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2. ATTRIBUTE macro substitution value list

The following is the structure of ATTRIBUTE macro used in SGL and the list of macro substitution values ​​for each member. Please refer to Programmer's Tutorial “Chapter 7: Polygon surface attribute” for details of polygon surface attribute setting by ATTRIBUTE macro and actual usage example.

Figure 2-1 ATTRIBUTE macro structure

The ATTRIBUTE macro includes the following members:
Refer to the list of substitution values ​​for the macro substitution values ​​for each member.

plane: Specify the front and back attributes.
sort: Determines the representative point of the Z sort.
texture: Assign texture number or No_Texture.
color: Assigns the color of the polygon surface specified by the C_RGB macro or No_Palet.
gouraud: Specify the start address of the area where the gouro table is stored.
            Assign No_Gouraud if you do not want to use Gouraud processing.
mode: Specify various polygon modes.
            Multiple assignment values ​​for each group can be concatenated with the or operator “|” to specify multiple values ​​simultaneously.
dir: Sets the texture inversion function.
option ： Sets other polygons, connected by the or operator “|”, and multiple simultaneous settings are possible.
            When no option is used, substitute No_Option.

Table 2-1 ATTRIBUTE macro substitution value list (1/3)

Table 2-1 ATTRIBUTE macro substitution value list (2/3)

Table 2-1 ATTRIBUTE macro substitution value list (3/3)

Note) Specification restrictions related to texture:
Do not specify “sprHflip” or “sprVflip” if no texture is used for the object.

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