Pygame碰撞器提供了比Pygame模块标准的Rect矩形碰撞检测更复杂的功能。
虽然名字是Pygame碰撞器，但它并不和Pygame模块绑定，即不依赖于Pygame模块，
也和Pygame模块没啥关系。你尽管应用它于tkinter模块或其它地方。
安装这个模块的方法是在命令提示符下输入 pip install pygame-colliders 进行安装。
这个库提供了两种碰撞器，一个是convex即凸边形碰撞器，另一种是concave凹边形碰撞器。
下面是一个例子
collider_a_points = [(13, 10), (13, 3), (6, 3), (6, 10)]
collider_a = create_collider(collider_points) # 创建碰撞器
collider_b_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)]
collider_b = create_collider(collider_points)
if collider_a.collide(collider_b):
print("Collision detected")
上面的程序没有指定是使用哪种碰撞器。下面的代码指定了凸碰撞器。
collider_points = [(13, 10), (13, 3), (6, 3), (6, 10)] collider = ConvexCollider(collider_points)
凹边形是一个或者多个内角大于180度的多边形。它可以分解为多个凸边形。
如果实例化凹碰撞器，最终也是调用凸边形的碰撞检测。下面是创建一个凹碰撞器。
collider_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)] collider = ConcaveCollider(collider_points)
上面的代码会创建一像C形状的碰撞器。
下面是test程序：
from pygame_colliders import ConcaveCollider, ConvexCollider
def test_no_collision():
poly_a_points = [(13, 10), (13, 3), (6, 3), (6, 10)]
poly_b_points = [(14, 18), (15, 11), (10, 13)]
poly_a = ConvexCollider(poly_a_points)
poly_b = ConvexCollider(poly_b_points)
assert poly_a.collide(poly_b) is False
def test_collision_2():
collider_a_points = [(13, 20), (13, 13), (6, 13), (6, 20)]
collider_b_points = [(13, 13), (8, 9), (7, 15)]
collider_a = ConvexCollider(collider_a_points)
collider_b = ConvexCollider(collider_b_points)
assert collider_a.collide(collider_b) is True
def test_collision():
poly_a = [(11, 10), (11, 3), (4, 3), (4, 10)]
poly_b = [(13, 13), (8, 9), (7, 15)]
p_a = ConvexCollider(poly_a)
p_b = ConvexCollider(poly_b)
assert p_a.collide(p_b) is True
def test_clockwise():
poly = [(13, 13), (8, 9), (7, 15)]
p = ConvexCollider(poly)
assert p.is_clockwise is True
def test_counter_clockwise():
poly = [(7, 15), (8, 9), (13, 13)]
p = ConvexCollider(poly)
assert p.is_clockwise is False
def test_point_collide():
poly_points = [(7, 15), (8, 9), (13, 13)]
point = (10, 12)
poly = ConvexCollider(poly_points)
assert poly.point_collide(point) is True
def test_point_not_collide():
poly_points = [(7, 15), (8, 9), (13, 13)]
point = (10, 7)
poly = ConvexCollider(poly_points)
assert poly.point_collide(point) is False
def test_concave_convex_collision():
poly_a_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)]
poly_b_points = [(4.5, 3.5), (6, 2), (6, 4)]
poly_a = ConcaveCollider(poly_a_points)
poly_b = ConvexCollider(poly_b_points)
assert poly_a.collide(poly_b) is True
def test_convex_concave_collision():
poly_a_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)]
poly_b_points = [(4.5, 3.5), (6, 2), (6, 4)]
poly_a = ConcaveCollider(poly_a_points)
poly_b = ConvexCollider(poly_b_points)
assert poly_b.collide(poly_a) is True
def test_concave_no_collision():
poly_a_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)]
poly_b_points = [(6.5, 3.5), (8, 2), (8, 4)]
poly_a = ConcaveCollider(poly_a_points)
poly_b = ConvexCollider(poly_b_points)
assert poly_a.collide(poly_b) is False
def test_concave_concave_collision():
poly_a_points = [(3, 3), (5, 3), (5, 4), (4, 4), (4, 5), (5, 5), (5, 6), (3, 6)]
poly_b_points = [(6.5, 5.5), (4.5, 5.5), (4.5, 6.5), (5.5, 6.5), (5.5, 7.5), (4.5, 7.5), (4.5, 8.5), (6.5, 8.5)]
poly_a = ConcaveCollider(poly_a_points)
poly_b = ConcaveCollider(poly_b_points)
assert poly_a.collide(poly_b) is True
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