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@@ -1,10 +1,10 @@ - + Donut is a real-time renderer for Sagittarius A* (Sgr A*) that traces light through the curved spacetime surrounding the black hole. Each pixel is represented by a light ray originating from the camera. The ray is integrated through the Schwarzschild metric, allowing the renderer to reproduce gravitational lensing and the distortion of the surrounding accretion disk and background. The renderer runs on the GPU using compute shaders, allowing the scene to be explored interactively in real time. ## Screenshots - - + + ## Physics Donut uses the Schwarzschild solution to describe the spacetime around Sgr A*. The metric is (with $r_s = \frac{2GM}{c^2}$): |