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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
require "data.directions"
local physics = require "logic.physics"
local bullets = require "logic.bullets"
local audio = require "utils.audio"
local FrameTimer = require "utils.frameTimer"
local Player = {}
Player.__index = Player
function Player.new()
local player = setmetatable({
objectType = "player",
x = love.graphics.getWidth() / 2,
y = love.graphics.getHeight() / 2,
r = config.player.size,
zoom = 1/16,
speed = config.defaultPlayerSpeed,
shieldedTill = 0,
hearts = { "redheart", "redheart", "redheart", "shinyheart", "shinyheart", "stickyheart" },
facing = Direction.DOWN,
moving = false,
frameTimer = FrameTimer:new(config.frameRate, 2)
}, Player)
physics.bodifyObject(G.world, player)
return player
end
-- placement and location
function Player:setX(x)
self.physicsBody:setX(x)
self.x = x
end
function Player:setY(y)
self.physicsBody:setY(y)
self.y = y
end
function Player:move(v)
if self.knocked and self.knocked >= G.time then return end
self.moving = (v.x ~= 0 or v.y ~= 0)
self.physicsBody:setLinearVelocity(v.x, v.y)
end
-- status getter
function Player:isShielded()
return self.shieldedTill >= G.time
end
function Player:isAlive()
return #self.hearts ~= 0
end
function Player:ammoCooling()
return G.player.shootCooldown and G.player.shootCooldown > G.time
end
-- control functions
function Player:speedUp(increment, duration)
self.speed = self.speed + increment
self.speedUpTill = G.time + duration
end
function Player:shoot(target)
local hearts = self.hearts
local currentBullet = hearts[#hearts]
-- red hearts and the last heart will take some more time to shoot
if currentBullet == "redheart" or #hearts == 1 then
-- set a charging time to warn the player that this is a deadly move
-- if no charging time is set, then set it and shoot no bullet
if not self.chargingStarted then
self.chargingStarted = G.time
return
end
-- if charging time is set, then check if it's over 1 second
-- if not, shoot no bullet
if G.time - self.chargingStarted <= 1 then return
-- if time's up, reset timer and continue shooting
else
self.chargingStarted = nil
end
end
-- shoot the bullet
bullets.fire(currentBullet, target, self)
table.remove(self.hearts)
self.shootCooldown = G.time + config.playerShootCooldown
end
function Player:punchCoolingDown()
return self.punchCooldown and self.punchCooldown > G.time
end
function Player:punch(target)
-- cool down after one punch
if self:punchCoolingDown() then return end
self.punchCooldown = G.time + config.player.punch.cooldown
-- arguments
local attack_radius = config.player.punch.radius
local attack_angle = config.player.punch.angle
local knockback_force = config.player.punch.force
-- calculate attack direction
local dx = target.x - self.x
local dy = target.y - self.y
local attack_angle_rad = utils.atan2(dy, dx)
local length = math.sqrt(dx * dx + dy * dy)
if length == 0 then return end
local normX, normY = dx / length, dy / length
-- find enemies in range
for _, enemy in ipairs(G.currentRoom.objects.enemies) do
local ex, ey = enemy.x, enemy.y
local edx, edy = ex - self.x, ey - self.y
local distance = math.sqrt(edx * edx + edy * edy)
local enemy_angle_rad = utils.atan2(edy, edx)
local angle_diff = math.abs((enemy_angle_rad - attack_angle_rad + math.pi) % (2 * math.pi) - math.pi) -- 计算夹角
-- check if enemy is in range
if distance <= attack_radius + enemy.r + self.r and angle_diff <= math.rad(attack_angle / 2) then
local damage = config.player.punch.damage
+ config.player.punch.damageCoefficient / (1 - math.exp(-#self.hearts / 5))
enemy:takeDamage(damage)
enemy.punched = G.time + config.player.punch.cooldown
-- knock back enemy
local normEdx, normEdy = edx / distance, edy / distance
local knockbackX, knockbackY = normEdx * knockback_force, normEdy * knockback_force
enemy.physicsBody:applyLinearImpulse(knockbackX, knockbackY)
end
end
audio.play("punch")
end
function Player:onContact(other, contact)
-- detect contact with enemies
if other.objectType == "enemy" then
-- if player's not shielded nor the enemy's stunned
-- take the damage
if not (other.stunned or self:isShielded()) then
audio.play("getsHit")
table.remove(self.hearts)
-- knock back Player
local ex, ey = other.x, other.y
local dx, dy = self.x - ex, self.y - ey
local distance = math.sqrt(dx * dx + dy * dy)
local normEdx, normEdy = dx / distance, dy / distance
local knockbackX, knockbackY = normEdx * config.player.knockback.force,
normEdy * config.player.knockback.force
self.knocked = G.time + config.player.knockback.duration
self.physicsBody:applyLinearImpulse(knockbackX, knockbackY)
-- shield this player
self.shieldedTill = G.time + config.playerShieldTime
end
end
end
function Player:update(dt)
-- temp
self.x = self.physicsBody:getX()
self.y = self.physicsBody:getY()
-- deal with speed up time
if self.speedUpTill and self.speedUpTill < G.time then
self.speed = config.defaultPlayerSpeed
self.speedUpTill = nil
end
-- play warning sound if health is low
if #self.hearts <= 1 then
audio.play("warning", true, 0.5)
else
audio.stop("warning")
end
self.frameTimer:update(dt)
end
return Player
|
