SEGA3D file specifications

"
    SEGA 3D
”

◆Purpose

File type identification.

◆Terms

Must exist at the beginning of the file.

"
    model model name
    {
        vertices ;number of vertices
        {    
            (x0,y0,z0),(nx0,ny0,nz0) ;0
            (x1,y1,z1),(nx1,ny1,nz1);1
            .......... ;2
        }
        polygons ;number of polygons
        {
            (v0,v1,v2,v3),(Nx,Ny,Nz),(Zpos) ;0
            ....... ;1
        }
    }
”

◆Purpose

Set the vertices and polygon structure of the 4-point polygon model.

◆Reserved words

model	: Control structure
vertices	: Control structure
polygons	: Control structure

◆Data

model name	: Model name
(Xn,Yn,Zn)	: Each vertex coordinate
(nx0,ny0,nz0)	: Each vertex normal vector (unit vector)
(v0,v1,v2,v3)	: Vertex numbers that make up the surface
(Nx,Ny,Nz)	: Surface normal vector
(Zpos)	: Z sort criteria (AVE=Center/MIN=Recent/MAX=Farthest)

◆Terms

The order of the vertices that make up the surface is "clockwise."

0         1
 ┌───────┐ 
 │   →   │ 
 │       │ 
 │↑     ↓│ 
 │       │ 
 │   ←   │ 
 └───────┘ 
3         2

When representing a triangle, v2 and v3 should be the same number.

"
    slips model name
    {
        materialname_0
        materialname_1
        ......
    }
”

◆Purpose

Match the material to the surface structure of each model.

◆Reserved words

slips

: Control structure

◆Data

model name	: Compatible model name
materialname_n	: Compatible material name

◆Terms

Each material name corresponds to a surface number included in the corresponding model.

"
    material materialname
    {
        type (TYPE0|TYPE1|...)
        texture "textureName"
        color ColorCode
        gouraud offset
        direction 0,1,2,3
    }
”

◆Purpose

Set the surface attributes assigned to each surface.

◆Reserved words

material	: Control structure
type	: Reserved word
texture	: Reserved word
color	: Reserved word
gouraud	: Reserved word
direction	: Reserved word

◆Data

materialname	: Material name
(TYPEn)	: Material type. Specify methods such as shading mapping.
	→ NULL=none
	FLAT=Flat shading
	TEXT=Texture mapping
	GOUR=Goureau shading
	MESH=Mesh display
	TRAN=translucent
	SHAD=half brightness
	*For multiple specifications, connect them with '|'.
"textureName"	: Texture map file name
ColorCode	: Non-texture color code (RGB each 5bit=1b.B5.G5.R5)
offset	: Gouraud color offset=0x10. Unused data.
0,1,2,3	: Correspondence to each vertex of the texture map. Display direction.
	→ [0,1,2,3]=Normal display
	[1,0,3,2]=H reverse display
	[3,2,1,0]=V reverse display
	[2,3,0,1]=HV reverse display
	[1,2,3,0]=90 degree rotation normal display
	[2,1,0,3]=90 degree rotation H reverse display
	[0,3,2,1]=90 degree rotation V reverse display
	[3,0,1,2]=90 degree rotation HV reverse display

"
    object objectname
    {
        modelname_0,(xs,ys,zs),(xd,yd,zd),(xt,yt,zt),(xi,yi,zi)
        {
        }
        modelname_1,(xs,ys,zs),(xd,yd,zd),(xt,yt,zt),(xi,yi,zi)
        {
            modelname_2,(xs,ys,zs),(xd,yd,zd),(xt,yt,zt),(xi,yi,zi)
            {
                modelname_4,(xs,ys,zs),(xd,yd,zd),(xt,yt,zt),(xi,yi,zi)
                {
                }
            }
            modelname_3,(xs,ys,zs),(xd,yd,zd),(xt,yt,zt),(xi,yi,zi)
            {
            }
        }
        ......................................
        ......................................
    }
”

◆Purpose

Set the hierarchical matrix structure for each model.

◆Reserved words

object

: Control structure

◆Data

objectname	: Object name (=file name)
modelname_n	: Model name
(xs,ys,zs)	: Scale (ratio)
(xd,yd,zd)	: Rotate (Angle: -180.0 ~ +179.0)
(xt,yt,zt)	: Translation (coordinates)
(xi,yi,zi)	: Currently unused = (0,0,0)

"
    light
    {
        vector n ;number of light
        {
            (X0, Y0, Z0) ;0
            (X1, Y1, Z1) ;1
            .........
        }
    }
”

◆Purpose

Set the light source vector.

◆Reserved words

light	: Control structure
vector	: Control structure

◆Data

(Xn,Yn,Zn)

: Unit vector of light source

"
    attribute model name
    {
        {
            type (TYPE0|TYPE1|...)
            texture "textureName"
            color ColorCode1, ColorCode2
            gour_color (R1,G1,B1),(R2,G2,B2),(R3,G3,B3),(R4,G4,B4)
            direction 0,1,2,3
            zsort (Zpos)
        }
        {
            .....
        }
        ..........
        ..........
    }
”

◆Purpose

Set attributes to be assigned to each face of the model.

◆Reserved words

attribute	: Control structure
type	: Reserved word
texture	: Reserved word
color	: Reserved word
gour_color	: Reserved word
direction	: Reserved word

◆Data

model name	: Model name
(TYPEn)	: Material type (same as material data).
	Specify methods such as shading mapping.
	→ NULL=none
	FLAT=Flat shading
	TEXT=Texture mapping
	GOUR=Goureau shading
	MESH=Mesh display
	TRAN=translucent
	SHAD=half brightness
	*For multiple specifications, connect them with '|'.
"textureName"	: Texture map file name
ColorCode1	: Non-texture color code set to material
	(RGB each 5bit=1b.B5.G5.R5)
ColorCode2	: Non-textured color code calculated by the current light source
	(RGB each 5bit=1b.B5.G5.R5)
(Rn,Gn,Bn)	: 4-vertex Gouraud table calculated by the current light source
0,1,2,3	: Correspondence to each vertex of the texture map. Display direction.
	→ [0,1,2,3]=Normal display
	[1,0,3,2]=H reverse display
	[3,2,1,0]=V reverse display
	[2,3,0,1]=HV reverse display
	[1,2,3,0]=90 degree rotation normal display
	[2,1,0,3]=90 degree rotation H reverse display
	[0,3,2,1]=90 degree rotation V reverse display
	[3,0,1,2]=90 degree rotation HV reverse display
(Zpos)	: Z sort criteria (AVE=Center/MIN=Recent/MAX=Farthest