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0032039: Visualization, TKOpenGl - implement simple shadow mapping for a direct light source

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Graphic3d_CLight::ToCastShadows() - added new property defining if light should cast shadows (ignored by Ray-Tracing).

OpenGl_ShaderManager::stdComputeLighting() now implements shadow mapping for directional lights.
OpenGl_ShaderManager::prepareGeomMainSrc() now handles copying of arrays.
OpenGl_Context::ShadowMapTexUnit() - added property defining an offset for shadow map texture units.
OpenGl_ShadowMap - added new class storing shadow map FBO with parameters.
OpenGl_View::prepareFrameBuffers() - added resizing of shadow map FBOs.
OpenGl_View::Redraw() - added section redrawing scene into shadow map FBOs via OpenGl_View::renderShadowMap() method.

vrenderparams - added new parameters -shadowMapResolution and -shadowMapBias.
This commit is contained in:
kgv
2021-01-04 12:17:44 +03:00
committed by bugmaster
parent 37f80e163c
commit d84e866973
33 changed files with 1025 additions and 47 deletions
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63
src/ViewerTest/ViewerTest_ViewerCommands.cxx
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@@ -10771,6 +10771,7 @@ static int VLight (Draw_Interpretor& theDi,
theDi << " Type: Directional\n";
theDi << " Intensity: " << aLight->Intensity() << "\n";
theDi << " Headlight: " << (aLight->Headlight() ? "TRUE" : "FALSE") << "\n";
theDi << " CastShadows:" << (aLight->ToCastShadows() ? "TRUE" : "FALSE") << "\n";
theDi << " Smoothness: " << aLight->Smoothness() << "\n";
aLight->Direction (anXYZ[0], anXYZ[1], anXYZ[2]);
theDi << " Direction: " << anXYZ[0] << ", " << anXYZ[1] << ", " << anXYZ[2] << "\n";
@@ -10781,6 +10782,7 @@ static int VLight (Draw_Interpretor& theDi,
theDi << " Type: Positional\n";
theDi << " Intensity: " << aLight->Intensity() << "\n";
theDi << " Headlight: " << (aLight->Headlight() ? "TRUE" : "FALSE") << "\n";
theDi << " CastShadows:" << (aLight->ToCastShadows() ? "TRUE" : "FALSE") << "\n";
theDi << " Smoothness: " << aLight->Smoothness() << "\n";
aLight->Position (anXYZ[0], anXYZ[1], anXYZ[2]);
theDi << " Position: " << anXYZ[0] << ", " << anXYZ[1] << ", " << anXYZ[2] << "\n";
@@ -10794,6 +10796,7 @@ static int VLight (Draw_Interpretor& theDi,
theDi << " Type: Spot\n";
theDi << " Intensity: " << aLight->Intensity() << "\n";
theDi << " Headlight: " << (aLight->Headlight() ? "TRUE" : "FALSE") << "\n";
theDi << " CastShadows:" << (aLight->ToCastShadows() ? "TRUE" : "FALSE") << "\n";
aLight->Position (anXYZ[0], anXYZ[1], anXYZ[2]);
theDi << " Position: " << anXYZ[0] << ", " << anXYZ[1] << ", " << anXYZ[2] << "\n";
aLight->Direction (anXYZ[0], anXYZ[1], anXYZ[2]);
@@ -11295,6 +11298,25 @@ static int VLight (Draw_Interpretor& theDi,
}
aLightCurr->SetHeadlight (isHeadLight);
}
else if (anArgCase.IsEqual ("-CASTSHADOW")
|| anArgCase.IsEqual ("-CASTSHADOWS")
|| anArgCase.IsEqual ("-SHADOWS"))
{
if (aLightCurr.IsNull()
|| aLightCurr->Type() == Graphic3d_TOLS_AMBIENT)
{
Message::SendFail() << "Syntax error at argument '" << anArg << "'";
return 1;
}
bool toCastShadows = true;
if (anArgIt + 1 < theArgsNb
&& Draw::ParseOnOff (theArgVec[anArgIt + 1], toCastShadows))
{
++anArgIt;
}
aLightCurr->SetCastShadows (toCastShadows);
}
else
{
Message::SendFail() << "Warning: unknown argument '" << anArg << "'";
@@ -11541,6 +11563,8 @@ static Standard_Integer VRenderParams (Draw_Interpretor& theDI,
theDI << "rayDepth: " << aParams.RaytracingDepth << "\n";
theDI << "fsaa: " << (aParams.IsAntialiasingEnabled ? "on" : "off") << "\n";
theDI << "shadows: " << (aParams.IsShadowEnabled ? "on" : "off") << "\n";
theDI << "shadowMapRes: " << aParams.ShadowMapResolution << "\n";
theDI << "shadowMapBias: " << aParams.ShadowMapBias << "\n";
theDI << "reflections: " << (aParams.IsReflectionEnabled ? "on" : "off") << "\n";
theDI << "gleam: " << (aParams.IsTransparentShadowEnabled ? "on" : "off") << "\n";
theDI << "GI: " << (aParams.IsGlobalIlluminationEnabled ? "on" : "off") << "\n";
@@ -11912,6 +11936,37 @@ static Standard_Integer VRenderParams (Draw_Interpretor& theDI,
}
aParams.IsShadowEnabled = toEnable;
}
else if (aFlag == "-shadowmapresolution"
|| aFlag == "-shadowmap")
{
if (toPrint)
{
theDI << aParams.ShadowMapResolution << " ";
continue;
}
else if (++anArgIter >= theArgNb)
{
Message::SendFail() << "Syntax error at argument '" << anArg << "'";
return 1;
}
aParams.ShadowMapResolution = Draw::Atoi (theArgVec[anArgIter]);
}
else if (aFlag == "-shadowmapbias")
{
if (toPrint)
{
theDI << aParams.ShadowMapBias << " ";
continue;
}
else if (++anArgIter >= theArgNb)
{
Message::SendFail() << "Syntax error at argument '" << anArg << "'";
return 1;
}
aParams.ShadowMapBias = (float )Draw::Atof (theArgVec[anArgIter]);
}
else if (aFlag == "-refl"
|| aFlag == "-reflections")
{
@@ -14824,6 +14879,7 @@ void ViewerTest::ViewerCommands(Draw_Interpretor& theCommands)
"\n -{dir}ection X Y Z (for directional light or for spotlight)"
"\n -color colorName"
"\n -{head}light 0|1"
"\n -castShadows 0|1"
"\n -{sm}oothness value"
"\n -{int}ensity value"
"\n -{constAtten}uation value"
@@ -14854,6 +14910,7 @@ void ViewerTest::ViewerCommands(Draw_Interpretor& theCommands)
"\n\t\t: vrenderparams [-raster] [-shadingModel {unlit|facet|gouraud|phong|pbr|pbr_facet}=gouraud]"
"\n\t\t: [-msaa 0..8=0] [-rendScale scale=1] [-resolution value=72]"
"\n\t\t: [-oit {off|0.0-1.0}=off]"
"\n\t\t: [-shadows {on|off}=on] [-shadowMapResolution value=1024] [-shadowMapBias value=0.005]"
"\n\t\t: [-depthPrePass {on|off}=off] [-alphaToCoverage {on|off}=on]"
"\n\t\t: [-frustumCulling {on|off|noupdate}=on] [-lineFeather width=1.0]"
"\n\t\t: [-sync {default|views}] [-reset]"
@@ -14867,6 +14924,9 @@ void ViewerTest::ViewerCommands(Draw_Interpretor& theCommands)
"\n\t\t: -oit Enables/disables order-independent transparency (OIT) rendering;"
"\n\t\t: weight OIT fixes transparency artifacts at the cost of blurry result,"
"\n\t\t: it is managed by depth weight factor (0.0 value also enables weight OIT)."
"\n\t\t: -shadows Enables/disables shadows rendering."
"\n\t\t: -shadowMapResolution Shadow texture map resolution."
"\n\t\t: -shadowMapBias Shadow map bias."
"\n\t\t: -depthPrePass Enables/disables depth pre-pass."
"\n\t\t: -frustumCulling Enables/disables objects frustum clipping or"
"\n\t\t: sets state to check structures culled previously."
@@ -14881,7 +14941,7 @@ void ViewerTest::ViewerCommands(Draw_Interpretor& theCommands)
"\n\t\t: -perfChart Show frame timers chart limited by specified number of frames."
"\n\t\t: -perfChartMax Maximum time in seconds with the chart."
"\n\t\t: Ray-Tracing options:"
"\n\t\t: vrenderparams [-rayTrace] [-rayDepth {0..10}=3] [-shadows {on|off}=on] [-reflections {on|off}=off]"
"\n\t\t: vrenderparams [-rayTrace] [-rayDepth {0..10}=3] [-reflections {on|off}=off]"
"\n\t\t: [-fsaa {on|off}=off] [-gleam {on|off}=off] [-env {on|off}=off]"
"\n\t\t: [-gi {on|off}=off] [-brng {on|off}=off]"
"\n\t\t: [-iss {on|off}=off] [-tileSize {1..4096}=32] [-nbTiles {64..1024}=256]"
@@ -14891,7 +14951,6 @@ void ViewerTest::ViewerCommands(Draw_Interpretor& theCommands)
"\n\t\t: [-exposure value=0.0] [-whitePoint value=1.0] [-toneMapping {disabled|filmic}=disabled]"
"\n\t\t: -rayTrace Enables GPU ray-tracing."
"\n\t\t: -rayDepth Defines maximum ray-tracing depth."
"\n\t\t: -shadows Enables/disables shadows rendering."
"\n\t\t: -reflections Enables/disables specular reflections."
"\n\t\t: -fsaa Enables/disables adaptive anti-aliasing."
"\n\t\t: -gleam Enables/disables transparency shadow effects."