Firmware/Marlin/mesh_bed_leveling.h

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/**
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* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
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#include "Marlin.h"
#if ENABLED(MESH_BED_LEVELING)
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enum MBLStatus { MBL_STATUS_NONE = 0, MBL_STATUS_HAS_MESH_BIT = 0, MBL_STATUS_ACTIVE_BIT = 1 };
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#define MESH_X_DIST ((MESH_MAX_X - (MESH_MIN_X))/(MESH_NUM_X_POINTS - 1))
#define MESH_Y_DIST ((MESH_MAX_Y - (MESH_MIN_Y))/(MESH_NUM_Y_POINTS - 1))
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class mesh_bed_leveling {
public:
uint8_t status; // Has Mesh and Is Active bits
float z_offset;
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float z_values[MESH_NUM_Y_POINTS][MESH_NUM_X_POINTS];
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mesh_bed_leveling();
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void reset();
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static FORCE_INLINE float get_probe_x(int8_t i) { return MESH_MIN_X + (MESH_X_DIST) * i; }
static FORCE_INLINE float get_probe_y(int8_t i) { return MESH_MIN_Y + (MESH_Y_DIST) * i; }
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void set_z(const int8_t px, const int8_t py, const float z) { z_values[py][px] = z; }
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bool active() { return TEST(status, MBL_STATUS_ACTIVE_BIT); }
void set_active(bool onOff) { if (onOff) SBI(status, MBL_STATUS_ACTIVE_BIT); else CBI(status, MBL_STATUS_ACTIVE_BIT); }
bool has_mesh() { return TEST(status, MBL_STATUS_HAS_MESH_BIT); }
void set_has_mesh(bool onOff) { if (onOff) SBI(status, MBL_STATUS_HAS_MESH_BIT); else CBI(status, MBL_STATUS_HAS_MESH_BIT); }
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inline void zigzag(int8_t index, int8_t &px, int8_t &py) {
px = index % (MESH_NUM_X_POINTS);
py = index / (MESH_NUM_X_POINTS);
if (py & 1) px = (MESH_NUM_X_POINTS - 1) - px; // Zig zag
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}
void set_zigzag_z(int8_t index, float z) {
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int8_t px, py;
zigzag(index, px, py);
set_z(px, py, z);
}
int8_t cel_index_x(float x) {
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int8_t cx = int(x - (MESH_MIN_X)) / (MESH_X_DIST);
return constrain(cx, 0, (MESH_NUM_X_POINTS) - 2);
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}
int8_t cel_index_y(float y) {
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int8_t cy = int(y - (MESH_MIN_Y)) / (MESH_Y_DIST);
return constrain(cy, 0, (MESH_NUM_Y_POINTS) - 2);
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}
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int8_t probe_index_x(float x) {
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int8_t px = int(x - (MESH_MIN_X) + (MESH_X_DIST) / 2) / (MESH_X_DIST);
return (px >= 0 && px < (MESH_NUM_X_POINTS)) ? px : -1;
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}
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int8_t probe_index_y(float y) {
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int8_t py = int(y - (MESH_MIN_Y) + (MESH_Y_DIST) / 2) / (MESH_Y_DIST);
return (py >= 0 && py < (MESH_NUM_Y_POINTS)) ? py : -1;
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}
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float calc_z0(float a0, float a1, float z1, float a2, float z2) {
float delta_z = (z2 - z1) / (a2 - a1);
float delta_a = a0 - a1;
return z1 + delta_a * delta_z;
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}
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float get_z(float x0, float y0) {
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int8_t cx = cel_index_x(x0),
cy = cel_index_y(y0);
if (cx < 0 || cy < 0) return z_offset;
float z1 = calc_z0(x0,
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get_probe_x(cx), z_values[cy][cx],
get_probe_x(cx + 1), z_values[cy][cx + 1]);
float z2 = calc_z0(x0,
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get_probe_x(cx), z_values[cy + 1][cx],
get_probe_x(cx + 1), z_values[cy + 1][cx + 1]);
float z0 = calc_z0(y0,
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get_probe_y(cy), z1,
get_probe_y(cy + 1), z2);
return z0 + z_offset;
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}
};
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extern mesh_bed_leveling mbl;
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#endif // MESH_BED_LEVELING