Reflector::Reflector(Object3D* parent, SceneGraph::DrawableGroup3D* group): Object3D(parent), SceneGraph::Drawable3D(*this, group) {
CubeMapResourceManager& resourceManager = CubeMapResourceManager::instance();
/* Sphere mesh */
if(!(_sphere = resourceManager.get<GL::Mesh>("sphere"))) {
Trade::MeshData3D sphereData = Primitives::uvSphereSolid(16, 32, Primitives::UVSphereTextureCoords::Generate);
GL::Buffer* buffer = new GL::Buffer;
buffer->setData(MeshTools::interleave(sphereData.positions(0), sphereData.textureCoords2D(0)), GL::BufferUsage::StaticDraw);
Containers::Array<char> indexData;
MeshIndexType indexType;
UnsignedInt indexStart, indexEnd;
std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(sphereData.indices());
GL::Buffer* indexBuffer = new GL::Buffer;
indexBuffer->setData(indexData, GL::BufferUsage::StaticDraw);
GL::Mesh* mesh = new GL::Mesh;
mesh->setPrimitive(sphereData.primitive())
.setCount(sphereData.indices().size())
.addVertexBuffer(*buffer, 0, ReflectorShader::Position{}, ReflectorShader::TextureCoords{})
.setIndexBuffer(*indexBuffer, 0, indexType, indexStart, indexEnd);
resourceManager.set("sphere-buffer", buffer, ResourceDataState::Final, ResourcePolicy::Resident)
.set("sphere-index-buffer", indexBuffer, ResourceDataState::Final, ResourcePolicy::Resident)
.set(_sphere.key(), mesh, ResourceDataState::Final, ResourcePolicy::Resident);
}
/* Tarnish texture */
if(!(_tarnishTexture = resourceManager.get<GL::Texture2D>("tarnish-texture"))) {
Resource<Trade::AbstractImporter> importer = resourceManager.get<Trade::AbstractImporter>("jpeg-importer");
Utility::Resource rs("data");
importer->openData(rs.getRaw("tarnish.jpg"));
Containers::Optional<Trade::ImageData2D> image = importer->image2D(0);
CORRADE_INTERNAL_ASSERT(image);
auto texture = new GL::Texture2D;
texture->setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Linear)
.setMinificationFilter(GL::SamplerFilter::Linear, GL::SamplerMipmap::Linear)
.setStorage(Math::log2(image->size().min())+1, GL::TextureFormat::RGB8, image->size())
.setSubImage(0, {}, *image)
.generateMipmap();
resourceManager.set<GL::Texture2D>(_tarnishTexture.key(), texture, ResourceDataState::Final, ResourcePolicy::Resident);
}
/* Reflector shader */
if(!(_shader = resourceManager.get<GL::AbstractShaderProgram, ReflectorShader>("reflector-shader")))
resourceManager.set<GL::AbstractShaderProgram>(_shader.key(), new ReflectorShader, ResourceDataState::Final, ResourcePolicy::Resident);
/* Texture (created in CubeMap class) */
_texture = resourceManager.get<GL::CubeMapTexture>("texture");
}
void AreaLightsExample::keyPressEvent(KeyEvent& event) {
/* If an input is focused, pass the events only to the UI */
if(isTextInputActive() && _ui->focusedInputWidget()) {
if(!_ui->focusedInputWidget()->handleKeyPress(event)) return;
/* Movement */
} else if(event.key() == KeyEvent::Key::W) {
_cameraDirection = -_view.inverted().backward()*0.01f;
} else if(event.key() == KeyEvent::Key::S) {
_cameraDirection = _view.inverted().backward()*0.01f;
} else if (event.key() == KeyEvent::Key::A) {
_cameraDirection = Math::cross(_view.inverted().backward(), {0.0f, 1.0f, 0.0})*0.01f;
} else if (event.key() == KeyEvent::Key::D) {
_cameraDirection = -Math::cross(_view.inverted().backward(), { 0.0f, 1.0f, 0.0 })*0.01f;
/* Increase/decrease roughness */
} else if(event.key() == KeyEvent::Key::R) {
_roughness = Math::clamp(
_roughness + 0.01f*(event.modifiers() & KeyEvent::Modifier::Shift ? -1 : 1),
0.1f, 1.0f);
_areaLightShader.setRoughness(_roughness);
_baseUiPlane->roughness.setValue(Utility::formatString("{:.5}", _roughness));
/* Increase/decrease metalness */
} else if(event.key() == KeyEvent::Key::M) {
_metalness = Math::clamp(
_metalness + 0.01f*(event.modifiers() & KeyEvent::Modifier::Shift ? -1 : 1),
0.1f, 1.0f);
_areaLightShader.setMetalness(_metalness);
_baseUiPlane->metalness.setValue(Utility::formatString("{:.5}", _metalness));
/* Increase/decrease f0 */
} else if(event.key() == KeyEvent::Key::F) {
_f0 = Math::clamp(
_f0 + 0.01f*(event.modifiers() & KeyEvent::Modifier::Shift ? -1 : 1),
0.1f, 1.0f);
_areaLightShader.setF0(_f0);
_baseUiPlane->f0.setValue(Utility::formatString("{:.5}", _f0));
/* Reload shader */
} else if(event.key() == KeyEvent::Key::F5) {
#ifdef CORRADE_IS_DEBUG_BUILD
Utility::Resource::overrideGroup("arealights-data", "../src/arealights/resources.conf");
_areaLightShader = AreaLightShader{};
#endif
} else return;
redraw();
}
void AreaLightsExample::mousePressEvent(MouseEvent& event) {
if((event.button() == MouseEvent::Button::Left))
_previousMousePosition = event.position();
if(!_ui->handlePressEvent(event.position())) return;
redraw();
}
void AreaLightsExample::mouseMoveEvent(MouseMoveEvent& event) {
if(_ui->handleMoveEvent(event.position())) {
/* UI handles it */
} else if((event.buttons() & MouseMoveEvent::Button::Left)) {
const Vector2 delta = 3.0f*
Vector2{event.position() - _previousMousePosition}/Vector2{GL::defaultFramebuffer.viewport().size()};
_cameraRotation += delta;
_previousMousePosition = event.position();
} else return;
redraw();
}
void AreaLightsExample::textInputEvent(TextInputEvent& event) {
if(isTextInputActive() && _ui->focusedInputWidget() && _ui->focusedInputWidget()->handleTextInput(event))
redraw();
}
void AreaLightsExample::mouseReleaseEvent(MouseEvent& event) {
if(_ui->handleReleaseEvent(event.position()))
redraw();
}
void AreaLightsExample::drawEvent() {
GL::defaultFramebuffer.clear(GL::FramebufferClear::Color|GL::FramebufferClear::Depth);
/* Update view matrix */
_cameraPosition += _cameraDirection;
_view = Matrix4::rotationX(Rad{_cameraRotation.y()})*
Matrix4::rotationY(Rad{_cameraRotation.x()})*
Matrix4::translation(-_cameraPosition);
/* Draw light on the floor. Cheat a bit and just add everything together,
enabling depth test for the first only. Will work as long as the
background is black. */
GL::Renderer::enable(GL::Renderer::Feature::Blending);
GL::Renderer::setBlendFunction(GL::Renderer::BlendFunction::One, GL::Renderer::BlendFunction::One);
_areaLightShader.bindTextures(_ltcMat, _ltcAmp);
for(std::size_t i: {0, 1, 2}) {
Vector3 quadPoints[4];
for(std::size_t p: {0, 1, 2, 3})
quadPoints[p] = _lightTransform[i].transformPoint(LightVertices[p].position);
_areaLightShader
.setTransformationMatrix(_transformation)
.setProjectionMatrix(_projection)
.setViewMatrix(_view)
.setNormalMatrix(_transformation.rotationScaling())
.setViewPosition(_view.invertedRigid().translation())
.setLightQuad(quadPoints)
.setBaseColor(_lightColor[i])
.setLightIntensity(_lightIntensity[i])
.setTwoSided(_lightTwoSided[i]);
if(i == 0)
GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
_plane.draw(_areaLightShader);
if(i == 0)
GL::Renderer::disable(GL::Renderer::Feature::DepthTest);
}
GL::Renderer::disable(GL::Renderer::Feature::Blending);
/* Draw light visualization, this time with depth test enabled for all.
Draw twice for two-sided lights. */
GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
for(std::size_t i: {0, 1, 2}) {
_flatShader.setColor(_lightColor[i]*_lightIntensity[i]*1.25f)
.setTransformationProjectionMatrix(_projection*_view*_lightTransform[i]);
_plane.draw(_flatShader);
if(_lightTwoSided[i]) {
_flatShader.setTransformationProjectionMatrix(_projection*_view*_lightTransform[i]*Matrix4::scaling(Vector3::xScale(-1.0f)));
_plane.draw(_flatShader);
}
}
GL::Renderer::disable(GL::Renderer::Feature::DepthTest);
/* Draw the UI */
GL::Renderer::enable(GL::Renderer::Feature::Blending);
GL::Renderer::setBlendFunction(GL::Renderer::BlendFunction::One, GL::Renderer::BlendFunction::OneMinusSourceAlpha);
_ui->draw();
GL::Renderer::setBlendFunction(GL::Renderer::BlendFunction::One, GL::Renderer::BlendFunction::One);
GL::Renderer::disable(GL::Renderer::Feature::Blending);
/* Redraw only if moving somewhere */
swapBuffers();
if(!_cameraDirection.isZero()) redraw();
}
AreaLightsExample::AreaLightsExample(const Arguments& arguments): Platform::Application{arguments, NoCreate} {
/* Try to create multisampled context, but be nice and fall back if not
available. Enable only 2x MSAA if we have enough DPI. */
{
const Vector2 dpiScaling = this->dpiScaling({});
Configuration conf;
conf.setTitle("Magnum Area Lights Example")
.setSize(conf.size(), dpiScaling);
GLConfiguration glConf;
glConf.setSampleCount(dpiScaling.max() < 2.0f ? 8 : 2);
if(!tryCreate(conf, glConf))
create(conf, glConf.setSampleCount(0));
}
/* Make it all DARK, eanble face culling so one-sided lights are properly
visualized */
GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);
GL::Renderer::setClearColor(0x000000_rgbf);
/* Setup the plane mesh, which will be used for both the floor and light
visualization */
_vertices = GL::Buffer{};
_vertices.setData(LightVertices, GL::BufferUsage::StaticDraw);
_plane = GL::Mesh{};
_plane.setPrimitive(GL::MeshPrimitive::TriangleFan)
.addVertexBuffer(_vertices, 0, Shaders::Generic3D::Position{}, Shaders::Generic3D::Normal{})
.setCount(Containers::arraySize(LightVertices));
/* Setup project and floor plane tranformation matrix */
_projection = Matrix4::perspectiveProjection(60.0_degf, 4.0f/3.0f, 0.1f, 50.0f);
_transformation = Matrix4::rotationX(-90.0_degf)*Matrix4::scaling(Vector3{25.0f});
/* Load LTC matrix and BRDF textures */
PluginManager::Manager<Trade::AbstractImporter> manager;
Containers::Pointer<Trade::AbstractImporter> importer = manager.loadAndInstantiate("DdsImporter");
if(!importer) std::exit(1);
const Utility::Resource rs{"arealights-data"};
if(!importer->openData(rs.getRaw("ltc_amp.dds")))
std::exit(2);
/* Set texture data and parameters */
Containers::Optional<Trade::ImageData2D> image = importer->image2D(0);
CORRADE_INTERNAL_ASSERT(image);
_ltcAmp = GL::Texture2D{};
_ltcAmp.setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Linear)
.setMinificationFilter(GL::SamplerFilter::Linear)
.setStorage(1, GL::TextureFormat::RG32F, image->size())
.setSubImage(0, {}, *image);
if(!importer->openData(rs.getRaw("ltc_mat.dds")))
std::exit(2);
/* Set texture data and parameters */
image = importer->image2D(0);
CORRADE_INTERNAL_ASSERT(image);
_ltcMat = GL::Texture2D{};
_ltcMat.setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Linear)
.setMinificationFilter(GL::SamplerFilter::Linear)
.setStorage(1, GL::TextureFormat::RGBA32F, image->size())
.setSubImage(0, {}, *image);
/* Compile shaders */
_areaLightShader = AreaLightShader{};
_flatShader = Shaders::Flat3D{};
/* Create the UI */
_ui.emplace(Vector2{windowSize()}/dpiScaling(), windowSize(), framebufferSize(), Ui::mcssDarkStyleConfiguration(), "ƒ₀");
Interconnect::connect(*_ui, &Ui::UserInterface::inputWidgetFocused, *this, &AreaLightsExample::startTextInput);
Interconnect::connect(*_ui, &Ui::UserInterface::inputWidgetBlurred, *this, &AreaLightsExample::stopTextInput);
/* Base UI plane */
_baseUiPlane.emplace(*_ui);
Interconnect::connect(_baseUiPlane->metalness, &Ui::Input::valueChanged, *this, &AreaLightsExample::enableApplyButton);
Interconnect::connect(_baseUiPlane->roughness, &Ui::Input::valueChanged, *this, &AreaLightsExample::enableApplyButton);
Interconnect::connect(_baseUiPlane->f0, &Ui::Input::valueChanged, *this, &AreaLightsExample::enableApplyButton);
Interconnect::connect(_baseUiPlane->apply, &Ui::Button::tapped, *this, &AreaLightsExample::apply);
Interconnect::connect(_baseUiPlane->reset, &Ui::Button::tapped, *this, &AreaLightsExample::reset);
/* Apply the default values */
apply();
}
CubeMap::CubeMap(const std::string& prefix, Object3D* parent, SceneGraph::DrawableGroup3D* group): Object3D(parent), SceneGraph::Drawable3D(*this, group) {
CubeMapResourceManager& resourceManager = CubeMapResourceManager::instance();
/* Cube mesh */
if(!(_cube = resourceManager.get<GL::Mesh>("cube"))) {
Trade::MeshData3D cubeData = Primitives::cubeSolid();
MeshTools::flipFaceWinding(cubeData.indices());
GL::Buffer* buffer = new GL::Buffer;
buffer->setData(MeshTools::interleave(cubeData.positions(0)), GL::BufferUsage::StaticDraw);
Containers::Array<char> indexData;
MeshIndexType indexType;
UnsignedInt indexStart, indexEnd;
std::tie(indexData, indexType, indexStart, indexEnd) = MeshTools::compressIndices(cubeData.indices());
GL::Buffer* indexBuffer = new GL::Buffer;
indexBuffer->setData(indexData, GL::BufferUsage::StaticDraw);
GL::Mesh* mesh = new GL::Mesh;
mesh->setPrimitive(cubeData.primitive())
.setCount(cubeData.indices().size())
.addVertexBuffer(*buffer, 0, CubeMapShader::Position{})
.setIndexBuffer(*indexBuffer, 0, indexType, indexStart, indexEnd);
resourceManager.set("cube-buffer", buffer, ResourceDataState::Final, ResourcePolicy::Resident)
.set("cube-index-buffer", indexBuffer, ResourceDataState::Final, ResourcePolicy::Resident)
.set(_cube.key(), mesh, ResourceDataState::Final, ResourcePolicy::Resident);
}
/* Cube map texture */
if(!(_texture = resourceManager.get<GL::CubeMapTexture>("texture"))) {
GL::CubeMapTexture* cubeMap = new GL::CubeMapTexture;
cubeMap->setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Linear)
.setMinificationFilter(GL::SamplerFilter::Linear, GL::SamplerMipmap::Linear);
Resource<Trade::AbstractImporter> importer = resourceManager.get<Trade::AbstractImporter>("jpeg-importer");
/* Configure texture storage using size of first image */
importer->openFile(prefix + "+x.jpg");
Containers::Optional<Trade::ImageData2D> image = importer->image2D(0);
CORRADE_INTERNAL_ASSERT(image);
Vector2i size = image->size();
cubeMap->setStorage(Math::log2(size.min())+1, GL::TextureFormat::RGB8, size)
.setSubImage(GL::CubeMapCoordinate::PositiveX, 0, {}, *image);
importer->openFile(prefix + "-x.jpg");
CORRADE_INTERNAL_ASSERT_OUTPUT(image = importer->image2D(0));
cubeMap->setSubImage(GL::CubeMapCoordinate::NegativeX, 0, {}, *image);
importer->openFile(prefix + "+y.jpg");
CORRADE_INTERNAL_ASSERT_OUTPUT(image = importer->image2D(0));
cubeMap->setSubImage(GL::CubeMapCoordinate::PositiveY, 0, {}, *image);
importer->openFile(prefix + "-y.jpg");
CORRADE_INTERNAL_ASSERT_OUTPUT(image = importer->image2D(0));
cubeMap->setSubImage(GL::CubeMapCoordinate::NegativeY, 0, {}, *image);
importer->openFile(prefix + "+z.jpg");
CORRADE_INTERNAL_ASSERT_OUTPUT(image = importer->image2D(0));
cubeMap->setSubImage(GL::CubeMapCoordinate::PositiveZ, 0, {}, *image);
importer->openFile(prefix + "-z.jpg");
CORRADE_INTERNAL_ASSERT_OUTPUT(image = importer->image2D(0));
cubeMap->setSubImage(GL::CubeMapCoordinate::NegativeZ, 0, {}, *image);
cubeMap->generateMipmap();
resourceManager.set(_texture.key(), cubeMap, ResourceDataState::Final, ResourcePolicy::Manual);
}
/* Shader */
if(!(_shader = resourceManager.get<GL::AbstractShaderProgram, CubeMapShader>("shader")))
resourceManager.set<GL::AbstractShaderProgram>(_shader.key(), new CubeMapShader, ResourceDataState::Final, ResourcePolicy::Manual);
}