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Grid World Part 3

Grid World Part 3. A closer look at the world. Class interactions. Location class. (0,0) is top left of grid (row, column) Constants for direction Location.NORTH Constants for common turn angles Location.LEFT, Location.HALF_RIGHT are -90 and 45. Location Methods.

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Grid World Part 3

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  1. Grid World Part 3 A closer look at the world

  2. Class interactions

  3. Location class • (0,0) is top left of grid • (row, column) • Constants for direction • Location.NORTH • Constants for common turn angles • Location.LEFT, Location.HALF_RIGHT are -90 and 45

  4. Location Methods • public Location(int r, int c) • public int getRow() • public int getCol() • public Location getAdjacentLocation(int direction) • public int getDirectionToward(Location target) • .equals(Location other) • .compareTo(Location other) closest to upper left corner goes first

  5. Grid Interface • Implemented by BoundedGrid and UnboundedGrid • boolean isValid(Location loc) • E put(Location loc, E obj) • Put object at location and return previous inhabitant or null • E remove(Location loc) • E get(Location loc) • ArrayList<Location> getOccupiedLocations() • int getNumRows() • int getNumCols()

  6. Grid continued • Methods to collect info about surroundings • ArrayList<Location> getValidAdjacentLocations(Location loc) • ArrayList<Location> getEmptyAdjacentLocations(Location loc) • ArrayList<Location> getOccupiedAdjacentLocations(Location loc) • ArrayList<Actor> getNeighbors(Location loc)

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