gistfile1.txt

    auto tfn = fn_handle{new TerrainFn};
    
    thickness = 10.0f;
    layerIdx = 1;
    tfn = fn_handle{new PlaneLayer(std::move(tfn), layerIdx++, elev, 100.0f)};
    tfn = fn_handle{new Turbulate(std::move(tfn), turbScl, turbAmp)};
    elev += thickness;
    
    layerIdx = igneous;
    for(int j = 0; j < 4; ++j)
    {
        tfn = fn_handle{new PlaneLayer(std::move(tfn), layerIdx++, elev, 100.0f)};
        tfn = fn_handle{new Turbulate(std::move(tfn), turbScl, turbAmp)};
        elev += thickness;
    }
    
    thickness = 5.0f;
    layerIdx = metamorphics;
    for(int j = 0; j < 8; ++j)
    {
        tfn = fn_handle{new PlaneLayer(std::move(tfn), layerIdx++, elev, 100.0f)};
        tfn = fn_handle{new Turbulate(std::move(tfn), turbScl, turbAmp)};
        elev += thickness;
    }
    
    layerIdx = sedimentary;
    for(int j = 0; j < 8; ++j)
    {
        tfn = fn_handle{new PlaneLayer(std::move(tfn), layerIdx++, elev, 100.0f)};
        tfn = fn_handle{new Turbulate(std::move(tfn), turbScl, turbAmp)};
        elev += thickness;
    }
    
    
    tfn = fn_handle{new Fault(std::move(tfn), mk_vec4(0.0f, elev, 0.0f), mk_vec4(1.0f, 1.0f, 0.0f), 20.0)};
    
    tfn = fn_handle{new Fault(std::move(tfn), mk_vec4(-200.0f, elev, 0.0f), mk_vec4(1.0f, 1.0f, 0.0f), 20.0)};
    
    SimpleImage output(1024, 512, 3);
    for(int ix = 0; ix < output.width; ++ix)
    for(int iy = 0; iy < output.height; ++iy)
    {
        float x = ix - output.width/2.0f, y = iy - output.height/2.0f;
        VolumeVal val = (*tfn)(mk_vec4<float>(x, y, 0.5f));
        output.SetPixelRGB(ix, iy, colors[val.type]);
    }
    TargaFileInfo::Write("testout.tga", output);