Pygame- make bullet shoot toward cursor direction

» python » Pygame- make bullet shoot toward cursor direction

By : user3042728

Date : November 29 2020, 12:01 PM

around this issue The issue is that you calculate the the direction of the bullet by vector from the current position of the bullet to the target point (bullet.targetX, bullet.targetY).
Once the bullet reaches the target, then this direction is (0, 0) and the bullet doesn't move any more.

code :

bullet.diffX = targetX - bullet.x
bullet.diffY = targetY - bullet.y

ang = math.atan2(bullet.diffY, bullet.diffX)
bullet.x += math.cos(ang)*bullet.vel
bullet.y += math.sin(ang)*bullet.vel

for bullet in bullets:
   if pygame.Rect(0, 0, 1000, 800).collidepoint(bullet.x, bullet.y):
       # [...]

for bullet in bullets:
   radius = 5
   bullet_rect = pygame.Rect(-radius, -radius, radius, radius);
   bullet_rect.center = (bullet.x, bullet.y)
   if pygame.Rect(0, 0, 1000, 800).colliderect(bullet_rect):
       # [...]

bullet.pos = pg.math.Vector2(bullet.x, bullet.y)
bullet.dir = pg.math.Vector2(targetX, targetY) - bullet.pos
bullet.dir = bullet.dir.normalize()

for bullet in bullets:

    if #[...]

        bullet.pos += bullet.dir * bullet.vel
        bullet.x, bullet.y = (round(bullet.pos.x), round(bullet.pos.y))

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HTML5 - JS: Shoot Bullet From Facing Direction

By : Richard D.

Date : March 29 2020, 07:55 AM

I wish this help you Actually, I would recommend not using trig functions, simply for efficiency. Math.atan2, Math.cos, and Math.sin can get expensive.
You already have (slightly renamed)

code :

var deltaX = input.mouseX - (this.localX + this.width/2);
var deltaY = input.mouseY - (this.localY + this.height/2);

var magnitude = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
var velocityScale = bulletSpeed / magnitude;
velocityInstance.x = deltaX * velocityScale;
velocityInstance.y = deltaY * velocityScale;

pygame: I am trying to shoot a bullet from my Tank but I can't find the start point of the bullet

By : kimig82

Date : March 29 2020, 07:55 AM

Any of those help part of the Tanks class: , You need something like this

code :

a = RealTank.Trect.centerx + math.cos(math.radians(RealTank.turret_angle+90))*55
b = RealTank.Trect.centery + math.sin(math.radians(RealTank.turret_angle-90))*55

pygame.draw.circle(screen,red,[int(a), int(b)],5,0)

How to shoot a bullet at an angle in pygame?

By : user1745632

Date : March 29 2020, 07:55 AM

this one helps. You should normalize the distance to the mouse if you want the speed not to depend on the mouse distance.
In other words, regardless of where the mouse is, use the coordinates of the point which is in that same direction, but at a fixed distance from the starting position, e.g. when you calculate your b_m_xand b_m_y, do this:

code :

b_m_x, b_m_y = m_x - self.pos.x, m_y - self.pos.y

distance = (b_m_x ** 2 + b_m_y ** 2) ** .5

if distance != 0:
    # if distance is 0, nothing can be done

    NORMALIZED_DISTANCE = 100
    mutiplier = NORMALIZED_DISTANCE / distance

    b_m_x *= multipler
    b_m_y *= multipler

How to shoot bullets from a character facing in direction of cursor in pygame?

By : Div1000

Date : March 29 2020, 07:55 AM

this will help Pass the mouse position to rotator.shoot(), when the mouse button is pressed:

code :

if event.type == pg.MOUSEBUTTONDOWN:
    rotator.shoot(event.pos)

def shoot(self, mousepos):
    dx = mousepos[0] - self.rect.centerx
    dy = mousepos[1] - self.rect.centery
    if abs(dx) > 0 or abs(dy) > 0:
        bullet = Bullet(self.rect.centerx, self.rect.centery, dx, dy)
        all_sprites.add(bullet)
        bullets.add(bullet)

class Bullet(pg.sprite.Sprite):
    def __init__(self, x, y, dx, dy):
        pg.sprite.Sprite.__init__(self)
        self.image = pg.transform.smoothscale(pg.image.load('bullet.png').convert_alpha(), (10,10))
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.speed = 8
        self.pos = pg.math.Vector2(x, y)
        self.dir = pg.math.Vector2(dx, dy).normalize()

class Bullet(pg.sprite.Sprite):

    # [...]

     def update(self):

        self.pos += self.dir * self.speed
        self.rect.center = (round(self.pos.x), round(self.pos.y))

        if not self.rect.colliderect(0, 0, width, height):
            self.kill()

Python Pygame press two direction key and another key to shoot there's no bullet

By : user3428213

Date : March 29 2020, 07:55 AM

I hope this helps you . If you press UP + LEFT + SPACE then the SPACE key doesn't appear to be pressed immediately. You've to release the UP or LEFT key to get the pygame.KEYDOWN event for SPACE.
This is a known bug in pygame and doesn't seem to be solved yet: Incorrect handling of pressed keys #235