oalplus/002_hello_path.cpp

Shows the basic usage of OALplus by playing a soundCopyright 2008-2014 Matus Chochlik. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include <oalplus/al.hpp>
#include <oalplus/all.hpp>
#include <oalplus/alut.hpp>

#include <chrono>
#include <thread>

int main(int argc, char** argv)
{
    // open the default device
    oalplus::Device device;
    // create a context using the device and make it current
    oalplus::CurrentContext context(
        device,
        oalplus::ContextAttribs()
            .Add(oalplus::ContextAttrib::MonoSources, 1)
            .Get()
    );
    // create an instance of ALUT
    oalplus::ALUtilityToolkit alut(false, argc, argv);
    // create a listener and set its position, velocity and orientation
    oalplus::Listener listener;
    listener.Position(0.0f, 0.0f, 0.0f);
    listener.Velocity(0.0f, 0.0f, 0.0f);
    listener.Orientation(0.0f, 0.0f,-1.0f, 0.0f, 1.0f, 0.0f);
    // create a Hello World sound and store it into a buffer
    oalplus::Buffer buffer = alut.CreateBufferHelloWorld();
    // create a source from the data in buffer and set enable looping
    oalplus::Source source(oalplus::ObjectDesc("Source"));
    source.Buffer(buffer);
    source.Looping(true);
    source.ReferenceDistance(15);
    // let the source play the sound
    source.Play();
    // the path of the source
    oalplus::CubicBezierLoop<oalplus::Vec3f, double> path({
        oalplus::Vec3f( 0.0f, 0.0f, -9.0f),
        oalplus::Vec3f( 9.0f, 2.0f, -8.0f),
        oalplus::Vec3f( 4.0f,-3.0f,  9.0f),
        oalplus::Vec3f(-3.0f, 4.0f,  9.0f),
        oalplus::Vec3f(-9.0f,-1.0f, -7.0f)
    });
    //
    // play the sound for a while
    typedef std::chrono::system_clock clock;
    typedef std::chrono::time_point<clock> time_point;

    time_point start = clock::now();

    while(true)
    {
        double t = double((clock::now() - start).count())*
            double(clock::period::num)/
            double(clock::period::den);
        if(t > 10.0) break;
        source.Position(path.Position(t/5.0));
        // wait for a while
        std::chrono::milliseconds duration(10);
        std::this_thread::sleep_for(duration);
    }
    //
    return 0;
}