I want to shoot a bullet in the direction the tank is facing. I use Accelerometer to control the angle of my tank. i want my tank to shoot on the direction it is facing as i tilt my device. With my current script it only shoots vertically.
To duplicate the problem i couldn't shrink my code than this
from kivy.app import App
from kivy.uix.image import Image
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ReferenceListProperty, ObjectProperty,ListProperty, BooleanProperty
from kivy.vector import Vector
from kivy.clock import Clock
import random
import math
from plyer import accelerometer
from kivy.lang import Builder
Builder.load_string("""
<Tank>:
canvas.before:
PushMatrix
Rotate:
angle: self.angle
origin: self.center
canvas.after:
PopMatrix
<Flame>:
canvas.before:
PushMatrix
Rotate:
angle: self.angle
origin: self.center
canvas.after:
PopMatrix
<AccelerometerGun>:
tank: tank
x_label: x_label
canvas:
Rectangle:
source: "wood.png"
#texture: root.bg_image.texture#source: "images/bg.png"
size: self.size#root.size[0]+200, root.size[1]
pos: self.pos#root.pos
Label:
id: x_label
text: "Tilt value "
center: self.parent.center
Tank:
id: tank
center: (root.width/2, 70) #self.parent.center
""")
class Flame(Image):
velocity_x = NumericProperty(0)
active = BooleanProperty(False)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
angle = NumericProperty(0)
def __init__(self, **kwargs):
super(Flame, self).__init__(**kwargs)
self.size_hint=(None, None)
self.source = "zn.zip"
self.anim_delay= 0.35
self.anim_loop = 1
rs = random.randint(70, 80)
self.size = (rs, rs)
self.bind(active=self.addV)
def addV(self, *args):
self.velocity_y += random.uniform(20.0, 25.0)
self.velocity_x += 0
def move(self, pa):
self.pos = Vector(*self.velocity) + self.pos
self.angle = random.randint(0, 360)
self.size = (self.size[0]+1, self.size[1]+1)
if (self.y > pa.top/1.6):
pa.removeThis(self)
self.velocity_y = 0
self.velocity_x = 0
class Tank(Image):
velocity_x = NumericProperty(0)
activated = BooleanProperty(False)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
angle = NumericProperty(180)
def __init__(self, **kwargs):
super(Tank, self).__init__(**kwargs)
self.source = 'bomb.png'
self.anim_delay = 0.05
def move(self, pa):
self.pos = Vector(*self.velocity) + self.pos
if (self.y < 0-self.size[0]):
self.velocity_y *= 0
if (self.x < 0):
self.velocity_x *= 0
if (self.right > pa.width):
self.velocity_x = 0
class AccelerometerGun(Widget):
tank = ObjectProperty(None)
angle = NumericProperty(180)
pr = NumericProperty(0.0)
flames = []
def start(self):
self.tank.center = (self.width/2, 70)
self.x_label.center = self.center
self.tank.velocity = 0, 0
accelerometer.enable()
def update(self, dt):
#self.tank.move(self)
if self.tank.activated:
val = accelerometer.acceleration[:3]
if not val == (None, None, None):
x, y, z = val[0], val[1], val[2]
self.x_label.text = " ".join(["X", ": " + str(x)])
self.change(x, y)
if len(self.flames) != 0:
for tank in self.flames:
if tank.active:
tank.move(self)
def change(self, vx, vy):
max = 2.99
min = -2.9
range = max - min
correctedStartValue = vx - min
percentage = (correctedStartValue * 180) / range
if percentage > 180:
percentage = 180
if percentage < 0:
percentage = 0
if vx == 0.0:
percentage = 90
self.tank.angle = percentage
self.addFlame()
self.x_label.text = " ".join(["X: ", str(int(vx)), "%: ", str(percentage), "Fps: ", str(int(Clock.get_fps()))])
self.tank.velocity_y = 0
self.tank.velocity_x = 0
#self.tank.move(self)
def removeThis(self, bl):
self.flames.remove(bl)
self.remove_widget(bl)
bl = None
def startFlame(self, *args):
for tank in self.flames:
if not tank.active:
tank.active = True
def addFlame(self, *args):
self.fl = Flame()
self.add_widget(self.fl)
self.fl.center = self.tank.center
self.flames.append(self.fl)
self.fl.velocity = 0, 0
if len(self.flames) != 0:
self.startFlame()
def on_touch_down(self, touch):
self.tank.activated = True
class AccelerometerApp(App):
def build(self):
game = AccelerometerGun()
game.start()
Clock.schedule_interval(game.update, 1.0 / 60.0)
return game
if __name__ == '__main__':
AccelerometerApp().run()
Note: i want to move the bullet by using Vector not Animation
I tried solving the question myself.
def velX(self, vex):
for tank in self.flames:
if tank.active:
tank.velocity_x = -(vex*2.5) #+= -vel
and call it like this
def change(self, vx, vy):
max = 2.99
min = -2.9
range = max - min
correctedStartValue = vx - min
percentage = (correctedStartValue * 180) / range
if percentage > 180:
percentage = 180
if percentage < 0:
percentage = 0
if vx == 0.0:
percentage = 90
self.tank.angle = percentage
self.addFlame()
self.x_label.text = " ".join(["X: ", str(int(vx)), "%: ", str(percentage), "Fps: ", str(int(Clock.get_fps()))])
self.tank.velocity_y = 0 #(vy*-1)*3.5
self.tank.velocity_x = 0 #(vx*-1)*3.5
#self.tank.move(self)
self.velX(vx)