Validate LinuxCNC tool length offsets

core/src/linuxcnc_tooldata_fixture.cpp

@@ -20,6 +20,7 @@ void cnc_sim_init_minimal_linuxcnc_tooldata() {
     tool.toolno = 1;
     tool.pocketno = 1;
     tool.diameter = 6.0;
+    tool.offset.tran.z = 12.5;
     tooldata_put(tool, 1);
     tooldata_last_index_set(1);
 }

core/tests/cnc_sim_api_linuxcnc_rs274_smoke.cpp

@@ -346,7 +346,7 @@ int main() {
                           (event.type == CNC_SIM_EVENT_COMMENT &&
                            event.line == 2 &&
                            event.reserved == 430 &&
-                           event.start.z == 0.0);
+                           near(event.start.z, 12.5));
         saw_tool_length_clear = saw_tool_length_clear ||
                                 (event.type == CNC_SIM_EVENT_COMMENT &&
                                  event.line == 3 &&

docs/linuxcnc-porting.md

@@ -188,6 +188,7 @@ This matrix tracks LinuxCNC feature coverage for the web/WASM simulator. A featu
 | --- | --- | --- |
 | Basic modal motion `G0/G1/G2/G3` | covered | `tests/gcode/linuxcnc_basic_motion.ngc`, `tests/gcode/basic_mill.ngc` |
 | Tool select/change `T... M6` | covered with minimal native tooldata | `tests/gcode/basic_mill.ngc` |
+| Tool length offset `G43/G49` | covered with nonzero tool-table offset through LinuxCNC native/source backends | `tests/gcode/linuxcnc_tool_length.ngc` |
 | RTCP controls `G43.4/G43.5/G49` | covered as simulator-owned control lines | `tests/gcode/linuxcnc_rtcp_controls.ngc` |
 | Kinematics switch `M428/M429/M430` | covered as simulator-owned control lines | `tests/gcode/linuxcnc_rtcp_controls.ngc` |
 | Canned cycle `G81/G80` | covered for drilling expand-to-canon path | `tests/gcode/linuxcnc_canned_cycle.ngc` |

test-linuxcnc-rs274-native.sh

@@ -157,7 +157,7 @@ if not any(
     event["type"] == "comment" and
     event["line"] == 2 and
     event["reserved"] == 430 and
-    event["start"]["z"] == 0
+    event["start"]["z"] == 12.5
     for event in tool_length
 ):
     raise SystemExit("missing G43 H1 tool length offset event")

test-linuxcnc-source-link.sh

@@ -101,6 +101,9 @@ CNC_SIM_RS274_VAR="$var_file" \
 CNC_SIM_RS274_VAR="$var_file" \
     "$build_dir/linuxcnc_rs274_source_dump" tests/gcode/linuxcnc_rtcp_controls.ngc \
     >/tmp/cnc_sim_linuxcnc_source_rtcp_controls.json
+CNC_SIM_RS274_VAR="$var_file" \
+    "$build_dir/linuxcnc_rs274_source_dump" tests/gcode/linuxcnc_tool_length.ngc \
+    >/tmp/cnc_sim_linuxcnc_source_tool_length.json
 CNC_SIM_RS274_VAR="$var_file" \
     "$build_dir/linuxcnc_rs274_source_dump" tests/gcode/linuxcnc_canned_cycle.ngc \
     >/tmp/cnc_sim_linuxcnc_source_canned_cycle.json
@@ -147,6 +150,24 @@ rtcp = [event for event in controls if event["type"] == "rtcp-state"]
 if [(event["line"], event["tool"], event["feed"]) for event in rtcp] != [(3, 0, 0), (4, 7, 1)]:
     raise SystemExit("unexpected source-linked RTCP state sequence")
 
+tool_length = json.loads(Path("/tmp/cnc_sim_linuxcnc_source_tool_length.json").read_text())
+if not any(
+    event["type"] == "comment" and
+    event["line"] == 2 and
+    event["reserved"] == 430 and
+    event["start"]["z"] == 12.5
+    for event in tool_length
+):
+    raise SystemExit("missing source-linked G43 H1 tool length offset event")
+if not any(
+    event["type"] == "comment" and
+    event["line"] == 3 and
+    event["reserved"] == 430 and
+    event["start"]["z"] == 0
+    for event in tool_length
+):
+    raise SystemExit("missing source-linked G49 tool length clear event")
+
 cycle = json.loads(Path("/tmp/cnc_sim_linuxcnc_source_canned_cycle.json").read_text())
 motions = [event for event in cycle if event["type"] in {"rapid", "linear-feed"}]
 expected_cycle = [
@@ -249,6 +270,7 @@ PY
 echo "linuxcnc rs274 source link smoke passed (${#objects[@]} local objects)"
 echo "dumped /tmp/cnc_sim_linuxcnc_source_basic_mill.json"
 echo "dumped /tmp/cnc_sim_linuxcnc_source_rtcp_controls.json"
+echo "dumped /tmp/cnc_sim_linuxcnc_source_tool_length.json"
 echo "dumped /tmp/cnc_sim_linuxcnc_source_canned_cycle.json"
 echo "dumped /tmp/cnc_sim_linuxcnc_source_canned_cycles_extended.json"
 echo "dumped /tmp/cnc_sim_linuxcnc_source_cutter_comp.json"