function

slScrPosNbg0

function

slScrPosNbg1

function

slScrPosNbg2

function

slScrPosNbg3

Set the placement coordinates of the normal scroll surface

Form

    #include "sgl.h"

    FIXED pos_x, pos_y;

    void slScrPosNbg0 (pos_x, pos_y);
    void slScrPosNbg1 (pos_x, pos_y);
    void slScrPosNbg2 (pos_x, pos_y);
    void slScrPosNbg3 (pos_x, pos_y);

argument

    FIXED pos_x --X component of normal scroll placement coordinates (scroll coordinate system)
    FIXED pos_y --Y component of normal scroll placement coordinates (scroll coordinate system)

Number of returns

    void --Nothing is returned.

function

    Set the placement coordinates of each normal scroll plane.

Example

    slScrPosNbg0 ( toFIXED (30.0), toFIXED (-19.4));

reference

slScrMoveNbg0	slScrMoveNbg1	slScrMoveNbg2	slScrMoveNbg3
slScrScaleNbg0	slScrScaleNbg1	VDP2_SCXN0	VDP2_SCXIN0
VDP2_SCXDN0	VDP2_SCYN0	VDP2_SCYIN0	VDP2_SCYDN0
VDP2_SCXN2	VDP2_SCYN2	VDP2_SCXN3	Nbg1_PosX
Nbg1_PosY	Nbg2_PosX	Nbg2_PosY	Nbg3_PosX
Nbg3_PosY

function

slScrMoveNbg0

function

slScrMoveNbg1

function

slScrMoveNbg2

function

slScrMoveNbg3

Specify the scroll display position by the amount of movement from the previous position

Form

    #include "sgl.h"

    FIXED pos_x, pos_y;

    void slScrMoveNbg0 (pos_x, pos_y);
    void slScrMoveNbg1 (pos_x, pos_y);
    void slScrMoveNbg2 (pos_x, pos_y);
    void slScrMoveNbg3 (pos_x, pos_y);

argument

    FIXED pos_x --The amount of movement of X from the position before the scroll display position.

    FIXED pos_y --The amount of movement of Y from the position before the scroll display position.

Number of returns

    void --Nothing is returned.

function

    Specify the scroll display position by the amount of movement from the previous position.

    (This function is slScrPosNbg0 , slScrPosNbg1 ,
     Adds to the display position specified by slScrPosNbg2 and slScrPosNbg3)
    The current display position is the system variables Nbg0_PosX , Nbg0_PosY , Nbg1_PosX , 
    Nbg1_PosY , Nbg2_PosX , Nbg2_PosY , Nbg3_PosX , Nbg3_PosY
    Please refer to.

Example

    slScrMoveNbg1 ( toFIXED (1.0), toFIXED (-2.0));

reference

slScrPosNbg0	slScrPosNbg1	slScrPosNbg2	slScrPosNbg2
slScrScaleNbg0	slScrScaleNbg1	slZoomNbg0	slZoomNbg1
VDP2_SCXN0	VDP2_SCXIN0	VDP2_SCXDN0	VDP2_SCYN0
VDP2_SCYIN0	VDP2_SCYDN0	VDP2_SCXN1	VDP2_SCXIN1
VDP2_SCXDN1	VDP2_SCYN1	VDP2_SCYIN1	VDP2_SCYDN1
VDP2_SCXN2	VDP2_SCYN2	VDP2_SCXN3	Nbg1_PosX
Nbg1_PosY	Nbg2_PosX	Nbg2_PosY	Nbg3_PosX
Nbg3_PosY

function

slLookR

Set the placement coordinates of the rotating scroll surface

Form

    #include "sgl.h"

    FIXED pos_x, pos_y;

    void slLookR (pos_x, pos_y);

argument

    FIXED pos_x --X component of rotating scroll placement coordinates (scroll coordinate system)
    FIXED pos_y --Y component of rotating scroll placement coordinates (scroll coordinate system)

Number of returns

    void --Nothing is returned.

function

    Set the placement coordinates of the rotating scroll plane.

Example

    slLookR ( toFIXED (50.0), toFIXED (100.0));

reference

slDispCenterR	slZoomR	slScrScaleR	slZrotR
ScrRotPtr

function

slDispCenterR

Setting the rotation center coordinates of the rotation scroll surface

Form

    #include "sgl.h"

    FIXED pos_x, pos_y;

    void slDispCenterR (pos_x, pos_y);

argument

    FIXED pos_x --Rotation scroll X component of rotation center coordinates (scroll coordinate system)
    FIXED pos_y --Rotation scroll Y component of rotation center coordinates (scroll coordinate system)

Number of returns

    void --Nothing is returned.

function

    Rotation Set the rotation center coordinates of the scroll plane.

Example

    slDispCenterR ( toFIXED (100.0), toFIXED (100.0));

reference

slLookR	slZoomR	slScrScaleR	slZrotR
ScrRotPtr

function

slZoomNbg0

function

slZoomNbg1

Designation of scaling ratio

Form

    #include "sgl.h"

    FIXED scl_x, scl_y;

    void slZoomNbg0 (scl_x, scl_y);
    void slZoomNbg1 (scl_x, scl_y);

argument

    FIXED scl_x --The reciprocal of the scaling factor of normal scroll in the X-axis direction (1/2 if doubled)
    FIXED scl_y --The reciprocal of the scaling factor of normal scroll in the Y-axis direction (1/2 if doubled)

Number of returns

    void --Nothing is returned.

function

    Specifies the scaling ratio of "NBG0,1" that can be scaled on the normal scroll surface.

Example

    Double the X component of NBG0 and halve the Y component.

    slZoomNbg0 ( toFIXED (1/2), toFIXED (2));

caution

    When applying reduction, it is necessary to set the cycle pattern accordingly. At this time, slScrAutoDisp does not support the reduction setting, so it is necessary to set the cycle pattern directly using slScrCycleSet and slScrDisp. For setting the cycle pattern,
      VDP2 User's Manual 3.3 Please see the VRAM access method during the display period.

reference

slScrMoveNbg0	slScrMoveNbg1	slScrMoveNbg2	slScrMoveNbg3
slScrPosNbg0	slScrPosNbg1	slScrPosNbg2	slScrScaleNbg1
slZoomMode	slZoomModeNbg0	slZoomModeNbg1

function

slZoomMode

macro

slZoomModeNbg0

macro

slZoomModeNbg1

Specifying the reduction limit

Form

    #include "sgl.h"

    Uint16 type;
    Uint16 mode;

    void slZoomMode (scrn, mode);
    void slZoomModeNbg0 (type);
    void slZoomModeNbg1 (type);

argument

    Uint16 mode-The face that specifies the zoom (see below).

    Uint16 type --Zoom limit (see below).

Number of returns

    void --Nothing is returned.

function

    Specifies how much NBG0 / NBG1 should be reduced.

    In mode,
        scnNBG0 , scnNBG1
    One of
    type is
        ZOOM_1 , ZOOM_HALF , ZOOM_QUARTER
    Specify one of.

Example

    void slZoomMode ( scnNBG1 , ZOOM_HALF );

caution

    There is a limit on the number of colors when setting the reduction.

    When ZOOM_HALF is specified, only 16-color mode or 256-color mode is specified.

    When ZOOM_QUARTER is specified, only 16-color mode is supported.

    Please note that you cannot set the reduction in other modes.

reference

slScrMoveNbg0	slScrMoveNbg1	slScrMoveNbg2	slScrMoveNbg3
slScrPosNbg0	slScrPosNbg1	slScrPosNbg2	slScrScaleNbg1
slZoomNbg0	slZoomNbg1	VDP2_ZMCTL

function

slZoomR

Setting the scaling ratio of the rotating scroll surface

Form

    #include "sgl.h"

    FIXED scl_x, scl_y;

    void slZoomR (scl_x, scl_y);

argument

    FIXED scl_x --The reciprocal of the scaling factor of the rotary scroll in the X-axis direction (1/2 if doubled)
    FIXED scl_y --The reciprocal of the scaling factor of the rotary scroll in the Y-axis direction (1/2 if doubled)

Number of returns

    void --Nothing is returned.

function

    Sets the scaling factor of the rotating scroll plane and saves the current state in the current rotation parameters.

Example

    slZoomR ( toFIXED (0.5), toFIXED (2.0));

caution

    This function manipulates the current rotation parameters kx and ky.

reference

slLookR	slDispCenterR	slScrScaleR	slZrotR
ScrRotPtr

function

slScrScaleNbg0

function

slScrScaleNbg1

Designation of scaling ratio

Form

    #include "sgl.h"

    FIXED scl_x, scl_y;

    void slScrScaleNbg0 (scl_x, scl_y);
    void slScrScaleNbg1 (scl_x, scl_y);

argument

    FIXED scl_x --Scale ratio of normal scroll in the X-axis direction (2 if doubled)
    FIXED scl_y --Scale ratio of normal scroll in the Y-axis direction (2 if doubled)

Number of returns

    void --Nothing is returned.

function

    Specifies the scaling ratio of "NBG0,1" that can be scaled on the normal scroll surface.

Example

    slScrScaleNbg1 ( toFIXED (2), toFIXED (1/3));

caution

    When applying reduction, it is necessary to set the cycle pattern accordingly. At this time, slScrAutoDisp does not support the reduction setting, so it is necessary to set the cycle pattern directly using slScrCycleSet and slScrDisp. For setting the cycle pattern,
      VDP2 User's Manual 3.3 Please see the VRAM access method during the display period.

reference

slScrMoveNbg0	slScrMoveNbg1	slScrMoveNbg2	slScrMoveNbg3
slScrPosNbg0	slScrPosNbg1	slScrPosNbg2	slZoomModeNbg0
slZoomModeNbg1	slZoomNbg0	slZoomNbg1

function

slScrScaleR

Setting the scaling ratio of the rotating scroll surface

Form

    #include "sgl.h"

    FIXED scl_x, scl_y;

    void slScrScaleR (scl_x, scl_y);

argument

    FIXED scl_x --Rotating scroll scaling factor in the X-axis direction (2 if doubled)
    FIXED scl_y --Rotating scroll scaling factor in the Y-axis direction (2 if doubled)

Number of returns

    void --Nothing is returned.

function

    Sets the scaling factor of the rotating scroll plane and saves the current state in the current rotation parameters.

Example

    slScrScaleR ( toFIXED (2.0), toFIXED (1.0));

reference

slLookR	slZoomR	slDispCenterR	slZrotR
ScrRotPtr

function

slScrMatConv

Convert current matrix to scrollable matrix

Form

    #include "sgl.h"

    void slScrMatConv (void)

argument

    void --Do not give anything.

Number of returns

    void --Nothing is returned.

function

    Converts the current matrix to a scrollable matrix.

    The current matrix can be rewritten by using this function.

Example

    slUnitMatrix ( CURRENT );
    slRotX ( debugtoANG (10.0));
    slRotZ ( debugtoANG (10.0));
    slTranslate (...);
    slScrMatConv ();
    slScrMatSet ();

caution

    After that, by executing the slScrMatSet function, it will be reflected in the parameters of the rotation scroll.

reference

slScrMatSet	slZrotR	slInitMatrix	slPushMatrix
slPushUnitMatrix	slIncMatrixPtr	slPopMatrix	slDecMatrixPtr
slUnitMatrix	slUnitAngle	slUnitTranslate	slLoadMatrix
slCopyMatrix	slRegistMatrix	slGetMatrix	slGetTranslate
slLoadTranslate	slInversMatrix	slTransposeMatrix	mtptr

function

slScrTransparent

Specify how to handle the transparent color of each scroll surface

Form

    #include "sgl.h"

    Uint16 mode;

    void slScrTransparent (mode);

argument

    Uint16 mode --Transparent color setting surface (multiple can be specified with'|')

Number of returns

    void --Nothing is returned.

function

    Specifies how to handle the transparent color of each scroll surface.

    In mode,
        NBG0ON , NBG1ON , NBG2ON , NBG3ON , RBG0ON
    Is entered.

    If you want to set the drawing settings for multiple scroll planes at the same time, specify the mode of each plane by connecting them with "|".

    The space on the scroll surface specified as ON is displayed in the color of palette 0.

Example

    Set NBG2 to transparent color setting.

    slScrTransparent ( NBG2ON );

reference

VDP2_BGON

function

slZrotR

Z-axis rotation of rotary scroll

Form

    #include "sgl.h"

    ANGLE angz;
    void slZrotR (angz);

argument

    ANGLE angz --Rotation angle value of rotation scroll with respect to Z axis

Number of returns

    void --Nothing is returned.

function

    Rotates the Z-axis of the scroll. The positive direction of rotation is to the right (clockwise) with respect to the axis. The coordinates specified by the function slDispCenterR are
    It becomes the center of rotation.

Example

    Rotate the scroll around the Z axis by 30 degrees, counterclockwise.

    slZrotR ( debugtoANG (30.0));

reference

slLookR	slZoomR	slDispCenterR	slScrScaleR
ScrRotPtr

function

slScrMatSet

Set the rotation parameter of RBG0

Form

    #include "sgl.h"

    void slScrMatSet ();

argument

    void --Do not give anything.

Number of returns

    void --Nothing is returned.

function

    Set the rotation parameter of RBG0 using the current matrix.

Example

    Set the rotation parameters of RBG0 using the current matrix.

    slPushMatrix ();
    {
      slRotY (...);
      slTranslate (...);
      slScrMatSet ();
    }
    slPopMatrix ();

reference

slScrMatConv	slZrotR	slInitMatrix	slPushMatrix
slPushUnitMatrix	slIncMatrixPtr	slPopMatrix	slDecMatrixPtr
slUnitMatrix	slUnitAngle	slUnitTranslate	slLoadMatrix
slCopyMatrix	slRegistMatrix	slGetMatrix	slGetTranslate
slLoadTranslate	slInversMatrix	slTransposeMatrix	mtptr
MsScreenSizeX	MsScreenSizeY	Resolution	VDP2_KTCTL
VDP2_KTAOF	ScrRotPtr	k_table_adr