#include "framegraph.h"

#include <Qt3DRender/QCamera>

#include <Qt3DRender/QCameraSelector>

#include <Qt3DRender/QClearBuffers>

#include <Qt3DRender/QClipPlane>

#include <Qt3DRender/QCullFace>

#include <Qt3DRender/QRenderSettings>

#include <Qt3DRender/QRenderStateSet>

#include <Qt3DRender/QRenderSurfaceSelector>

#include <Qt3DRender/QViewport>

using namespace Mildred;

//! Create the framegraph

/*!

* Create a suitable framegraph for the supplied QRenderSettings @param parent and specified @param surface.

* @param camera

*

* The framegraph is constructed with the following structure:

*

* [QRenderSettings] Parent of first framegraph node

* |

* QSurfaceSelector Sets the target surface for the renderer

* |

* QViewport Defines the viewport on the target surface

* |

* QClearBuffers Sets the targets to clear and the default attributes to clear to

* |

* QCameraSelector Selects an existing camera to view the scenegraph

*/

void MildredFrameGraph::create(Qt3DRender::QRenderSettings *parent, Qt3DExtras::Qt3DWindow *surface,

Qt3DRender::QCamera *camera)

{

// Set our rendering surface

auto *surfaceSelector = new Qt3DRender::QRenderSurfaceSelector(parent);

surfaceSelector->setSurface(surface);

// Define a viewport to cover the entire surface

auto *viewport = new Qt3DRender::QViewport(surfaceSelector);

viewport->setNormalizedRect({0.0, 0.0, 1.0, 1.0});

// Clear to background colour

auto *clearBuffers = new Qt3DRender::QClearBuffers(viewport);

clearBuffers->setBuffers(Qt3DRender::QClearBuffers::ColorDepthBuffer);

clearBuffers->setClearColor(QColor(255, 255, 255, 255));

// Set the camera to the one which was passed in

auto *cameraSelector = new Qt3DRender::QCameraSelector(clearBuffers);

cameraSelector->setCamera(camera);

// Create a render state set

auto *renderStateSet = new Qt3DRender::QRenderStateSet(cameraSelector);

// -- Enable six clip planes for the data viewing volume

for (auto n = 0; n < 6; ++n)

{

auto *cp = new Qt3DRender::QClipPlane;

cp->setPlaneIndex(n);

cp->setEnabled(true);

renderStateSet->addRenderState(cp);

}

auto *cull = new Qt3DRender::QCullFace();

cull->setMode(Qt3DRender::QCullFace::NoCulling);

renderStateSet->addRenderState(cull);

// Finally, set the active framegraph of the QRenderSettings to the top node of our framegraph

parent->setActiveFrameGraph(surfaceSelector);

}