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// Copyright 2018 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include <GLFW/glfw3.h>
#include <functional>
#include "ArcballCamera.h"
#include "rkcommon/containers/TransactionalBuffer.h"
#include "rkcommon/math/box.h"
#include "rkcommon/math/vec.h"
// ospray
#include "ospray/ospray.h"
#include "ospray/ospray_cpp.h"
#include "ospray/ospray_cpp/ext/rkcommon.h"
struct WindowState
{
bool quit;
bool cameraChanged;
bool fbSizeChanged;
int spp;
rkcommon::math::vec2i windowSize;
rkcommon::math::vec3f eyePos;
rkcommon::math::vec3f lookDir;
rkcommon::math::vec3f upDir;
WindowState();
};
class GLFWDistribOSPRayWindow
{
public:
GLFWDistribOSPRayWindow(const rkcommon::math::vec2i &windowSize,
const rkcommon::math::box3f &worldBounds,
ospray::cpp::World world,
ospray::cpp::Renderer renderer);
~GLFWDistribOSPRayWindow();
static GLFWDistribOSPRayWindow *getActiveWindow();
ospray::cpp::World getWorld();
void setWorld(ospray::cpp::World newWorld);
void resetAccumulation();
void registerDisplayCallback(
std::function<void(GLFWDistribOSPRayWindow *)> callback);
void registerImGuiCallback(std::function<void()> callback);
void mainLoop();
void addObjectToCommit(OSPObject obj);
protected:
void reshape(const rkcommon::math::vec2i &newWindowSize);
void motion(const rkcommon::math::vec2f &position);
void display();
void startNewOSPRayFrame();
void waitOnOSPRayFrame();
void updateTitleBar();
static GLFWDistribOSPRayWindow *activeWindow;
rkcommon::math::vec2i windowSize;
rkcommon::math::box3f worldBounds;
ospray::cpp::World world = nullptr;
ospray::cpp::Renderer renderer = nullptr;
int mpiRank = -1;
int mpiWorldSize = -1;
// GLFW window instance
GLFWwindow *glfwWindow = nullptr;
// Arcball camera instance
std::unique_ptr<ArcballCamera> arcballCamera;
// OSPRay objects managed by this class
ospray::cpp::Camera camera = nullptr;
ospray::cpp::FrameBuffer framebuffer = nullptr;
ospray::cpp::Future currentFrame = nullptr;
// List of OSPRay handles to commit before the next frame
rkcommon::containers::TransactionalBuffer<OSPObject> objectsToCommit;
// OpenGL framebuffer texture
GLuint framebufferTexture = 0;
// optional registered display callback, called before every display()
std::function<void(GLFWDistribOSPRayWindow *)> displayCallback;
// toggles display of ImGui UI, if an ImGui callback is provided
bool showUi = true;
// optional registered ImGui callback, called during every frame to build UI
std::function<void()> uiCallback;
// FPS measurement of last frame
float latestFPS{0.f};
// The window state to be sent out over MPI to the other rendering processes
WindowState windowState;
};
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