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Displacement mapping. Kezdeti teendők. Letöltés: OgreDisplacementMappingBase.zip Kicsomagol Futtat: OgreDisplacement.sln Include és library útvonalak beállítása Working directory beállítása Fordít Futtat. Próba. Material scheme. … OIS:: InputManager * OISInputManager ; - PowerPoint PPT Presentation
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Kezdeti teendőkLetöltés: OgreDisplacementMappingBase.zipKicsomagolFuttat: OgreDisplacement.slnInclude és library útvonalak beállításaWorking directory beállításaFordítFuttat
Próba
Material schemematerial Phong{
technique
{
scheme VeryLow
pass : PhongPass
…
…OIS::InputManager* OISInputManager;int schemecount = 1;int currentScheme = 0;String qualitySchemes[] = {
"VeryLow","Low","Medium","Height","VeryHeight","Ultra"
};…void setupScene(){ … renderWindow->setActive(true); renderWindow->getViewport(0)->setMaterialScheme(qualitySchemes[0]); …
Minden sémához új technika a phong.material-ba
Minden technikának új pixel shadert írunk(ha implementáltunk egy új sémát
schemecount ++)
if( mKeyboard->isKeyDown(OIS::KC_SPACE) && mTimeUntilNextToggle < 0){
currentScheme = (++currentScheme)%schemecount;renderWindow->getViewport(0)->setMaterialScheme(qualitySchemes[currentScheme]);mTimeUntilNextToggle = 0.2f;
}
Próba
normal mappingmaterial Phong
{
technique
{
scheme VeryLow
…
}
technique
{
scheme Low
pass
{
vertex_program_ref PhongShadingDisplacedVS
{
}
fragment_program_ref PhongShadingNormalMappedPS
{
}
}
}
}
Phong.programvertex_program PhongShadingVS hlsl{}fragment_program PhongShadingPS hlsl{}
vertex_program PhongShadingDisplacedVS hlsl{ source PhongDisplaced.hlsl entry_point displacedVS target vs_2_0}fragment_program PhongShadingNormalMappedPS hlsl{ source PhongDisplaced.hlsl entry_point normalMappedPS target ps_2_0}
PhongDisplaced.hlslstruct VERTEX_IN{
float4 position : POSITION;float4 normal : NORMAL;float2 texCoord : TEXCOORD0;float4 tangent : TANGENT;float4 binormal : BINORMAL;
};
struct VERTEX_OUT{
float4 hPos : POSITION;float3 N : TEXCOORD0;float3 L : TEXCOORD1;float3 V : TEXCOORD2;float2 texCoord : TEXCOORD3;float3 T : TEXCOORD4;float3 B : TEXCOORD5;
};
VERTEX_OUT displacedVS(VERTEX_IN In,uniform float4x4 worldViewProj,uniform float4x4 worldView,uniform float4x4 worldViewIT,uniform float4 lightPos)
{ VERTEX_OUT Out = (VERTEX_OUT) 0;
Out.hPos = mul(worldViewProj, In.position); Out.texCoord = In.texCoord; Out.V = -mul(worldView, In.position).xyz; Out.L = lightPos.xyz + lightPos.w * Out.V; Out.N = mul(worldViewIT, In.normal).xyz; Out.T = mul(worldViewIT, In.tangent).xyz; Out.B = mul(worldViewIT, In.binormal).xyz; return Out;}
sampler2D colorTex : register(s0);sampler2D normalMap : register(s1);float4 amientLightColor;float4 diffuseLightColor;float4 specularLightColor;float4 lightAttenuation;float4 ambientColor;float4 diffuseColor;float4 specularColor;float4 emissiveColor;float HEIGHT_SCALE = 0.1;float HEIGHT_BIAS = -0.08;float bumpScale = 1;float4 normalMappedPS(VERTEX_OUT In):COLOR0{
float3 N = normalize(In.N);float3 T = normalize(In.T);float3 B = normalize(In.B);
float3x3 TangentToView = float3x3(T, B, N);
float3 Nt = normalize(tex2D(normalMap, In.texCoord).xyz - float3(0.5, 0.5, 0.0));Nt.z /= bumpScale;Nt = normalize(Nt);N = mul(Nt, TangentToView);
//innentől ugyanaz, mint a sima phong shaderünk… következő dia
float2 dtdx = ddx(In.texCoord);float2 dtdy = ddy(In.texCoord);float3 dpdx = ddx(-In.V);float3 dpdy = ddy(-In.V);
float3 T = normalize(dpdx * dtdy.y - dpdy * dtdx.y);float3 B =normalize(dpdy * dtdx.x - dpdx * dtdy.x) ;float3 N = cross(T, B);N *= sign(-dot(N, -In.V));
…float d = length(In.L);float3 L = In.L / d;float3 V = normalize(In.V);
float4 texColor = tex2D(colorTex, In.texCoord);
float attenuation = 1.0 / (lightAttenuation.y + lightAttenuation.z * d + lightAttenuation.w * d * d);
float4 ambient = amientLightColor * ambientColor;float4 diffuse = max(0,dot(N,L)) * diffuseColor * diffuseLightColor * attenuation;float3 H = normalize(L + V);float4 specular = pow(max(0, dot(N,H)), specularColor.w)
* float4(specularColor.xyz, 1) * specularLightColor * attenuation;
return texColor * (ambient + diffuse) + specular + emissiveColor;}
Próba (int schemecount = 2;)
Parallax Mappingfloat4 parallaxMappedPS(VERTEX_OUT In):COLOR0{
…float3 Nt = normalize(tex2D(normalMap, In.texCoord).xyz - float3(0.5, 0.5, 0.0));
float d = length(In.L);float3 L = In.L / d;float3 V = normalize(In.V);
float3 Vt = mul(TangentToView, V); float h = tex2D(normalMap, In.texCoord).a * HEIGHT_SCALE + HEIGHT_BIAS;//In.texCoord += h * Vt.xy / Vt.z; //parallax //In.texCoord += h * Vt.xy; //parallax with offset limitIn.texCoord += h * Nt.z * Vt.xy; //parallax with slope
Nt = normalize(tex2D(normalMap, In.texCoord).xyz - float3(0.5, 0.5, 0.0));Nt.z /= bumpScale;Nt = normalize(Nt);N = mul(Nt, TangentToView);
float4 texColor = tex2D(colorTex, In.texCoord);float attenuation = …
Próba (int schemecount = 3;)
Iteratív parallax#define PARALLAX_ITERATION 5
float2 PARALLAX_MAPPING_ITER(float3 TexCoord, float3 View){ for(int i = 0; i < PARALLAX_ITERATION; i++) {
float3 N = tex2D(normalMap, TexCoord).xyz;
float h = tex2D(normalMap, TexCoord).a * HEIGHT_SCALE + HEIGHT_BIAS;
TexCoord += (h - TexCoord.z) * N.z * View;}return TexCoord.xy;
}
float4 iterativeParallaxMappedPS(VERTEX_OUT In):COLOR0{…
float3 Vt = mul(TangentToView, V); In.texCoord = PARALLAX_MAPPING_ITER(float3(In.texCoord, 0), Vt);
float4 texColor = tex2D(colorTex, In.texCoord);
Próba (int schemecount = 4;)
Relief mappingfloat4 reliefMappedPS(VERTEX_OUT In):COLOR0{
…
float3 Vt = mul(TangentToView, V); float3 sRange = -Vt * HEIGHT_SCALE / Vt.z * 0.5;float3 sPos = float3(In.texCoord, 0) - sRange;
for( int i=0; i<12; i++ ){
float bump = tex2D(normalMap, sPos.xy).a;sRange *= 0.5;if (sPos.z > bump * HEIGHT_SCALE) // If outside
sPos += sRange; // Move forwardelse
sPos -= sRange; // Move backward}In.texCoord = sPos.xy;
float4 texColor = tex2D(colorTex, In.texCoord);
Próba (int schemecount = 5;)
Relief mapping + árnyékokfloat4 reliefShadowMappedPS(VERTEX_OUT In):COLOR0
{
…
for( int i=0; i<12; i++ )
{
…
}
In.texCoord = sPos.xy;
float shadow = 1.0;
float h1 = sPos.z;
float h = tex2D(normalMap, In.texCoord).a;
float3 Lt = mul(TangentToView, L);
sRange = -Lt * HEIGHT_SCALE / Lt.z * 0.5;
sPos -= sRange * (1.0 - h - 0.5);
Folytatás…for( int i=0; i<10; i++ ){
float bump = tex2D(normalMap, sPos.xy).a;sRange *= 0.5;if (sPos.z > bump * HEIGHT_SCALE) // If outside
sPos += sRange; // Move forwardelse
sPos -= sRange; // Move backward}float h2 = sPos.z;if(h2 > h1 + 0.01) shadow = 0.3;
float4 texColor = tex2D(colorTex, In.texCoord);…
float attenuation = …attenuation *= shadow;
Próba (int schemecount = 6;)
![Implementac¸ao da t˜ ecnica de´ Displacement Mapping em ...dmt/DM.pdf · A tecnica de´ Displacement Mapping [Cook 1984], e uma t´ ecnica´ alternativa em contraste comtecnicas](https://img.pdfslide.tips/doc/110x75/600d71ef4ab88a271a2278a8/implementacao-da-toe-ecnica-de-displacement-mapping-em-dmtdmpdf-a-tecnica.jpg)
