0, Y0) | /        \/        \/        \ | (X1, Y0)
 *          --         +--------------------------------+
 *                       |________|_________|_________|
 *                           T1        T2        T3
 *
 *   P2  Circular pattern with middle at NOZZLE_CLEAN_CIRCLE_MIDDLE.
 *       "R" specifies the radius. "S" specifies the stroke count.
 *       Before starting, the nozzle moves to NOZZLE_CLEAN_START_POINT.
 *
 *   Caveats: The ending Z should be the same as starting Z.
 * Attention: EXPERIMENTAL. G-code arguments may change.
 *
 */
//#define NOZZLE_CLEAN_FEATURE

#if ENABLED(NOZZLE_CLEAN_FEATURE)
  // Default number of pattern repetitions
  #define NOZZLE_CLEAN_STROKES  12

  // Default number of triangles
  #define NOZZLE_CLEAN_TRIANGLES  3

  // Specify positions as { X, Y, Z }
  #define NOZZLE_CLEAN_START_POINT { 30, 30, (Z_MIN_POS + 1)}
  #define NOZZLE_CLEAN_END_POINT   {100, 60, (Z_MIN_POS + 1)}

  // Circular pattern radius
  #define NOZZLE_CLEAN_CIRCLE_RADIUS 6.5
  // Circular pattern circle fragments number
  #define NOZZLE_CLEAN_CIRCLE_FN 10
  // Middle point of circle
  #define NOZZLE_CLEAN_CIRCLE_MIDDLE NOZZLE_CLEAN_START_POINT

  // Moves the nozzle to the initial position
  #define NOZZLE_CLEAN_GOBACK
#endif