Function main

examples/opencl/stream.cpp:140–201

}

int main(void)
{
    try {
        /*
         * 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, "3D Vector Field Demo");
        wnd.makeCurrent();

        forge::Chart chart(FG_CHART_3D);
        chart.setAxesLimits(MINIMUM-1.0f, MAXIMUM,
                            MINIMUM-1.0f, MAXIMUM,
                            MINIMUM-1.0f, MAXIMUM);
        chart.setAxesTitles("x-axis", "y-axis", "z-axis");

        int numElems = NELEMS*NELEMS*NELEMS;
        forge::VectorField field = chart.vectorField(numElems, forge::f32);
        field.setColor(0.f, 1.f, 0.f, 1.f);

        /*
         * Helper function to create a CLGL interop context.
         * This function checks for if the extension is available
         * and creates the context on the appropriate device.
         * Note: context and queue are defined in cl_helpers.h
         */
        context = createCLGLContext(wnd);
        Device device = context.getInfo<CL_CONTEXT_DEVICES>()[0];
        queue = CommandQueue(context, device);

        cl::Buffer points(context, CL_MEM_READ_WRITE, sizeof(float)*3*numElems);
        cl::Buffer colors(context, CL_MEM_READ_WRITE, sizeof(float)*3*numElems);
        cl::Buffer dirs(context, CL_MEM_READ_WRITE, sizeof(float)*3*numElems);

        GfxHandle* handles[3];
        createGLBuffer(&handles[0], field.vertices(), FORGE_VERTEX_BUFFER);
        createGLBuffer(&handles[1], field.colors(), FORGE_VERTEX_BUFFER);
        createGLBuffer(&handles[2], field.directions(), FORGE_VERTEX_BUFFER);

        generatePoints(points, dirs, colors, queue, device);

        copyToGLBuffer(handles[0], (ComputeResourceHandle)points(), field.verticesSize());
        copyToGLBuffer(handles[1], (ComputeResourceHandle)colors(),   field.colorsSize());
        copyToGLBuffer(handles[2], (ComputeResourceHandle)dirs(), field.directionsSize());

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

        releaseGLBuffer(handles[0]);
        releaseGLBuffer(handles[1]);
        releaseGLBuffer(handles[2]);

    } catch (forge::Error err) {
        std::cout << err.what() << "(" << err.err() << ")" << std::endl;
    } catch (cl::Error err) {
        std::cout << err.what() << "(" << err.err() << ")" << std::endl;