kolibrios/programs/demos/3DS/3DMATH.INC
Kirill Lipatov (Leency) 7fa293ff87 3ds view 0.62: edges only viewing model, drawing lines with "smooth_line" procedure.
git-svn-id: svn://kolibrios.org@2881 a494cfbc-eb01-0410-851d-a64ba20cac60
2012-07-19 10:30:38 +00:00

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x3d equ 0
y3d equ 2
z3d equ 4
vec_x equ 0
vec_y equ 4
vec_z equ 8
; 3d point - triple integer word coordinate
; vector - triple float dword coordinate
;----------------------in: --------------------------------
;------------------------ esi - pointer to 1st 3d point ---
;------------------------ edi - pointer to 2nd 3d point ---
;------------------------ ebx - pointer to result vector --
;---------------------- out : none ------------------------
if 0
make_vector:
fninit
fild word[edi+x3d] ;edi+x3d
fisub word[esi+x3d] ;esi+x3d
fstp dword[ebx+vec_x]
fild word[edi+y3d]
fisub word[esi+y3d]
fstp dword[ebx+vec_y]
fild word[edi+z3d]
fisub word[esi+z3d]
fstp dword[ebx+vec_z]
ret
end if
make_vector_r:
fninit
fld dword[edi] ;edi+x3d
fsub dword[esi] ;esi+x3d
fstp dword[ebx+vec_x]
fld dword[edi+4]
fsub dword[esi+4]
fstp dword[ebx+vec_y]
fld dword[edi+8]
fsub dword[esi+8]
fstp dword[ebx+vec_z]
ret
;---------------------- in: -------------------------------
;--------------------------- esi - pointer to 1st vector --
;--------------------------- edi - pointer to 2nd vector --
;--------------------------- ebx - pointer to result vector
;---------------------- out : none
cross_product:
fninit
fld dword [esi+vec_y]
fmul dword [edi+vec_z]
fld dword [esi+vec_z]
fmul dword [edi+vec_y]
fsubp ;st1 ,st
fstp dword [ebx+vec_x]
fld dword [esi+vec_z]
fmul dword [edi+vec_x]
fld dword [esi+vec_x]
fmul dword [edi+vec_z]
fsubp ;st1 ,st
fstp dword [ebx+vec_y]
fld dword [esi+vec_x]
fmul dword [edi+vec_y]
fld dword [esi+vec_y]
fmul dword [edi+vec_x]
fsubp ;st1 ,st
fstp dword [ebx+vec_z]
ret
;----------------------- in: ------------------------------
;---------------------------- edi - pointer to vector -----
;----------------------- out : none
normalize_vector:
fninit
fld dword [edi+vec_x]
fmul st, st
fld dword [edi+vec_y]
fmul st, st
fld dword [edi+vec_z]
fmul st, st
faddp st1, st
faddp st1, st
fsqrt
ftst
fstsw ax
sahf
jnz @f
fst dword [edi+vec_x]
fst dword [edi+vec_y]
fstp dword [edi+vec_z]
ret
@@:
fld st
fld st
fdivr dword [edi+vec_x]
fstp dword [edi+vec_x]
fdivr dword [edi+vec_y]
fstp dword [edi+vec_y]
fdivr dword [edi+vec_z]
fstp dword [edi+vec_z]
ret
;------------------in: -------------------------
;------------------ esi - pointer to 1st vector
;------------------ edi - pointer to 2nd vector
;------------------out: ------------------------
;------------------ st0 - dot-product
dot_product:
fninit
fld dword [esi+vec_x]
fmul dword [edi+vec_x]
fld dword [esi+vec_y]
fmul dword [edi+vec_y]
fld dword [esi+vec_z]
fmul dword [edi+vec_z]
faddp
faddp
ret
; DOS version Coded by Mikolaj Felix aka Majuma
; mfelix@polbox.com
; www.majuma.xt.pl
; into FASM translation by Macgub
init_sincos_tab:
.counter equ dword [ebp-4] ; cur angle
push ebp
mov ebp,esp
xor eax,eax
push eax ; init .counter
mov edi,cos_tab
mov esi,sin_tab
mov ecx,256
fninit
fld .counter
@@:
fld st
fsincos
fstp dword [edi]
fstp dword [esi]
; fadd [piD180]
fadd [piD128]
add esi,4
add edi,4
loop @b
ffree st
mov esp,ebp
pop ebp
ret
;------
; esi - offset (pointer) to angles, edi offset to 3x3 matrix
make_rotation_matrix:
.sinx equ dword[ebp-4]
.cosx equ dword[ebp-8]
.siny equ dword[ebp-12]
.cosy equ dword[ebp-16]
.sinz equ dword[ebp-20]
.cosz equ dword[ebp-24]
push ebp
mov ebp,esp
sub esp,24
movzx ebx,word[esi]
shl ebx,2
mov eax,dword[sin_tab+ebx]
mov .sinx,eax
mov edx,dword[cos_tab+ebx]
mov .cosx,edx
movzx ebx,word[esi+2]
shl ebx,2
mov eax,dword[sin_tab+ebx]
mov .siny,eax
mov edx,dword[cos_tab+ebx]
mov .cosy,edx
movzx ebx,word[esi+4]
shl ebx,2
mov eax,dword[sin_tab+ebx]
mov .sinz,eax
mov edx,dword[cos_tab+ebx]
mov .cosz,edx
fninit
fld .cosy
fmul .cosz
fstp dword[edi]
fld .sinx
fmul .siny
fmul .cosz
fld .cosx
fmul .sinz
fchs
faddp
fstp dword[edi+12]
fld .cosx
fmul .siny
fmul .cosz
fld .sinx
fmul .sinz
faddp
fstp dword[edi+24]
fld .siny
fmul .sinz
fstp dword[edi+4]
fld .sinx
fmul .siny
fmul .sinz
fld .cosx
fmul .cosz
faddp
fstp dword[edi+16]
fld .cosx
fmul .siny
fmul .sinz
fld .sinx
fchs
fmul .cosz
faddp
fstp dword[edi+28]
fld .siny
fchs
fstp dword[edi+8]
fld .cosy
fmul .sinx
fstp dword[edi+20]
fld .cosx
fmul .cosy
fstp dword[edi+32]
mov esp,ebp
pop ebp
ret
;---------------------
; in: esi - ptr to points(normals], each point(normal) coeficient as dword
; edi - ptr to rotated points(normals)
; ebx - ptr to 3x3 (9 dwords, 36 bytes) rotation matrix
; ecx - number of points(normals)
rotary:
if Ext<SSE
fninit
.again:
fld dword[esi]
fmul dword[ebx]
fld dword[esi+4]
fmul dword[ebx+12]
faddp
fld dword[esi+8]
fmul dword[ebx+24]
faddp
fstp dword[edi]
fld dword[esi+4]
fmul dword[ebx+16]
fld dword[esi]
fmul dword[ebx+4]
faddp
fld dword[esi+8]
fmul dword[ebx+28]
faddp
fstp dword[edi+4]
fld dword[esi+8]
fmul dword[ebx+32]
fld dword[esi]
fmul dword[ebx+8]
fld dword[esi+4]
fmul dword[ebx+20]
faddp
faddp
fstp dword[edi+8]
add esi,12
add edi,12
loop .again
mov [edi],dword -1
else
; Copyright (C) 1999-2001 Brian Paul
; Copyright (C) Maciej Guba
;---------------------
; in: esi - ptr to points(normals], each point(normal) coeficient as dword
; edi - ptr to rotated points(normals)
; ebx - ptr to 3x3 (9 dwords, 36 bytes) rotation matrix
; ecx - number of points(normals)
;align 32
movups xmm4,[ebx]
; lddqu xmm4,[ebx] ; I tried sse3 :D
movups xmm5,[ebx+12]
movups xmm6,[ebx+24]
;align 32
.again:
movss xmm0,dword[esi]
shufps xmm0,xmm0,0
mulps xmm0,xmm4
movss xmm1,dword[esi+4]
shufps xmm1,xmm1,0
mulps xmm1,xmm5
movss xmm2,dword[esi+8]
shufps xmm2,xmm2,0
mulps xmm2,xmm6
addps xmm0,xmm1
addps xmm0,xmm2
movups [edi],xmm0
add esi,12
add edi,12
dec ecx
jne .again
mov [edi],dword -1
end if
ret
;----------------------------------------------
; esi - pointer to 3x3 matrix
add_scale_to_matrix:
fninit
fld [rsscale]
fld dword[esi] ;-----
fmul st,st1
fstp dword[esi]
fld dword[esi+12] ; x scale
fmul st,st1
fstp dword[esi+12]
fld dword[esi+24]
fmul st,st1
fstp dword[esi+24] ;------
fld dword[esi+4] ;-----
fmul st,st1
fstp dword[esi+4]
fld dword[esi+16] ; y scale
fmul st,st1
fstp dword[esi+16]
fld dword[esi+28]
fmul st,st1
fstp dword[esi+28] ;------
fld dword[esi+8] ;-----
fmul st,st1
fstp dword[esi+8]
fld dword[esi+20] ; z scale
fmul st,st1
fstp dword[esi+20]
fld dword[esi+32]
fmulp st1,st
fstp dword[esi+32] ;------
ret
;in esi - offset to 3d points (point as 3 dwords float)
; edi - offset to 2d points ( as 3 words integer)
; ecx - number of points
translate_points: ; just convert into integer; z coord still needed
fninit
.again:
fld dword[esi+8]
; fmul [rsscale]
fist word[edi+4]
fisub [zobs]
fchs
fld dword[esi]
; fmul [rsscale]
fisub [xobs]
fimul [zobs]
fdiv st0,st1
fiadd [xobs]
fiadd [vect_x]
fistp word[edi]
fld dword[esi+4]
; fmul [rsscale]
fisub [yobs]
fimul [zobs]
fdivrp ; st0,st1
fiadd [yobs]
fiadd [vect_y]
fistp word[edi+2]
add esi,12
add edi,6
dec ecx
jnz .again
ret