Made a GeoPos widget for lon/lat/alt entry and display (APRS...)

Cleaned up the GeoMap view, can be used as input

firmware/application/main.cpp

@@ -24,19 +24,20 @@
 // Gimp image > indexed colors (16), then "xxd -i *.bmp"
 
 //TEST: ADS-B tx manchester encoder, velocity and squawk frames
-//TEST: Mic tx
 //TEST: Menuview refresh, seems to blink a lot
 //TEST: Check AFSK transmit end, skips last bits ?
 //TEST: Imperial in whipcalc
 
+//BUG: ADSB transmit baseband code works only if stuck in a loop (txdone message makes everything go nuts)
 //BUG: CPLD-related rx ok, tx bad, see portapack.cpp lines 214+ to disable CPLD overlay
 //BUG: REPLAY See what's wrong with quality (format, or need for interpolation filter ?)
-//TODO: REPLAY Convert C16 to C8 on M0 core
 //BUG: SCANNER Lock on frequency, if frequency jump, still locked on first one
 //BUG: SCANNER Multiple slices
 //BUG: REPLAY freezes when SD card not present
 //BUG: RDS doesn't stop baseband when stopping tx ?
 
+//TODO: REPLAY Convert C16 to C8 on M0 core
+//TODO: Use TabView
 //TODO: De bruijn sequence scanner for encoders
 //TODO: Make freqman refresh simpler (use previous black rectangle method)
 //TODO: Merge AFSK and TONES procs ?

firmware/application/ui_adsb_tx.cpp

@@ -22,7 +22,6 @@
 
 #include "ui_adsb_tx.hpp"
 #include "ui_alphanum.hpp"
-#include "ui_geomap.hpp"
 
 #include "manchester.hpp"
 #include "string_format.hpp"
@@ -43,10 +42,6 @@ Compass::Compass(
 {
 }
 
-Point Compass::polar_to_point(uint32_t angle, uint32_t distance) {
-	return Point(sin_f32(DEG_TO_RAD(angle) + (pi / 2)) * distance, -sin_f32(DEG_TO_RAD(angle)) * distance);
-}
-
 void Compass::set_value(uint32_t new_value) {
 	Point center = screen_pos() + Point(32, 32);
 	
@@ -103,40 +98,35 @@ ADSBPositionView::ADSBPositionView(NavigationView& nav) {
 	set_type("position");
 	
 	add_children({
-		&labels_position,
-		&field_altitude,
-		&field_lat_degrees,
-		&field_lat_minutes,
-		&field_lat_seconds,
-		&field_lon_degrees,
-		&field_lon_minutes,
-		&field_lon_seconds,
+		&geopos,
 		&button_set_map
 	});
 	
-	field_altitude.set_value(36000);
-	field_lat_degrees.set_value(0);
-	field_lat_minutes.set_value(0);
-	field_lat_seconds.set_value(0);
-	field_lon_degrees.set_value(0);
-	field_lon_minutes.set_value(0);
-	field_lon_seconds.set_value(0);
+	geopos.set_altitude(36000);
 	
 	button_set_map.on_select = [this, &nav](Button&) {
-		nav.push<GeoMapView>(GeoMapView::Mode::SET);
+		nav.push<GeoMapView>(
+			geopos.altitude(),
+			geopos.lat(),
+			geopos.lon(),
+			[this](int32_t altitude, float lat, float lon) {
+				geopos.set_altitude(altitude);
+				geopos.set_lat(lat);
+				geopos.set_lon(lon);
+			});
 	};
 }
 
 void ADSBPositionView::collect_frames(const uint32_t ICAO_address, std::vector<ADSBFrame>& frame_list) {
 	ADSBFrame temp_frame;
 	
-	encode_frame_pos(temp_frame, ICAO_address, field_altitude.value(),
-		field_lat_degrees.value(), field_lon_degrees.value(), 0);
+	encode_frame_pos(temp_frame, ICAO_address, geopos.altitude(),
+		geopos.lat(), geopos.lon(), 0);
 	
 	frame_list.emplace_back(temp_frame);
 	
-	encode_frame_pos(temp_frame, ICAO_address, field_altitude.value(),
-		field_lat_degrees.value(), field_lon_degrees.value(), 1);
+	encode_frame_pos(temp_frame, ICAO_address, geopos.altitude(),
+		geopos.lat(), geopos.lon(), 1);
 		
 	frame_list.emplace_back(temp_frame);
 }
@@ -223,11 +213,18 @@ ADSBTxView::~ADSBTxView() {
 void ADSBTxView::generate_frames() {
 	const uint32_t ICAO_address = sym_icao.value_hex_u64();
 	
+	/* This scheme kinda sucks. Each "tab"'s collect_frames method
+	 * is called to generate its related frame(s). Getting values
+	 * from each widget of each tab would be better ?
+	 * */
 	view_position.collect_frames(ICAO_address, frames);
 	view_callsign.collect_frames(ICAO_address, frames);
 	view_speed.collect_frames(ICAO_address, frames);
 	view_squawk.collect_frames(ICAO_address, frames);
 	
+	// DEBUG: Show how many frames were generated
+	text_frame.set(to_string_dec_uint(frames.size()) + " frame(s).");
+
 	//memset(bin_ptr, 0, 240);
 
 	//auto raw_ptr = frames[0].get_raw_data();
@@ -352,14 +349,11 @@ ADSBTxView::ADSBTxView(
 	view_speed.set_parent_rect(view_rect);
 	view_squawk.set_parent_rect(view_rect);
 	
-	sym_icao.on_change = [this]() {
-		generate_frames();
-	};
-	
 	tx_view.on_start = [this]() {
 		start_tx();
 		tx_view.set_transmitting(true);
-		rotate_frames();
+		// Disable for DEBUG
+		//rotate_frames();
 	};
 	
 	tx_view.on_stop = [this]() {

firmware/application/ui_adsb_tx.hpp

@@ -23,9 +23,9 @@
 #include "ui.hpp"
 #include "adsb.hpp"
 #include "utility.hpp"
-#include "sine_table.hpp"
 #include "ui_textentry.hpp"
 #include "ui_widget.hpp"
+#include "ui_geomap.hpp"
 #include "ui_tabview.hpp"
 #include "ui_navigation.hpp"
 #include "ui_transmitter.hpp"
@@ -47,8 +47,6 @@ public:
 	void paint(Painter&) override;
 
 private:
-	Point polar_to_point(uint32_t angle, uint32_t distance);
-	
 	const range_t<uint32_t> range { 0, 359 };
 	uint32_t value_ { 0 };
 };
@@ -83,38 +81,8 @@ public:
 	void collect_frames(const uint32_t ICAO_address, std::vector<ADSBFrame>& frame_list);
 
 private:
-	Labels labels_position {
-		{ { 2 * 8, 2 * 16 }, "Alt:       feet", Color::light_grey() },
-		{ { 2 * 8, 4 * 16 }, "Lat:     *  '  \"", Color::light_grey() },	// No ° symbol in 8x16 font
-		{ { 2 * 8, 5 * 16 }, "Lon:     *  '  \"", Color::light_grey() },
-	};
-	
-	NumberField field_altitude {
-		{ 7 * 8, 2 * 16 },
-		5,
-		{ -1000, 50000 },
-		250,
-		' '
-	};
-	
-	NumberField field_lat_degrees {
-		{ 7 * 8, 4 * 16 }, 4, { -90, 90 }, 1, ' '
-	};
-	NumberField field_lat_minutes {
-		{ 12 * 8, 4 * 16 }, 2, { 0, 59 }, 1, ' '
-	};
-	NumberField field_lat_seconds {
-		{ 15 * 8, 4 * 16 }, 2, { 0, 59 }, 1, ' '
-	};
-	
-	NumberField field_lon_degrees {
-		{ 7 * 8, 5 * 16 }, 4, { -180, 180 }, 1, ' '
-	};
-	NumberField field_lon_minutes {
-		{ 12 * 8, 5 * 16 }, 2, { 0, 59 }, 1, ' '
-	};
-	NumberField field_lon_seconds {
-		{ 15 * 8, 5 * 16 }, 2, { 0, 59 }, 1, ' '
+	GeoPos geopos {
+		{ 0, 2 * 16 }
 	};
 	
 	Button button_set_map {
@@ -194,13 +162,13 @@ public:
 	std::string title() const override { return "ADS-B transmit"; };
 
 private:
-	enum tx_modes {
+	/*enum tx_modes {
 		IDLE = 0,
 		SINGLE,
 		SEQUENCE
-	};
+	};*/
 	
-	const float plane_lats[12] = {
+	/*const float plane_lats[12] = {
 		0,
 		-1,
 		-2,
@@ -227,9 +195,9 @@ private:
 		-1,
 		-1,
 		-1
-	};
+	};*/
 	
-	tx_modes tx_mode = IDLE;
+	//tx_modes tx_mode = IDLE;
 	NavigationView& nav_;
 	std::vector<ADSBFrame> frames { };
 	

firmware/application/ui_geomap.cpp

@@ -23,8 +23,6 @@
 #include "ui_geomap.hpp"
 
 #include "adsb.hpp"
-//#include "string_format.hpp"
-#include "sine_table_int8.hpp"
 #include "portapack.hpp"
 
 #include <cstring>
@@ -34,9 +32,80 @@ using namespace portapack;
 
 namespace ui {
 
+GeoPos::GeoPos(
+	const Point pos
+) {
+	set_parent_rect({pos, {30 * 8, 3 * 16}});
+	
+	add_children({
+		&labels_position,
+		&field_altitude,
+		&field_lat_degrees,
+		&field_lat_minutes,
+		&field_lat_seconds,
+		&field_lon_degrees,
+		&field_lon_minutes,
+		&field_lon_seconds
+	});
+	
+	// Defaults
+	set_altitude(0);
+	set_lat(0);
+	set_lon(0);
+	
+	const auto changed = [this](int32_t) {
+		if (on_change)
+			on_change();
+	};
+	
+	field_altitude.on_change = changed;
+	field_lat_degrees.on_change = changed;
+	field_lat_minutes.on_change = changed;
+	field_lat_seconds.on_change = changed;
+	field_lon_degrees.on_change = changed;
+	field_lon_minutes.on_change = changed;
+	field_lon_seconds.on_change = changed;
+}
+
+void GeoPos::focus() {
+	field_altitude.focus();
+}
+
+void GeoPos::set_altitude(int32_t altitude) {
+	field_altitude.set_value(altitude);
+}
+
+void GeoPos::set_lat(float lat) {
+	field_lat_degrees.set_value(lat);
+	field_lat_minutes.set_value((uint32_t)(lat / (1.0 / 60)) % 60);
+	field_lat_seconds.set_value((uint32_t)(lat / (1.0 / 3600)) % 60);
+}
+
+void GeoPos::set_lon(float lon) {
+	field_lon_degrees.set_value(lon);
+	field_lon_minutes.set_value((uint32_t)(lon / (1.0 / 60)) % 60);
+	field_lon_seconds.set_value((uint32_t)(lon / (1.0 / 3600)) % 60);
+}
+
+float GeoPos::lat() {
+	return field_lat_degrees.value() + (field_lat_minutes.value() / 60.0) + (field_lat_seconds.value() / 3600.0);
+};
+
+float GeoPos::lon() {
+	return field_lon_degrees.value() + (field_lon_minutes.value() / 60.0) + (field_lon_seconds.value() / 3600.0);
+};
+
+int32_t GeoPos::altitude() {
+	return field_altitude.value();
+};
+
+void GeoPos::set_read_only(bool v) {
+	set_focusable(~v);
+};
+
 void GeoMapView::focus() {
 	if (!file_error) {
-		field_xpos.focus();
+		geopos.focus();
 		move_map();
 	} else
 		nav_.display_modal("No map", "No world_map.bin file in\n/ADSB/ directory", ABORT, nullptr);
@@ -46,61 +115,58 @@ GeoMapView::~GeoMapView() {
 	
 }
 
-Point GeoMapView::polar_to_point(const uint8_t angle, const uint32_t size) {
-	return { (Coord)(sine_table_i8[(angle + 64) & 0xFF] * size) >> 7, (Coord)(sine_table_i8[angle] * size) >> 7 };
-}
-
-void GeoMapView::draw_bearing(const Point origin, const uint8_t angle, uint32_t size, const Color color) {
+void GeoMapView::draw_bearing(const Point origin, const uint32_t angle, uint32_t size, const Color color) {
 	Point arrow_a, arrow_b, arrow_c;
 	
+	for (size_t thickness = 0; thickness < 3; thickness++) {
 		arrow_a = polar_to_point(angle, size) + origin;
-	arrow_b = polar_to_point(angle + 128 - 16, size) + origin;
-	arrow_c = polar_to_point(angle + 128 + 16, size) + origin;
+		arrow_b = polar_to_point(angle + 180 - 30, size) + origin;
+		arrow_c = polar_to_point(angle + 180 + 30, size) + origin;
+		
 		display.draw_line(arrow_a, arrow_b, color);
 		display.draw_line(arrow_b, arrow_c, color);
 		display.draw_line(arrow_c, arrow_a, color);
 		
 		size--;
-	arrow_a = polar_to_point(angle, size) + origin;
-	arrow_b = polar_to_point(angle + 128 - 16, size) + origin;
-	arrow_c = polar_to_point(angle + 128 + 16, size) + origin;
-	display.draw_line(arrow_a, arrow_b, color);
-	display.draw_line(arrow_b, arrow_c, color);
-	display.draw_line(arrow_c, arrow_a, color);
+	}
 }
 
 void GeoMapView::move_map() {
 	Coord line;
 	int32_t x_pos, y_pos;
-	std::array<ui::Color, 240> map_buffer;
+	std::array<ui::Color, 240> map_line_buffer;
+	
+	auto r = screen_rect();
+	Rect map_rect = { r.left(), r.top() + banner_height, r.width(), r.height() - banner_height };
+	
+	altitude_ = geopos.altitude();
+	lat_ = geopos.lat();
+	lon_ = geopos.lon();
 	
 	// Map is in Equidistant "Plate Carrée" projection
-	x_pos = map_center_x - 120 + ((((field_xpos.value() * map_center_x) << 8) / 180) >> 8);
-	y_pos = map_center_y - 144 + ((((field_ypos.value() * map_center_y) << 8) / 90) >> 8);
+	x_pos = map_center_x - (map_rect.width() / 2) + ((lat_ * map_center_x) / 180);
+	y_pos = map_center_y - (map_rect.height() / 2) + ((lon_ * map_center_y) / 90);
 	
-	if (x_pos > (map_width - 240))
-		x_pos = map_width - 240;
-	if (y_pos > (map_height + 288))
-		y_pos = map_height - 288;
+	if (x_pos > (map_width - map_rect.width()))
+		x_pos = map_width - map_rect.width();
+	if (y_pos > (map_height + map_rect.height()))
+		y_pos = map_height - map_rect.height();
 	
-	for (line = 0; line < 288; line++) {
+	for (line = 0; line < map_rect.height(); line++) {
 		map_file.seek(4 + ((x_pos + (map_width * (y_pos + line))) << 1));
-		map_file.read(map_buffer.data(), 240 * 2);
-		display.draw_pixels({ 0, 32 + line, 240, 1 }, map_buffer);
+		map_file.read(map_line_buffer.data(), map_rect.width() << 1);
+		display.draw_pixels({ 0, map_rect.top() + line, map_rect.width(), 1 }, map_line_buffer);
 	}
 	
-	draw_bearing({ 120, 32 + 144 }, field_angle.value(), 16, Color::red());
-	
-	//display.fill_rectangle({ 120-16, 176-1, 32, 2 }, Color::red());
-	//display.fill_rectangle({ 120-1, 176-16, 2, 32 }, Color::red());
+	if (mode_ == PROMPT) {
+		display.fill_rectangle({ map_rect.center() - Point(16, 1), { 32, 2 } }, Color::red());
+		display.fill_rectangle({ map_rect.center() - Point(1, 16), { 2, 32 } }, Color::red());
+	} else {
+		draw_bearing({ 120, 32 + 144 }, angle_, 16, Color::red());
+	}
 }
 
-GeoMapView::GeoMapView(
-	NavigationView& nav,
-	Mode mode
-) : nav_ (nav),
-	mode_ (mode)
-{
+void GeoMapView::setup() {
 	auto result = map_file.open("ADSB/world_map.bin");
 	if (result.is_valid()) {
 		file_error = true;
@@ -113,23 +179,59 @@ GeoMapView::GeoMapView(
 	map_center_x = map_width >> 1;
 	map_center_y = map_height >> 1;
 	
-	add_children({
-		&field_xpos,
-		&field_ypos
-	});
+	add_child(&geopos);
 	
-	if (mode_ == SHOW) {
-		add_child(&field_angle);
-		field_angle.on_change = [this](int32_t) {
+	geopos.set_altitude(altitude_);
+	geopos.set_lat(lat_);
+	geopos.set_lon(lon_);
+	
+	geopos.on_change = [this]() {
 		move_map();
 	};
 }
 
-	field_xpos.on_change = [this](int32_t) {
-		move_map();
-	};
-	field_ypos.on_change = [this](int32_t) {
-		move_map();
+// Display mode
+GeoMapView::GeoMapView(
+	NavigationView& nav,
+	std::string* tag,
+	int32_t altitude,
+	float lat,
+	float lon,
+	float angle
+) : nav_ (nav),
+	tag_ (tag),
+	altitude_ (altitude),
+	lat_ (lat),
+	lon_ (lon),
+	angle_ (angle)
+{
+	mode_ = DISPLAY;
+	setup();
+	
+	geopos.set_read_only(true);
+}
+
+// Prompt mode
+GeoMapView::GeoMapView(
+	NavigationView& nav,
+	int32_t altitude,
+	float lat,
+	float lon,
+	const std::function<void(int32_t, float, float)> on_done
+) : nav_ (nav),
+	altitude_ (altitude),
+	lat_ (lat),
+	lon_ (lon)
+{
+	mode_ = PROMPT;
+	setup();
+	
+	add_child(&button_ok);
+	
+	button_ok.on_select = [this, on_done, &nav](Button&) {
+		if (on_done)
+			on_done(altitude_, lat_, lon_);
+		nav.pop();
 	};
 }
 

firmware/application/ui_geomap.hpp

@@ -29,14 +29,70 @@
 
 namespace ui {
 
-class GeoMapView : public View {
+class GeoPos : public View {
 public:
-	enum Mode {
-		SHOW,
-		SET
+	std::function<void(void)> on_change { };
+	
+	GeoPos(const Point pos);
+	
+	void focus() override;
+	
+	void set_read_only(bool v);
+	void set_altitude(int32_t altitude);
+	void set_lat(float lat);
+	void set_lon(float lon);
+	float lat();
+	float lon();
+	int32_t altitude();
+
+private:
+	bool read_only { false };
+
+	Labels labels_position {
+		{ { 2 * 8, 0 * 16 }, "Alt:       feet", Color::light_grey() },
+		{ { 2 * 8, 1 * 16 }, "Lat:     *  '  \"", Color::light_grey() },	// No ° symbol in 8x16 font
+		{ { 2 * 8, 2 * 16 }, "Lon:     *  '  \"", Color::light_grey() },
 	};
 	
-	GeoMapView(NavigationView& nav, Mode mode);
+	NumberField field_altitude {
+		{ 7 * 8, 0 * 16 },
+		5,
+		{ -1000, 50000 },
+		250,
+		' '
+	};
+	
+	NumberField field_lat_degrees {
+		{ 7 * 8, 1 * 16 }, 4, { -90, 90 }, 1, ' '
+	};
+	NumberField field_lat_minutes {
+		{ 12 * 8, 1 * 16 }, 2, { 0, 59 }, 1, ' '
+	};
+	NumberField field_lat_seconds {
+		{ 15 * 8, 1 * 16 }, 2, { 0, 59 }, 1, ' '
+	};
+	
+	NumberField field_lon_degrees {
+		{ 7 * 8, 2 * 16 }, 4, { -180, 180 }, 1, ' '
+	};
+	NumberField field_lon_minutes {
+		{ 12 * 8, 2 * 16 }, 2, { 0, 59 }, 1, ' '
+	};
+	NumberField field_lon_seconds {
+		{ 15 * 8, 2 * 16 }, 2, { 0, 59 }, 1, ' '
+	};
+};
+
+class GeoMapView : public View {
+public:
+	GeoMapView(NavigationView& nav, std::string* tag, int32_t altitude, float lat, float lon, float angle);
+	GeoMapView(NavigationView& nav, int32_t altitude, float lat, float lon, const std::function<void(int32_t, float, float)> on_done);
+	
+	GeoMapView(const GeoMapView&) = delete;
+	GeoMapView(GeoMapView&&) = delete;
+	GeoMapView& operator=(const GeoMapView&) = delete;
+	GeoMapView& operator=(GeoMapView&&) = delete;
+	
 	~GeoMapView();
 	
 	void focus() override;
@@ -44,42 +100,37 @@ public:
 	std::string title() const override { return "Map view"; };
 
 private:
+	enum Mode {
+		DISPLAY,
+		PROMPT
+	};
+	
+	const Dim banner_height = 3 * 16;
 	NavigationView& nav_;
+	const std::function<void(int32_t, float, float)> on_done { };
 	Mode mode_ { };
+	std::string* tag_ { };
+	int32_t altitude_ { };
+	float lat_ { };
+	float lon_ { };
+	float angle_ { };
 	
 	File map_file { };
 	bool file_error { false };
 	uint16_t map_width { }, map_height { };
 	int32_t map_center_x { }, map_center_y { };
 	
+	void setup();
 	void move_map();
-	Point polar_to_point(const uint8_t angle, const uint32_t size);
-	void draw_bearing(const Point origin, const uint8_t angle, uint32_t size, const Color color);
+	void draw_bearing(const Point origin, const uint32_t angle, uint32_t size, const Color color);
 	
-	Labels labels {
-		{ { 0 * 8, 0 * 8 }, "Test", Color::light_grey() }
+	GeoPos geopos {
+		{ 0, 0 }
 	};
 	
-	NumberField field_xpos {
-		{ 0, 0 },
-		4,
-		{ -180, 180 },
-		1,
-		'0'
-	};
-	NumberField field_ypos {
-		{ 6 * 8, 0 },
-		4,
-		{ -90, 90 },
-		1,
-		'0'
-	};
-	NumberField field_angle {
-		{ 12 * 8, 0 },
-		3,
-		{ 0, 255 },
-		1,
-		'0'
+	Button button_ok {
+		{ 20 * 8, 8, 8 * 8, 2 * 16 },
+		"OK"
 	};
 };
 

firmware/application/ui_tabview.hpp

@@ -27,8 +27,6 @@
 #include "ui_widget.hpp"
 #include "ui_navigation.hpp"
 #include "ui_painter.hpp"
-#include "ui_receiver.hpp"
-#include "ui_font_fixed_8x16.hpp"
 
 namespace ui {
 	
@@ -53,8 +51,6 @@ private:
 
 class TabView : public View {
 public:
-	//std::function<void(void)> on_change { };
-	
 	struct TabDef {
 		std::string text;
 		ui::Color color;

firmware/common/adsb.cpp

@@ -161,7 +161,7 @@ int cpr_N(float lat, int is_odd) {
 // ... and ...
 // if (lon > 180) lon -= 360;
 
-void encode_frame_pos(ADSBFrame& frame, const uint32_t ICAO_address, const uint32_t altitude,
+void encode_frame_pos(ADSBFrame& frame, const uint32_t ICAO_address, const int32_t altitude,
 	const float latitude, const float longitude, const uint32_t time_parity) {
 	
 	uint32_t altitude_coded;

firmware/common/adsb.hpp

@@ -24,14 +24,13 @@
 #define __ADSB_H__
 
 #include "adsb_frame.hpp"
+#include "ui.hpp"
 
 #include <cstring>
 #include <string>
 
 namespace adsb {
 
-#define DEG_TO_RAD(d) (d * (2 * pi) / 360.0)
-
 enum downlink_format {
 	DF_ADSB = 17,
 	DF_EHS_SQUAWK = 21
@@ -70,7 +69,7 @@ const float adsb_lat_lut[58] = {
 
 void make_frame_adsb(ADSBFrame& frame, const uint32_t ICAO_address);
 void encode_frame_id(ADSBFrame& frame, const uint32_t ICAO_address, const std::string& callsign);
-void encode_frame_pos(ADSBFrame& frame, const uint32_t ICAO_address, const uint32_t altitude,
+void encode_frame_pos(ADSBFrame& frame, const uint32_t ICAO_address, const int32_t altitude,
 	const float latitude, const float longitude, const uint32_t time_parity);
 void encode_frame_velo(ADSBFrame& frame, const uint32_t ICAO_address, const uint32_t speed,
 	const float angle, const int32_t v_rate);

firmware/common/ui.cpp

@@ -20,6 +20,7 @@
  */
 
 #include "ui.hpp"
+#include "sine_table.hpp"
 
 #include <algorithm>
 
@@ -69,4 +70,8 @@ Rect& Rect::operator-=(const Point& p) {
 	return *this;
 }
 
+Point polar_to_point(float angle, uint32_t distance) {
+	return Point(sin_f32(DEG_TO_RAD(angle) + (pi / 2)) * distance, -sin_f32(DEG_TO_RAD(angle)) * distance);
+}
+
 } /* namespace ui */

firmware/common/ui.hpp

@@ -26,6 +26,8 @@
 
 namespace ui {
 
+#define DEG_TO_RAD(d) (d * (2 * pi) / 360.0)
+
 using Coord = int16_t;
 using Dim = int16_t;
 
@@ -326,6 +328,8 @@ struct TouchEvent {
 	Type type;
 };
 
+Point polar_to_point(float angle, uint32_t distance);
+
 } /* namespace ui */
 
 #endif/*__UI_H__*/