barycentric_xy()

bool fl::colorimetric_response::barycentric_xy ( const float t[2], const float A[2], const float B[2], const float C[2], float bary[3] )

inline

Definition at line 171 of file colorimetric_response.h.

                                                                         {
    const float v0x = B[0] - A[0], v0y = B[1] - A[1];
    const float v1x = C[0] - A[0], v1y = C[1] - A[1];
    const float v2x = t[0] - A[0], v2y = t[1] - A[1];
    const float d00 = v0x * v0x + v0y * v0y;
    const float d01 = v0x * v1x + v0y * v1y;
    const float d11 = v1x * v1x + v1y * v1y;
    const float d20 = v2x * v0x + v2y * v0y;
    const float d21 = v2x * v1x + v2y * v1y;
    const float den = d00 * d11 - d01 * d01;
    if (fl::fabs(den) < 1e-20f) {
        return false;
    }
    const float inv_den = 1.0f / den;
    const float u = (d11 * d20 - d01 * d21) * inv_den;
    const float v = (d00 * d21 - d01 * d20) * inv_den;
    bary[0] = 1.0f - u - v;
    bary[1] = u;
    bary[2] = v;
    return true;
}

References fl::B, fl::fabs(), fl::FL_NO_EXCEPT, and fl::t.

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