SPACETIME_3D
3D embedding-diagram style spacetime curvature demo. Turn on launch mode, click-drag on the surface to place and aim a photon, then release to watch the path bend near the mass. This is a visually intuitive approximation, not a full numerical Einstein-equation solver.
MASS 1.00
CURVATURE 1.45
RAY BEND 1.10
ORBIT — drag when launch mode is OFF
ZOOM — mouse wheel
PLACE PHOTON — turn launch mode ON, then click-drag on the grid and release
Each photon moves slowly at first, then curves into a visible inward spiral near the mass and accelerates smoothly as the radius decreases. Inside the strong-field region, the trajectory gradually becomes tangential, loops around the mass, then spirals inward toward capture. Captured photons redshift and fade instead of instantly disappearing. The surface is a 3D curvature visualization; the ray-bending dynamics are tuned for intuitive behavior.
event horizon photon trajectory trail