diff options
Diffstat (limited to 'examples/snake/main.lua')
| -rw-r--r-- | examples/snake/main.lua | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/examples/snake/main.lua b/examples/snake/main.lua index 3e047ee..026e621 100644 --- a/examples/snake/main.lua +++ b/examples/snake/main.lua @@ -57,7 +57,7 @@ local function setApplePos() while search do search = false - applePos = Vec2:new( math.random( 0, LEVEL_SIZE - 1 ), math.random( 0, LEVEL_SIZE - 1 ) ) + applePos:set( math.random( 0, LEVEL_SIZE - 1 ), math.random( 0, LEVEL_SIZE - 1 ) ) for _, seg in ipairs( snake.segments ) do search = applePos == seg.pos @@ -99,16 +99,16 @@ local function moveSnake() -- Move body. for i, seg in ipairs( snake.segments ) do if i < #snake.segments then - seg.pos = snake.segments[ i+1 ].pos:clone() - seg.heading = snake.segments[ i+1 ].heading:clone() + seg.pos:setV( snake.segments[ i+1 ].pos ) + seg.heading:setV( snake.segments[ i+1 ].heading ) else - seg.pos = snake.headPos:clone() - seg.heading = snake.heading:clone() + seg.pos:setV( snake.headPos ) + seg.heading:setV( snake.heading ) end end -- Move head. - snake.heading = Vec2:new( snake.control.x, snake.control.y ) - snake.headPos = Vec2:new( snake.headPos.x + snake.heading.x, snake.headPos.y + snake.heading.y ) + snake.heading:set( snake.control.x, snake.control.y ) + snake.headPos:set( snake.headPos.x + snake.heading.x, snake.headPos.y + snake.heading.y ) -- Check appple eating. if snake.headPos == applePos then @@ -133,13 +133,13 @@ function RL.update( delta ) if gameState == STATE.GAME then -- Run game. -- Controls. if RL.IsKeyPressed( RL.KEY_RIGHT ) and 0 <= snake.heading.x then - snake.control = Vec2:new( 1, 0 ) + snake.control:set( 1, 0 ) elseif RL.IsKeyPressed( RL.KEY_LEFT ) and snake.heading.x <= 0 then - snake.control = Vec2:new( -1, 0 ) + snake.control:set( -1, 0 ) elseif RL.IsKeyPressed( RL.KEY_DOWN ) and 0 <= snake.heading.y then - snake.control = Vec2:new( 0, 1 ) + snake.control:set( 0, 1 ) elseif RL.IsKeyPressed( RL.KEY_UP ) and snake.heading.y <= 0 then - snake.control = Vec2:new( 0, -1 ) + snake.control:set( 0, -1 ) end moveTimer = moveTimer - gameSpeed * delta @@ -167,16 +167,16 @@ end --[[ Check if next segment is on left side. There are more mathematically elegant solution to this, but there is only four possibilities so we can just check them all. ]]-- local function onLeft( this, nextSeg ) - return ( this == Vec2:new( 0, -1 ) and nextSeg == Vec2:new( -1, 0 ) ) - or ( this == Vec2:new( -1, 0 ) and nextSeg == Vec2:new( 0, 1 ) ) - or ( this == Vec2:new( 0, 1 ) and nextSeg == Vec2:new( 1, 0 ) ) - or ( this == Vec2:new( 1, 0 ) and nextSeg == Vec2:new( 0, -1 ) ) + return ( this == Vec2:temp( 0, -1 ) and nextSeg == Vec2:temp( -1, 0 ) ) + or ( this == Vec2:temp( -1, 0 ) and nextSeg == Vec2:temp( 0, 1 ) ) + or ( this == Vec2:temp( 0, 1 ) and nextSeg == Vec2:temp( 1, 0 ) ) + or ( this == Vec2:temp( 1, 0 ) and nextSeg == Vec2:temp( 0, -1 ) ) end local function drawSnake() for i, seg in ipairs( snake.segments ) do local angle = seg.heading:atan2() - local source = Rect:new( 16, 0, 8, 8 ) + local source = Rect:temp( 16, 0, 8, 8 ) if i == 1 then -- Tail segment. Yes tail is actually the 'first' segment. source.x = 8 |