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- /*********************
- * bed_mesh_base.cpp *
- *********************/
-
- /****************************************************************************
- * Written By Marcio Teixeira 2020 *
- * *
- * 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. *
- * *
- * To view a copy of the GNU General Public License, go to the following *
- * location: <https://www.gnu.org/licenses/>. *
- ****************************************************************************/
-
- #include "../config.h"
- #include "screens.h"
-
- #ifdef FTDI_BED_MESH_BASE
-
- using namespace FTDI;
-
- void BedMeshBase::_drawMesh(CommandProcessor &cmd, int16_t x, int16_t y, int16_t w, int16_t h, uint8_t opts, float autoscale_max, uint8_t highlightedTag, mesh_getter_ptr func, void *data) {
- constexpr uint8_t rows = GRID_MAX_POINTS_Y;
- constexpr uint8_t cols = GRID_MAX_POINTS_X;
-
- #define VALUE(X,Y) (func ? func(X,Y,data) : 0)
- #define ISVAL(X,Y) (func ? !isnan(VALUE(X,Y)) : true)
- #define HEIGHT(X,Y) (ISVAL(X,Y) ? (VALUE(X,Y) - val_min) * scale_z : 0)
-
- // Compute the mean, min and max for the points
-
- float val_mean = 0;
- float val_max = -INFINITY;
- float val_min = INFINITY;
- uint8_t val_cnt = 0;
-
- if (opts & USE_AUTOSCALE) {
- for (uint8_t y = 0; y < rows; y++) {
- for (uint8_t x = 0; x < cols; x++) {
- if (ISVAL(x,y)) {
- const float val = VALUE(x,y);
- val_mean += val;
- val_max = max(val_max, val);
- val_min = min(val_min, val);
- val_cnt++;
- }
- }
- }
- }
- if (val_cnt)
- val_mean /= val_cnt;
- else {
- val_mean = 0;
- val_min = 0;
- val_max = 0;
- }
-
- const float scale_z = ((val_max == val_min) ? 1 : 1/(val_max - val_min)) * autoscale_max;
-
- /**
- * The 3D points go through a 3D graphics pipeline to determine the final 2D point on the screen.
- * This is written out as a stack of macros that each apply an affine transformation to the point.
- * At compile time, the compiler should be able to reduce these expressions.
- *
- * The last transformation in the chain (TRANSFORM_5) is initially set to a no-op so we can measure
- * the dimensions of the grid, but is later replaced with a scaling transform that scales the grid
- * to fit.
- */
-
- #define TRANSFORM_5(X,Y,Z) (X), (Y) // No transform
- #define TRANSFORM_4(X,Y,Z) TRANSFORM_5((X)/(Z),(Y)/-(Z), 0) // Perspective
- #define TRANSFORM_3(X,Y,Z) TRANSFORM_4((X), (Z), (Y)) // Swap Z and Y
- #define TRANSFORM_2(X,Y,Z) TRANSFORM_3((X), (Y) + 2.5, (Z) - 1) // Translate
- #define TRANSFORM(X,Y,Z) TRANSFORM_2(float(X)/(cols-1) - 0.5, float(Y)/(rows-1) - 0.5, (Z)) // Normalize
-
- // Compute the bounding box for the grid prior to scaling. Do this at compile-time by
- // transforming the four corner points via the transformation equations and finding
- // the min and max for each axis.
-
- constexpr float bounds[][3] = {{TRANSFORM(0 , 0 , 0)},
- {TRANSFORM(cols-1, 0 , 0)},
- {TRANSFORM(0 , rows-1, 0)},
- {TRANSFORM(cols-1, rows-1, 0)}};
- #define APPLY(FUNC, AXIS) FUNC(FUNC(bounds[0][AXIS], bounds[1][AXIS]), FUNC(bounds[2][AXIS], bounds[3][AXIS]))
- constexpr float grid_x = APPLY(min,0);
- constexpr float grid_y = APPLY(min,1);
- constexpr float grid_w = APPLY(max,0) - grid_x;
- constexpr float grid_h = APPLY(max,1) - grid_y;
- constexpr float grid_cx = grid_x + grid_w/2;
- constexpr float grid_cy = grid_y + grid_h/2;
-
- // Figure out scale and offset such that the grid fits within the rectangle given by (x,y,w,h)
-
- const float scale_x = float(w)/grid_w;
- const float scale_y = float(h)/grid_h;
- const float center_x = x + w/2;
- const float center_y = y + h/2;
-
- // Now replace the last transformation in the chain with a scaling operation.
-
- #undef TRANSFORM_5
- #define TRANSFORM_6(X,Y,Z) (X)*16, (Y)*16 // Scale to 1/16 pixel units
- #define TRANSFORM_5(X,Y,Z) TRANSFORM_6( center_x + ((X) - grid_cx) * scale_x, \
- center_y + ((Y) - grid_cy) * scale_y, 0) // Scale to bounds
-
- // Draw the grid
-
- const uint16_t basePointSize = min(w,h) / max(cols,rows);
-
- cmd.cmd(SAVE_CONTEXT())
- .cmd(TAG_MASK(false))
- .cmd(SAVE_CONTEXT());
-
- for (uint8_t y = 0; y < rows; y++) {
- for (uint8_t x = 0; x < cols; x++) {
- if (ISVAL(x,y)) {
- const bool hasLeftSegment = x < cols - 1 && ISVAL(x+1,y);
- const bool hasRightSegment = y < rows - 1 && ISVAL(x,y+1);
- if (hasLeftSegment || hasRightSegment) {
- cmd.cmd(BEGIN(LINE_STRIP));
- if (hasLeftSegment) cmd.cmd(VERTEX2F(TRANSFORM(x + 1, y , HEIGHT(x + 1, y ))));
- cmd.cmd( VERTEX2F(TRANSFORM(x , y , HEIGHT(x , y ))));
- if (hasRightSegment) cmd.cmd(VERTEX2F(TRANSFORM(x , y + 1, HEIGHT(x , y + 1))));
- }
- }
- }
-
- if (opts & USE_POINTS) {
- const float sq_min = sq(val_min - val_mean);
- const float sq_max = sq(val_max - val_mean);
- cmd.cmd(POINT_SIZE(basePointSize * 2));
- cmd.cmd(BEGIN(POINTS));
- for (uint8_t x = 0; x < cols; x++) {
- if (ISVAL(x,y)) {
- if (opts & USE_COLORS) {
- const float val_dev = sq(VALUE(x, y) - val_mean);
- uint8_t r = 0, b = 0;
- //*(VALUE(x, y) < 0 ? &r : &b) = val_dev / sq_min * 0xFF;
- if (VALUE(x, y) < 0)
- r = val_dev / sq_min * 0xFF;
- else
- b = val_dev / sq_max * 0xFF;
- cmd.cmd(COLOR_RGB(0xFF - b, 0xFF - b - r, 0xFF - r));
- }
- cmd.cmd(VERTEX2F(TRANSFORM(x, y, HEIGHT(x, y))));
- }
- }
- if (opts & USE_COLORS) {
- cmd.cmd(RESTORE_CONTEXT())
- .cmd(SAVE_CONTEXT());
- }
- }
- }
- cmd.cmd(RESTORE_CONTEXT())
- .cmd(TAG_MASK(true));
-
- if (opts & USE_TAGS) {
- cmd.cmd(COLOR_MASK(false, false, false, false))
- .cmd(POINT_SIZE(basePointSize * 10))
- .cmd(BEGIN(POINTS));
- for (uint8_t y = 0; y < rows; y++) {
- for (uint8_t x = 0; x < cols; x++) {
- const uint8_t tag = pointToTag(x, y);
- cmd.tag(tag).cmd(VERTEX2F(TRANSFORM(x, y, HEIGHT(x, y))));
- }
- }
- cmd.cmd(COLOR_MASK(true, true, true, true));
- }
-
- if (opts & USE_HIGHLIGHT) {
- const uint8_t tag = highlightedTag;
- xy_uint8_t pt;
- if (tagToPoint(tag, pt)) {
- cmd.cmd(COLOR_A(128))
- .cmd(POINT_SIZE(basePointSize * 6))
- .cmd(BEGIN(POINTS))
- .tag(tag).cmd(VERTEX2F(TRANSFORM(pt.x, pt.y, HEIGHT(pt.x, pt.y))));
- }
- }
- cmd.cmd(END());
- cmd.cmd(RESTORE_CONTEXT());
- }
-
- uint8_t BedMeshBase::pointToTag(uint8_t x, uint8_t y) {
- return x >= 0 && x < GRID_MAX_POINTS_X && y >= 0 && y < GRID_MAX_POINTS_Y ? y * (GRID_MAX_POINTS_X) + x + 10 : 0;
- }
-
- bool BedMeshBase::tagToPoint(uint8_t tag, xy_uint8_t &pt) {
- if (tag < 10) return false;
- pt.x = (tag - 10) % (GRID_MAX_POINTS_X);
- pt.y = (tag - 10) / (GRID_MAX_POINTS_X);
- return true;
- }
-
- void BedMeshBase::drawMeshBackground(CommandProcessor &cmd, int16_t x, int16_t y, int16_t w, int16_t h) {
- cmd.cmd(COLOR_RGB(Theme::bed_mesh_shadow_rgb));
- _drawMesh(cmd, x, y, w, h, USE_POINTS | USE_TAGS, 0.1, 0, nullptr, nullptr);
- }
-
- void BedMeshBase::drawMeshForeground(CommandProcessor &cmd, int16_t x, int16_t y, int16_t w, int16_t h, mesh_getter_ptr func, void *data, uint8_t highlightedTag, float progress) {
- constexpr float autoscale_max_amplitude = 0.03;
-
- cmd.cmd(COLOR_RGB(Theme::bed_mesh_lines_rgb));
- _drawMesh(cmd, x, y, w, h,
- USE_POINTS | USE_HIGHLIGHT | USE_AUTOSCALE | (progress > 0.95 ? USE_COLORS : 0),
- autoscale_max_amplitude * progress,
- highlightedTag,
- func, data
- );
- }
-
- #endif // FTDI_BED_MESH_BASE
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