MIL-STD-2301A
5.2.2.2.33 Output Circular Arc Center Close element. The CGM implementation for NITFS shall generate and output the Circular Arc Center Close element using the following attributes. The following attributes must be stated before the first use of the Circular Arc Center Close element but need not be restated for subsequent occurrences unless a different attribute value is required.
a. Fill Color
b. Interior Style
c. Edge Visibility d. Edge Width
e. Edge Type f. Edge Color
5.2.2.2.34 Auxiliary Color for output. The CGM implementation for NITFS shall provide the capability to generate and output the Auxiliary Color element in support of EDGE TYPE, LINE TYPE, and TEXT.
5.2.2.2.35 Transparency for output. The CGM implementation for NITFS shall provide the capability to generate and output the Transparency element as either (1 = on) or (0 = off) in support of EDGE TYPE, LINE TYPE, and TEXT.
5.2.2.2.36 CGM element defaults for output. The CGM implementation for NITFS shall assume all CGM default values as stated in the Part 3 - Binary Encoding in the FIPS PUB 128 for each CGM that the CGM implementation generates and outputs unless otherwise specified in this document. The CGM element defaults for output include, but are not limited to, those in table CXVIII. Since this standard only specifies a single value or option, these elements, although permitted, never need to appear in a CGM.
TABLE CXVIII. CGM element defaults for output.
VDC TYPE: |
16 BIT INTEGER |
INTEGER PRECISION: |
16 BIT INTEGER |
INDEX PRECISION: |
16 BIT INTEGER |
COLOR PRECISION: |
8 BIT INTEGER |
TRANSPARENCY: |
ON |
TEXT PRECISION: |
STRING |
CHARACTER EXPANSION FACTOR: |
1.0 |
CHARACTER SPACING: |
0.0 |
TEXT PATH: |
RIGHT |
TEXT ALIGNMENT: |
NORMAL HORIZONTAL, NORMAL VERTICAL |
BACKGROUND COLOR: |
NONE (THIS IS NITF SPECIFIC) |
COLOR VALUE EXTENT: |
0,0,0 - 255,255,255 |
VDC INTEGER PRECISION: |
16 BIT INTEGER |
5.2.2.2.37 Degeneracy. The CGM implementation for NITFS is precluded from generating and outputting degenerate CGM elements.
6. NOTES
(This section contains general or explanatory information that may be helpful but is not mandatory).
6.1 CGM example Metafiles. The following examples illustrate complete CGM metafiles compatible with the CGM implementation for NITFS.
6.1.1 Polygon example. The following example represents a white filled polygon with three vertices at
(4,5), (6,7), and (8,9) relative to the VDC Extent origin.
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