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main.lua
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main.lua
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-- main.lua, only source file of 'Life of Land Shark'
-- licensed under the zlib license but I haven't understood
-- LOVE animations yet and suppose that my use of them is
-- wrong, so this piece is probably worthless for derivation
-- anyways.
function load()
-- create shark (class?)
shark = {
sound = {
bites = {},
},
anim = {
walk = {},
bite = {},
},
}
-- load bite sounds
shark.sound.bites = {
love.audio.newSound("sound/land_shark_bite_1.ogg"),
love.audio.newSound("sound/land_shark_bite_2.ogg"),
love.audio.newSound("sound/land_shark_bite_3.ogg"),
love.audio.newSound("sound/land_shark_bite_4.ogg"),
love.audio.newSound("sound/land_shark_bite_5.ogg"),
love.audio.newSound("sound/land_shark_bite_6.ogg"),
love.audio.newSound("sound/land_shark_bite_7.ogg"),
}
-- load walk animation
shark.anim.walk.left = love.graphics.newAnimation(love.graphics.newImage("animation/land_shark_walk_left.png"), 28, 2, 0.15)
shark.anim.walk.right = love.graphics.newAnimation(love.graphics.newImage("animation/land_shark_walk_right.png"), 28, 2, 0.15)
-- load bite animation
shark.anim.bite.left = love.graphics.newAnimation(love.graphics.newImage("animation/land_shark_bite_left.png"), 28, 22, 0.1)
shark.anim.bite.right = love.graphics.newAnimation(love.graphics.newImage("animation/land_shark_bite_right.png"), 28, 22, 0.1)
-- init shark status
shark.bites = false
shark.walks = false
shark.facesLeft = false
shark.position = 233
-- shark's speed
shark.speed = 20
-- colors
colors = {
blue = love.graphics.newColor(030,115,175),
green = love.graphics.newColor(070,155,090),
grey = love.graphics.newColor(117,114,120),
}
love.graphics.setBackgroundColor(love.graphics.newColor(145,185,185))
dtSum = 0 -- used for periodically start/stop walking, biting and changing direction
dtLimit = 1 -- intervall in which updates to previously mentioned attributes happen
-- key/control management
keyDown = {
left = false,
right = false,
space = false,
}
end
function update(dt)
dtSum = dtSum + dt
-- randomly walk/bite/changedirection
if keyDown.left == false and keyDown.right == false and keyDown.space == false and dtSum > dtLimit then
dtSum = dtSum - dtLimit
if math.random(1,3) == 1 then -- start/stop walking
shark.walks = not shark.walks
end
if math.random(1,3) == 1 then -- bite
shark.bites = true
love.audio.play(shark.sound.bites[math.random(1,#shark.sound.bites)])
end
if math.random(1,6) == 1 then -- change direction
shark.facesLeft = not shark.facesLeft
end
end
--refresh shark position
if shark.walks then
if shark.facesLeft then
shark.position = shark.position - shark.speed * dt
else
shark.position = shark.position + shark.speed * dt
end
end
-- refresh walk animation
if shark.walks then
shark.anim.walk.left:update(dt)
shark.anim.walk.right:update(dt)
end
-- refresh bite animation
if shark.bites then
shark.anim.bite.left:update(dt)
shark.anim.bite.right:update(dt)
if shark.anim.bite.left:getCurrentFrame() == 3 then
shark.bites = false
shark.anim.bite.left:reset()
shark.anim.bite.right:reset()
end
end
-- over-border-walking-prevention
if shark.position > 600 then shark.facesLeft = true end
if shark.position < 60 then shark.facesLeft = false end
end
function draw()
-- draw floor, water, rock
love.graphics.setColor(colors.green)
love.graphics.rectangle(0,0,72,640,56)
love.graphics.setColor(colors.blue)
love.graphics.rectangle(0,0,72,60,56)
love.graphics.setColor(colors.grey)
love.graphics.rectangle(0,600,0,40,80)
-- draw shark
if shark.facesLeft then
love.graphics.draw(shark.anim.walk.left, shark.position, 80)
love.graphics.draw(shark.anim.bite.left, shark.position, 68)
else
love.graphics.draw(shark.anim.walk.right, shark.position, 80)
love.graphics.draw(shark.anim.bite.right, shark.position, 68)
end
end
function keypressed(key)
if key == love.key_space then
keyDown.space = true
shark.bites = true
love.audio.play(shark.sound.bites[math.random(1,#shark.sound.bites)])
elseif key == love.key_left then
keyDown.left = true
shark.facesLeft = true
shark.walks = true
elseif key == love.key_right then
keyDown.right = true
shark.facesLeft = false
shark.walks = true
end
end
function keyreleased(key)
if key == love.key_space then
keyDown.space = false
elseif key == love.key_left then
keyDown.left = false
shark.walks = false
elseif key == love.key_right then
keyDown.right = false
shark.walks = false
end
end