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