121 lines
3.5 KiB
Lua
121 lines
3.5 KiB
Lua
------------------------------------------------------------------------------
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-- Imports
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------------------------------------------------------------------------------
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local love = require 'love'
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local game_states = require 'src.states'
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------------------------------------------------------------------------------
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-- Variables
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------------------------------------------------------------------------------
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Current_state = 1
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Fade_in = 0.0
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Fade_out = 1.0
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Change_state = false
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------------------------------------------------------------------------------
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-- Game methods
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------------------------------------------------------------------------------
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local function lerp(a, b, t)
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-- Linear interpolation between two values a and b, by a t between 0.0 and 1.0
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return (a * t) + (b * (1.0 - t))
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end
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------------------------------------------------------------------------------
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-- Game methods
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------------------------------------------------------------------------------
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function love.load()
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game_states[Current_state]:load()
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end
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function love.update(dt)
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local new_state = game_states[Current_state]:update(dt)
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-- If the game state changed then trigger a fade out.
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if new_state ~= Current_state and Fade_out >= 1.0 then
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Fade_out = 0.0
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Change_state = true
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end
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-- If there is a fade in going then update it.
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if Fade_in < 1.0 then
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Fade_in = Fade_in + (dt / 2)
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end
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-- If there is a fade out going then update it.
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if Fade_out < 1.0 then
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Fade_out = Fade_out + (dt / 2)
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end
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-- Update the game state.
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if game_states[new_state] == nil then
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-- If the new state doesn't exist then wait for the fade out to end and quit.
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if Fade_out >= 1.0 then
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game_states[Current_state]:unload(dt)
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love.event.quit()
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end
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else
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-- If the new state exists then unload it's data and set the new state.
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if Change_state and Fade_out >= 1.0 then
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game_states[Current_state]:unload(dt)
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Current_state = new_state
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game_states[Current_state]:load()
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Change_state = false
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end
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end
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end
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function love.draw()
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-- Reset the drawing color and clear the screen.
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love.graphics.clear()
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-- Render the current game state.
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game_states[Current_state]:draw()
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-- If there is a fade in going then render it.
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if Fade_in < 1.0 then
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love.graphics.setColor(0, 0, 0)
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love.graphics.circle('fill', -320, love.graphics.getHeight() / 2, lerp(0, 400 * 2, Fade_in))
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love.graphics.setColor()
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end
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-- If there is a fade out going then render it.
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if Fade_out < 1.0 then
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love.graphics.setColor(0, 0, 0)
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love.graphics.circle('fill', -320, love.graphics.getHeight() / 2, lerp(400 * 2, 0, Fade_out))
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love.graphics.setColor()
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end
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end
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function love.keypressed(key)
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-- Send events to the active game state if there is no fade active.
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if Fade_in >= 1.0 and Fade_out >= 1.0 then
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game_states[Current_state]:keypressed(key)
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end
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end
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function love.mousemoved(x, y)
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-- Send events to the active game state if there is no fade active.
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if Fade_in >= 1.0 and Fade_out >= 1.0 then
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game_states[Current_state]:mousemoved(x, y)
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end
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end
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function love.mousepressed(x, y, btn)
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-- Send events to the active game state if there is no fade active.
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if Fade_in >= 1.0 and Fade_out >= 1.0 then
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game_states[Current_state]:mousemoved(x, y, btn)
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end
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end
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