ビデオ - ジオメトリエンジン

名前	幅	アドレス	説明
NOP	32	0x04000400	No-operation
MATRIX_CONTROL	32	0x04000440	Matrix control register
MATRIX_PUSH	32	0x04000444	Matrix push
MATRIX_POP	32	0x04000448	Matrix pop
MATRIX_STORE	32	0x0400044C	Matrix store
MATRIX_RESTORE	32	0x04000450	Matrix restore
MATRIX_IDENTITY	32	0x04000454	Load identity matrix
MATRIX_LOAD4x4	32	0x04000458	Load 4x4 matrix write port
MATRIX_LOAD4x3	32	0x0400045C	Load 4x3 matrix write port
MATRIX_MULT4x4	32	0x04000460	Multiply 4x4 matrix write port
MATRIX_MULT4x3	32	0x04000464	Multiply 4x3 matrix write port
MATRIX_MULT3x3	32	0x04000468	Multiply 3x3 matrix write port
MATRIX_SCALE	32	0x0400046C	Scale matrix write port
MATRIX_TRANSLATE	32	0x04000470	Translate matrix write port
MATRIX_READ_PROJECTION	32	0x04000640	Read port for projection matrix
MATRIX_READ_ROTATION	32	0x04000680	Read port for ?rotation? matrix
POINT_RESULT	32	0x04000620	.
VECTOR_RESULT	16	0x04000630	.
GFX_COLOR	32	0x04000480	Set color
GFX_NORMAL	32	0x04000484	Set normal
GFX_TEX_COORD	32	0x04000488	Set texture coordinate
GFX_VERTEX16	32	0x0400048C	Vertex write port
GFX_VERTEX10	32	0x04000490	Vertex write port
GFX_VERTEX_XY	32	0x04000494	Vertex write port
GFX_VERTEX_XZ	32	0x04000498	Vertex write port
GFX_VERTEX_YZ	32	0x0400049C	Vertex write port
GFX_VERTEX_DIFF	32	0x040004A0	Vertex write port
GFX_BEGIN	32	0x04000500	Begin a primitive
GFX_END	32	0x04000504	End a primitive
GFX_BOX_TEST	32	0x040005C0	.

GFX_BEGIN

Starts the processing of primitives.
31..2 ?
1..0 Type (00: Triangles, 01: Quads, 10: Triangle Strip, 11: Quad Strip)

GFX_END

Stops the processing of primitives / finalizes them.

Just like OpenGL, you should only issue vertex commands in between a begin / end pair.

libnds function calls associated with these registers:

   * glBegin
   * glEnd 

MATRIX_TRANSLATE

Three writes multiples the current matrix with a translate matrix of the form:
1.0 0.0 0.0 write1
0.0 1.0 0.0 write2
0.0 0.0 1.0 write3
0.0 0.0 0.0 1.0

libnds function calls associated with these registers:

   * glTranslatev
   * glTranslate3f32
   * glTranslatef32
   * glTranslatef 

MATRIX_SCALE

Three writes multiples the current matrix with a scale matrix of the form:
write1 0.0 0.0 0.0
0.0 write2 0.0 0.0
0.0 0.0 write3 0.0
0.0 0.0 0.0 1.0

libnds function calls associated with these registers:

   * glScalev
   * glScalef32
   * glScalef 

MATRIX_MULT3x3

After 9 writes, the current matrix is multipled by a 3x3 matrix formed from the writes.

MATRIX_MULT4x3

After 12 writes, the current matrix is multipled by a 4x3 matrix formed from the writes.

MATRIX_MULT4x4

After 16 writes, the current matrix is multipled by a 3x3 matrix formed from the writes.

libnds function calls associated with these registers:

   * glMultMatrix3x3
   * glMultMatrix4x3
   * glMultMatrix4x4 

MATRIX_LOAD4x4

Write port to the 4x4 matrix hardware (f32 format).

MATRIX_LOAD4x3

Write port to the 4x4 matrix hardware (f32 format). After 12 writes, the last 4 elements of the matrix are set to 0.0 0.0 0.0 1.0.

libnds function calls associated with these registers:

• glLoadMatrix4x3
• glLoadMatrix4x4
• Various other routines use them behind the scenes.

libnds fixed point / floating point / integer conversion routines:

• intof32 (integer -> f32)
• floatof32 (float -> f32)
• inttot16 (integer -> t16)
• floattot16 (float -> t16)
• inttov16 (integer -> v16)
• floattov16 (float -> v16)
• inttov10 (integer -> v10)
• floattov10 (float -> v10)

• • • • @wikiへ