xhads/source/core.adb

with core;

use core;

package body core is

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	procedure configure is
	begin
		engine_configure;
		--
		hexagon_grid_sprite := load_sprite ("./sprite/ui/hexagon_grid_tile.png", 1, 1);
		hexagon_fill_sprite := load_sprite ("./sprite/ui/hexagon_fill_tile.png", 1, 1);
	end configure;

                                             ------------------------------------------------------------------------------------------

	procedure synchronize is
	begin
		global_time := global_time + 1;
		--
		global_time    := global_time mod (gameplay_framerate * animation_framerate);
		gameplay_time  := global_time mod (gameplay_framerate);
		animation_time := global_time /   (gameplay_framerate / animation_framerate);
		--
		engine_synchronize;
	end synchronize;

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	procedure draw_state_box (x, y : in integer) is
	begin
		write ("Cursor X       :" & integer'image (cursor_x),                          x, y +   0, 16#CCCCCC#);
		write ("Cursor Y       :" & integer'image (cursor_y),                          x, y +  32, 16#CCCCCC#);
		write ("Cursor Mode    :" & integer'image (cursor_mode),                       x, y +  64, 16#CCCCCC#);
		write ("Signal Code    :" & signal_code'image (signal_code'val (signal_mode)), x, y +  96, 16#CCCCCC#);
		write ("Camera X       :" & integer'image (camera.x),                          x, y + 128, 16#CCCCCC#);
		write ("Camera Y       :" & integer'image (camera.y),                          x, y + 160, 16#CCCCCC#);
		write ("Global Time    :" & integer'image (global_time),                       x, y + 192, 16#CCCCCC#);
		write ("Gameplay Time  :" & integer'image (gameplay_time),                     x, y + 224, 16#CCCCCC#);
		write ("Animation Time :" & integer'image (animation_time),                    x, y + 256, 16#CCCCCC#);
		write ("Framerate      :" & integer'image (framerate),                         x, y + 288, 16#CCCCCC#);
	end draw_state_box;

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	function flip_coin return integer is
	begin
		return (random_integer (0, 1));
	end flip_coin;

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	function roll_dice return integer is
	begin
		return (random_integer (1, 6));
	end roll_dice;

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	function by_chance (chance : in integer) return integer is
	begin
		return (random_integer (0, 100) mod chance);
	end by_chance;

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	function sigmoid (value : in boolean) return integer is
	begin
		return (if value then -1 else 1);
	end sigmoid;

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	function c_string (ada_string : string) return string is
	begin
		return (ada_string & character'val (0));
	end c_string;

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	function clip (value, minimum, maximum : in integer) return integer is
	begin
		if     value < minimum then return minimum; end if;
		if     value > maximum then return maximum; end if;
		return value;
	end clip;

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	function load_sprite (file_path : in string; frames, states : in integer) return sprite is
		this : sprite;
	begin
		this.index  := import_sprite (c_string (file_path));
		this.width  := sprite_width  (this.index) / states;
		this.height := sprite_height (this.index) / frames;
		this.frames := frames;
		this.states := states;
		--
		return this;
	end load_sprite;

                                             ------------------------------------------------------------------------------------------

	procedure crop (data : in sprite; x, y, u, v, width, height : in integer) is
	begin
		render_sprite (data.index, x, y, u, v, width, height);
	end crop;

                                             ------------------------------------------------------------------------------------------

	procedure view (data : in sprite; x, y, u, v, width, height : in integer) is
		crop_u, crop_v, crop_width, crop_height : integer;
	begin
		if x > u + width
		or y > v + height
		or x < u - data.width
		or y < v - data.height then
			return;
		end if;
		--
		--~if x < u + width  - data.width  then crop_width  := data.width;  else crop_width  := data.width  - (x + data.width)  mod (width + u);  end if;
		--~if x < u + width  - data.width  then crop_width  := data.width;  else crop_width  := data.width  - (x + data.width)  mod (width + u);  end if;
		crop_width  := data.width  - (if x < u + width  - data.width  then 0 else (x + data.width)  mod (width  + u));
		crop_height := data.height - (if y < v + height - data.height then 0 else (y + data.height) mod (height + v));
		crop_u      := 0;
		crop_v      := 0;
		--~if y + data.height < v + height then crop_height := (if y + data.height < height then data.height else data.height - (y + data.height) mod height); end if;
		--~if x + data.width  > u          then crop_u      :=               (x + data.width)  mod u;      end if;
		--~if y + data.height > v          then crop_v      :=               (y + data.height) mod v;      end if;
		--
		render_sprite (data.index, x, y, crop_u, crop_v, crop_width, crop_height);
	end view;

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	procedure draw (data : in sprite; x, y : in integer) is
	begin
		render_sprite (data.index, x, y, 0, 0, data.width, data.height);
	end draw;

                                             ------------------------------------------------------------------------------------------

	procedure move (data : in sprite; x, y, frame, state : in integer) is
	begin
		render_sprite (data.index, x, y, state * data.width, (animation_time mod frame) * data.height, data.width, data.height);
	end move;

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	procedure line (origin, offset : in vector_2) is
	begin
		render_vector (origin.x, origin.y, origin.x + offset.x, origin.y + offset.y);
	end line;

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	procedure write (text : in string; x, y : in integer; colour : in integer := 16#CCCCCC#) is
	begin
		render_string (c_string (text), x, y, colour, false);
	end write;

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	procedure debug (text : in string) is
	begin
		put_line ("> " & text);
	end debug;

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	procedure hexagonal_grid (x, y, width, height : in integer; fill : in boolean) is
		crop_width  : constant integer := width  mod hexagon_grid_sprite.width;
		crop_height : constant integer := height mod hexagon_grid_sprite.height;
		use_sprite  : constant sprite  := (if fill then hexagon_fill_sprite else hexagon_grid_sprite);
	begin
		for move_y in 0 .. height / hexagon_grid_sprite.height - 1
		loop
			for move_x in 0 .. width / hexagon_grid_sprite.width - 1
			loop
				draw (use_sprite, x + move_x * hexagon_grid_sprite.width, y + move_y * hexagon_grid_sprite.height);
			end loop;
			--
			crop (use_sprite, x + width - crop_width, y + move_y * hexagon_grid_sprite.height, 0, 0, crop_width, hexagon_grid_sprite.height);
		end loop;
		--
		for move_x in 0 .. width / hexagon_grid_sprite.width - 1
		loop
			crop (use_sprite, x + move_x * hexagon_grid_sprite.width, y + height - crop_height, 0, 0, hexagon_grid_sprite.width, crop_height);
		end loop;
		--
		crop (use_sprite, x + width - crop_width, y + height - crop_height, 0, 0, crop_width, crop_height);
	end hexagonal_grid;

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	function lowercase (text : in string) return string is
		result : string (1 .. text'length);
	begin
		for index in text'range
		loop
			if text (index) in 'A' .. 'Z' then
				result (index) := character'val (character'pos (text (index)) + 32);
			else
				result (index) := text (index);
			end if;
		end loop;
		--
		return result;
	end lowercase;

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	function uppercase (text : in string) return string is
		result : string (1 .. text'length);
	begin
		for index in text'range
		loop
			if text (index) in 'a' .. 'z' then
				result (index) := character'val (character'pos (text (index)) - 32);
			else
				result (index) := text (index);
			end if;
		end loop;
		--
		return result;
	end uppercase;

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	procedure draw_central_grid (x, y, width, height : in integer) is
	begin
		render_vector (width / 2 + x,              y, width / 2 + x, height     + y);
		render_vector (            x, height / 2 + y, width     + x, height / 2 + y);
	end draw_central_grid;

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	procedure draw_squared_grid (x, y, width, height : in integer) is
		offset_x    : constant integer := x + base / 2 + (width  mod base) / 2;
		offset_y    : constant integer := y + base / 2 + (height mod base) / 2;
		crop_height : constant integer := ((height + base) / 2) mod base;
		crop_offset : constant integer := y - ((y + height) mod base) / 2;
	begin
		for vertical in 0 .. width / base - 1
		loop
			line ((offset_x + vertical * base, y), (0, crop_height));
		end loop;
		--
		for horizontal in 0 .. height / base - 1
		loop
			line ((x, offset_y + horizontal * base), (width, 0));
			--
			for vertical in 0 .. width / base - 1
			loop
				line ((offset_x + vertical * base - base / 2, crop_offset + 2 * base * (horizontal / 2) + base), (0, base));
				line ((offset_x + vertical * base,            crop_offset + 2 * base * (horizontal / 2)),        (0, base));
			end loop;
		end loop;
		--
		for vertical in 0 .. width / base - 1
		loop
			line ((offset_x + vertical * base, crop_offset + 2 * base * ((height / base) / 2)), (0, crop_height));
		end loop;
	end draw_squared_grid;

                                             ------------------------------------------------------------------------------------------

	procedure draw_hexagon_grid (x, y, width, height : in integer) is
	begin
		render_vector (width / 2 + x,              y, width / 2 + x, height     + y);
		render_vector (            x, height / 2 + y, width     + x, height / 2 + y);
	end draw_hexagon_grid;

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end core;