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329 | -------------------------------------------------------------------------------
-- --
-- Eagle Lander --
-- --
-- Copyright (C) 2015 Fabien Chouteau (chouteau@adacore.com) --
-- --
-- Eagle Lander 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. --
-- --
-- Eagle Lander 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 Eagle Lander. If not, see <http://www.gnu.org/licenses/>. --
-- --
-------------------------------------------------------------------------------
with Ada.Numerics;
with Pango.Enums; use Pango.Enums;
with Text_Utils; use Text_Utils;
package body Panels.Attitude is
type Rate_Panels is (Rate_Roll, Rate_Pitch, Rate_Yaw);
procedure Draw_Ball (Cr : Cairo_Context; Radius : Gdouble);
procedure Rate_Panel (Cr : Cairo_Context; Size : Gdouble;
Rate_Type : Rate_Panels);
procedure Round_Tick (Cr : Cairo_Context;
Number : Positive;
Size : Gdouble);
---------------
-- Draw_Ball --
---------------
procedure Draw_Ball (Cr : Cairo_Context; Radius : Gdouble) is
begin
Arc (Cr, 0.0, 0.0, Radius, 0.0, 2.0 * Ada.Numerics.Pi);
Clip (Cr);
Set_Source_Rgb (Cr, 0.9, 0.9, 0.9);
Arc (Cr, 0.0, 0.0, Radius, 0.0, 2.0 * Ada.Numerics.Pi);
Fill (Cr);
Set_Source_Rgb (Cr, 0.1, 0.1, 0.1);
Arc (Cr, 0.0, 0.0, Radius, 0.0, Ada.Numerics.Pi);
Fill (Cr);
Set_Line_Width (Cr, Radius * 0.05);
Set_Source_Rgba (Cr, 0.0, 0.0, 0.0, 0.3);
Arc (Cr, 0.0, 0.0, Radius * 0.98, 0.0, 2.0 * Ada.Numerics.Pi);
Stroke (Cr);
Set_Line_Width (Cr, Radius * 0.03);
Set_Dash (Cr, (Radius / 100.0, Radius / 10.0), 0.0);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Move_To (Cr, Radius * 0.3, -Radius);
Line_To (Cr, Radius * 0.3, 0.0);
Stroke (Cr);
Set_Source_Rgb (Cr, 1.0, 1.0, 1.0);
Move_To (Cr, Radius * 0.3, Radius);
Line_To (Cr, Radius * 0.3, 0.0);
Stroke (Cr);
Set_Line_Width (Cr, Radius * 0.03);
Set_Dash (Cr, (Radius / 100.0, Radius / 10.0), 0.0);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Move_To (Cr, -(Radius * 0.3), -Radius);
Line_To (Cr, -(Radius * 0.3), 0.0);
Move_To (Cr, -Radius, -(Radius * 0.3));
Line_To (Cr, Radius, -(Radius * 0.3));
Stroke (Cr);
Set_Source_Rgb (Cr, 1.0, 1.0, 1.0);
Move_To (Cr, -(Radius * 0.3), Radius);
Line_To (Cr, -(Radius * 0.3), 0.0);
Move_To (Cr, -Radius, Radius * 0.3);
Line_To (Cr, Radius, Radius * 0.3);
Stroke (Cr);
end Draw_Ball;
----------------
-- Rate_Panel --
----------------
procedure Rate_Panel (Cr : Cairo_Context; Size : Gdouble;
Rate_Type : Rate_Panels)
is
procedure Tick (Number : Positive; Width, Tick_Size : Gdouble);
----------
-- Tick --
----------
procedure Tick (Number : Positive; Width, Tick_Size : Gdouble) is
Width_T : constant Gdouble := Width / Gdouble ((Number - 1));
begin
for I in 0 .. Number - 1 loop
Move_To (Cr, Width_T * Gdouble (I), 0.0);
Line_To (Cr, Width_T * Gdouble (I), Tick_Size);
end loop;
Stroke (Cr);
end Tick;
begin
Save (Cr);
Set_Source_Rgb (Cr, 1.0, 1.0, 1.0);
Rectangle (Cr, 0.0, 0.0, Size, Size / 13.0);
Fill (Cr);
Translate (Cr, Size * 0.05, Size / 13.0 + Size * 0.01);
Tick (3, Size * 0.9, Size / 15.0);
Tick (11, Size * 0.9, Size / 30.0);
Tick (21, Size * 0.9, Size / 60.0);
Restore (Cr);
Set_Font_Size (Cr, Size / 15.0);
Move_To (Cr, Size / 2.0, Size / 4.5);
Draw_Centered_Text (Cr => Cr,
Text => (case Rate_Type is
when Rate_Roll => "ROLL RATE",
when Rate_Pitch => "PITCH RATE",
when Rate_Yaw => "YAW RATE"),
Pos => (Size / 2.0, -Size / 28.0),
Size => Size / 14.0,
Gravity => (case Rate_Type is
when Rate_Roll => Pango_Gravity_South,
when Rate_Pitch => Pango_Gravity_East,
when Rate_Yaw => Pango_Gravity_North));
end Rate_Panel;
----------------
-- Round_Tick --
----------------
procedure Round_Tick (Cr : Cairo_Context;
Number : Positive;
Size : Gdouble) is
Rotation : constant Gdouble := 2.0 * Ada.Numerics.Pi / Gdouble (Number);
begin
for I in 1 .. Number loop
Rotate (Cr, Rotation);
Move_To (Cr, 0.0, 0.0);
Line_To (Cr, Size, 0.0);
Stroke (Cr);
end loop;
end Round_Tick;
----------
-- Init --
----------
procedure Init (Self : in out Attitude_Indicator;
Pos : Vector2D;
Size : Gdouble) is
begin
Self.Pos := Pos;
Self.Size := (Size, Size);
end Init;
----------
-- Draw --
----------
procedure Draw (Self : in out Attitude_Indicator;
Cr : Cairo_Context;
Pitch : Angle;
Pitch_Rate : Angular_Velocity) is
Size : Gdouble;
Center_X : Gdouble;
Center_Y : Gdouble;
Radius : Gdouble;
Tick_Size : Gdouble;
Red_Zone : Gdouble;
Rate_Gauge_Size : Gdouble;
Cur_Pos : Gdouble;
A_Line : Vector2D;
begin
Self.Draw_Frame (Cr);
-- Real inner Size is only known after Draw_Frame()
Size := Self.Inner_Frame_Size.X;
Center_X := Size / 2.0;
Center_Y := Size / 2.0;
Radius := (Size / 2.0) * 0.6;
Tick_Size := Radius * 0.1;
Red_Zone := Ada.Numerics.Pi / 12.0;
Rate_Gauge_Size := Size / 2.0;
Cur_Pos :=
5.0 * Gdouble (Pitch_Rate) * (Rate_Gauge_Size * 0.9) / 2.0;
-- Check cursor limits
if Cur_Pos > 54.0 then
Cur_Pos := 54.0;
elsif Cur_Pos < -54.0 then
Cur_Pos := -54.0;
end if;
Save (Cr);
Translate (Cr, Self.Inner_Frame_Pos.X, Self.Inner_Frame_Pos.Y);
Scale (Cr, Self.Scale, Self.Scale);
-- Static background
-- Black background
Save (Cr);
Rectangle (Cr, 2.0, 2.0, Size - 4.0, Size - 4.0);
Clip (Cr);
Translate (Cr, Center_X, Center_Y);
A_Line := Rotate ((0.0, 135.0), Ada.Numerics.Pi / 8.0);
Move_To (Cr, A_Line.X, A_Line.Y);
for Index in 1 .. 8 loop
A_Line := Rotate (A_Line, Ada.Numerics.Pi / 4.0);
Line_To (Cr, A_Line.X, A_Line.Y);
end loop;
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Stroke_Preserve (Cr);
Fill (Cr);
Restore (Cr);
-- Red zone
Save (Cr);
Translate (Cr, Center_X, Center_Y);
Set_Source_Rgb (Cr, 1.0, 0.0, 0.0);
Line_To (Cr, 0.0, 0.0);
Arc (Cr, 0.0, 0.0, Radius + Tick_Size * 0.4, -Red_Zone, Red_Zone);
Close_Path (Cr);
Fill (Cr);
Line_To (Cr, 0.0, 0.0);
Arc (Cr, 0.0, 0.0, Radius + Tick_Size * 0.4,
Ada.Numerics.Pi - Red_Zone, Ada.Numerics.Pi + Red_Zone);
Close_Path (Cr);
Fill (Cr);
Restore (Cr);
-- Ticks
Set_Source_Rgb (Cr, 1.0, 1.0, 1.0);
Save (Cr);
Translate (Cr, Center_X, Center_Y);
Round_Tick (Cr, 4, Radius + Tick_Size);
Round_Tick (Cr, 12, Radius + Tick_Size * 0.8);
Round_Tick (Cr, 36, Radius + Tick_Size * 0.6);
Round_Tick (Cr, 72, Radius + Tick_Size * 0.4);
Restore (Cr);
-- Roll rate (top)
Save (Cr);
Translate (Cr, Center_X - Size / 4.0, Center_Y - Size / 2.2);
Rate_Panel (Cr, Rate_Gauge_Size, Rate_Roll);
Restore (Cr);
-- Pitch rate (right)
Save (Cr);
Translate (Cr, Center_X + Size / 2.2, Center_Y - Size / 4.0);
Rotate (Cr, Ada.Numerics.Pi / 2.0);
Rate_Panel (Cr, Rate_Gauge_Size, Rate_Pitch);
Restore (Cr);
-- Yaw rate (bottom)
Save (Cr);
Translate (Cr, Center_X + Size / 4.0, Center_Y + Size / 2.2);
Rotate (Cr, Ada.Numerics.Pi);
Rate_Panel (Cr, Rate_Gauge_Size, Rate_Yaw);
Restore (Cr);
-- End of static background
Save (Cr);
Translate (Cr, Center_X, Center_Y);
Rotate (Cr, Gdouble (Pitch));
Draw_Ball (Cr, Radius);
Restore (Cr);
-- center cross
Save (Cr);
Translate (Cr, Center_X, Center_Y);
Set_Line_Width (Cr, Radius * 0.01);
Set_Dash (Cr, (1.0, 0.0), 0.0);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Move_To (Cr, 0.0, -Radius);
Line_To (Cr, 0.0, Radius);
Stroke (Cr);
Move_To (Cr, -Radius, 0.0);
Line_To (Cr, Radius, 0.0);
Stroke (Cr);
Set_Line_Width (Cr, Radius * 0.02);
Set_Source_Rgb (Cr, 1.0, 0.75, 0.0);
Move_To (Cr, 0.0, -Radius / 2.5);
Line_To (Cr, 0.0, Radius / 2.5);
Stroke (Cr);
Move_To (Cr, -Radius / 2.5, 0.0);
Line_To (Cr, Radius / 2.5, 0.0);
Stroke (Cr);
Restore (Cr);
Save (Cr);
-- Roll rate (top)
Translate (Cr, Center_X - Size / 4.0, Center_Y - Size / 2.2);
Translate (Cr, Rate_Gauge_Size / 2.0, 0.0);
Move_To (Cr, -Rate_Gauge_Size / 30.0, 0.0);
Line_To (Cr, 0.0, Size / 30.0);
Line_To (Cr, Rate_Gauge_Size / 30.0, 0.0);
Close_Path (Cr);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Fill (Cr);
Restore (Cr);
-- Pitch rate (right)
Save (Cr);
Translate (Cr, Center_X + Size / 2.2, Center_Y - Size / 4.0);
Rotate (Cr, Ada.Numerics.Pi / 2.0);
Translate (Cr, Rate_Gauge_Size / 2.0, 0.0);
Move_To (Cr, -Rate_Gauge_Size / 30.0 - Cur_Pos, 0.0);
Line_To (Cr, -Cur_Pos, Size / 30.0);
Line_To (Cr, Rate_Gauge_Size / 30.0 - Cur_Pos, 0.0);
Close_Path (Cr);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Fill (Cr);
Restore (Cr);
-- Yaw rate (bottom)
Save (Cr);
Translate (Cr, Center_X + Size / 4.0, Center_Y + Size / 2.2);
Rotate (Cr, Ada.Numerics.Pi);
Translate (Cr, Rate_Gauge_Size / 2.0, 0.0);
Move_To (Cr, -Rate_Gauge_Size / 30.0, 0.0);
Line_To (Cr, 0.0, Size / 30.0);
Line_To (Cr, Rate_Gauge_Size / 30.0, 0.0);
Close_Path (Cr);
Set_Source_Rgb (Cr, 0.0, 0.0, 0.0);
Fill (Cr);
Restore (Cr);
Restore (Cr);
end Draw;
end Panels.Attitude;
|