#!/bin/bash

test_variants.sh - Test different parameter variations of SCAD files

Generates multiple versions of a design with different parameters

Useful for testing parametric designs and export optimization

Configuration

SCAD_FILE=“${1:-./*.scad}” OUTPUT_DIR=“${2:-./_variants}” OPENSCAD_CMD=“openscad” TEST_COUNT=0

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VARIANT CONFIGURATIONS

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Define parameter variations to test

Format: “name:parameter1=value1,parameter2=value2”

declare -a VARIANTS=( “small:size=10,thickness=1” “medium:size=20,thickness=2” “large:size=30,thickness=3” “extra_large:size=40,thickness=4” “high_detail:fn=50,thickness=2” “low_detail:fn=16,thickness=2” “hollow:hollow=true,wall_thickness=2” “solid:hollow=false,wall_thickness=3” )

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FUNCTIONS

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setup() { mkdir -p “$OUTPUT_DIR” echo “Output directory: $OUTPUT_DIR” echo “” }

test_variant() { local name=“$1” local params=“$2” local scad_file=“$3” local output_file=“${OUTPUT_DIR}/${name}.stl”

echo -n "Testing variant '$name' ... "

# Build parameter string for OpenSCAD
local param_string=""
IFS=',' read -ra PARAMS <<< "$params"
for param in "${PARAMS[@]}"; do
    param_string="$param_string -D $param"
done

if $OPENSCAD_CMD $param_string -o "$output_file" "$scad_file" 2>/dev/null; then
    local size=$(du -h "$output_file" | cut -f1)
    echo "✓ ($size)"
    TEST_COUNT=$((TEST_COUNT + 1))
    return 0
else
    echo "✗ Failed"
    return 1
fi

}

run_tests() { echo “Testing ${#VARIANTS[@]} variants of: $1” echo “==========================================” echo “”

for variant in "${VARIANTS[@]}"; do
    IFS=':' read -r name params <<< "$variant"
    test_variant "$name" "$params" "$1"
done

}

summary() { echo “” echo “==========================================” echo “Test Summary: $TEST_COUNT variants created” echo “View results in: $OUTPUT_DIR” echo “” echo “Next steps:” echo “ 1. Load STL files in your slicer“ echo “ 2. Compare print times and file sizes“ echo “ 3. Identify optimal parameters“ echo “ 4. Use best variant for production“ }

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MAIN

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setup

Find SCAD file if using wildcard

if [[ $SCAD_FILE == “”* ]]; then SCAD_FILE=$(ls -1 ${SCAD_FILE} 2>/dev/null | head -n1) if [ -z “$SCAD_FILE” ]; then echo “No SCAD files found!” exit 1 fi fi

run_tests “$SCAD_FILE” summary

exit 0