ParticleEmitter.h

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#pragma once
#include "Node/ParametricModel.h"
 
namespace dyno
{
    class ParticleEmitter : public ParametricModel<DataType3f>
    {
    public:
        ParticleEmitter();
        virtual ~ParticleEmitter();
 
        uint sizeOfParticles() { return mPosition.size(); }
 
        DArray<Vec3f>& getPositions() { return mPosition; }
        DArray<Vec3f>& getVelocities() { return mVelocity; }
 
        std::string getNodeType() override;
 
    public:
        DEF_VAR(float, VelocityMagnitude, 1.0f, "Emitter Velocity");
        DEF_VAR(float, SamplingDistance, 0.005f, "Emitter Sampling Distance");
 
    protected:
        void updateStates() final;
        
        virtual void generateParticles();
 
        inline SquareMatrix<float, 3> rotationMatrix()
        {
            auto center = this->varLocation()->getData();
            auto rot_vec = this->varRotation()->getData();
 
            Quat<float> 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<float>(x_rad, Vec3f(1, 0, 0));
            quat = quat * Quat<float>(y_rad, Vec3f(0, 1, 0));
            quat = quat * Quat<float>(z_rad, Vec3f(0, 0, 1));
 
            return quat.toMatrix3x3();
        }
 
    protected:
        DArray<Vec3f> mPosition;
        DArray<Vec3f> mVelocity;
    };
}