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