# Example 3 Grid Input Format
# Created by Niraj Shah
# Please see the cooresponding figure to visualize this
#  grid layout!

DIMENSIONS 10 10
# Overall dimensions are 10 rows and 10 columns

NUMLAYERS 1
# Please note that this is an optional tag for this example.
# Since our design only has a single, bidirectional layer,
#  it is not necessary to include this line. The parser will
#  simply assume that there is a single layer named LAYER_1
#  that is bidirectional

DEFEDGECAP 7
# This makes our default edge capacity for both horizontal
#  and vertical tracks equal to 7

LAYER_1 B 6 6
# This specifies that LAYER_1 has both vertical and horizontal
#  routing tracks. Again, please see the comment under the
#  NUMLAYERS tag to see how this was tag was already implied
# Also we have set this layer's capacities to 6 for horizontal
#  and 6 for vertical. This is to show how the layer's default
#  capacities will override the overall default capacities

OBSTACLES
# Start the obstacle definitions

7 1 8 2 LAYER_1 -6
# This is the simple obstacle in the depiction for this example.
# It reduces the routing capacity of the horizontal and vertical
#  tracks that enter that grid cell to 0.

7 7 7 10 {LAYER_1}
# This is the Vertical Track Obstacle in the depiction for this
#  example. Note that since there is only one layer, it is not
#  necessary (but allowable) to use the set of layers braces.
# This will set the track capacity for the affected cells to the
#  default setting of 0.

0 2 0 5
# This is the Horizontal Track Obstacle in the depiction of the
#  routing grid. Notice that no values appear after the second
#  y value. This will create an obstacle on LAYER_1 that reduces
#  the affected tracks' capacities to 0.

0 5 2 8
2 7 5 8
# This is the obstacle definition for the large, non-simple
#  obstacle. Notice that the input file can only specify this
#  obstacle by breaking it apart manually into 2 simple obstacles

7 3 9 6 -4
# This obstacle only changes the affected tracks' capacities by
#  -4 sending the overall capacities of these tracks to 2

END OBSTACLES
# Close out the obstacles section..that is all for Example 3!!!