325 lines
13 KiB
JavaScript
325 lines
13 KiB
JavaScript
function initialize_a_star( dom_container, level_index ) {
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// kinda enums
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var cell = { WALL: '#', BALL: '@', CUBE: 'H', EMPTY: ' ', GIFT: 'x' };
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var direction = { UP: 38, DOWN: 40, LEFT: 37, RIGHT: 39 };
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var assets = {
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sprites: load_sprites( "HP48" ),
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levels: [ "#################@## x#H## x #### ##x ## ## x #### x x x ## x x## x ## ##x x#################",
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" # # # # # ### x @# #x #x x # # x x # # # x # # #H# x # # # # #xx## # # # # ",
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"################# x#@## ## ##H## #x x ## x x## x## #x x x# x### ##x #x x x####x ##x #################",
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"################# #H## # ###x#x x#x#x#x#x## # #x x# # # ####x#x#x x#x#x#x## # ## # #@ #################",
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" ############## #@ # # # ## #x # x x # ### # # ##x #x# #### # x # ##x# # # # #H## # x# #x# ############## ",
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" ############ # x #x x# # x # ## # x ##@ x ### x # ### x # ##H # x ##x #################",
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"################# # ## ### #x ##x# #x #x # # # # # # ### ## ## # #x# #x# # ## @#x H #x#################",
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"############### # x## ### #x ## x ## x## # #x ### ## #x# ### # x#x ##xHx# x #@# ### # ###############",
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" # ########### #x#x # @##x x# x # # # x## x# ## #x #xHx x## x## # #x#x # # # ############ ",
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" ########### #### x ## H ###x x# x## x #x #x # # # x # x##x#x # x# #@# #x ### ### # # # # ######### # #",
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"################# # @## #xx xx #### x ## x##x #x#xx ##### ## ## ##x x# x H x###x### # ## ## ########### ",
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"## ## #### #@#####x ### x### xx x ## ## ##x #x# ## # x ###x ## ## ## ## #H# ## x ## x #################",
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" ############## # @# x ### # #x x## ## x # ## x #x## # x ### x x #x##H # x # # # ############## ",
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"#################x#x x#x## x#@ ## ## H x ## x# ## x ## x# # ##x#x x#x#################",
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" ###### ####### # x# x ## # x # # x ## @# #xx #x # # # # x H# ##x # #x # # x # #x x# ############## ",
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"################## H#x x x##x @x#x #### ### x #### x#x# ##xx x#x ### x ####x ###x# # #################",
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"################# x# #@ ## # x#xx#x # ## #x##x# x ## x# x# ## x#x x# ## # # ##x# # ## x #x H #################",
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"################# x x H# ## #x#x #x ## #x# #x ## x # x#x ## #x# # x# ## x#x # x # ##x#@ # # #################",
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"#################x ## ##x## # # #x ## x# x## x ## # #x ## # x# ## ## x# ##x #H## x# #x ##@#################",
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"################# x#x ###x x# ##x ### # # x # # ## H # ## # @x## # # x # # ### x## #x x### x#x #################",
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"################# ### x ### # # ### ##x x ## x x x ### # ###x ## x x @ H x xx################# ",
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"#################x# #x# #x # ## # ##x # #x x ### #x x #### x # ###x ## #@#H x ################# ",
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" ############## # # #x# #x # ## x # ### # x #x ## #x # xx x ###x # ## x ## #@#H x # ############## ",
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"################# # ### ##x x ##x### #x x# #### xx x# ## ## #x x # ## ## ## @#H###xx################# ",
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"################# # ## x ##x x ## #x x ## ## x ## #x ## #x x# x ## ##x #@ H ################# " ]
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};
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////// FUNCTIONS //////
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function load_sprites( theme ) {
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var sprites = { };
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sprites.ball = new Image();
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sprites.ball.src = "themes/" + theme + "/tex_ball.png";
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sprites.ball_selected = new Image();
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sprites.ball_selected.src = "themes/" + theme + "/tex_ball_selected.png";
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sprites.cube = new Image();
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sprites.cube.src = "themes/" + theme + "/tex_cube.png";
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sprites.cube_selected = new Image();
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sprites.cube_selected.src = "themes/" + theme + "/tex_cube_selected.png";
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sprites.wall = new Image();
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sprites.wall.src = "themes/" + theme + "/tex_wall.png";
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sprites.empty = new Image();
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sprites.empty.src = "themes/" + theme + "/tex_empty.png";
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sprites.gift = new Image();
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sprites.gift.src = "themes/" + theme + "/tex_gift.png";
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return sprites;
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}
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function count_gifts( ) {
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var n = 0;
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for ( var i = level_infos.height * level_infos.width ; i-- ; ) {
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if ( state.board[ i ] == cell.GIFT ) {
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n++;
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}
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}
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return n;
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}
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function get_pos( actor ) {
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var p = state.board.indexOf( actor, state.board );
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var pos = { };
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pos[ 1 ] = Math.floor( p / level_infos.width ); /* y */
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pos[ 0 ] = p - ( pos[ 1 ] * level_infos.width ); /* x */
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return pos;
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}
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function get_cell( x, y ) {
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return state.board[ x + ( y * level_infos.width ) ];
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}
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function set_cell( x, y, value ) {
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var p = x + ( y * level_infos.width );
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state.board = [ state.board.substring( 0, p ), value, state.board.substring( p+1, state.board.length ) ].join( '' );
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return state;
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}
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function draw_cell( sprite, x, y ) {
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DOM_infos.canvas.context.drawImage( sprite,
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x * level_infos.cell.width,
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y * level_infos.cell.height,
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level_infos.cell.width,
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level_infos.cell.height );
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}
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function switch_actor( ) {
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state.moving = ( state.moving == cell.BALL ) ? cell.CUBE : cell.BALL;
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var ball_pos = get_pos( cell.BALL );
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var cube_pos = get_pos( cell.CUBE );
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// redraw ball
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draw_cell( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.ball, ball_pos[ 0 ], ball_pos[ 1 ] );
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// redraw cube
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draw_cell( ( state.moving == cell.CUBE ) ? assets.sprites.cube_selected : assets.sprites.cube, cube_pos[ 0 ], cube_pos[ 1 ] );
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return state;
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}
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function won_or_not( ) {
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return count_gifts( ) === 0;
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}
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function full_display_on_canvas( ) {
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for ( var i=0 ; i < level_infos.height ; i++ ) {
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for ( var j=0 ; j < level_infos.width ; j++ ) {
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var c = get_cell( j, i );
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var sprite;
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switch( c ) {
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case "@": sprite = ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.ball; break;
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case "H": sprite = ( state.moving == cell.CUBE ) ? assets.sprites.cube_selected : assets.sprites.cube; break;
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case "#": sprite = assets.sprites.wall; break;
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case "x": sprite = assets.sprites.gift; break;
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case " ": sprite = assets.sprites.empty; break;
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default: break;
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}
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draw_cell( sprite, j, i );
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}
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}
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}
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function update_infos( ) {
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var infos = "<h1>Star5</h1><br />";
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infos += "Level <em>" + (state.level+1) + "</em> of <em>" + assets.levels.length + "</em><br />";
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infos += "<em>" + count_gifts( ) + "</em> gifts left<br />";
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infos += "<em>" + state.distance_travelled + "</em> meters travelled";
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jQuery( DOM_infos.container + " .gstar #infos" ).html( infos );
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}
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function format_help( ) {
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var help = "<em>←↑→↓</em> to move around<br />";
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help += "<em>Space</em> to switch actor<br />";
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help += "<em>r</em> to reload<br />";
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help += "<em>n</em> to pass to the next level<br />";
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help += "<em>p</em> to go back to the previous level<br />";
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return help;
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}
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function display_level( ) {
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update_infos( );
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full_display_on_canvas( DOM_infos.container + " #starboard" );
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}
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function load_level( index ) {
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return( { moving: cell.BALL,
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distance_travelled: 0,
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level: index,
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board: assets.levels[ index ],
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it_s_over: false } );
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}
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function make_a_move( where ) {
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var motion = [ 0, 0 ];
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var item_coord = get_pos( state.moving );
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/* Setup the motion vector according to direction.*/
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switch( where ) {
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case direction.UP:
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motion[ 1 ]--;
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break;
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case direction.DOWN:
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motion[ 1 ]++;
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break;
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case direction.LEFT:
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motion[ 0 ]--;
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break;
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case direction.RIGHT:
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motion[ 0 ]++;
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break;
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default: break;
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}
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/* Calculating arrival coordinates */
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while ( /* Hairy conditions ahead */
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/* target cell is within level's boundaries */
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( ( item_coord[ 0 ] + motion[ 0 ] >= 0 ) && ( item_coord[ 0 ] + motion[ 0 ] < level_infos.width ) ) &&
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( ( item_coord[ 1 ] + motion[ 1 ] >= 0 ) && ( item_coord[ 1 ] + motion[ 1 ] < level_infos.height ) ) &&
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/* and target cell is empty */
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( get_cell( item_coord[ 0 ] + motion[ 0 ], item_coord[ 1 ] + motion[ 1 ] ) == cell.EMPTY )
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/* or, the ball will eat gifts so we can move it on one */
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|| ( state.moving == cell.BALL && ( get_cell( item_coord[ 0 ] + motion[ 0 ], item_coord[ 1 ] + motion[ 1 ] ) == cell.GIFT ) )
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)
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{
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state = set_cell( item_coord[ 0 ], item_coord[ 1 ], cell.EMPTY ); /* empty the origin cell */
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draw_cell( assets.sprites.empty, item_coord[ 0 ], item_coord[ 1 ] );
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item_coord[ 0 ] += motion[ 0 ]; /* move coordinate */
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item_coord[ 1 ] += motion[ 1 ]; /* to those of target cells */
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state = set_cell( item_coord[ 0 ], item_coord[ 1 ], state.moving ); /* move actor into target cell */
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draw_cell( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.cube_selected, item_coord[ 0 ], item_coord[ 1 ] );
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state.distance_travelled++; /* increment distance_travelled */
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}
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update_infos( );
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return state;
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}
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function event_handler( e ) {
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if ( !state.it_s_over ) {
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if ( e.type === "click" ) {
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var movingpos = get_pos( state.moving );
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var notmovingpos = get_pos( ( state.moving != cell.BALL ) ? cell.BALL : cell.CUBE );
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var click = { };
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click.x = e.pageX - DOM_infos.canvas.offset.left;
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click.y = e.pageY - DOM_infos.canvas.offset.top;
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if ( ( 0 <= click.x && click.x < DOM_infos.canvas.width )
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&& ( 0 <= click.y && click.y < DOM_infos.canvas.height ) ) {
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// coordinates in cell indexes
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click.x = Math.floor( click.x / level_infos.cell.width );
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click.y = Math.floor( click.y / level_infos.cell.height );
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// We're inside the board
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if ( click.x == notmovingpos[0] && click.y == notmovingpos[1] ) {
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state.moving = ( state.moving != cell.BALL ) ? cell.BALL : cell.CUBE;
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} else if ( click.x == movingpos[0] ) {
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if ( click.y > movingpos[1] ) {
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state = make_a_move( direction.DOWN );
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} else if ( click.y < movingpos[1] ) {
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state = make_a_move( direction.UP );
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}
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} else if ( click.y == movingpos[1] ) {
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if ( click.x > movingpos[0] ) {
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state = make_a_move( direction.RIGHT );
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} else {
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state = make_a_move( direction.LEFT );
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}
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}
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}
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} else if ( e.type === "keydown" ) {
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switch( e.keyCode ) {
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case 37: // LEFT
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case 38: // UP
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case 39: // RIGHT
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case 40: // DOWN
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state = make_a_move( e.keyCode );
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break;
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case 32: // SPACE
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state = switch_actor( );
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break;
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case 78: // n
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if ( state.level < assets.levels.length - 1 ) {
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state = load_level( state.level + 1 );
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display_level( );
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}
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break;
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case 80: // p
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if ( state.level > 0 ) {
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state = load_level( state.level - 1 );
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display_level( );
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}
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break;
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case 82: // r
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state = load_level( state.level );
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display_level( );
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break;
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default:
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break;
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}
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}
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if ( won_or_not( ) ) {
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if ( state.level < assets.levels.length - 1 ) {
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state = load_level( state.level + 1 );
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display_level( );
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}
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else {
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state.it_s_over = true;
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alert( "You won!" );
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}
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}
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}
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}
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////// MAIN (so to speak) //////
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// First of all, setup our little DOM branch
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var starhtml = '<div class="gstar">';
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starhtml += '<aside id="help">' + format_help( ) + '</aside>';
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starhtml += '<canvas id="starboard" width="320" height="180"></canvas>';
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starhtml += '<aside id="infos"></aside>';
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starhtml += '</div>';
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jQuery( dom_container ).html( starhtml );
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// Now we can collect some informations about this DOM branch we have
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var DOM_infos = {
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container: dom_container,
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canvas: {
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//jQuery() returns a jquery object, [0] to get the canvas itself
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context: jQuery( dom_container + " #starboard" )[ 0 ].getContext( '2d' ),
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offset: jQuery( dom_container + " #starboard" ).offset(),
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width: jQuery( dom_container + " #starboard" ).width(),
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height: jQuery( dom_container + " #starboard" ).height()
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}
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};
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var level_infos = {
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height: 9,
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width: 16,
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cell: {
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width: DOM_infos.canvas.width / 16,
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height: DOM_infos.canvas.height / 9
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}
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};
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var state = load_level( ( level_index === undefined ) ? 0 :
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( level_index >= assets.levels.length ) ? assets.levels.length - 1 :
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( level_index < 0 ) ? 0 : level_index );
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// kinda ugly workaround around a mysterious bug causing the canvas
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// not to refresh the first time (before any event)
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setTimeout( function(){ display_level( ); }, 100 ); // 1/10 second
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// Start main "loop"
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jQuery(document).focus( );
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jQuery(document).click( event_handler );
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jQuery(document).keydown( event_handler );
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}
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