export.sh

#!/bin/bash
# SpeedsterAI — STL Export Pipeline
# Exports print-ready front and back half STLs from speedster-ai.scad
#
# Usage: ./export.sh [output_dir]
#   output_dir defaults to ./models/
#
# Output files:
#   speedster-ai-front.stl  — Front half (print baffle-face down, already oriented)
#   speedster-ai-back.stl   — Back half (print flat back-face down, rotated 180°)
#
# Requires OpenSCAD installed at the standard macOS location.
# Full renders take ~2-3 minutes per half.

set -e

SCAD="speedster-ai.scad"
OUTDIR="${1:-models}"

# Auto-detect OpenSCAD
if [ -z "$OPENSCAD" ]; then
    if command -v openscad &>/dev/null; then
        OPENSCAD="openscad"
    elif [ -x "/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD" ]; then
        OPENSCAD="/Applications/OpenSCAD.app/Contents/MacOS/OpenSCAD"
    else
        echo "Error: OpenSCAD not found. Install it or set OPENSCAD env var." >&2
        exit 1
    fi
fi

if [ ! -f "$SCAD" ]; then
    echo "Error: $SCAD not found. Run from project root." >&2
    exit 1
fi

mkdir -p "$OUTDIR"
TMPDIR=$(mktemp -d)
trap "rm -rf $TMPDIR" EXIT

SCAD_ABS="$(cd "$(dirname "$SCAD")" && pwd)/$(basename "$SCAD")"

echo "Exporting STLs to $OUTDIR/..."
echo ""

# Export front half
echo "Exporting front half..."
cat > "$TMPDIR/front.scad" << EOF
include <$SCAD_ABS>
front_half();
EOF
$OPENSCAD "$TMPDIR/front.scad" -D 'render_mode=99' -o "$OUTDIR/speedster-ai-front.stl" 2>&1 | grep -E 'Status|Genus|Vertices|Facets|Error'

# Export back half (rotated so flat back face is on build plate)
echo "Exporting back half..."
cat > "$TMPDIR/back.scad" << EOF
include <$SCAD_ABS>
rotate([180,0,0]) back_half();
EOF
$OPENSCAD "$TMPDIR/back.scad" -D 'render_mode=99' -o "$OUTDIR/speedster-ai-back.stl" 2>&1 | grep -E 'Status|Genus|Vertices|Facets|Error'

echo ""
echo "Done. STLs saved to $OUTDIR/"
ls -lh "$OUTDIR"/*.stl