PCF,VSM,LISPSM…

Kezdeti teendőkLetöltés: OgreLabShadowMappingBase.zipKicsomagol.sln futtatInclude, lib és working dir beállításaFordításFuttatás

Próba

OgreShadowMap.cpp

void setupScene(){…

sceneManager->setShadowTechnique(SHADOWTYPE_TEXTURE_MODULATIVE);sceneManager->setShadowFarDistance(1000);

…}

Próba

sceneManager->setShadowTechnique(SHADOWTYPE_TEXTURE_ADDITIVE_INTEGRATED);

material Phong{

technique{

pass{

vertex_program_ref {

… param_named_auto lightMatrix texture_worldviewproj_matrix 0}

…texture_unit normal{

texture unitNormal.jpgfiltering anisotropic

} texture_unit shadowmap{

content_type shadowtex_address_mode clampfiltering bilinear

} }

}}

Phong.hlslstruct VERTEX_OUT

{

float4 hPos : POSITION;

float3 N : TEXCOORD0;

float3 L : TEXCOORD1;

float3 V : TEXCOORD2;

float2 texCoord : TEXCOORD3;

float2 texCoord2 : TEXCOORD4;

float4 lPos :TEXCOORD5;

};

VERTEX_OUT vsStatic (VERTEX_IN In,

uniform float4x4 worldViewProj,

uniform float4x4 worldView,

uniform float4x4 worldViewIT,

uniform float4 lightPos,

uniform float4x4 lightMatrix)

{

…

Out.lPos = mul(lightMatrix, In.position);

vsDynamic-ra is!

float4 ps(VERTEX_OUT In,…uniform sampler2D shadowMap : register(s3),…):COLOR

{…

diffuseLightColor *= spot; specularLightColor *= spot;

float shadow = 1;if(In.lPos.z > 0){

In.lPos /= In.lPos.w;shadow = tex2D(shadowMap, In.lPos.xy);

}diffuseLightColor *= shadow; specularLightColor *= shadow;

float4 ambient = amientLightColor * ambientColor;…}

Próba

ShadowMap.materialmaterial ShadowMap{

technique{

pass{

vertex_program_ref ShadowMapVS { param_named_auto worldviewproj

worldviewproj_matrix} fragment_program_ref ShadowMapPS

{}

}}

}

ShadowMap.programvertex_program ShadowMapVS hlsl{ source ShadowMap.hlsl entry_point vs target vs_2_0}

fragment_program ShadowMapPS hlsl{ source ShadowMap.hlsl entry_point ps target ps_2_0}

ShadowMap.hlslvoid vs(float4 position : POSITION,

uniform float4x4 worldviewproj,uniform float4x4 worldview,out float4 hPos:POSITION,out float4 lPos:TEXCOORD0)

{hPos = mul(worldviewproj, position);lPos = mul(worldviewproj, position);

}

float4 ps(float4 hPos : POSITION, float4 lPos : TEXCOORD0):COLOR

{lPos /= lPos.w;return lPos.z;

}

Phong.hlsl#define BIAS 0.0007

float simpleShadow(float3 coord, sampler2D sm)

{

float zs = tex2D(sm,coord.xy).r;

return coord.z < zs + BIAS;

}

float4 ps …{

float shadow = 1;

if(In.lPos.z > 0)

{In.lPos /= In.lPos.w;

shadow = simpleShadow(In.lPos.xyz, shadowMap);

}

diffuseLightColor *= shadow; specularLightColor *= shadow;

}

OgreShadowMap.cppvoid setupScene(){…

level->setCastShadows(true);…

sceneManager->setShadowTechnique(SHADOWTYPE_TEXTURE_ADDITIVE_INTEGRATED);

sceneManager->setShadowFarDistance(1000);sceneManager->setShadowTextureCasterMaterial("ShadowMap");sceneManager->setShadowTextureConfig(0,500,500,PixelFormat::PF_FLOAT16_RGBA);sceneManager->setShadowCasterRenderBackFaces(false);sceneManager->setShadowTextureSelfShadow(true);

…}

Próba

…sceneManager-

>setShadowTechnique(SHADOWTYPE_TEXTURE_ADDITIVE_INTEGRATED);

FocusedShadowCameraSetup* camsetup = new FocusedShadowCameraSetup();ShadowCameraSetupPtr csp(camsetup);sceneManager->setShadowCameraSetup(csp);

vagy

LiSPSMShadowCameraSetup* camsetup = new LiSPSMShadowCameraSetup();camsetup->setCameraLightDirectionThreshold(Degree(20));camsetup->setUseSimpleOptimalAdjust(false);camsetup->setOptimalAdjustFactor(0.9);ShadowCameraSetupPtr csp(camsetup);sceneManager->setShadowCameraSetup(csp);

Próba

ShadowMap.materialmaterial ShadowMap{

technique{

pass{

vertex_program_ref ShadowMapVS {

param_named_auto worldviewproj worldviewproj_matrix

} fragment_program_ref ShadowMapPS

{param_named_auto depthRangeParams scene_depth_range

}}

}}

ShadowMap.hlslfloat4 ps(float4 hPos : POSITION,

float4 lPos : TEXCOORD0, uniform float4 depthRangeParams):COLOR

{float z = lPos.w / depthRangeParams.y;return z;

}

Phong.material

material Phong{

technique{

pass{

fragment_program_ref {

… param_named_auto lightDepthParams shadow_scene_depth_range 0

}…

}}

}

Phong.hlsl#define BIAS 0.01…float4 ps(… uniform float4 lightDepthParams):COLOR{…

float shadow = 1;if(In.lPos.z > 0){

float z = In.lPos.w / lightDepthParams.y;In.lPos /= In.lPos.w;shadow = simpleShadow (float3(In.lPos.xy,z), shadowMap);

}…}

Próba

Phong.hlsl#define BIAS 0.01

static const float2 RAND[] = {float2(-0.613392, 0.617481),float2(0.170019, -0.0402539),float2(-0.299417, 0.791925),float2(0.64568, 0.49321),float2(-0.651784, 0.717887),float2(0.421003, 0.0270699),float2(-0.817194, -0.271096),float2(-0.705374, -0.668203),float2(0.97705, -0.108615),float2(0.0633259, 0.142369),float2(0.203528, 0.214332),float2(-0.667531, 0.32609),float2(-0.0984222, -0.295755),float2(-0.885922, 0.215369),float2(0.566637, 0.605213),float2(0.0397656, -0.3961),float2(0.751945, 0.453352),

float2(0.0787072, -0.715323),float2(-0.0758385, -0.529344),float2(0.724479, -0.580798),float2(0.559313, 0.687307),float2(0.222999, -0.215125),float2(-0.467574, -0.405438),float2(-0.248268, -0.814753),float2(0.354411, -0.88757),float2(-0.448225, -0.454207),float2(0.175817, 0.382366),float2(0.675222, 0.452986),float2(-0.0301217, -0.589282),float2(0.487472, -0.0630817),float2(-0.0840785, 0.898312),float2(0.488876, -0.783441)};

Percentage Closer Filteringfloat PCFShadow(float3 coord, sampler2D sm){

float s = 0;float zs;static const float samplecount = 12;for(int i = 0; i < samplecount; i++){

zs = tex2D(sm,coord.xy + RAND[i] * 0.003).r;s += coord.z < zs + BIAS;

}s /= samplecount;return s;

}

float4 ps(…if(In.lPos.z > 0){

float z = In.lPos.w / lightDepthParams.y;In.lPos /= In.lPos.w;shadow = PCFShadow(float3(In.lPos.xy,z), shadowMap);

}

Próba

Variance Shadow Mapping#define EPSILON_VSM 0.001float VSMShadow(float3 coord, sampler2D sm){

float2 zs = tex2D(sm,coord.xy).xy;float M1 = zs.x;float M2 = zs.y;float lit_factor = coord.z < M1 + BIAS;

float v2 = min(max(M2 - M1 * M1, 0.0) + EPSILON_VSM, 1.0);float m_d = M1 - coord.z;

float pmax = v2 / (v2 + m_d * m_d);

return max(lit_factor, pmax); }

float4 ps(…if(In.lPos.z > 0){

float z = In.lPos.w / lightDepthParams.y;In.lPos /= In.lPos.w;shadow = VSMShadow(float3(In.lPos.xy,z), shadowMap);

}

ShadowMap.hlsl

float4 ps(float4 hPos : POSITION,float4 lPos:TEXCOORD0,uniform float4

depthRangeParams):COLOR{

float z = lPos.w / depthRangeParams.y;return float4(z,z*z,0,0);

}

Próba

VSM szűrésfloat VSMShadow(float3 coord, sampler2D sm){

float2 zs = tex2D(sm,coord.xy).xy;for(int i = 0; i < 4; i++){

zs += tex2D(sm,coord.xy + RAND[i] * 0.005).xy;}zs /= 5;

float M1 = zs.x;float M2 = zs.y;

Próba