Light Through Doorway — 2D Simulation

Observer Irradiance

0W/m²

θ_source: 0° | θ_observer: 0°

Distance: 0 m

Visible arc: 0° | Angular: 0%

Ray Count 360

Light Intensity 0.6

Light Color

Doorway Position 50%

Show individual rays

Fill illuminated area

Physical Parameters

Source irradiance: 1000 W/m²

Room size: 12m × 20m

Door width: 1m

Observer: 0.67m × 0.25m

Model: cos⁴ illumination law

Light Source

Observer

Opaque Walls

Doorway Opening

Drag the doorway (green markers) to slide it along the wall. Drag the observer (blue center) to move it, or drag the circular handles at its ends to rotate. Light source is at the door center.