ParticleEmitter.h

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#pragma once
#include "Node/ParametricModel.h"
 
namespace dyno
{
    template<typename TDataType>
    class ParticleEmitter : public ParametricModel<TDataType>
    {
    public:
        typedef typename TDataType::Real Real;
        typedef typename TDataType::Coord Coord;
 
        ParticleEmitter();
        ~ParticleEmitter() override;
 
        uint sizeOfParticles() { return mPosition.size(); }
 
        DArray<Coord>& getPositions() { return mPosition; }
        DArray<Coord>& getVelocities() { return mVelocity; }
 
        std::string getNodeType() override;
 
    public:
        DEF_VAR(Real, VelocityMagnitude, 1, "Emitter Velocity");
        DEF_VAR(Real, SamplingDistance, 0.005, "Emitter Sampling Distance");
 
        DEF_VAR(Real, Spacing, Real(1), "A variable to control the particle generation frequency");
 
        //DEF_VAR(Coord, InitialVelocity, Coord(0, -1, 0), "Initial velocity");
 
    protected:
        void resetStates() override;
 
        void updateStates() final;
        
        virtual void generateParticles();
 
        inline SquareMatrix<Real, 3> rotationMatrix()
        {
            auto center = this->varLocation()->getData();
            auto rot_vec = this->varRotation()->getData();
 
            Quat<Real> quat = Quat<float>::identity();
            float x_rad = rot_vec[0] / 180.0f * M_PI;
            float y_rad = rot_vec[1] / 180.0f * M_PI;
            float z_rad = rot_vec[2] / 180.0f * M_PI;
 
            quat = quat * Quat<Real>(x_rad, Coord(1, 0, 0));
            quat = quat * Quat<Real>(y_rad, Coord(0, 1, 0));
            quat = quat * Quat<Real>(z_rad, Coord(0, 0, 1));
 
            return quat.toMatrix3x3();
        }
 
    protected:
        DArray<Coord> mPosition;
        DArray<Coord> mVelocity;
 
        Real mTimeInterval = 0;
    };
}