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31 lines
824 B
31 lines
824 B
#include <opencv2/viz2d/viz2d.hpp> |
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#include <opencv2/viz2d/nvg.hpp> |
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using namespace cv; |
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using namespace cv::viz; |
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constexpr int WIDTH = 1280; |
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constexpr int HEIGHT = 720; |
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int main(int argc, char** argv) { |
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Ptr<Viz2D> v2d = Viz2D::make(Size(WIDTH, HEIGHT), "Vector Graphics"); |
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//Creates a NanoVG context and draws a cross-hair on the framebuffer |
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v2d->nvg([](const Size& sz) { |
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//Calls from this namespace may only be used inside a nvg context |
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using namespace cv::viz::nvg; |
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//Draws a cross hair |
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beginPath(); |
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strokeWidth(3.0); |
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strokeColor(Scalar(0,0,255,255)); //BGRA |
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moveTo(sz.width/2.0, 0); |
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lineTo(sz.width/2.0, sz.height); |
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moveTo(0, sz.height/2.0); |
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lineTo(sz.width, sz.height/2.0); |
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stroke(); |
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}); |
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//Display the framebuffer in the native window in an endless loop |
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v2d->run(v2d->display); |
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} |
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