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Save CPU by multiplying by pre-compiled values

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This commit is contained in:
Scott Lahteine 2016-08-06 23:24:07 -07:00
parent dce6026e0e
commit bad286d52f
1 changed files with 4 additions and 4 deletions
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8
Marlin/mesh_bed_leveling.h
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@ -58,22 +58,22 @@
} }
int8_t cell_index_x(float x) { int8_t cell_index_x(float x) {
int8_t cx = (x - (MESH_MIN_X)) / (MESH_X_DIST); int8_t cx = (x - (MESH_MIN_X)) * (1.0 / (MESH_X_DIST));
return constrain(cx, 0, (MESH_NUM_X_POINTS) - 2); return constrain(cx, 0, (MESH_NUM_X_POINTS) - 2);
} }
int8_t cell_index_y(float y) { int8_t cell_index_y(float y) {
int8_t cy = (y - (MESH_MIN_Y)) / (MESH_Y_DIST); int8_t cy = (y - (MESH_MIN_Y)) * (1.0 / (MESH_Y_DIST));
return constrain(cy, 0, (MESH_NUM_Y_POINTS) - 2); return constrain(cy, 0, (MESH_NUM_Y_POINTS) - 2);
} }
int8_t probe_index_x(float x) { int8_t probe_index_x(float x) {
int8_t px = (x - (MESH_MIN_X) + (MESH_X_DIST) * 0.5) / (MESH_X_DIST); int8_t px = (x - (MESH_MIN_X) + (MESH_X_DIST) * 0.5) * (1.0 / (MESH_X_DIST));
return (px >= 0 && px < (MESH_NUM_X_POINTS)) ? px : -1; return (px >= 0 && px < (MESH_NUM_X_POINTS)) ? px : -1;
} }
int8_t probe_index_y(float y) { int8_t probe_index_y(float y) {
int8_t py = (y - (MESH_MIN_Y) + (MESH_Y_DIST) * 0.5) / (MESH_Y_DIST); int8_t py = (y - (MESH_MIN_Y) + (MESH_Y_DIST) * 0.5) * (1.0 / (MESH_Y_DIST));
return (py >= 0 && py < (MESH_NUM_Y_POINTS)) ? py : -1; return (py >= 0 && py < (MESH_NUM_Y_POINTS)) ? py : -1;
} }