Fig. 1
From: Efficient object location determination and error analysis based on barycentric coordinates
Barycentric coordinates of point p inside the tetrahedron abcd. In the figure, r = (1 – 0.4)a + 0.4b, q = (1 – 0.5)r + 0.5c, and p = (1 – 0.6q) + 0.6d. Using the computation method proposed below to obtain t, u, v, and w barycentric coordinates of p, we get that p = 0.12a + 0.08b + 0.2c + 0.6d