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use a named magic constant

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Kovid Goyal
2024-09-20 09:11:18 +05:30
parent cd3034cb67
commit 0cbccb4948
1 changed files with 2 additions and 2 deletions
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4
kitty/animation.c
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@@ -20,6 +20,7 @@ typedef struct StepsParameters {
static const double bezier_epsilon = 1e-7; static const double bezier_epsilon = 1e-7;
static const unsigned max_newton_iterations = 4; static const unsigned max_newton_iterations = 4;
static const unsigned max_bisection_iterations = 16;
typedef struct BezierParameters { typedef struct BezierParameters {
double ax, bx, cx, ay, by, cy, start_gradient, end_gradient, spline_samples[11]; double ax, bx, cx, ay, by, cy, start_gradient, end_gradient, spline_samples[11];
@@ -136,13 +137,12 @@ solve_curve_x(const BezierParameters *p, double x, double epsilon) {
// Fall back to the bisection method for reliability. // Fall back to the bisection method for reliability.
unsigned iteration = 0; unsigned iteration = 0;
while (t0 < t1 && iteration < 15u) { while (t0 < t1 && iteration++ < max_bisection_iterations) {
x2 = sample_curve_x(p, t2); x2 = sample_curve_x(p, t2);
if (fabs(x2 - x) < epsilon) return t2; if (fabs(x2 - x) < epsilon) return t2;
if (x > x2) t0 = t2; if (x > x2) t0 = t2;
else t1 = t2; else t1 = t2;
t2 = (t1 + t0) * .5; t2 = (t1 + t0) * .5;
++iteration;
} }
// Failure. // Failure.