| // included by QuadraticParameterization.cpp |
| // accesses internal functions to validate parameterized coefficients |
| |
| #include "Parameterization_Test.h" |
| |
| bool point_on_parameterized_curve(const Quadratic& quad, const _Point& point) { |
| double coeffs[coeff_count]; |
| implicit_coefficients(quad, coeffs); |
| double xx = coeffs[ xx_coeff] * point.x * point.x; |
| double xy = coeffs[ xy_coeff] * point.x * point.y; |
| double yy = coeffs[ yy_coeff] * point.y * point.y; |
| double x = coeffs[ x_coeff] * point.x; |
| double y = coeffs[ y_coeff] * point.y; |
| double c = coeffs[ c_coeff]; |
| double sum = xx + xy + yy + x + y + c; |
| return approximately_zero(sum); |
| } |