Member Avatar for Dili1234
Dili1234 -2 Junior Poster

I'm doing a project about lighting.I don't know how tp draw beams does anybody know about it?

Edited by pritaeas because: Moved to Windows.
  • 1 Contributor
  • 0 Replies
  • 138 Views

Dani AI

Generated

The question from asks how to "draw beams" in DIALux. That can mean two different things, so the approach below separates the engineering (photometric) workflow from the visual (volumetric) visualization and gives practical steps and quick checks.

For lighting calculations (what DIALux is built for)

  • Use the luminaire photometric file (IES or EULUMDAT/.ldt). DIALux uses that file to compute illuminance and the luminous intensity distribution; beams are not hand-drawn but generated from the photometry.
  • Basic workflow: obtain the IES/ldt, import/create the luminaire in DIALux, place and orient it in the model, run the calculation grid, then inspect the polar/candela plots and false‑color illuminance maps to understand the beam spread.
  • To get a beam footprint on a surface: use the beam half-angle. If the manufacturer gives a full beam angle at 50% intensity, half-angle = full_angle/2. Footprint radius = tan(half_angle) mounting_height (same units). Example: 40° full angle → 20° half-angle; at 3 m height radius ≈ tan(20°)3 ≈ 1.09 m.

For visible, volumetric light beams (rendered cones in air)

  • DIALux is calculation-focused and does not produce photorealistic volumetric fog beams the way dedicated renderers do. For eye‑catching beam effects, export the geometry and luminaires to a renderer (Blender, 3ds Max, Lumion) that supports volumetric scattering, keep the photometric data for directionality, and enable participating media in the renderer.

Quick troubleshooting checklist

  • Confirm correct photometric file format and that the luminaire orientation/tilt is set properly.
  • Check units and grid resolution (finer grid for smaller, sharper beams).
  • Verify whether DIALux Classic or DIALux evo is being used: menu names and export options vary between versions.

For an engineering project, include both the calculated lux maps and the manufacturer’s photometric diagrams to document the beam geometry and justify any drawn footprints.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.