Complete XYZAC LinuxCNC WASM parity and smooth 3D preview

run-gmoccapy.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+LINUXCNC_ROOT="${REPO_ROOT}/linuxcnc"
+CASE_DIR="${LINUXCNC_ROOT}/configs/sim/gmoccapy"
+CASE_NAME="${1:-gmoccapy.ini}"
+
+if [[ "${CASE_NAME}" == */* || "${CASE_NAME}" != *.ini ]]; then
+  printf 'case must be an .ini filename in %s\n' "${CASE_DIR}" >&2
+  exit 2
+fi
+
+CASE_INI="${CASE_DIR}/${CASE_NAME}"
+if [[ ! -f "${CASE_INI}" ]]; then
+  printf 'gmoccapy configuration not found: %s\n' "${CASE_INI}" >&2
+  exit 1
+fi
+if [[ ! -x /usr/bin/linuxcnc ]]; then
+  printf 'LinuxCNC launcher not found: /usr/bin/linuxcnc\n' >&2
+  exit 1
+fi
+
+cd "${LINUXCNC_ROOT}"
+exec /usr/bin/linuxcnc -r "${CASE_INI}"