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ovis: implement real-time shadows #2799

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Merged
merged 1 commit into from
Dec 26, 2020
Merged

ovis: implement real-time shadows #2799

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7 changes: 5 additions & 2 deletions modules/ovis/include/opencv2/ovis.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -52,7 +52,9 @@ enum SceneSettings
/// Apply anti-aliasing. The first window determines the setting for all windows.
SCENE_AA = 8,
/// Render off-screen without a window. Allows separate AA setting. Requires manual update via @ref WindowScene::update
SCENE_OFFSCREEN = 16
SCENE_OFFSCREEN = 16,
/// Enable real-time shadows in the scene. All entities cast shadows by default. Control via @ref ENTITY_CAST_SHADOWS
SCENE_SHADOWS = 32
};

enum MaterialProperty
Expand All @@ -74,7 +76,8 @@ enum EntityProperty
ENTITY_MATERIAL,
ENTITY_SCALE,
ENTITY_AABB_WORLD,
ENTITY_ANIMBLEND_MODE
ENTITY_ANIMBLEND_MODE,
ENTITY_CAST_SHADOWS
};

/**
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26 changes: 26 additions & 0 deletions modules/ovis/src/ovis.cpp
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Expand Up @@ -187,6 +187,7 @@ struct Application : public OgreBites::ApplicationContext, public OgreBites::Inp
uint32_t h;
int key_pressed;
int flags;
Ogre::MaterialPtr casterMat;

Application(const Ogre::String& _title, const Size& sz, int _flags)
: OgreBites::ApplicationContext("ovis"), mainWin(NULL), title(_title), w(sz.width),
Expand Down Expand Up @@ -287,6 +288,9 @@ struct Application : public OgreBites::ApplicationContext, public OgreBites::Inp
MaterialManager& matMgr = MaterialManager::getSingleton();
matMgr.setDefaultTextureFiltering(TFO_ANISOTROPIC);
matMgr.setDefaultAnisotropy(16);
casterMat = matMgr.create("DepthCaster", Ogre::RGN_INTERNAL);
casterMat->setLightingEnabled(false);
casterMat->setDepthBias(-1, -1);
}
};

Expand Down Expand Up @@ -318,6 +322,21 @@ class WindowSceneImpl : public WindowScene
RTShader::ShaderGenerator& shadergen = RTShader::ShaderGenerator::getSingleton();
shadergen.addSceneManager(sceneMgr); // must be done before we do anything with the scene

if (flags & SCENE_SHADOWS)
{
sceneMgr->setShadowTechnique(SHADOWTYPE_TEXTURE_MODULATIVE_INTEGRATED);
sceneMgr->setShadowTexturePixelFormat(PF_DEPTH32);
// arbitrary heuristic for shadowmap size
sceneMgr->setShadowTextureSize(std::max(sz.width, sz.height) * 2);
sceneMgr->setShadowCameraSetup(FocusedShadowCameraSetup::create());
sceneMgr->setShadowTextureCasterMaterial(app->casterMat);

// inject shadowmap into materials
const auto& schemeName = RTShader::ShaderGenerator::DEFAULT_SCHEME_NAME;
auto rs = shadergen.getRenderState(schemeName);
rs->addTemplateSubRenderState(shadergen.createSubRenderState("SGX_IntegratedPSSM3"));
}

sceneMgr->setAmbientLight(ColourValue(.1, .1, .1));
_createBackground();
}
Expand Down Expand Up @@ -716,6 +735,13 @@ class WindowSceneImpl : public WindowScene
SceneNode& node = _getSceneNode(sceneMgr, name);
switch(prop)
{
case ENTITY_CAST_SHADOWS:
{
Entity* ent = dynamic_cast<Entity*>(node.getAttachedObject(name));
CV_Assert(ent && "invalid entity");
ent->setCastShadows(bool(value[0]));
break;
}
case ENTITY_SCALE:
{
node.setScale(value[0], value[1], value[2]);
Expand Down