function

slRparaInitSet

Store rotation parameter table in VRAM area

Format

    #include "sgl.h"

    ROTSCROLL *addr_A;

    void slRparaInitSet( addr_A );

argument

    ROTSCROLL *addr_A - VRAM start address where rotation parameter table is stored

Return number

    void - returns nothing.

function

Rotation parameter table (size: 60H) used for rotation scrolling in VRAM Store in area. Parameter B is stored from the position of parameter A+20H, so a total of E0H is required for parameters A and B.
The default storage address when this function is not used is 25E3FF00H.
Be sure to specify an absolute address for addr_A.

example

    slRparaInitSet ( ( void * )( 0x25e5fe00 ) );

reference

slMakeKtable	slKtableRA	slKtableRB	slRparaReadCtrlRA
slRparaReadCtrlRB	MsScreenSizeX	MsScreenSizeY	Resolution
VDP2_RPTA	ScrRotPtr	rpara_vram_adr	RotScrParA
RotScrParB

function

slCurRpara

Specify the parameter to manipulate the rotation parameter

Format

    #include "sgl.h"

    Uint16 mode;

    void slCurRpara( mode );

argument

    Uint16 mode - rotation parameters

Return number

    void - returns nothing.

function

Specify the parameter to be manipulated among rotation parameters A and B.
The following parameters are included in mode.
RA : Rotation parameter A RB : Rotation parameter B

example

    /* Manipulate rotation coefficient A */
    slCurRpara ( RA );
    slUnitMatrix ( CURRENT );
    slTranslate ( toFIXED ( 10.0 ), toFIXED ( 20.0 ), toFIXED ( 15.0 ) );
    slRotZ ( DEGtoANG ( 10.0 ) );
    slScrMatSet ();

    /* Manipulate rotation coefficient B */
    slCurRpara ( RB );
    slUnitMatrix ( CURRENT );
    slTranslate ( toFIXED ( 100.0 ), toFIXED ( -100.0 ), toFIXED ( 15.0 ) );
    slRotZ ( DEGtoANG ( 10.0 ) );
    slScrMatSet ();

reference

slRparaMode	slScrMatSet	slScrMatConv	ScrRotPtr
RotScrParA	RotScrParB

function

slRparaMode

Specify rotation parameter usage mode

Format

    #include "sgl.h"

    Uint16 mode;

    void slRparaMode( mode );

argument

    Uint16 mode - Rotation parameter mode (described later).

Return number

    void - returns nothing.

function

Specify the usage mode of rotation parameters A and B.
The following parameters are entered in mode.
RA : Only rotation parameter A is used RB : Only rotation parameter B is used K_CHANGE : Image switching based on the coefficient data of rotation parameter A W_CHANGE : Image switching using the rotation parameter window

example

    slRparaMode ( RA );

reference

slCurRpara	slRparaMode	slRparaReadCtrlRA	slRparaReadCtrlRB
VDP2_RPMD

function

slMakeKtable

Create a table of coefficients

Format

    #include "sgl.h"

    void *addr_A;

    void slMakeKtable( *addr_A );

argument

    void *addr_A - VRAM address of coefficient table

Return number

    void - returns nothing.

function

Create a table of coefficients to use in 3D rotation.
2 Create one bank of Word size data. When using this function, Function slKtableRA ( K_2WORD | K_ON | K_DOT | K_FIX ) slKtableRB ( K_2WORD | K_ON | K_DOT | K_FIX ) Please use together.

example

    slRparaInitSet ( ( void * )( 0x25e5fe00 ) );
    slKtableRA ( ( void * )( 0x25e40000 ), K_2WORD | K_ON | K_DOT | K_FIX );
    slMakeKtable ( ( void * )( 0x25e40000 ) );

    slRparaMode ( K_CHANGE );

reference

slRparaInitSet	slKtableRA	slKtableRB	slRparaReadCtrlRA
slRparaReadCtrlRB	VDP2_KTAOF	k_table_adr

function

slKtableRA

function

slKtableRB

Setting the coefficient table address

Format

    #include "sgl.h"

    void *addr_A;
    Uint16 mode;

    void slKtableRA( addr_A, mode );
    void slKtableRB( addr_A, mode );

argument

    void *addr_A - VRAM address of coefficient table

    Uint16 mode - Coefficient table control mode (described later)

Return number

    void - returns nothing.

function

Set the address of the coefficient table in the register and at the same time write the usage of the coefficient table, Specify the configuration.
The following parameters are included in mode.

        K_OFF | K_ON : Table use
        K_2WORD | K_1WORD : Coefficient data size
        K_MODE0 | K_MODE1 | K_MODE2 | K_MODE3 : Coefficient mode
        K_LINECOL : Line color
        K_DOT | K_LINE : Transformation unit
        K_FIX : Fixed coefficient Change the above value according to the function to be used with "|" Please specify by connecting.

example

    Use mode 0 (pick up the x and y expansion factors from the coefficient table),
    When using a coefficient of 2 in Word mode, per dot.


    #define RBG0RA_RPARA_ADR ( void * )VDP2_VRAM_A0
    void slKtableRA ( RBG0RA_RPARA_ADR, K_ON | K_2WORD | K_MODE0 | K_DOT );

reference

slRparaInitSet	slRparaReadCtrlRA	VDP2_KTCTL	slRparaReadCtrlRB
VDP2_KTAOF	RotScrParA	RotScrParB

function

slRparaReadCtrlRA

function

slRparaReadCtrlRB

Specifying how to read rotation parameters

Format

    #include "sgl.h"

    Uint16 type;

    void slRparaReadCtrlRA( type );
    void slRparaReadCtrlRB( type );

argument

    Uint16 type - How to read rotation parameters (described later).

Return number

    void - returns nothing.

function

Specify whether to reread the rotation parameters Xst, Yst, and KAst for each line.
For type, LnRd_Xst , LnRd_Yst , LnRd_KAst Specify by connecting them with '|'.

example

    slRparaReadCtrlRB ( LnRd_Yst );

reference

slRparaInitSet

slKtableRA

slKtableRB

VDP2_RPRCTL