Function main

examples/cpu/field.cpp:45–91

}

int main(void)
{
    /*
     * First Forge call should be a window creation call
     * so that necessary OpenGL context is created for any
     * other forge::* object to be created successfully
     */
    forge::Window wnd(DIMX, DIMY, "Vector Field Demo");
    wnd.makeCurrent();

    forge::Chart chart(FG_CHART_2D);
    chart.setAxesLimits(MINIMUM-1.0f, MAXIMUM, MINIMUM-1.0f, MAXIMUM);
    chart.setAxesTitles("x-axis", "y-axis");

    forge::Plot divPoints = chart.plot(4, forge::u32, FG_PLOT_SCATTER, FG_MARKER_CIRCLE);
    divPoints.setColor(0.9f, 0.9f, 0.0f, 1.f);
    divPoints.setLegend("Convergence Points");
    divPoints.setMarkerSize(24);

    forge::VectorField field = chart.vectorField((unsigned)(NELEMS*NELEMS), forge::f32);
    field.setColor(0.f, 0.6f, 0.3f, 1.f);

    std::vector<float> points;
    std::vector<float> dirs;
    generatePoints(points, dirs);

    GfxHandle* handles[3];

    createGLBuffer(&handles[0], divPoints.vertices(), FORGE_VERTEX_BUFFER);
    createGLBuffer(&handles[1], field.vertices(), FORGE_VERTEX_BUFFER);
    createGLBuffer(&handles[2], field.directions(), FORGE_VERTEX_BUFFER);

    copyToGLBuffer(handles[0], (ComputeResourceHandle)DPOINTS, divPoints.verticesSize());
    copyToGLBuffer(handles[1], (ComputeResourceHandle)points.data(), field.verticesSize());
    copyToGLBuffer(handles[2], (ComputeResourceHandle)dirs.data(), field.directionsSize());

    do {
        wnd.draw(chart);
    } while(!wnd.close());

    // destroy GL-cpu interop buffers
    releaseGLBuffer(handles[0]);
    releaseGLBuffer(handles[1]);
    releaseGLBuffer(handles[2]);

    return 0;
}