PtNorms Format Created from a regular grid

Syntax Summary

grid2PtNorms [ ? | help=] [-h | -help ]

[in= dds_horizon_dict] [mask=dds_mask_dict]

[fn_norms= ray_starting_info]

[axis= x y] [verbose=]

[size.x= size_of_fastest_data_direction]

[size.y= size_of_next_data_direction]

[delta.x= increment_associated_with_fastest_dir

[delta.y= increment_associated_with_next_dir

[x0= coordinate_origin_of_fastest_dir]

[y0= coordinate_origin_of_second_dir]

[scale= scaling_factor ]

Syntax Details

help= causes this help message to be printed

in= dds_horizon_dict identifys the horizon file data dictionary

mask=dds_mask_dict identifies the mask data dictionary Normals are computed at grid locations with mask greater than or equal to 1. Normals are not computed if the mask is less than 1.

fn_norms= surface_at_depth identifies the output PtNorms file. This file contains the normal directions of the surface.

axis= x y z identifies the names of the coordinate axes

size.x= size_of_fastest_data_dir sets the number of values in the fastest data direction.

size.y= size_of_second_data_dir sets the number of values in the second data direction.

delta.x=dx sets the size of the increment in the first direction.

delta.y=dy sets the size of the increment in the 2nd direction.

origin.x=sets the position of the origin in the first direction

origin.y=sets the position of the origin in the 2nd direction

Ray starting locations are computed using the following algorithm:

fastest_coordinate is set to x0+(i-1)*dx

second coordinate is set to y0+(j-1)*dy

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