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factorized drawing cell on canvas

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This commit is contained in:
Gwenhael Le Moine 2011-07-14 10:47:17 +02:00
parent 9efab8a024
commit 3d34335f50
1 changed files with 13 additions and 25 deletions
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38
js/star.js
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@ -118,23 +118,23 @@ function initialize_a_star( dom_container ) {
return state;
}
function draw_cell( sprite, x, y ) {
DOM_infos.canvas.context.drawImage( sprite,
x * level_infos.cell.width,
y * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
}
function switch_actor( ) {
state.moving = ( state.moving == cell.BALL ) ? cell.CUBE : cell.BALL;
var ball_pos = get_pos( cell.BALL );
var cube_pos = get_pos( cell.CUBE );
// redraw ball
DOM_infos.canvas.context.drawImage( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.ball,
ball_pos[ 0 ] * level_infos.cell.width,
ball_pos[ 1 ] * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
draw_cell( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.ball, ball_pos[ 0 ], ball_pos[ 1 ] );
// redraw cube
DOM_infos.canvas.context.drawImage( ( state.moving == cell.CUBE ) ? assets.sprites.cube_selected : assets.sprites.cube,
cube_pos[ 0 ] * level_infos.cell.width,
cube_pos[ 1 ] * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
draw_cell( ( state.moving == cell.CUBE ) ? assets.sprites.cube_selected : assets.sprites.cube, cube_pos[ 0 ], cube_pos[ 1 ] );
return state;
}
@ -154,11 +154,7 @@ function initialize_a_star( dom_container ) {
case "x": sprite = assets.sprites.gift; break;
case " ": sprite = assets.sprites.void; break;
}
DOM_infos.canvas.context.drawImage( sprite,
j * level_infos.cell.width,
i * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
draw_cell( sprite, j, i );
}
}
}
@ -228,22 +224,14 @@ function initialize_a_star( dom_container ) {
{
state = set_cell( item_coord[ 0 ], item_coord[ 1 ], cell.VOID ); /* void the origin cell */
// voiding origin cell on canvas
DOM_infos.canvas.context.drawImage( assets.sprites.void,
item_coord[ 0 ] * level_infos.cell.width,
item_coord[ 1 ] * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
draw_cell( assets.sprites.void, item_coord[ 0 ], item_coord[ 1 ] );
item_coord[ 0 ] += motion[ 0 ]; /* move coordinate */
item_coord[ 1 ] += motion[ 1 ]; /* to those of target cells */
state = set_cell( item_coord[ 0 ], item_coord[ 1 ], state.moving ); /* move actor into target cell */
// drawing target cell on canvas
DOM_infos.canvas.context.drawImage( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.cube_selected,
item_coord[ 0 ] * level_infos.cell.width,
item_coord[ 1 ] * level_infos.cell.height,
level_infos.cell.width,
level_infos.cell.height );
draw_cell( ( state.moving == cell.BALL ) ? assets.sprites.ball_selected : assets.sprites.cube_selected, item_coord[ 0 ], item_coord[ 1 ] );
state.distance_travelled++; /* increment distance_travelled */
}