Midpoint coordinate calculator between two points in three-dimensional space

X1: Y1: Z1:
X2: Y2: Z2:
中点

公式：

空间中两点P1(x1，y1，z1)、P2(x2，y2，z2)，中点P坐标[（x1+x2）/2,(y1+y2)/2,(z1+z2)/2