WebSVN – Kolibri OS – Blame – /programs/develop/libraries/TinyGL/asm_fork/light.asm

Rev	Author	Line No.	Line
5153	IgorA	1
		2	proc glopMaterial uses eax ebx ecx edi esi, context:dword, p:dword
5256	IgorA	3	; edi -> GLMaterial *m
		4	mov eax,[context]
		5	mov ebx,[p]
		6	mov ecx,[ebx+4] ;ecx = p[1]
		7
5153	IgorA	8
5256	IgorA	9	jne @f
		10	mov dword[ebx+4],GL_FRONT ;p[1].i=GL_FRONT
		11	mov edi,ebp
		12	add edi,12
		13	stdcall glopMaterial,eax,edi
		14	mov ecx,GL_BACK
		15	@@:
		16	mov edi,[eax+offs_cont_materials]
		17	cmp ecx,GL_FRONT ;if (mode == GL_FRONT) m=&context.materials[0]
		18	je @f
		19	add edi,sizeof.GLMaterial ;else m=&context.materials[1]
		20	@@:
		21
5153	IgorA	22
5256	IgorA	23	mov esi,ebx ;esi = &p
		24	add esi,12 ;esi = &p[3]
		25	mov ebx,[ebx+8] ;ebx = p[2]
		26	cmp ebx,GL_EMISSION
		27	jne @f
		28	;add edi,offs_mate_emission ;offs_mate_emission=0
		29	rep movsd
		30	jmp .end_f
		31	@@:
		32	cmp ebx,GL_AMBIENT
		33	jne @f
		34	add edi,offs_mate_ambient
		35	rep movsd
		36	jmp .end_f
		37	@@:
		38	cmp ebx,GL_DIFFUSE
		39	jne @f
		40	add edi,offs_mate_diffuse
		41	rep movsd
		42	jmp .end_f
		43	@@:
		44	cmp ebx,GL_SPECULAR
		45	jne @f
		46	add edi,offs_mate_specular
		47	rep movsd
		48	jmp .end_f
		49	@@:
		50	cmp ebx,GL_SHININESS
		51	jne @f
		52	fld dword[esi]
		53	add edi,offs_mate_shininess
		54	movsd
		55	mov dword[edi],SPECULAR_BUFFER_RESOLUTION
		56	fdiv dword[an180f]
		57	fimul dword[edi]
		58	fistp dword[edi] ;m.shininess_i = (v[0]/128.0f)*SPECULAR_BUFFER_RESOLUTION
		59	jmp .end_f
		60	@@:
		61	cmp ebx,GL_AMBIENT_AND_DIFFUSE
		62	jne @f
		63	add edi,offs_mate_ambient
		64	rep movsd
		65	sub esi,16
		66	;edi = &offs_mate_diffuse
		67	mov ecx,4
		68	rep movsd
		69	jmp .end_f
		70	@@: ;default
		71	; assert(0);
5153	IgorA	72	.end_f:
5256	IgorA	73	ret
5153	IgorA	74	endp
		75
		76
		77	proc glopColorMaterial uses eax ebx ecx, context:dword, p:dword
		78	mov eax,[context]
		79	mov ebx,[p]
		80	mov ecx,[ebx+4] ;ecx = p[1]
		81	mov dword[eax+offs_cont_current_color_material_mode],ecx
		82	mov ecx,[ebx+8] ;ecx = p[2]
		83	mov dword[eax+offs_cont_current_color_material_type],ecx
		84	ret
		85	endp
		86
		87
5218	IgorA	88	proc glopLight context:dword, p:dword
5256	IgorA	89	locals
		90	pos V4
		91	endl
		92	pushad
		93	mov eax,[context]
5218	IgorA	94	mov ebx,[p]
		95	mov edx,[ebx+4] ;edx = p[1]
		96
		97
		98
		99
		100	imul edx,sizeof.GLLight
		101	add edx,eax
		102	add edx,offs_cont_lights
		103
		104
		105	cmp ecx,GL_AMBIENT
		106	jne @f
		107	mov esi,ebx
		108	add esi,12
		109	mov edi,edx
		110	;add edi,offs_ligh_ambient ;offs_ligh_ambient = 0
		111	mov ecx,4
		112	rep movsd ;l.ambient=v
		113	jmp .end_f
		114	@@:
		115	cmp ecx,GL_DIFFUSE
		116	jne @f
		117	mov esi,ebx
		118	add esi,12
		119	mov edi,edx
		120	add edi,offs_ligh_diffuse
		121	mov ecx,4
		122	rep movsd ;l.diffuse=v
		123	jmp .end_f
		124	@@:
		125	cmp ecx,GL_SPECULAR
		126	jne @f
		127	mov esi,ebx
		128	add esi,12
		129	mov edi,edx
		130	add edi,offs_ligh_specular
		131	mov ecx,4
		132	rep movsd ;l.specular=v
		133	jmp .end_f
		134	@@:
		135	cmp ecx,GL_POSITION
		136	jne @f
		137	mov edi,ebx ;ebx = [ebp+12] = [p] = &p[0]
5256	IgorA	138	add edi,12 ;&p[3]
		139	mov esi,ebp
		140	sub esi,16 ;&pos
		141	stdcall gl_M4_MulV4, esi,dword[eax+offs_cont_matrix_stack_ptr],edi
		142	mov edi,edx
		143	add edi,offs_ligh_position
		144	mov ecx,4
		145	rep movsd ;l.position=pos
		146
		147
		148	ftst
		149	fstsw ax
		150	sahf
		151	jne .end_i
		152	;mov esi,ebp
		153	sub esi,16 ;&pos
		154	mov edi,edx
		155	add edi,offs_ligh_norm_position
		156	mov ecx,3
		157	rep movsd ;l.norm_position=pos[1,2,3]
		158
		159
		160	;add edi,offs_ligh_norm_position
		161	sub edi,12
		162	stdcall gl_V3_Norm,edi ;&l.norm_position
		163	.end_i:
		164	ffree st0
		165	fincstp
		166	jmp .end_f
5218	IgorA	167	@@:
		168	cmp ecx,GL_SPOT_DIRECTION
		169	jne @f
		170	mov esi,ebx ;&p[0]
5256	IgorA	171	add esi,12
5218	IgorA	172	mov edi,edx
		173	add edi,offs_ligh_spot_direction
		174	mov ecx,3
		175	rep movsd ;l.spot_direction=v[0,1,2]
		176	mov esi,ebx
		177	add esi,12
		178	mov edi,edx
		179	add edi,offs_ligh_norm_spot_direction
		180	mov ecx,3
		181	rep movsd ;l.norm_spot_direction=v[0,1,2]
		182	add edx,offs_ligh_norm_spot_direction
		183	stdcall gl_V3_Norm,edx
		184	jmp .end_f
		185	@@:
		186	cmp ecx,GL_SPOT_EXPONENT
		187	jne @f
		188	mov ecx,[ebx+12]
		189	mov [edi+offs_ligh_spot_exponent],ecx ;l.spot_exponent=p[3]
		190	jmp .end_f
		191	@@:
		192	cmp ecx,GL_SPOT_CUTOFF
		193	jne .end_spot_c
5256	IgorA	194	fld dword[ebp+12] ;float a=v.v[0]
		195	; assert(a == 180 \|\| (a>=0 && a<=90));
5153	IgorA	196	fst dword[edi+offs_ligh_spot_cutoff] ;l.spot_cutoff=a
5256	IgorA	197	fcom dword[an180f] ;if (a != 180)
		198	fstsw ax
		199	sahf
		200	jne @f
		201	fldpi
		202	fmulp
		203	fdiv dword[an180f]
		204	fcos
		205	fstp dword[edi+offs_ligh_spot_cutoff] ;l.cos_spot_cutoff=cos(a * M_PI / 180.0)
		206	jmp .end_f
		207	@@:
		208	ffree st0
		209	fincstp
		210	jmp .end_f
5218	IgorA	211	.end_spot_c:
5256	IgorA	212	cmp ecx,GL_CONSTANT_ATTENUATION
5218	IgorA	213	mov ecx,[ebx+12]
		214	mov [edi+offs_ligh_attenuation],ecx ;l->attenuation[0]=p[3]
		215	jmp .end_f
		216	@@:
		217	cmp ecx,GL_LINEAR_ATTENUATION
		218	mov ecx,[ebx+12]
		219	mov [edi+offs_ligh_attenuation+4],ecx ;l->attenuation[1]=p[3]
		220	jmp .end_f
		221	@@:
		222	cmp ecx,GL_QUADRATIC_ATTENUATION
		223	mov ecx,[ebx+12]
		224	mov [edi+offs_ligh_attenuation+8],ecx ;l->attenuation[2]=p[3]
		225	jmp .end_f
		226	@@: ;default:
		227	; assert(0);
5153	IgorA	228	.end_f:
5218	IgorA	229	popad
5256	IgorA	230	ret
5218	IgorA	231	endp
		232
		233
5153	IgorA	234
		235	proc glopLightModel uses ebx ecx esi edi, context:dword, p:dword
		236	mov edi,[context]
		237	mov ebx,[p]
		238	mov ebx,[ebx+4]
5256	IgorA	239	mov esi,[ebp+12] ;&p[0]
		240	add esi,8 ;&p[2]
		241
5153	IgorA	242
5256	IgorA	243	jne @f
5153	IgorA	244	mov ecx,4
		245	add edi,offs_cont_ambient_light_model
5256	IgorA	246	rep movsd ;for(i=0;i<4;i++) context.ambient_light_model.v[i]=v[i]
5153	IgorA	247	jmp .end_f
		248	@@:
		249	cmp ebx,GL_LIGHT_MODEL_LOCAL_VIEWER
5256	IgorA	250	jne @f
5153	IgorA	251	fld dword[esi] ;st0 = p[2]
5256	IgorA	252	fistp dword[edi+offs_cont_local_light_model]
5153	IgorA	253	jmp .end_f
		254	@@:
		255	cmp ebx,GL_LIGHT_MODEL_TWO_SIDE
5256	IgorA	256	jne @f
5153	IgorA	257	fld dword[esi] ;st0 = p[2]
5256	IgorA	258	fistp dword[edi+offs_cont_light_model_two_side]
5153	IgorA	259	jmp .end_f
		260	@@: ;default:
		261	; tgl_warning("glopLightModel: illegal pname: 0x%x\n", ebx);
5256	IgorA	262	; //assert(0);
5153	IgorA	263	.end_f:
		264	ret
		265	endp
		266
		267
5256	IgorA	268	{
		269	local .o_1
		270	local .o_2
		271	local .end_m
		272	fld dword a ;if (a<=0.0)
		273	ftst
		274	fstsw ax
		275	sahf
		276	ja .o_1
		277	ffree st0
		278	fincstp
		279	mov eax,0.0
		280	jmp .end_m ;return 0.0
		281	.o_1:
		282	fld1 ;else if (a>=1.0)
		283	fcompp
		284	fstsw ax
		285	sahf
		286	jb .o_2
		287	mov eax,1.0
		288	jmp .end_m ;return 1.0
		289	.o_2:
		290	mov eax,dword a ;else return a
		291	.end_m:
		292	}
		293
5153	IgorA	294
		295	proc gl_enable_disable_light uses eax ebx ecx, context:dword, light:dword, v:dword
		296	mov eax,[context]
		297	mov ebx,[light]
		298	imul ebx,sizeof.GLLight
		299	add ebx,eax
5256	IgorA	300	add ebx,offs_cont_lights
		301
5153	IgorA	302
		303	cmp dword[ebx+offs_ligh_enabled],0
		304	jne @f
		305	not ecx
		306	@@:
		307	and ecx,[v]
		308	or ecx,ecx
5256	IgorA	309	jz @f
		310	;if (v && !l.enabled)
5153	IgorA	311	mov dword[ebx+offs_ligh_enabled],1
		312	mov ecx,[eax+offs_cont_first_light]
		313	mov [ebx+offs_ligh_next],ecx
		314	mov [eax+offs_cont_first_light],ebx ;context.first_light = l
		315	mov dword[ebx+offs_ligh_prev],0 ;l.prev = NULL
		316	jmp .end_f
		317	@@:
		318	xor ecx,ecx
		319	cmp dword[v],0
		320	jne @f
		321	not ecx
		322	@@:
		323	and ecx,[ebx+offs_ligh_enabled]
		324	or ecx,ecx
5256	IgorA	325	jz .end_f
		326	;else if (!v && l.enabled)
5153	IgorA	327	mov dword[ebx+offs_ligh_enabled],0 ;l.enabled = 0
		328	mov ecx,[ebx+offs_ligh_next]
		329	cmp dword[ebx+offs_ligh_prev],0 ;if (l.prev == NULL)
		330	jne .els_0
		331	mov [eax+offs_cont_first_light],ecx ;context.first_light = l.next
		332	jmp @f
		333	.els_0:
		334	mov eax,[ebx+offs_ligh_prev]
		335	mov [eax+offs_ligh_next],ecx ;l.prev.next = l.next
		336	@@:
		337	cmp dword[ebx+offs_ligh_next],0
		338	je .end_f
		339	mov ecx,[ebx+offs_ligh_prev]
		340	mov eax,[ebx+offs_ligh_next]
		341	mov [eax+offs_ligh_prev],ecx ;l.next.prev = l.prev
		342	.end_f:
		343	ret
		344	endp
		345
		346
5256	IgorA	347	fl_1e_3 dd 1.0e-3
		348
		349
5153	IgorA	350	align 4
		351	proc gl_shade_vertex, context:dword, v:dword
		352	locals
5256	IgorA	353	R dd ? ;float
		354	G dd ? ;float
		355	B dd ? ;float
		356	A dd ? ;float
		357	s V3
		358	d V3
		359	dist dd ? ;float
		360	tmp dd ? ;float
		361	att dd ? ;float
		362	dot_spot dd ? ;float
		363	lR dd ? ;float
		364	lB dd ? ;float
		365	lG dd ? ;float
		366	twoside dd ? ;int
		367	idx dd ? ;int
		368	n V3 ;ebp-24
		369	vcoord V3 ;ebp-12
		370	endl
		371	pushad
		372	; ebx -> GLLight *l
		373	; ecx -> GLMaterial *m
		374	; esi -> GLVertex *v
		375	mov esi,[v]
		376	mov edx,[context]
		377	mov ecx,[edx+offs_cont_materials] ;ecx(m) = &context.materials[0]
		378	mov eax,[edx+offs_cont_light_model_two_side]
		379	mov [twoside],eax
		380
5153	IgorA	381
5256	IgorA	382	mov edi,ebp
		383	sub edi,24 ;edi = &n
		384	movsd ;n.X=v.normal.X
		385	movsd ;n.Y=v.normal.Y
		386	movsd ;n.Z=v.normal.Z
		387	mov esi,[v]
		388
5153	IgorA	389
5256	IgorA	390	fmul dword[ecx+offs_mate_ambient]
		391	fadd dword[ecx] ;offs_mate_emission=0
		392	fstp dword[R] ;R=m.emission.v[0]+m.ambient.v[0]*context.ambient_light_model.v[0]
		393	fld dword[edx+offs_cont_ambient_light_model+4]
		394	fmul dword[ecx+offs_mate_ambient+4]
		395	fadd dword[ecx+offs_mate_emission+4]
		396	fstp dword[G]
		397	fld dword[edx+offs_cont_ambient_light_model+8]
		398	fmul dword[ecx+offs_mate_ambient+8]
		399	fadd dword[ecx+offs_mate_emission+8]
		400	fstp dword[B]
		401	clampf [ecx+offs_mate_diffuse+12],0,1
		402	mov [A],eax ;A=clampf(m.diffuse.v[3],0,1)
		403
5153	IgorA	404
5256	IgorA	405	.cycle_0: ;for(l=context.first_light;l!=NULL;l=l.next)
		406	or ebx,ebx
		407	jz .cycle_0_end
		408
5153	IgorA	409
5256	IgorA	410	fld dword[ecx+offs_mate_ambient]
		411	fmul dword[ebx+offs_ligh_ambient]
		412	fstp dword[lR] ;lR=l.ambient.v[0] * m.ambient.v[0]
		413	fld dword[ecx+offs_mate_ambient+4]
		414	fmul dword[ebx+offs_ligh_ambient+4]
		415	fstp dword[lG] ;lG=l.ambient.v[1] * m.ambient.v[1]
		416	fld dword[ecx+offs_mate_ambient+8]
		417	fmul dword[ebx+offs_ligh_ambient+8]
		418	fstp dword[lB] ;lB=l.ambient.v[2] * m.ambient.v[2]
		419
5153	IgorA	420
5256	IgorA	421	jne .els_0
		422	; light at infinity
		423	mov eax,[ebx+offs_ligh_position]
		424	mov [d],eax ;d.X=l.position.v[0]
		425	mov eax,[ebx+offs_ligh_position+4]
		426	mov [d+4],eax ;d.Y=l.position.v[1]
		427	mov eax,[ebx+offs_ligh_position+8]
		428	mov [d+8],eax ;d.Z=l.position.v[2]
		429	mov dword[att],1.0
		430	jmp .els_0_end
		431	.els_0:
		432	; distance attenuation
		433	fld dword[ebx+offs_ligh_position]
		434	fsub dword[esi+offs_vert_ec]
		435	fstp dword[d] ;d.X=l.position.v[0]-v.ec.v[0]
		436	fld dword[ebx+offs_ligh_position+offs_Y]
		437	fsub dword[esi+offs_vert_ec+offs_Y]
		438	fstp dword[d+offs_Y] ;d.Y=l.position.v[1]-v.ec.v[1]
		439	fld dword[ebx+offs_ligh_position+offs_Z]
		440	fsub dword[esi+offs_vert_ec+offs_Z]
		441	fstp dword[d+offs_Z] ;d.Z=l.position.v[2]-v.ec.v[2]
		442	fld dword[d]
		443	fmul st0,st0
		444	fld dword[d+offs_Y]
		445	fmul st0,st0
		446	faddp
		447	fld dword[d+offs_Z]
		448	fmul st0,st0
		449	faddp
		450	fsqrt
		451	fst dword[dist] ;dist=sqrt(d.X^2+d^2+d^2)
		452	fcom dword[fl_1e_3]
		453	fstsw ax
		454	sahf
		455	jbe @f ;if (dist>1.0e-3)
		456	fld1
		457	fdiv st0,st1
		458	fld dword[d]
		459	fmul st0,st1
		460	fstp dword[d]
		461	fld dword[d+offs_Y]
		462	fmul st0,st1
		463	fstp dword[d+offs_Y]
		464	fld dword[d+offs_Z]
		465	fmul st0,st1
		466	fstp dword[d+offs_Z]
		467	ffree st0 ;1.0/dist
		468	fincstp
		469	@@:
		470	fld dword[ebx+offs_ligh_attenuation+8]
		471	fmul st0,st1 ;st0 = dist * l.attenuation[2]
		472	fadd dword[ebx+offs_ligh_attenuation+4]
		473	fmul st0,st1
		474	fadd dword[ebx+offs_ligh_attenuation]
		475	fld1
		476	fdiv st0,st1
		477	fstp dword[att] ;att = 1.0f/(l.attenuation[0]+dist(l.attenuation[1]+distl.attenuation[2]))
		478	ffree st0 ;1.0
		479	fincstp
		480	ffree st0 ;dist
		481	fincstp
		482	.els_0_end:
		483	fld dword[d]
		484	fmul dword[n]
		485	fld dword[d+offs_Y]
		486	fmul dword[n+offs_Y]
		487	faddp
		488	fld dword[d+offs_Z]
		489	fmul dword[n+offs_Z]
		490	faddp ;dot = d.Xn.X+d.Yn.Y+d.Z*n.Z
		491	cmp dword[twoside],0 ;if (twoside && dot < 0)
		492	je @f
		493	ftst ;if (dot<0)
		494	fstsw ax
		495	sahf
		496	jae @f
		497	fchs ;dot = -dot
		498	@@:
		499	ftst ;if (dot>0)
		500	fstsw ax
		501	sahf
		502	jle .if0_end
		503	; diffuse light
		504	fld dword[ecx+offs_mate_diffuse]
		505	fmul dword[ebx+offs_ligh_diffuse]
		506	fmul st0,st1
		507	fadd dword[lR]
		508	fstp dword[lR] ;lR+=dot * l.diffuse.v[0] * m.diffuse.v[0]
		509	fld dword[ecx+offs_mate_diffuse+4]
		510	fmul dword[ebx+offs_ligh_diffuse+4]
		511	fmul st0,st1
		512	fadd dword[lG]
		513	fstp dword[lG] ;lG+=dot * l.diffuse.v[1] * m.diffuse.v[1]
		514	fld dword[ecx+offs_mate_diffuse+8]
		515	fmul dword[ebx+offs_ligh_diffuse+8]
		516	fmul st0,st1
		517	fadd dword[lB]
		518	fstp dword[lB] ;lB+=dot * l.diffuse.v[2] * m.diffuse.v[2]
		519	ffree st0 ;dot
		520	fincstp
		521
5153	IgorA	522
5256	IgorA	523	fld dword[ebx+offs_ligh_spot_cutoff]
		524	fcomp dword[an180f] ;if (l.spot_cutoff != 180)
		525	fstsw ax
		526	sahf
		527	jne .if1_end
		528	fld dword[ebx+offs_ligh_norm_spot_direction]
		529	fmul dword[d]
		530	fld dword[ebx+offs_ligh_norm_spot_direction+4]
		531	fmul dword[d+offs_Y]
		532	faddp
		533	fld dword[ebx+offs_ligh_norm_spot_direction+8]
		534	fmul dword[d+offs_Z]
		535	faddp
		536	fchs
		537	fst dword[dot_spot]
		538	cmp dword[twoside],0 ;if (twoside && dot_spot < 0)
		539	je @f
		540	ftst ;if (dot_spot<0)
		541	fstsw ax
		542	sahf
		543	jae @f
		544	fchs ;dot_spot = -dot_spot
		545	@@:
		546	fcom dword[ebx+offs_ligh_cos_spot_cutoff] ;if (dot_spot < l.cos_spot_cutoff)
		547	fstsw ax
		548	sahf
		549	jae .els_1
		550	; no contribution
		551	ffree st0 ;dot_spot
		552	fincstp
		553	mov ebx,[ebx+offs_ligh_next]
		554	jmp .cycle_0 ;continue
		555	.els_1:
		556	; TODO: optimize
		557	fld dword[ebx+offs_ligh_spot_exponent]
		558	ftst ;if (l.spot_exponent > 0)
		559	fstsw ax
		560	sahf
		561	jbe @f
		562	fxch st1 ;dot_spot <--> l.spot_exponent
		563	;Вычисляем x^y
		564	;fld y
		565	;fld x
		566	fyl2x ;Стек FPU теперь содержит: st0=z=y*log2(x):
		567	;Теперь считаем 2**z:
		568	fld st0 ;Создаем еще одну копию z
		569	frndint ;Округляем
		570	fsubr st0,st1 ;st1=z, st0=z-trunc(z)
		571	f2xm1 ;st1=z, st0=2**(z-trunc(z))-1
		572	fld1
		573	faddp ;st1=z, st0=2**(z-trunc(z))
		574	fscale ;st1=z, st0=(2*trunc(z))(2(z-trunc(z)))=2t
		575	fxch st1
		576	fstp st ;Результат остается на вершине стека st0
		577	fmul dword[att]
		578	fstp dword[att] ;att=att*pow(dot_spot,l.spot_exponent)
		579	jmp .if1_end
		580	@@:
		581	ffree st0 ;l.spot_exponent
		582	fincstp
		583	ffree st0 ;dot_spot
		584	fincstp
		585	.if1_end:
		586
5153	IgorA	587
5256	IgorA	588	cmp dword[edx+offs_cont_local_light_model],0 ;if (c.local_light_model)
		589	je .els_2
		590	mov eax,[esi+offs_vert_ec]
		591	mov [vcoord],eax ;vcoord.X=v.ec.X
		592	mov eax,[esi+offs_vert_ec+offs_Y]
		593	mov [vcoord+offs_Y],eax ;vcoord.Y=v.ec.Y
		594	mov eax,[esi+offs_vert_ec+offs_Z]
		595	mov [vcoord+offs_Z],eax ;vcoord.Z=v.ec.Z
		596	mov eax,ebp
		597	sub eax,12 ;eax = &vcoord
		598	stdcall gl_V3_Norm, eax
		599	fld dword[d]
		600	fsub dword[vcoord]
		601	fstp dword[s] ;s.X=d.X-vcoord.X
		602	fld dword[d+offs_Y]
		603	fsub dword[vcoord+offs_Y]
		604	fstp dword[s+offs_Y] ;s.Y=d.Y-vcoord.Y
		605	fld dword[d+offs_Z]
		606	fsub dword[vcoord+offs_Z]
		607	fstp dword[s+offs_Z] ;s.Z=d.Z-vcoord.Z
		608	jmp .els_2_end
		609	.els_2:
		610	mov eax,[d]
		611	mov [s],eax ;s.X=d.X
		612	mov eax,[d+offs_Y]
		613	mov [s+offs_Y],eax ;s.Y=d.Y
		614	fld1
		615	fadd dword[d+offs_Z]
		616	fstp dword[s+offs_Z] ;s.Z=d.Z+1.0
		617	.els_2_end:
		618	fld dword[n]
		619	fmul st0,st0
		620	fld dword[n+offs_Y]
		621	fmul st0,st0
		622	faddp
		623	fld dword[n+offs_Z]
		624	fmul st0,st0
		625	faddp ;dot_spec = n.X^2 +n.Y^2 +n.Z^2
		626	cmp dword[twoside],0 ;if (twoside && dot_spec < 0)
		627	je @f
		628	ftst ;if (dot_spec < 0)
		629	fstsw ax
		630	sahf
		631	jae @f
		632	fchs ;dot_spec = -dot_spec
		633	@@:
		634	ftst ;if (dot_spec > 0)
		635	fstsw ax
		636	sahf
		637	jae .if0_end
		638	fld dword[s]
		639	fmul st0,st0
		640	fld dword[s+offs_Y]
		641	fmul st0,st0
		642	faddp
		643	fld dword[s+offs_Z]
		644	fmul st0,st0
		645	faddp
		646	fsqrt
		647	fcom dword[fl_1e_3]
		648	fstsw ax
		649	sahf
		650	jbe @f ;if (tmp > 1.0e-3)
		651	fdiv st1,st0 ;dot_spec /= tmp
		652	@@:
		653	ffree st0 ;tmp
		654	fincstp
		655
5153	IgorA	656
5256	IgorA	657	; testing specular buffer code
		658	; dot_spec= pow(dot_spec,m.shininess)
		659	stdcall specbuf_get_buffer, edx, dword[ecx+offs_mate_shininess_i], dword[ecx+offs_mate_shininess]
		660	;eax = specbuf
		661	mov dword[idx],SPECULAR_BUFFER_SIZE
		662	fild dword[idx]
		663	fld1
		664	fcomp
		665	fstsw ax
		666	sahf
		667	jae @f
		668	fmul st0,st1
		669	@@:
		670	fistp dword[idx] ;if (dot_spec < 1.0) idx = (int)(dot_spec*SPECULAR_BUFFER_SIZE)
		671	;else idx = SPECULAR_BUFFER_SIZE;
		672	ffree st0 ;dot_spec
		673	fincstp
		674	shl dword[idx],2
		675	add eax,dword[idx]
		676	fld dword[eax+offs_spec_buf] ;dot_spec = specbuf.buf[idx]
		677	fld dword[ebx+offs_ligh_specular]
		678	fmul st0,st1
		679	fmul dword[ecx+offs_mate_specular]
		680	fadd dword[lR]
		681	fstp dword[lR] ;lR+=dot_spec * l.specular.v[0] * m.specular.v[0]
		682	fld dword[ebx+offs_ligh_specular+offs_Y]
		683	fmul st0,st1
		684	fmul dword[ecx+offs_mate_specular+offs_Y]
		685	fadd dword[lG]
		686	fstp dword[lG] ;lG+=dot_spec * l.specular.v[1] * m.specular.v[1]
		687	fld dword[ebx+offs_ligh_specular+offs_Z]
		688	fmul st0,st1
		689	fmul dword[ecx+offs_mate_specular+offs_Z]
		690	fadd dword[lB]
		691	fstp dword[lB] ;lB+=dot_spec * l.specular.v[2] * m.specular.v[2]
		692	ffree st0 ;dot_spec
		693	fincstp
		694	jmp .if2_end
		695	.if0_end:
		696	ffree st0 ;dot [or] dot_spec
		697	fincstp
		698	.if2_end:
		699
5153	IgorA	700
5256	IgorA	701	fld dword[lR]
		702	fmul st0,st1
		703	fadd dword[R]
		704	fstp dword[R] ;R += att * lR
		705	fld dword[lG]
		706	fmul st0,st1
		707	fadd dword[G]
		708	fstp dword[G] ;G += att * lG
		709	fld dword[lB]
		710	fmul st0,st1
		711	fadd dword[B]
		712	fstp dword[B] ;B += att * lB
		713	ffree st0 ;att
		714	fincstp
		715	mov ebx,[ebx+offs_ligh_next]
		716	jmp .cycle_0
		717	.cycle_0_end:
		718
5153	IgorA	719
5256	IgorA	720	mov [esi+offs_vert_color],eax ;v.color.v[0]=clampf(R,0,1)
		721	clampf [G],0,1
		722	mov [esi+offs_vert_color+4],eax ;v.color.v[1]=clampf(G,0,1)
		723	clampf [B],0,1
		724	mov [esi+offs_vert_color+8],eax ;v.color.v[2]=clampf(B,0,1)
		725	mov eax,[A]
		726	mov [esi+offs_vert_color+12],eax ;v.color.v[3]=A
		727	popad
		728	ret
5153	IgorA	729	endp
		730	>
		731

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(root)/programs/develop/libraries/TinyGL/asm_fork/light.asm – Rev 5256