In most other places in the code I think you'd see this written differently - like the following:

`glColor3f(skinColor[0] + _joint[b].touchForce * 0.3f,`
`              skinColor[1] - _joint[b].touchForce * 0.2f,`
`              skinColor[2] - _joint[b].touchForce * 0.1f);`