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Fix NAN mesh entries with ABL_BILINEAR_SUBDIVISION (#20143)

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Jason Smith 2020-11-17 19:11:13 -08:00 committed by Scott Lahteine
parent 18869c666f
commit 7848096acb
1 changed files with 8 additions and 0 deletions
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8
Marlin/src/feature/bedlevel/abl/abl.cpp
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@ -161,6 +161,14 @@ void print_bilinear_leveling_grid() {
#define LINEAR_EXTRAPOLATION(E, I) ((E) * 2 - (I)) #define LINEAR_EXTRAPOLATION(E, I) ((E) * 2 - (I))
float bed_level_virt_coord(const uint8_t x, const uint8_t y) { float bed_level_virt_coord(const uint8_t x, const uint8_t y) {
uint8_t ep = 0, ip = 1; uint8_t ep = 0, ip = 1;
if (x > GRID_MAX_POINTS_X + 1 || y > GRID_MAX_POINTS_Y + 1) {
// The requested point requires extrapolating two points beyond the mesh.
// These values are only requested for the edges of the mesh, which are always an actual mesh point,
// and do not require interpolation. When interpolation is not needed, this "Mesh + 2" point is
// cancelled out in bed_level_virt_cmr and does not impact the result. Return 0.0 rather than
// making this function more complex by extrapolating two points.
return 0.0;
}
if (!x || x == ABL_TEMP_POINTS_X - 1) { if (!x || x == ABL_TEMP_POINTS_X - 1) {
if (x) { if (x) {
ep = GRID_MAX_POINTS_X - 1; ep = GRID_MAX_POINTS_X - 1;