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kolibrios/programs/develop/libraries/TinyGL/asm_fork/glu.asm
IgorA ea910a143c 1) fix and optimizations 
2) add quadric object 'Sphere'

git-svn-id: svn://kolibrios.org@5218 a494cfbc-eb01-0410-851d-a64ba20cac60
2014-12-05 21:12:56 +00:00

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struct GLUquadricObj
DrawStyle dd ? ; GLU_FILL, LINE, SILHOUETTE, or POINT
Orientation dd ? ; GLU_INSIDE or GLU_OUTSIDE
TextureFlag dd ? ; Generate texture coords?
Normals dd ? ; GLU_NONE, GLU_FLAT, or GLU_SMOOTH
ErrorFunc dd ? ; Error handler callback function
ends
offs_qobj_DrawStyle equ 0
offs_qobj_Orientation equ 4
offs_qobj_TextureFlag equ 8
offs_qobj_Normals equ 12
offs_qobj_ErrorFunc equ 16
;void drawTorus(float rc, int numc, float rt, int numt)
;{
;}
;static void normal3f(GLfloat x, GLfloat y, GLfloat z )
;{
;}
;void gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
;{
;}
;void gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez,
; GLdouble centerx, GLdouble centery, GLdouble centerz,
; GLdouble upx, GLdouble upy, GLdouble upz)
;{
;}
align 4
gluNewQuadric:
stdcall gl_malloc, sizeof.GLUquadricObj
or eax,eax
jz @f
mov dword[eax+offs_qobj_DrawStyle],GLU_FILL
mov dword[eax+offs_qobj_Orientation],GLU_OUTSIDE
mov dword[eax+offs_qobj_TextureFlag],GL_FALSE
mov dword[eax+offs_qobj_Normals],GLU_SMOOTH
mov dword[eax+offs_qobj_ErrorFunc],0 ;NULL
@@:
ret
align 4
proc gluDeleteQuadric, state:dword
cmp dword[state],0
je @f
stdcall gl_free,[state]
@@:
ret
endp
;void gluQuadricDrawStyle(GLUquadricObj *obj, int style)
;{
;}
;void gluCylinder(GLUquadricObj *qobj, GLdouble baseRadius, GLdouble topRadius, GLdouble height, GLint slices, GLint stacks )
;{
;}
; Disk (adapted from Mesa)
;void gluDisk(GLUquadricObj *qobj, GLdouble innerRadius, GLdouble outerRadius, GLint slices, GLint loops )
;{
;}
;
; Sphere (adapted from Mesa)
;
;input:
; float radius, int slices, int stacks
align 4
proc gluSphere qobj:dword, radius:dword, slices:dword, stacks:dword
locals
rho dd ? ;float
drho dd ?
theta dd ?
dtheta dd ?
x dd ? ;float
y dd ? ;float
z dd ? ;float
s dd ? ;float
t dd ? ;float
d_s dd ? ;float
d_t dd ? ;float
i dd ? ;int
j dd ? ;int
imax dd ? ;int
normals dd ? ;int
nsign dd ? ;float
endl
pushad
mov eax,[qobj]
cmp dword[eax+offs_qobj_Normals],GLU_NONE ;if (qobj.Normals==GLU_NONE)
jne .els_0
mov dword[normals],GL_FALSE
jmp @f
.els_0:
mov dword[normals],GL_TRUE
@@:
cmp dword[eax+offs_qobj_Orientation],GLU_INSIDE ;if (qobj.Orientation==GLU_INSIDE)
jne .els_1
mov dword[nsign],-1.0
jmp @f
.els_1:
mov dword[nsign],1.0
@@:
fldpi
fidiv dword[stacks]
fstp dword[drho]
fld1
fldpi
fscale
fidiv dword[slices]
fstp dword[dtheta]
ffree st0
fincstp
; draw +Z end as a triangle fan
stdcall glBegin,GL_TRIANGLE_FAN
cmp dword[normals],GL_TRUE
jne @f
stdcall glNormal3f, 0.0, 0.0, 1.0
@@:
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je @f
;glTexCoord2f(0.5,0.0)
@@:
sub esp,4
fld dword[nsign]
fmul dword[radius]
fstp dword[esp]
stdcall glVertex3f, 0.0, 0.0 ;, nsign * radius
fld dword[drho]
fcos
fmul dword[nsign]
fstp dword[z] ;z = nsign * cos(drho)
mov dword[j],0
mov ecx,[slices]
align 4
.cycle_0: ;for (j=0;j<=slices;j++)
cmp dword[j],ecx
jg .cycle_0_end
fld dword[drho]
fsin
je @f
fild dword[j]
fmul dword[dtheta]
jmp .t0_end
@@:
fldz
.t0_end:
fst dword[theta] ;theta = (j==slices) ? 0.0 : j * dtheta
fsin
fchs
fmul st0,st1
fstp dword[x] ;x = -sin(theta) * sin(drho)
fld dword[theta]
fcos
fmulp
fstp dword[y] ;y = cos(theta) * sin(drho)
cmp dword[normals],GL_TRUE
jne @f
fld dword[nsign]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
stdcall glNormal3f ;x*nsign, y*nsign, z*nsign
@@:
fld dword[radius]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
call glVertex3f ;x*radius, y*radius, z*radius
inc dword[j]
jmp .cycle_0
.cycle_0_end:
stdcall glEnd
fld1
fidiv dword[slices]
fstp dword[d_s] ;1.0 / slices
fld1
fidiv dword[stacks]
fstp dword[d_t] ;1.0 / stacks
mov dword[t],1.0 ; because loop now runs from 0
mov ebx,[stacks]
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je .els_2
mov dword[i],0
mov [imax],ebx
jmp @f
.els_2:
mov dword[i],1
dec ebx
mov [imax],ebx
@@:
; draw intermediate stacks as quad strips
mov ebx,[imax]
align 4
.cycle_1: ;for (i=imin;i<imax;i++)
cmp dword[i],ebx
jge .cycle_1_end
fild dword[i]
fmul dword[drho]
fstp dword[rho] ;rho = i * drho
stdcall glBegin,GL_QUAD_STRIP
mov dword[s],0.0
mov dword[j],0
align 4
.cycle_2: ;for (j=0;j<=slices;j++)
cmp dword[j],ecx
jg .cycle_2_end
fld dword[rho]
fsin
je @f
fild dword[j]
fmul dword[dtheta]
jmp .t1_end
@@:
fldz
.t1_end:
fst dword[theta] ;theta = (j==slices) ? 0.0 : j * dtheta
fsin
fchs
fmul st0,st1
fstp dword[x] ;x = -sin(theta) * sin(rho)
fld dword[theta]
fcos
fmulp
fstp dword[y] ;y = cos(theta) * sin(rho)
fld dword[rho]
fcos
fmul dword[nsign]
fstp dword[z] ;z = nsign * cos(rho)
cmp dword[normals],GL_TRUE
jne @f
fld dword[nsign]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
stdcall glNormal3f ;x*nsign, y*nsign, z*nsign
@@:
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je @f
;glTexCoord2f(s,1-t)
@@:
fld dword[radius]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
call glVertex3f ;x*radius, y*radius, z*radius
fld dword[rho]
fadd dword[drho]
fsin ;st0 = sin(rho+drho)
fld dword[theta]
fsin
fchs
fmul st0,st1
fstp dword[x] ;x = -sin(theta) * sin(rho+drho)
fld dword[theta]
fcos
fmulp
fstp dword[y] ;y = cos(theta) * sin(rho+drho)
fld dword[rho]
fadd dword[drho]
fcos
fmul dword[nsign]
fstp dword[z] ;z = nsign * cos(rho+drho)
cmp dword[normals],GL_TRUE
jne @f
fld dword[nsign]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
stdcall glNormal3f ;x*nsign, y*nsign, z*nsign
@@:
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je @f
;glTexCoord2f(s,1-(t-dt))
fld dword[s]
fadd dword[d_s]
fstp dword[s]
@@:
fld dword[radius]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
call glVertex3f ;x*radius, y*radius, z*radius
inc dword[j]
jmp .cycle_2
.cycle_2_end:
stdcall glEnd
fld dword[t]
fsub dword[d_t]
fstp dword[t]
inc dword[i]
jmp .cycle_1
.cycle_1_end:
; draw -Z end as a triangle fan
stdcall glBegin,GL_TRIANGLE_FAN
cmp dword[normals],GL_TRUE
jne @f
stdcall glNormal3f, 0.0, 0.0, -1.0
@@:
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je @f
;glTexCoord2f(0.5,1.0)
mov dword[s],1.0
mov ebx,[d_t]
mov [t],ebx
@@:
sub esp,4
fld dword[radius]
fchs
fmul dword[nsign]
fstp dword[esp]
stdcall glVertex3f, 0.0, 0.0 ;, -radius*nsign
fldpi
fsub dword[drho]
fst dword[rho]
fcos
fmul dword[nsign]
fstp dword[z] ;z = nsign * cos(rho)
mov [j],ecx
.cycle_3: ;for (j=slices;j>=0;j--)
cmp dword[j],0
jl .cycle_3_end
fld dword[rho]
fsin
je @f
fild dword[j]
fmul dword[dtheta]
jmp .t2_end
@@:
fldz
.t2_end:
fst dword[theta] ;theta = (j==slices) ? 0.0 : j * dtheta
fsin
fchs
fmul st0,st1
fstp dword[x] ;x = -sin(theta) * sin(rho)
fld dword[theta]
fcos
fmulp
fstp dword[y] ;y = cos(theta) * sin(rho)
cmp dword[normals],GL_TRUE
jne @f
fld dword[nsign]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
stdcall glNormal3f ;x*nsign, y*nsign, z*nsign
@@:
cmp dword[eax+offs_qobj_TextureFlag],0 ;if (qobj.TextureFlag)
je @f
;glTexCoord2f(s,1-t)
fld dword[s]
fsub dword[d_s]
fstp dword[s]
@@:
fld dword[radius]
fld dword[z]
fmul st0,st1
fstp dword[esp-4]
fld dword[y]
fmul st0,st1
fstp dword[esp-8]
fld dword[x]
fmul st0,st1
fstp dword[esp-12]
sub esp,12
ffree st0
fincstp
call glVertex3f ;x*radius, y*radius, z*radius
dec dword[j]
jmp .cycle_3
.cycle_3_end:
stdcall glEnd
popad
ret
endp
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