rpipe 2[mm] Light pipe radius
L1 20[mm] Length of straight section 1
rb1 10[mm] Radius of curvature, bend 1
theta1 30[deg] Bend angle 1
L2 25[mm] Length of straight section 2
rb2 20[mm] Radius of curvature, bend 2
theta2 90[deg] Bend angle 2
L3 10[mm] Length of straight section 3
x0 0 LED location, x-component
y0 0 LED location, y-component
z0 0 LED location, z-component
xc1 x0-rb1 Center of curvature of bend 1, x-component
yc1 y0 Center of curvature of bend 1, y-component
zc1 z0+L1 Center of curvature of bend 1, z-component
xL2 xc1+rb1*cos(theta1) Start of straight section 2, x-component
yL2 yc1 Start of straight section 2, y-component
zL2 zc1+rb1*sin(theta1) Start of straight section 2, z-component
xc2 xL2-L2*sin(theta1)+rb2*cos(theta1) Center of curvature of bend 2, x-component
yc2 yL2 Center of curvature of bend 2, y-component
zc2 zL2+L2*cos(theta1)+rb2*sin(theta1) Center of curvature of bend 2, z-component
xL3 xc2-rb2*cos(theta2-theta1) Start of straight section 3, x-component
yL3 yc2 Start of straight section 3, y-component
zL3 zc2+rb2*sin(theta2-theta1) Start of straight section 3, z-component