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https://github.com/MarekZegare4/MeshCore-Solo.git
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Tools › Compass shows the device's course over ground (from the GPS COG ring — no magnetometer) as a rotating arrow in a ring with a north tick, plus a large degrees + cardinal readout. "No GPS fix" without a fix; "move to set heading" when stationary (course undefined). Reuses UITask::currentCourse, so it works without recording a trail. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
107 lines
3.5 KiB
C++
107 lines
3.5 KiB
C++
#pragma once
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// Tools › Compass. A standalone heading view: shows the device's course over
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// ground (derived from GPS movement — there is no magnetometer) as a rotating
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// arrow plus a numeric degrees + cardinal readout. When standing still the
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// heading is undefined, so it shows a hint to move.
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//
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// Reuses UITask's COG ring (currentCourse) — works whether or not a trail is
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// being recorded.
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#include "../GeoUtils.h"
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#include <math.h>
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class CompassScreen : public UIScreen {
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UITask* _task;
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static bool gpsValid() {
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#if ENV_INCLUDE_GPS == 1
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LocationProvider* loc = sensors.getLocationProvider();
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return loc && loc->isValid();
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#else
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return false;
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#endif
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}
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static void drawLine(DisplayDriver& d, int x0, int y0, int x1, int y1) {
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int dx = abs(x1 - x0), sx = x0 < x1 ? 1 : -1;
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int dy = -abs(y1 - y0), sy = y0 < y1 ? 1 : -1;
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int err = dx + dy;
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while (true) {
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d.fillRect(x0, y0, 1, 1);
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if (x0 == x1 && y0 == y1) break;
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int e2 = err * 2;
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if (e2 >= dy) { err += dy; x0 += sx; }
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if (e2 <= dx) { err += dx; y0 += sy; }
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}
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}
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public:
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CompassScreen(UITask* task) : _task(task) {}
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void enter() {}
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int render(DisplayDriver& display) override {
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display.setTextSize(1);
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display.setColor(DisplayDriver::LIGHT);
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display.drawTextCentered(display.width() / 2, 0, "COMPASS");
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display.fillRect(0, display.headerH() - 1, display.width(), display.sepH());
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const int hdr = display.headerH();
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const int cx = display.width() / 2;
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// Reserve a size-2 row at the bottom for the numeric readout.
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display.setTextSize(2);
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const int bigH = display.getLineHeight();
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display.setTextSize(1);
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const int top = hdr + 2;
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const int bottom = display.height() - bigH - 2;
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const int cy = (top + bottom) / 2;
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int r = ((bottom - top) / 2);
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int rx = (display.width() / 2) - 4;
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if (rx < r) r = rx;
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if (r < 6) r = 6;
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if (!gpsValid()) {
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display.drawTextCentered(cx, cy - display.getLineHeight() / 2, "No GPS fix");
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return 1000;
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}
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int cog;
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bool have = _task->currentCourse(cog);
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// Compass ring ticks: N/E/S/W as short marks; N drawn as a filled wedge top.
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display.drawRect(cx - r, cy - r, 2 * r + 1, 2 * r + 1); // bounding box stands in for a ring
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display.drawTextCentered(cx, cy - r - 1, "N");
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if (!have) {
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display.drawTextCentered(cx, cy - display.getLineHeight() / 2, "move to");
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display.drawTextCentered(cx, cy + display.getLineHeight() / 2, "set heading");
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return 1000;
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}
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// Arrow from centre toward the course (0° = up = north, clockwise).
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float rad = cog * (float)M_PI / 180.0f;
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int ex = cx + (int)(sinf(rad) * (r - 2));
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int ey = cy - (int)(cosf(rad) * (r - 2));
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drawLine(display, cx, cy, ex, ey);
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// Small arrowhead: two short lines back from the tip at ±150°.
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for (int da = -25; da <= 25; da += 50) {
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float a = rad + (float)M_PI + da * (float)M_PI / 180.0f;
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int hx = ex + (int)(sinf(a) * 4);
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int hy = ey - (int)(cosf(a) * 4);
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drawLine(display, ex, ey, hx, hy);
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}
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// Numeric readout below the ring.
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char buf[16];
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snprintf(buf, sizeof(buf), "%d %s", cog, geo::bearingCardinal(cog));
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display.setTextSize(2);
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display.drawTextCentered(cx, bottom + 1, buf);
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display.setTextSize(1);
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return 1000;
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}
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bool handleInput(char c) override {
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if (c == KEY_CANCEL || c == KEY_CONTEXT_MENU) { _task->gotoToolsScreen(); return true; }
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return true;
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}
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};
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