Sketch to RISA

Tools

Read the sketch

Optional. Claude reads members, labels, sizes, dimensions, fixed-end triangles and base marks, then builds the model and sets the scale. Needs your own Anthropic API key here. No key? Read the sheet with your own Claude from the project page (copy the prompt, paste the answer); the tracer picks up that reading. Tracing by hand and Find lines always work.

Auto-detect lines

Ignore lines shorter than 8% of the box

Scale not set

View plane Round coordinates to Always lock horizontal or vertical

How to use

Open a PDF page or a photo of a sketch.
Read sketch builds the model from the sketch with Claude: nodes, labeled members, supports and scale. Check it, then fix anything with the tools below.
Set scale: click both ends of a known dimension and type its length, for example 24'-6" or 7.5 (feet).
Draw members: click node to node. Clicks snap to nearby nodes. Hold Shift to lock horizontal or vertical. Right-click or Esc ends a chain.
Supports: click a node to cycle its restraint.
Find lines (optional): drag a box around the framing. Suggested members show dashed. Remove extras with Delete, then Accept.
Export: copy the tables into RISA-3D spreadsheets, or import the DXF.

Pan: drag with the right or middle button, or hold Space. Zoom: mouse wheel.

Drop a PDF or image here