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#include <cmath>
#include <hyprutils/animation/BezierCurve.hpp>
#include <gtest/gtest.h>
using Hyprutils::Animation::CBezierCurve;
using Hyprutils::Math::Vector2D;
static void test_nonmonotonic4_clamps_out_of_range() {
// Non-monotonic curve in X
// This used to drive the step-halving search to OOB. It should now clamp
CBezierCurve curve;
std::array<Vector2D, 4> pts = {
Vector2D{0.5f, 1.0f}, // P0
Vector2D{1.0f, 1.0f}, // P1
Vector2D{0.0f, 0.0f}, // P2
Vector2D{0.5f, 0.0f} // P3
};
curve.setup4(pts);
// x > last baked x
EXPECT_EQ(std::isfinite(curve.getYForPoint(0.6f)), true);
// Far beyond range
EXPECT_EQ(std::isfinite(curve.getYForPoint(std::numeric_limits<float>::max())), true);
EXPECT_EQ(std::isfinite(curve.getYForPoint(-std::numeric_limits<float>::max())), true);
}
static void test_adjacent_baked_x_equal() {
// Curve with flat tail (X=1, Y=1)
CBezierCurve curve;
std::array<Vector2D, 4> pts = {
Vector2D{0.0f, 0.0f}, // P0
Vector2D{0.2f, 0.2f}, // P1
Vector2D{1.0f, 1.0f}, // P2
Vector2D{1.0f, 1.0f} // P3
};
curve.setup4(pts);
// Exactly at last baked X
const float y_at_end = curve.getYForPoint(1.0f);
// Slightly beyond last baked X
const float y_past_end = curve.getYForPoint(1.0001f);
EXPECT_EQ(y_at_end, 1.0f);
EXPECT_EQ(y_past_end, y_at_end);
}
static void test_all_baked_x_equal() {
// Extreme case: X is constant along the whole curve
CBezierCurve curve;
std::array<Vector2D, 4> pts = {
Vector2D{0.0f, 0.0f}, // P0
Vector2D{0.0f, 0.3f}, // P1
Vector2D{0.0f, 0.7f}, // P2
Vector2D{0.0f, 1.0f} // P3
};
curve.setup4(pts);
// Below any baked X
const float y_lo = curve.getYForPoint(-100.0f);
const float y_0 = curve.getYForPoint(0.0f);
// Above any baked X
const float y_hi = curve.getYForPoint(100.0f);
EXPECT_EQ(std::isfinite(y_lo), true);
EXPECT_EQ(std::isfinite(y_0), true);
EXPECT_EQ(std::isfinite(y_hi), true);
// For this curve Y should stay within [0,1]
EXPECT_EQ((y_lo >= 0.0f && y_lo <= 1.0f), true);
EXPECT_EQ((y_0 >= 0.0f && y_0 <= 1.0f), true);
EXPECT_EQ((y_hi >= 0.0f && y_hi <= 1.0f), true);
}
TEST(Animation, beziercurve) {
test_nonmonotonic4_clamps_out_of_range();
test_adjacent_baked_x_equal();
test_all_baked_x_equal();
}
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