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local world = require "world"
local obj = require "obj"
obj.load_types()
line = love.graphics.line
set_color = love.graphics.setColor
line_width = 0.4
local cam = {
x = 0, y = 0,
scale = 1.1,
panning = false,
}
for i = 1, 100 do
obj.new("test", {math.random() * 1000, math.random() * 1000}, {
avel = math.random() * 0.5 - 0.25,
vel = {math.random() * 0.5 - 0.25, math.random() * 0.5 - 0.25}
})
end
obj.new("test", {0, 0})
local function window_scale()
local w, h = love.graphics.getDimensions()
return 256 / math.min(w, h)
end
local function view_scale()
return window_scale() / cam.scale
end
local function view_dimensions()
local w, h = love.graphics.getDimensions()
local scale = view_scale()
return w * scale, h * scale
end
local function window_transform()
local scale = window_scale()
local trans = love.math.newTransform(0, 0, 0, 1/scale, 1/scale)
return trans
end
local function view_transform()
local w, h = view_dimensions()
local trans = window_transform()
trans:scale(cam.scale, cam.scale)
trans:translate(-cam.x + w/2, -cam.y + h/2)
return trans
end
function love.draw()
love.graphics.clear(0, 0, 0)
local w, h = view_dimensions()
local cx1, cy1 = cam.x - w/2, cam.y - h/2
local cx2, cy2 = cam.x + w/2, cam.y + h/2
love.graphics.applyTransform(view_transform())
-- the line thickness will scale according to the zoom amount. counteract this.
love.graphics.setLineWidth(line_width / cam.scale)
-- draw a grid
set_color(0.1, 0.1, 0.1)
for x = cx1 - cx1%64, cx2, 64 do
for y = cy1 - cy1%64, cy2, 64 do
line(x, y, x + world.chunk_size, y)
line(x, y, x, y + world.chunk_size)
end
end
-- draw all possibly visible objects
for o in world.iterate(cx1 - 20, cy1 - 20, cx2 + 20, cy2 + 20) do
set_color(1, 1, 1)
o:draw()
end
love.graphics.origin()
love.graphics.applyTransform(window_transform())
love.graphics.setLineWidth(line_width)
set_color(1, 1, 1)
end
function love.update()
for _, o in pairs(world.objects) do
o:tick()
end
end
function love.mousepressed(_, _, button)
if button == 2 then
cam.panning = true
end
end
function love.mousereleased(_, _, button)
if button == 2 then
cam.panning = false
end
end
function love.mousemoved(_, _, dx, dy)
if cam.panning then
local scale = view_scale()
dx, dy = dx * scale, dy * scale
cam.x = cam.x - dx
cam.y = cam.y - dy
end
end
function love.wheelmoved(_, y)
cam.scale = math.min(math.max(cam.scale + (y * 0.1), 0.25), 4)
end
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