1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
local obj = require "obj"
obj.load_types()
line = love.graphics.line
function box(x, y, w, h) line(x, y, x + w, y, x + w, y + h, x, y + h, x, y) end
set_color = love.graphics.setColor
local line_width = 0.4
local cam = {
x = 0, y = 0,
scale = 1.1,
panning = false,
}
local dragging
local selecting
local selection
for i = 1, 100 do
obj.new("test", {math.random() * 1000 - 500, math.random() * 1000 - 500}, {
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
local function draw_world()
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.push()
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 + 64, y)
line(x, y, x, y + 64)
end
end
-- draw all possibly visible objects
for o in obj.in_box(
cx1 - obj.max_size, cy1 - obj.max_size,
cx2 + obj.max_size, cy2 + obj.max_size) do
set_color(1, 1, 1)
o:draw()
end
if selection then
set_color(1, 1, 0.5)
for o in pairs(selection) do
local x, y = unpack(o.data.pos)
box(x - o.hitbox, y - o.hitbox, o.hitbox*2, o.hitbox*2)
end
end
love.graphics.pop()
end
local function draw_hud()
love.graphics.push()
love.graphics.applyTransform(window_transform())
love.graphics.setLineWidth(line_width)
-- things
love.graphics.pop()
end
function love.draw()
love.graphics.clear(0, 0, 0)
draw_world()
draw_hud()
end
function love.update()
if not (selection or dragging) then
for o in obj.all() do
o:tick()
end
end
end
function love.mousepressed(x, y, button)
local x, y = view_transform():inverseTransformPoint(x, y)
if button == 1 then
elseif button == 2 then
cam.panning = true
end
end
function love.mousereleased(x, y, button)
local x, y = view_transform():inverseTransformPoint(x, y)
if button == 1 then
if not dragging then
local clicked = obj.at(x, y)()
if not love.keyboard.isDown "lshift" then
if clicked and not (selection and selection[clicked]) then
selection = {[clicked] = true}
else
selection = nil
end
elseif clicked then
selection = selection or {}
selection[clicked] = true
end
else
selecting = nil
end
dragging = nil
elseif button == 2 then
cam.panning = false
end
end
function love.mousemoved(x, y, dx, dy)
local x, y = view_transform():inverseTransformPoint(x, y)
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
|
