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Recognize more linear bezier curves

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Kovid Goyal 2024-07-17 17:41:47 +05:30
parent 39dfa75fe7
commit 9c75ea795d
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GPG key ID: 06BC317B515ACE7C
2 changed files with 20 additions and 5 deletions
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12
kitty/animation.c
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@ -194,10 +194,20 @@ init_function(Animation *a, double y_at_start, double y_at_end, easing_curve cur
return f;
}
static bool
is_bezier_linear(double p1x, double p1y, double p2x, double p2y) {
return (
(p1x == 0 && p1y == 0 && p2x == 1 && p2y == 1) ||
(p1x == 0 && p1y == 0 && p2x == 0 && p2y == 0) ||
(p1x == 1 && p1y == 1 && p2x == 1 && p2y == 1) ||
(p1x != 0 && p2x != 0 && p1y != 0 && p2y != 0 && p1y / p1x == p2y / p2x)
);
}
void
add_cubic_bezier_animation(Animation *a, double y_at_start, double y_at_end, double p1x, double p1y, double p2x, double p2y) {
p1x = unit_value(p1x); p2x = unit_value(p2x);
if (p1x == 0 && p1y == 0 && p2x == 1 && p2y == 1) {
if (is_bezier_linear(p1x, p1y, p2x, p2y)) {
init_function(a, y_at_start, y_at_end, identity_easing_curve);
return;
}

13
kitty_tests/options.py
View file

@ -157,16 +157,21 @@ def cb(src, interval=-1, first=EasingFunction(), second=EasingFunction()):
cb('linear(0, 0.25 25% 75%, 1)', first=EasingFunction('linear', linear_x=(0.0, 0.25, 0.75, 1.0), linear_y=(0, 0.25, 0.25, 1.0)))
# test that easing functions give expected values
def ef(spec, tests, duration=0.5):
def ef(spec, tests, duration=0.5, accuracy=0):
cfv = p('cursor_blink_interval ' + spec).cursor_blink_interval
self.set_options({'cursor_blink_interval': cfv})
for t, expected in tests.items():
actual = test_cursor_blink_easing_function(t, duration)
self.ae(expected, actual, f'Failed for {spec=} with {t=}: {expected} != {actual}')
if abs(actual - expected) > accuracy:
self.ae(expected, actual, f'Failed for {spec=} with {t=}: {expected} != {actual}')
ef('linear(0, 0.25 25% 75%, 1)', {0: 0, 0.25: 0.25, 0.3: 0.25, 0.75: 0.25, 1:1})
for spec in ('linear', 'linear(0, 1)'):
ef(spec, {0: 0, 1: 1, 0.1234: 0.1234, 0.6453: 0.6453})
linear_vals = {0: 0, 1: 1, 0.1234: 0.1234, 0.6453: 0.6453}
for spec in ('linear', 'linear(0, 1)', 'cubic-bezier(0, 0, 1, 1)', 'cubic-bezier(0.2, 0.2, 0.7, 0.7)'):
ef(spec, linear_vals)
# test an almost linear function to test cubic bezier implementation
ef('cubic-bezier(0.2, 0.2, 0.7, 0.71)', linear_vals, accuracy=0.01)
ef('cubic-bezier(0.23, 0.2, 0.7, 0.71)', linear_vals, accuracy=0.01)
ef('steps(5)', {0: 0, 0.1: 0, 0.3: 0.2, 0.9:0.8})
ef('steps(5, start)', {0: 0.2, 0.1: 0.2, 0.3: 0.4, 0.9:1})