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RayTraceEffects.fx @ 3255

Revision 3255, 32.5 KB checked in by szirmay, 15 years ago (diff)

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1	#define SHADOWMAP_SIZE 512.0f // The size of ShadowMap
2
3	// Offsets in the ShadowMap
4	#define HALF 0.5f / SHADOWMAP_SIZE
5	#define ONE 1.0f / SHADOWMAP_SIZE
6	#define TWO 2.0f / SHADOWMAP_SIZE
7	#define THREE 3.0f / SHADOWMAP_SIZE
8	#define FIVE 5.0f / SHADOWMAP_SIZE
9	#define TEN 10.0f / SHADOWMAP_SIZE
10
11	#define AMB float4(0.5,0.5,0.5,1) // Power of the ambient light
12	#define FI 1000 // Summarized power of the light source
13
14	//----------------------------------------------
15	// GLOBAL VARIABLES
16	//---------------------------------------------
17	float3 g_vCameraPos3f; // Camera position
18	float3 g_vLightPos3f; // Light source position
19	int g_iNumberOfIteration; // Number of iteration
20	int g_iObjectID; // ID of the current object
21	int g_iPhotonMapSize; // PhotonMap size
22	float g_fFresnelFactor; // Fresnel factor
23	float g_fPower; // Power of light source
24	float g_fRefractionIndex; // Refraction index
25	float g_fShadowIntensity; // Shadow intensity
26	float g_fCausticsIntensity; // The intensity of a caustics snippet
27	bool g_bShadowON; // Shadow is used?
28	bool g_bShowHelp; // Darken the scene if help is on
29
30	float4x4 g_mWorldView; // WorldView transformation matrix
31	float4x4 g_mWorldViewProjection; // WorldViewProjection transformation matrix
32	float4x4 g_mWorldCenterObject; // World transformation matrix of CenterObject
33	float4x4 g_mLightViewTexBias; // Light space transformation matrix
34
35	texture g_txRoomMap; // Contains the original texture of the Room
36	texture g_txRoomCubeMapColorDistanceMap; // Contains the color and distance information in a CubeMap
37	texture g_txRoomCubeMapUVMap; // Contains the UV and ID of the object in a CubeMap
38	texture g_txPhotonUVMap; // Contains the photon hits UV and ID information
39	texture g_txPowerOfSnippetMap; // Contains the Gaussian filter
40	texture g_txRoomModifyMap; // Contains the texture of the Room with shadow and Caustics effect and black edges
41	texture g_txRoomLastMap; // Contains the texture of the Room
42
43	// Contain the textures of the Columns with shadow and Caustics effect
44	texture g_txColumnModifyTexture0, g_txColumnLastTexture0;
45	texture g_txColumnModifyTexture1, g_txColumnLastTexture1;
46	texture g_txColumnModifyTexture2, g_txColumnLastTexture2;
47	texture g_txColumnModifyTexture3, g_txColumnLastTexture3;
48
49	texture g_txColumnOriginalTexture; // Contains the original texture of a Column
50	texture g_txShadowMap; // Contains the shadowMap
51
52
53	//-----------------------------------------------------------------------------
54	// SAMPLERS
55	// Each texture must have its own sampler
56	//-----------------------------------------------------------------------------
57
58	//-----------------------------------------------------------------------------
59	// macro definition for filtered samplers
60	//-----------------------------------------------------------------------------
61
62	#define SAMPLER_LINEAR(g_samplerMap, g_txMap); \
63	sampler2D g_samplerMap = sampler_state { \
64	Texture = <g_txMap>; \
65	MinFilter = Linear; \
66	MagFilter = Linear; \
67	MipFilter = Linear; \
68	AddressU = BORDER; \
69	AddressV = BORDER; \
70	};
71
72	SAMPLER_LINEAR(g_samplerRoomMap, g_txRoomMap);
73	SAMPLER_LINEAR(g_samplerRoomLastMap, g_txRoomLastMap);
74	SAMPLER_LINEAR(g_samplerPhotonUVMap, g_txPhotonUVMap);
75	SAMPLER_LINEAR(g_samplerPowerOfSnippetMap, g_txPowerOfSnippetMap);
76	SAMPLER_LINEAR(g_samplerColumnLast0Map, g_txColumnLastTexture0);
77	SAMPLER_LINEAR(g_samplerColumnLast1Map, g_txColumnLastTexture1);
78	SAMPLER_LINEAR(g_samplerColumnLast2Map, g_txColumnLastTexture2);
79	SAMPLER_LINEAR(g_samplerColumnLast3Map, g_txColumnLastTexture3);
80	SAMPLER_LINEAR(g_samplerColumnOriginalMap, g_txColumnOriginalTexture);
81
82	//-----------------------------------------------------------------------------
83	// macro definition for non-filtered samplers
84	//-----------------------------------------------------------------------------
85
86	#define SAMPLER_POINT(g_samplerMap, g_txMap); \
87	sampler2D g_samplerMap = sampler_state { \
88	Texture = <g_txMap>; \
89	MinFilter = Point; \
90	MagFilter = Point; \
91	MipFilter = Point; \
92	AddressU = BORDER; \
93	AddressV = BORDER; \
94	};
95
96	SAMPLER_POINT(g_samplerRoomModifyMap, g_txRoomModifyMap); // must be point, it will be used for filtering
97	SAMPLER_POINT(g_samplerColumnModify0Map, g_txColumnModifyTexture0);
98	SAMPLER_POINT(g_samplerColumnModify1Map, g_txColumnModifyTexture1);
99	SAMPLER_POINT(g_samplerColumnModify2Map, g_txColumnModifyTexture2);
100	SAMPLER_POINT(g_samplerColumnModify3Map, g_txColumnModifyTexture3);
101
102	sampler2D g_samplerShadowMap = sampler_state
103	{
104	Texture = <g_txShadowMap>;
105	MinFilter = Linear;
106	MagFilter = Linear;
107	MipFilter = Linear;
108	AddressU = CLAMP;
109	AddressV = CLAMP;
110	};
111
112	samplerCUBE g_samplerRoomCubeMapColorDistanceMap = sampler_state
113	{
114	Texture = <g_txRoomCubeMapColorDistanceMap>;
115	MinFilter = Linear;
116	MagFilter = Linear;
117	MipFilter = Linear;
118	AddressU = BORDER;
119	AddressV = BORDER;
120	};
121
122	samplerCUBE g_samplerRoomCubeMapUVMap = sampler_state
123	{
124	Texture = <g_txRoomCubeMapUVMap>;
125	MinFilter = Linear;
126	MagFilter = Linear;
127	MipFilter = Linear;
128	AddressU = BORDER;
129	AddressV = BORDER;
130	};
131
132	samplerCUBE g_samplerRoomCubeMapUVMap_NO_FILTER = sampler_state
133	{
134	Texture = <g_txRoomCubeMapUVMap>;
135	MinFilter = Point;
136	MagFilter = Point;
137	MipFilter = Point;
138	AddressU = BORDER;
139	AddressV = BORDER;
140	};
141
142	//-----------------------------------------------------------------------------
143	// FUNCTIONS
144	//-----------------------------------------------------------------------------
145
146	// This function is called several times.
147	float3 Hit( float3 x, float3 R, samplerCUBE mp )
148	{
149	float rl = texCUBE( mp, R ).a; // \|r\|
150	float ppp = length( x ) / texCUBE( mp, x ).a; // \|p\|/\|p\|
151	float dun = 0, pun = ppp, dov = 0, pov;
152	float dl = rl * ( 1 - ppp ); // eq. 2
153	float3 l = x + R * dl; // ray equation
154
155	// iteration
156	for( int i = 0; i < g_iNumberOfIteration; i++ )
157	{
158	float llp = length( l ) / texCUBE( mp,l ).a; // \|l\|/\|l\|
159	if ( llp < 0.999f ) // undershooting
160	{
161	dun = dl; pun = llp; // last undershooting
162	dl += ( dov == 0 ) ? rl * ( 1 - llp ) : // eq. 2
163	( dl - dov ) * ( 1 - llp ) / ( llp - pov ); // eq. 3
164	} else if ( llp > 1.001f ) // overshooting
165	{
166	dov = dl; pov = llp; // last overshooting
167	dl += ( dl -dun ) * ( 1 - llp ) / ( llp - pun );// eq. 3
168	}
169	l = x + R * dl; // ray equation
170	}
171	return l; // computed hit point
172	}
173
174	//*****************************************************************************
175
176	// This function enlarges the usefull areas of the atlases.
177	float4 FlowLight( sampler2D mp, float2 Tex )
178	{
179	// Reads the current pixel
180	float4 preVal = tex2D( mp, Tex );
181	// If it is an unused pixel (.a=0)
182	if ( preVal.a == 0 )
183	{
184	float dist = ONE;
185	if( g_iObjectID != -1 ) dist *= 3.0f;
186
187	// Reads a neighbor
188	float2 modTex = Tex + float2( dist, 0.0 );
189	float4 candid = tex2D( mp, modTex );
190
191	// Calculate its intensity.
192	// If it is more intensive than the previous (original) one, it is stored.
193	if( dot( candid.xyz, candid.xyz ) > dot( preVal.xyz, preVal.xyz ) )
194	preVal = candid;
195
196	// Reads another neighbor
197	modTex += float2( -dist, dist );
198	candid = tex2D( mp, modTex );
199
200	// Calculate its intensity.
201	// If it is more intensive than the previous one, it is stored.
202	if( dot( candid.xyz, candid.xyz ) > dot( preVal.xyz, preVal.xyz ) )
203	preVal = candid;
204
205	// Reads another neighbor. If it is more intensive than the previous, it is stored.
206	modTex += float2( -dist, -dist );
207	candid = tex2D( mp, modTex );
208	if( dot( candid.xyz, candid.xyz ) > dot( preVal.xyz, preVal.xyz ) )
209	preVal = candid;
210
211	// Reads another neighbor. If it is more intensive than the previous, it is stored.
212	modTex += float2( dist, -dist );
213	candid = tex2D( mp, modTex );
214	if( dot( candid.xyz, candid.xyz ) > dot( preVal.xyz, preVal.xyz ) )
215	preVal = candid;
216	}
217	return preVal;
218	}
219
220
221	//-----------------------------------------------------------------------------
222	// SHADERS
223	// Here are the different shaders.
224	//-----------------------------------------------------------------------------
225
226
227	//*****************************************************************************
228	//-----------------------------------------------------------------------------
229	// RenderRoomColorDistance
230	// This shader stores the viewable object's color and its distance from the CenterObject's position.
231	// The result is stored in a CubeMap.
232	//-----------------------------------------------------------------------------
233	void RenderRoomColorDistanceVS(
234	float4 Pos : POSITION,
235	float2 Tex : TEXCOORD0,
236	out float4 outhPos : POSITION,
237	out float2 outTex : TEXCOORD0,
238	out float4 outPos : TEXCOORD1 )
239	{
240	outhPos = mul( Pos, g_mWorldViewProjection );
241	outTex = Tex;
242	// Calculates the world position
243	outPos = mul( Pos, g_mWorldView );
244	}
245	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
246
247	float4 RenderRoomColorDistancePS(
248	float2 Tex : TEXCOORD0,
249	float4 Pos : TEXCOORD1 ) : COLOR
250	{
251	// The color of the viewable object in the current pixel.
252	// In the scene there are 2 different textured object. (the room, and the Columns)
253	// Every column has the same brdf texture.
254	float3 retColor = float4(0,0,0,0);
255	if ( g_iObjectID == -1 ) retColor = float4( tex2D( g_samplerRoomMap, Tex ).xyz, 1);
256	else retColor = float4( tex2D( g_samplerColumnOriginalMap, Tex ).xyz, 1);
257
258	// The distance from the Center object
259	float Distance = (float) ( length( Pos.xyz ) );
260	return float4( retColor, Distance ); // Color(x,y,z) + Distance(w)
261	}
262	//*****************************************************************************
263
264
265	//-----------------------------------------------------------------------------
266	// RenderRoomUV
267	// This shader stores the viewable object's UV and unique ObjectID.
268	// The ObjectID identify the object, because the UV pair is not enough.
269	// The result is stored in a CubeMap.
270	//-----------------------------------------------------------------------------
271	void RenderRoomUVVS(
272	float4 Pos : POSITION,
273	float2 Tex : TEXCOORD0,
274	out float4 outhPos : POSITION,
275	out float2 outTex : TEXCOORD0 )
276	{
277	outhPos = mul( Pos, g_mWorldViewProjection );
278	outTex = Tex;
279	}
280	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
281
282	float4 RenderRoomUVPS(
283	float2 Tex : TEXCOORD0) : COLOR
284	{ // The UV value and the ID of the viewable object in the current pixel
285	// Here the "1" value is unnecessary
286	return float4( Tex, g_iObjectID, 1 ); // Tex(x,y) + g_iObjectID(z) + "1"(w)
287	}
288	//*****************************************************************************
289
290
291	//-----------------------------------------------------------------------------
292	// RenderUmbra
293	// This shader copies the brdf color from the original texture Atlas of the Object to the
294	// actual texture Atlas of the Object.
295	// It is needed, because the brdf value is modified with shadow.
296	// If the pixel is in shadow, the brdf value is decreased.
297	// The distance from the light source is also a modifying factor.
298	// The result is stored in a 2D map (Atlas).
299	//-----------------------------------------------------------------------------
300	void RenderUmbraVS(
301	float4 Pos : POSITION,
302	float2 Tex : TEXCOORD0,
303	float3 Normal : NORMAL,
304	out float4 outhPos : POSITION,
305	out float2 outTex : TEXCOORD0,
306	out float3 outPos : TEXCOORD1,
307	out float outCosT : TEXCOORD2,
308	out float4 outLPos : TEXCOORD3)
309	{
310	// The Room has no offset.
311	// The Columns have offset from the world's center position.
312	float4 PosWorld = Pos;
313	if ( g_iObjectID > -0.1f ) PosWorld = mul( Pos, g_mWorldView );
314	// Light vector
315	float3 L = normalize( g_vLightPos3f - PosWorld.xyz );
316
317	// Transformation between texture and screen space.
318	// HALF is an offset between the two space.
319	outhPos.x = Tex.x * 2.0f - 1.0f - HALF;
320	outhPos.y = 1.0f - Tex.y * 2.0f + HALF;
321	outhPos.z = 0;
322	outhPos.w = 1;
323
324	outTex = Tex;
325	outPos = PosWorld.xyz;
326	// The direction of the normal of the Room and the Columns are different.
327	if (g_iObjectID < -0.5f)
328	Normal = -Normal;
329	outCosT = dot( Normal, L );
330	outLPos = mul( PosWorld, g_mLightViewTexBias );
331	}
332	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
333
334	float4 RenderUmbraPS(
335	float2 Tex : TEXCOORD0,
336	float3 Pos : TEXCOORD1,
337	float CosT : TEXCOORD2,
338	float4 LPos : TEXCOORD3 ) : COLOR
339	{
340	// return Color
341	float4 retColor = float4(0,0,0,0);
342	// ShadowMap distance values
343
344	// Read the brdf from the atlas of the object
345	// The Room and the Columns have 2 different brdf Atlas.
346	if ( g_iObjectID == -1 )
347	retColor = float4( tex2D( g_samplerRoomMap, Tex ).xyz, 1);
348	else
349	retColor = float4( tex2D( g_samplerColumnOriginalMap, Tex ).xyz, 1);
350
351	// Use shadow?
352	if (g_bShadowON)
353	{
354	float visibility = 0;
355
356	for (float y = -1.5f; y < 2.0f; y += 1.0f){
357	for (float x = -1.5f; x < 2.0f; x += 1.0f) {
358	float4 coord = float4( LPos.xyz / LPos.w, 0 );
359	coord.xy += (float2(x,y)/(float)ONE);
360	if( LPos.z - tex2Dlod( g_samplerShadowMap, coord ).x < 0.2 )
361	{
362	visibility++;
363	}
364	}
365	}
366	visibility = visibility / 16.0f;
367	if( visibility < 16 )
368	{
369	visibility = visibility + ( 0.01f + 1 - g_fShadowIntensity );
370	}
371	if( visibility > 1.0f )
372	{
373	visibility = 1.0f;
374	}
375	retColor *= visibility;
376	}
377
378	// The intensity of the brdf depends on the position of the light source.
379
380	float3 L = g_vLightPos3f;
381	float pll2 = dot( ( Pos - L ), ( Pos - L ) );
382	retColor = AMB + ( FI / pll2 ) CosT * g_fCausticsIntensity;
383
384	if (g_bShowHelp) // light's effect is decreased to improve the visibility of help text
385	retColor *= 0.5f;
386
387	return retColor;
388	}
389	//*****************************************************************************
390
391
392	//-----------------------------------------------------------------------------
393	// RenderRoomAndColumnsScreen
394	// This shader render the scene's objects to the screen with their own atlas.
395	//-----------------------------------------------------------------------------
396	void RenderRoomAndColumnsScreenVS(
397
398	float4 Pos : POSITION,
399	float2 Tex : TEXCOORD0,
400	out float4 outhPos : POSITION,
401	out float2 outTex : TEXCOORD0 )
402	{
403	outhPos = mul( Pos, g_mWorldViewProjection );
404	outTex = Tex;
405	}
406	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
407
408	float4 RenderRoomAndColumnsScreenPS(
409	float2 Tex : TEXCOORD0) : COLOR
410	{
411	float4 retColor = float4(1,1,1,1);
412
413	// Five different atlas for the five object.
414	if (g_iObjectID == -1 ) retColor = float4( tex2D( g_samplerRoomLastMap, Tex ).xyz, 1 );
415	if (g_iObjectID == 0 ) retColor = float4( tex2D( g_samplerColumnLast0Map, Tex ).xyz, 1 );
416	if (g_iObjectID == 1 ) retColor = float4( tex2D( g_samplerColumnLast1Map, Tex ).xyz, 1 );
417	if (g_iObjectID == 2 ) retColor = float4( tex2D( g_samplerColumnLast2Map, Tex ).xyz, 1 );
418	if (g_iObjectID == 3 ) retColor = float4( tex2D( g_samplerColumnLast3Map, Tex ).xyz, 1 );
419
420	return retColor;
421	}
422	//*****************************************************************************
423
424
425	//-----------------------------------------------------------------------------
426	// RenderPhotonUVMap
427	// This shader creates the PhotonUVTexture with Hit function.
428	// It is a 2D map with the photon hits. It is created from the position of the light source.
429	// Every pixel stores the UV, and ObjectID information.
430	// The result is stored in a 2D map.
431	//-----------------------------------------------------------------------------
432	void RenderPhotonUVMapVS(
433	float4 Pos : POSITION,
434	float3 Normal : NORMAL,
435	float3 Tex : TEXCOORD0,
436	out float4 outhPos : POSITION,
437	out float3 outTex : TEXCOORD0,
438	out float3 outPos : TEXCOORD1,
439	out float3 outN : TEXCOORD2,
440	out float3 outL : TEXCOORD3)
441	{
442	// The offset (+float4...) is needed to move the Center Object into the center of the PhotonMap.
443	outhPos = mul( Pos, g_mWorldViewProjection ) + float4( -4.0f / (float)g_iPhotonMapSize , 4.0f / (float)g_iPhotonMapSize , 0, 0 );
444
445	outTex = Tex;
446	outPos = mul( Pos, g_mWorldCenterObject );
447	outN = Normal;
448	outL = normalize( outPos - g_vLightPos3f );
449	}
450	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
451
452	float4 RenderPhotonUVMapPS(
453	float3 Tex : TEXCOORD0,
454	float3 Pos : TEXCOORD1,
455	float3 N : TEXCOORD2,
456	float3 L : TEXCOORD3 ) : COLOR
457	{
458	// By default, there is no Hit.
459	float a = -1;
460	float4 hitSurf = float4(0,0,0,0);
461
462	if ( dot( L, N ) < -0.1 ){
463	L = normalize( L );
464	N = normalize( N );
465	float3 T = normalize( refract( L, N, g_fRefractionIndex ) );
466
467	// Look up from the CubeMap
468	// The return value is a vector. The CubeUVMap is read at that position.
469	float3 TT = Hit( Pos, T, g_samplerRoomCubeMapColorDistanceMap );
470	hitSurf = texCUBE( g_samplerRoomCubeMapUVMap, TT );
471	// There is a Hit.
472	a = 1;
473	}
474	return float4( hitSurf.xyz, a );
475	}
476	//*****************************************************************************
477
478
479	//-----------------------------------------------------------------------------
480	// RenderPhotonUVMapClassic
481	// This shader creates the PhotonUVTexture with classical method.
482	// It is a 2D map with the photon hits. It is created from the position of the light source.
483	// Every pixel stores the UV, and ObjectID information.
484	// The result is stored in a 2D map.
485	//-----------------------------------------------------------------------------
486	void RenderPhotonUVMapClassicVS(
487	float4 Pos : POSITION,
488	float3 Normal : NORMAL,
489	float3 Tex : TEXCOORD0,
490	out float4 outhPos : POSITION,
491	out float3 outTex : TEXCOORD0,
492	out float3 outPos : TEXCOORD1,
493	out float3 outN : TEXCOORD2,
494	out float3 outL : TEXCOORD3)
495	{
496	// The offset (+float4...) is needed to move the Center Object into the center of the PhotonMap.
497	outhPos = mul( Pos, g_mWorldViewProjection ) + float4( -4.0f / (float)g_iPhotonMapSize , 4.0f / (float)g_iPhotonMapSize , 0, 0 );
498
499	outTex = Tex;
500	outPos = mul( Pos, g_mWorldCenterObject );
501	outN = Normal;
502	outL = normalize( outPos - g_vLightPos3f );
503	}
504	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
505
506	float4 RenderPhotonUVMapClassicPS(
507	float3 Tex : TEXCOORD0,
508	float3 Pos : TEXCOORD1,
509	float3 N : TEXCOORD2,
510	float3 L : TEXCOORD3 ) : COLOR
511	{
512	// By default, there is no Hit.
513	float a = -1;
514	float4 hitSurf = float4(0,0,0,0);
515
516	if ( dot( L, N ) < -0.1 ){
517	L = normalize( L );
518	N = normalize( N );
519	float3 TT = normalize( refract( L, N, g_fRefractionIndex ) );
520
521	hitSurf = texCUBE( g_samplerRoomCubeMapUVMap, TT );
522	// There is a Hit.
523	a = 1;
524	}
525	return float4( hitSurf.xyz, a );
526	}
527	//*****************************************************************************
528
529
530
531	//-----------------------------------------------------------------------------
532	// RenderPhotonHit
533	// This shader uses the PhotonUVTexture as an input.
534	// It renders as many snippets to the Object's atlas as many pixels the PhotonUVTexture has.
535	// If a pixel in the PhotonUVTexture is not connected to the actual Object (not the same ObjectID),
536	// it will not be rendered.
537	// The result is blended into the Object's Atlas.
538	//-----------------------------------------------------------------------------
539	void RenderPhotonHitVS(
540	float4 Pos : POSITION,
541	float4 Color : COLOR0,
542	float2 Tex : TEXCOORD0,
543	out float4 outhPos : POSITION,
544	//out float2 outTex : TEXCOORD0,
545	out float2 outTexFilter : TEXCOORD1,
546	out float outPower : TEXCOORD2,
547	out float4 outPos : TEXCOORD3,
548	out float4 outColor : TEXCOORD4 )
549	{
550	// Reads back the PhotonHit's UV position and the ObjectID
551	float4 ph = tex2Dlod(g_samplerPhotonUVMap, float4( Tex, 0, 0));
552
553	// This enlarges the snippet's size if it is rendered into a Column's atlas.
554	// It is needed because the Column's atlas contains more elements,
555	// and the same distance (in world space) is bigger in the Column's atlas.
556	if ( g_iObjectID > -0.5 ) Pos *= 3.3f;
557
558	// Adds the snippet's offset to the UV coordinates
559	outPos.x = ph.x + Pos.x / 2.0;
560	outPos.y = ph.y - Pos.y / 2.0;
561	outPos.z = 0;
562	outPos.w = 1;
563
564	// Transforms the texture coordinates to screen coordinates
565	// and adds the snippet's offset to it
566	outhPos.x = ( ph.x * 2 ) - 1 + Pos.x + HALF;
567	outhPos.y = 1 - ph.y * 2 + Pos.y - HALF;
568
569	// Is it a real Hit?
570	// and are we render the right Object?
571	if ( ( ph.a > 0 ) && ( ph.b == g_iObjectID ) )
572	{
573	// If YES
574	outhPos.z = 0;
575	}
576	// If NO
577	else outhPos.z = -100;
578
579	outhPos.w = 1;
580
581	//outTex = outhPos;
582	outTexFilter = Tex;
583	outPower = ph.w;
584	outColor = Color;
585	}
586	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
587
588	float4 RenderPhotonHitPS(
589	//float2 Tex : TEXCOORD0,
590	float2 TexFilter : TEXCOORD1,
591	float Power : TEXCOORD2,
592	float4 Pos : TEXCOORD3,
593	float4 Color : TEXCOORD4 ) : COLOR
594	{
595	float4 retColor;
596	float4 brdf = float4(0,0,0,0);
597
598	// Room or Column?
599	if ( g_iObjectID == -1 ) brdf = tex2D( g_samplerRoomMap, Pos);
600	else brdf = tex2D( g_samplerColumnOriginalMap, Pos);
601
602	// The Gausian weight of a snippet.
603	float4 w = tex2D( g_samplerPowerOfSnippetMap, Color.yz );
604	// The color of the snippet's pixel.
605	retColor = g_fPower * brdf * w * g_fCausticsIntensity;
606	return float4( retColor.xyz, 0 );
607	}
608	//*****************************************************************************
609
610
611	//-----------------------------------------------------------------------------
612	// RenderRefractObjectScreen
613	// This shader calculates the color of the CenterObject with Hit function.
614	// It has reflection and refraction effect.
615	// The result is displayed on the screen.
616	//-----------------------------------------------------------------------------
617	void RenderRefractObjectScreenVS(
618	float4 Pos : POSITION,
619	float3 Normal : NORMAL,
620	float2 Tex : TEXCOORD0,
621	out float4 outhPos : POSITION,
622	out float3 outPos : TEXCOORD1,
623	out float3 outN : TEXCOORD2,
624	out float3 outV : TEXCOORD3 )
625	{
626	outhPos = mul( Pos, g_mWorldViewProjection );
627	outPos = mul( Pos, g_mWorldCenterObject );
628	outN = normalize( Normal );
629	outV = normalize( outPos - g_vCameraPos3f );
630	}
631	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
632
633	float4 RenderRefractObjectScreenPS(
634	float3 p0 : TEXCOORD1,
635	float3 N : TEXCOORD2,
636	float3 V : TEXCOORD3 ) : COLOR
637	{
638	V = normalize( V );
639	N = normalize( N );
640
641	// Calculates reflection
642	float3 R = reflect( V, N );
643	float3 RR = Hit(p0, R, g_samplerRoomCubeMapColorDistanceMap);
644
645	// Calculates refraction
646	float3 T = refract(V, N, g_fRefractionIndex);
647	float3 TT = Hit(p0, T, g_samplerRoomCubeMapColorDistanceMap);
648
649	// Calculates reflected color
650	float4 hitSurf = texCUBE( g_samplerRoomCubeMapUVMap_NO_FILTER, RR ); // UV position where the Atlas must be read
651	float4 reflectColor = float4( 1,0,0,0 );
652	if (hitSurf.b == -1) reflectColor = tex2D( g_samplerRoomLastMap, hitSurf.xy );
653	if (hitSurf.b == 0) reflectColor = tex2D( g_samplerColumnLast0Map, hitSurf.xy );
654	if (hitSurf.b == 1) reflectColor = tex2D( g_samplerColumnLast1Map, hitSurf.xy );
655	if (hitSurf.b == 2) reflectColor = tex2D( g_samplerColumnLast2Map, hitSurf.xy );
656	if (hitSurf.b == 3) reflectColor = tex2D( g_samplerColumnLast3Map, hitSurf.xy );
657
658
659	// Calculates refracted color
660	hitSurf = texCUBE( g_samplerRoomCubeMapUVMap_NO_FILTER, TT );
661	float4 refractColor = float4( 1,0,0,0 );
662	if (hitSurf.b == -1) refractColor = tex2D( g_samplerRoomLastMap, hitSurf.xy );
663	if (hitSurf.b == 0) refractColor = tex2D( g_samplerColumnLast0Map, hitSurf.xy );
664	if (hitSurf.b == 1) refractColor = tex2D( g_samplerColumnLast1Map, hitSurf.xy );
665	if (hitSurf.b == 2) refractColor = tex2D( g_samplerColumnLast2Map, hitSurf.xy );
666	if (hitSurf.b == 3) refractColor = tex2D( g_samplerColumnLast3Map, hitSurf.xy );
667
668	// Calculates return color modified by Fresnel function.
669	float F = g_fFresnelFactor + ( 1 - g_fFresnelFactor ) * pow( 1 - dot( N, -V ), 5 );
670	return float4( F * reflectColor + ( 1 - F ) * refractColor );
671	}
672
673	//*****************************************************************************
674
675
676	//-----------------------------------------------------------------------------
677	// RenderRefractObjectScreenClassic
678	// This shader calculates the color of the CenterObject with classical method.
679	// It has reflection and refraction effect.
680	// The result is displayed on the screen.
681	//-----------------------------------------------------------------------------
682	void RenderRefractObjectScreenClassicVS(
683	float4 Pos : POSITION,
684	float3 Normal : NORMAL,
685	float2 Tex : TEXCOORD0,
686	out float4 outhPos : POSITION,
687	out float3 outPos : TEXCOORD1,
688	out float3 outN : TEXCOORD2,
689	out float3 outV : TEXCOORD3 )
690	{
691	outhPos = mul( Pos, g_mWorldViewProjection );
692	outPos = mul( Pos, g_mWorldCenterObject );
693	outN = normalize( Normal );
694	outV = normalize( outPos - g_vCameraPos3f );
695	}
696	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
697
698	float4 RenderRefractObjectScreenClassicPS(
699	float3 p0 : TEXCOORD1,
700	float3 N : TEXCOORD2,
701	float3 V : TEXCOORD3 ) : COLOR
702	{
703	V = normalize( V );
704	N = normalize( N );
705
706	// Calculates reflection
707	float3 RR = reflect( V, N );
708
709	// Calculates refraction
710	float3 TT = refract(V, N, g_fRefractionIndex);
711
712
713	// Calculates reflected color
714	float4 hitSurf = texCUBE( g_samplerRoomCubeMapUVMap_NO_FILTER, RR ); // UV position where the Atlas must be read
715	float3 reflectColor = float4(0,0,0,0);
716	if (hitSurf.b == -1) reflectColor = tex2D( g_samplerRoomLastMap, hitSurf.xy );
717	if (hitSurf.b == 0) reflectColor = tex2D( g_samplerColumnLast0Map, hitSurf.xy );
718	if (hitSurf.b == 1) reflectColor = tex2D( g_samplerColumnLast1Map, hitSurf.xy );
719	if (hitSurf.b == 2) reflectColor = tex2D( g_samplerColumnLast2Map, hitSurf.xy );
720	if (hitSurf.b == 3) reflectColor = tex2D( g_samplerColumnLast3Map, hitSurf.xy );
721
722	// Calculates refracted color
723	hitSurf = texCUBE( g_samplerRoomCubeMapUVMap_NO_FILTER, TT );
724	float3 refractColor = float4(0,0,0,0);
725	if (hitSurf.b == -1) refractColor = tex2D( g_samplerRoomLastMap, hitSurf.xy );
726	if (hitSurf.b == 0) refractColor = tex2D( g_samplerColumnLast0Map, hitSurf.xy );
727	if (hitSurf.b == 1) refractColor = tex2D( g_samplerColumnLast1Map, hitSurf.xy );
728	if (hitSurf.b == 2) refractColor = tex2D( g_samplerColumnLast2Map, hitSurf.xy );
729	if (hitSurf.b == 3) refractColor = tex2D( g_samplerColumnLast3Map, hitSurf.xy );
730
731	// Calculates return color modified by Fresnel function.
732	float F = g_fFresnelFactor + ( 1 - g_fFresnelFactor ) * pow( 1 - dot( N, -V ), 5 );
733	return float4( F * reflectColor + ( 1 - F ) * refractColor, 1 );
734	}
735
736	//*****************************************************************************
737
738
739
740	//-----------------------------------------------------------------------------
741	// RenderLightScreen
742	// This shader renders the light source's object to the screen with a diffuse color.
743	//-----------------------------------------------------------------------------
744	void RenderLightScreenVS(
745	float4 Pos : POSITION,
746	out float4 outPos : POSITION )
747	{
748	outPos = mul( Pos, g_mWorldViewProjection );
749	}
750
751	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
752
753	float4 RenderLightScreenPS() : COLOR
754	{
755	return float4( 1, 1, 0.7f, 1 );
756	}
757	//*****************************************************************************
758
759
760	//-----------------------------------------------------------------------------
761	// RenderShadow
762	// This shader calculates the ShadowMapTexture's depth values.
763	// The result is stored in g_pShadowMapTexture.
764	//-----------------------------------------------------------------------------
765	void RenderShadowVS(
766	float4 Pos : POSITION,
767	out float4 outhPos : POSITION,
768	out float2 outPos : TEXCOORD1 )
769	{
770	outhPos = mul( Pos, g_mWorldViewProjection );
771	outPos = mul( Pos, g_mLightViewTexBias ).zw;
772	}
773	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
774
775	float4 RenderShadowPS(
776	float2 Pos : TEXCOORD1 ) : COLOR
777	{
778	return float4(Pos.x, 0, 0, 1);
779	}
780	//*****************************************************************************
781
782
783	//-----------------------------------------------------------------------------
784	// FullScreenQuad
785	// This shader modifies the atlases of Room and Columns.
786	// It removes the black edges from the atlases.
787	// The result is stored in the Object's atlas.
788	//-----------------------------------------------------------------------------
789	void FullScreenQuadVS(
790	float4 Pos : POSITION,
791	out float4 outhPos : POSITION,
792	out float2 outTex : TEXCOORD0 )
793	{
794	outhPos = float4( Pos.xy, 0, 1 );
795	outTex.x = Pos.x * 0.5f + 0.5f;
796	outTex.y = -Pos.y * 0.5f + 0.5f;
797	}
798	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
799
800	float4 FullScreenQuadPS(
801	float2 Tex : TEXCOORD0 ) : COLOR
802	{
803	float4 preVal = float4(1,1,1,1);
804
805	if( g_iObjectID ==-1 ) preVal = FlowLight( g_samplerRoomModifyMap, Tex );
806	if( g_iObjectID == 0 ) preVal = FlowLight( g_samplerColumnModify0Map, Tex );
807	if( g_iObjectID == 1 ) preVal = FlowLight( g_samplerColumnModify1Map, Tex );
808	if( g_iObjectID == 2 ) preVal = FlowLight( g_samplerColumnModify2Map, Tex );
809	if( g_iObjectID == 3 ) preVal = FlowLight( g_samplerColumnModify3Map, Tex );
810
811	return preVal;
812	}
813	//*****************************************************************************
814
815
816	//-----------------------------------------------------------------------------
817	// PhotonMapScreen
818	// This shader renders the PhotonMap texture (g_txPhotonUVMap) into the screen lower left corner.
819	// This texture contains the PhotonHits positions and ObjectIDs.
820	// The result is displayed on the screen.
821	//-----------------------------------------------------------------------------
822
823	void PhotonMapScreenVS(
824	float4 Pos : POSITION,
825	out float4 outhPos : POSITION,
826	out float2 outTex : TEXCOORD0 )
827	{
828	outhPos = float4( Pos.xy * 0.2f + float2( -0.7f, -0.7f ), 0, 1 );
829	outTex.x = Pos.x * 0.5f + 0.5f;
830	outTex.y = -Pos.y * 0.5f + 0.5f;
831	}
832	// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
833
834	float4 PhotonMapScreenPS(
835	float2 Tex : TEXCOORD0 ) : COLOR
836	{
837	return tex2D( g_samplerPhotonUVMap, Tex );
838	}
839	//*****************************************************************************
840
841
842
843
844
845	//-----------------------------------------------------------------------------
846	// TECHNIQUES
847	// Here are the different Techniques.
848	//-----------------------------------------------------------------------------
849
850	// Technique(AnyRenderPass):
851	// VertexShader = compile vs_3_0 AnyRenderPassVS()
852	// PixelShader = compile vs_3_0 AnyRenderPassPS()
853
854	// if using the name convention above to name vertex/pixel shaders,
855	// you can use the following macro definition to quickly define a technique:
856
857	// note: ## stands for concatenation
858
859	#define Technique(name); \
860	technique name \
861	{ \
862	pass p0 \
863	{ \
864	VertexShader = compile vs_3_0 name##VS(); \
865	PixelShader = compile ps_3_0 name##PS(); \
866	} \
867	}
868
869	Technique( RenderRoomColorDistance );
870	Technique( RenderRoomUV );
871	Technique( RenderUmbra );
872	Technique( RenderRoomAndColumnsScreen );
873	Technique( RenderLightScreen );
874	Technique( RenderPhotonUVMap );
875	Technique( RenderPhotonUVMapClassic );
876	Technique( RenderPhotonHit );
877	Technique( RenderRefractObjectScreen );
878	Technique( RenderRefractObjectScreenClassic );
879	Technique( RenderShadow );
880	Technique( FullScreenQuad );
881	Technique( PhotonMapScreen );

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