visualisationState.h

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#ifndef VISUALISATIONSTATE_H
#define VISUALISATIONSTATE_H
 
#include <vector>
#include <map>
#include <cstdint>
#include <string>
#include <algorithm>
 
#include <GLFW/glfw3.h>
#include <lua.h>
 
#include <colour.h>
#include <bond.h>
#include <atom.h>
#include <element.h>
#include <LuaNumber.h>
#include <util.h>
#include <commandLine.h>
 
#include <record.h>
 
#ifdef WITH_FFMPEG
    #include <ffmpegRecord.h>
#else
    #include <jompegRecord.h>
#endif
 
struct VisualisationState
{
    VisualisationState
    (
        std::vector<Atom> & atoms,
        const std::filesystem::path & atomColours,
        uint64_t bondFocus,
        float bondCutoff,
        bool sizeByMass,
        const std::map<int, std::string> & keyCodes
    )
    : atoms(atoms)
    {
        std::set<Element> elements = uniqueElements(atoms);
        elementMap = elementIndices(atoms);
 
        atomEmphasisOverrides = std::vector<float>(atoms.size(), 1.0f);
 
        for (uint8_t i = 0; i < std::min(size_t(6), elements.size()); i++)
        {
            Element e = *std::next(elements.begin(), i);
            emphasisControls[GLFW_KEY_1+i] = e;
            std::cout << "Element " << e << " emphasis bound to key " << keyCodes.at(GLFW_KEY_1+i) << "\n";
        }
 
        if (!atomColours.empty())
        {
            atomColourOverrides = atomColoursFromFile(atomColours);
        }
 
        applyColours(atoms, atomColourOverrides);
 
        if (bondFocus < atoms.size())
        {
            bondsFor = {bondFocus};
        }
        else
        {
            bondsFor.resize(atoms.size());
            std::iota(bondsFor.begin(), bondsFor.end(), 0);
        }
 
        if (bondCutoff > 0.0)
        {
            bonds = determineBonds
            (
                bondsFor,
                atoms,
                bondCutoff
            );
        }
        atomCount = atoms.size();
 
        atomSizes.resize(atoms.size());
        if (!sizeByMass)
        {
            for (const auto & ei : elementMap)
            {
                atomSizes[ei.second] = ELEMENT_RADIUS.at(ei.first);
            }
        }
        else
        {
            for (const auto & ei : elementMap)
            {
                atomSizes[ei.second] = ELEMENT_MASS.at(ei.first);
            }
        }
        applySizes(atoms, atomSizes);
 
        text = "";
        frame = 0;
        elementsUpdated = true;
    }
 
    std::vector<Atom> & atoms;
    std::map<uint64_t, std::set<uint64_t>> bonds;
    std::vector<uint64_t> bondsFor;
    std::vector<float> atomEmphasisOverrides;
    std::map<uint64_t, glm::vec4> atomColourOverrides;
    std::vector<float> atomSizes;
    std::multimap<Element, uint64_t> elementMap;
    std::map<int, Element> emphasisControls;
    std::string text;
    uint64_t frame;
 
    uint64_t atomCount;
 
    std::unique_ptr<Record> record = nullptr;
 
    bool recording = false;
    bool recordClosing = false;
 
    bool elementsUpdated = false;
 
    bool recordWaiting() const { return waitingForRecord; }
 
    void toggleRecord(const CommandLine & options)
    {
        if (!recording)
        {
            std::string name = options.videoName.value;
            if (name == "") {  name = timeStamp()+std::string(".mp4"); }
            #ifdef WITH_FFMPEG
            record = std::make_unique<FFmpegRecord>
            (
                name,
                options.resolution.value,
                60,
                options.preset.value,
                options.profile.value,
                options.crf.value,
                options.cq.value,
                options.qp.value,
                options.codec.value,
                options.maxBFrames.value,
                options.gopSize.value
            );
            std::cout << "FFmpeg ";
            #else
            record = std::make_unique<JompegRecord>
            (
                name,
                options.resolution.value,
                60
            );
            std::cout << "jo_mpeg ";
            #endif
            std::cout << "recording to " + name + "\n";
            record->open();
            recording = true;
        }
        else if (recording)
        {
            if (record->finalise())
            {
                record.reset();
                recording = false;
            }
            else
            {
                recordClosing = true;
            }
        }
    }
 
    void recordFrame
    (
        uint32_t resX,
        uint32_t resY
    )
    {
        if (recordClosing || record == nullptr || (!record->isOpen()))
        {
            return;
        }
 
        if (!waitingForRecord)
        {
 
            std::vector<uint8_t> pixels(resX*resY*4, 0);
            glReadPixels
            (
                0,
                0,
                resX,
                resY,
                GL_RGBA,
                GL_UNSIGNED_BYTE,
                pixels.data()
            );
 
            for(int j = 0; j < int(resY/2); j++)
            {
                std::swap_ranges
                (
                    pixels.begin()+4*resX*j,
                    pixels.begin()+4*resX*(j+1),
                    pixels.begin()+4*resX*(resY-j-1)
                );
            }
 
            record->queueFrame(pixels);
        }
 
        if (record->queueSize() >= 32)
        {
            record->writeFrames();
        }
 
        if (record->framesLeft() >= 64)
        {
            waitingForRecord = true;
        }
        else
        {
            waitingForRecord = false;
        }
    }
 
    inline int lua_setAtomColour(lua_State * lua);
 
    inline int lua_getAtomColour(lua_State * lua);
 
    inline int lua_bond(lua_State * lua);
 
    inline int lua_unbond(lua_State * lua);
 
    inline int lua_getAtomsBonds(lua_State * lua);
 
    inline int lua_atomCount(lua_State * lua);
 
    inline int lua_getAtomsNeighbours(lua_State * lua);
 
    inline int lua_getAtom(lua_State * lua);
 
    inline int lua_setText(lua_State * lua);
 
    inline int lua_getFrame(lua_State * lua);
 
private:
 
    bool waitingForRecord = false;
 
};
 
#endif /* VISUALISATIONSTATE_H */
 
#include <luaBindings/visualisationState/atoms.h>
#include <luaBindings/visualisationState/bonds.h>
#include <luaBindings/visualisationState/utils.h>