SMX_PGE/sample/PGEX_SMX_Example.cpp

#define OLC_PGE_APPLICATION
#include "olcPixelGameEngine.h"
#include "PGEX_SMX.h"
#include "util.h"
using namespace olc;

class SMX_PGE : public olc::PixelGameEngine
{
    PGEX_SMX smx;
    bool paused = false;
    int mode = 0;
    vf2d playerPos = { 0,0 };
public:
    SMX_PGE()
    {
        sAppName = "SMX PGE";
    }

public:
    bool OnUserCreate() override
    {
        // Called once at the start, so create things here
        return true;
    }

    std::vector<vf2d>snow;
    std::vector<vf2d>backgroundSnow;

    float backgroundSnowIntervalTimer{0.03f};
    float backgroundSnowDirectionInterval{60.f};
    
    #define RIGHT true
    bool backgroundSnowDirection{RIGHT};
    float snowInterval{0.8f};
    float snowTimer{snowInterval};
    const float snowIntervalChangeInterval{60.f};
    float snowIntervalTimer{snowIntervalChangeInterval};
    double totalElapsedTime{};

    float fallSpd{6.f};
    float snowAmplitude{2.f};

    bool OnUserUpdate(float fElapsedTime) override
    {
        Clear({0,0,32});
        backgroundSnowIntervalTimer-=fElapsedTime;
        snowTimer-=fElapsedTime;
        snowIntervalTimer-=fElapsedTime;
        if(snowTimer<=0.f){
            snow.emplace_back(util::random(ScreenWidth()),-2.f);
            snowTimer=snowInterval;
        }
        if(backgroundSnowIntervalTimer<=0.f){
            backgroundSnowIntervalTimer=snowIntervalTimer*26.66666667f;
        }
        if(snowIntervalTimer<=0.f){
            snowInterval=util::random_range(0.1f,2.f);
            snowIntervalTimer=snowIntervalChangeInterval;
        }
        for(int ind{0};vf2d&snow:snow){
            snow.y+=fallSpd*fElapsedTime;
            srand(ind);
            FillCircle(vi2d{int(snow.x+sin(totalElapsedTime+ind*0.5f*fallSpd)*snowAmplitude),int(snow.y)},rand()%2+1,{uint8_t(200+rand()%55),uint8_t(235+rand()%20),255});
            ind++;
        }
        totalElapsedTime=fmod(totalElapsedTime+fElapsedTime,10000.);



        return true;
    }
};


int main()
{
    SMX_PGE demo;
    if (demo.Construct(24, 21, 50, 50))
        demo.Start();

    return 0;
}