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🩹 Constrain UBL within mesh bounds (MarlinFirmware#24631)
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mriscoc authored Aug 26, 2022
1 parent 2635182 commit c918e90
Showing 1 changed file with 6 additions and 4 deletions.
10 changes: 6 additions & 4 deletions Marlin/src/feature/bedlevel/ubl/ubl_motion.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -423,10 +423,12 @@
LIMIT(icell.x, 0, GRID_MAX_CELLS_X);
LIMIT(icell.y, 0, GRID_MAX_CELLS_Y);

float z_x0y0 = z_values[icell.x ][icell.y ], // z at lower left corner
z_x1y0 = z_values[icell.x+1][icell.y ], // z at upper left corner
z_x0y1 = z_values[icell.x ][icell.y+1], // z at lower right corner
z_x1y1 = z_values[icell.x+1][icell.y+1]; // z at upper right corner
const int8_t ncellx = _MIN(icell.x+1, GRID_MAX_CELLS_X),
ncelly = _MIN(icell.y+1, GRID_MAX_CELLS_Y);
float z_x0y0 = z_values[icell.x][icell.y], // z at lower left corner
z_x1y0 = z_values[ncellx ][icell.y], // z at upper left corner
z_x0y1 = z_values[icell.x][ncelly ], // z at lower right corner
z_x1y1 = z_values[ncellx ][ncelly ]; // z at upper right corner

if (isnan(z_x0y0)) z_x0y0 = 0; // ideally activating planner.leveling_active (G29 A)
if (isnan(z_x1y0)) z_x1y0 = 0; // should refuse if any invalid mesh points
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