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test/source/blender/blenkernel/intern/fcurve_test.cc
Sybren A. Stüvel 56aa5b0d8c T73268: Link C/C++ unit tests into single executable 
This commit introduces a new way to build unit tests. It is now possible
for each module to generate its own test library. The tests in these
libraries are then bundled into a single executable.

The test executable can be run with `ctest`. Even though the tests
reside in a single executable, they are still exposed as individual
tests to `ctest`, and thus can be selected via its `-R` argument.

Not yet ported tests still build & run as before.

The following rules apply:

- Test code should reside in the same directory as the code under test.
- Tests that target functionality in `somefile.{c,cc}` should reside in
  `somefile_test.cc`.
- The namespace for tests is the `tests` sub-namespace of the code under
  test. For example, tests for `blender::bke` should be in
  `blender::bke:tests`.
- The test files should be listed in the module's `CMakeLists.txt` in a
  `blender_add_test_lib()` call. See the `blenkernel` module for an
  example.

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D7649
2020-07-16 12:58:49 +02:00

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2020 by Blender Foundation.
*/
#include "testing/testing.h"
#include "MEM_guardedalloc.h"
extern "C" {
#include "BKE_fcurve.h"
#include "ED_keyframing.h"
#include "DNA_anim_types.h"
}
namespace blender::bke::tests {
// Epsilon for floating point comparisons.
static const float EPSILON = 1e-7f;
TEST(evaluate_fcurve, EmptyFCurve)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(evaluate_fcurve(fcu, 47.0f), 0.0f);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, OnKeys)
{
FCurve *fcu = BKE_fcurve_create();
insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF);
insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF);
insert_vert_fcurve(fcu, 3.0f, 19.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.0f), 7.0f, EPSILON); // hits 'on or before first' function
EXPECT_NEAR(evaluate_fcurve(fcu, 2.0f), 13.0f, EPSILON); // hits 'between' function
EXPECT_NEAR(evaluate_fcurve(fcu, 3.0f), 19.0f, EPSILON); // hits 'on or after last' function
/* Also test within a specific time epsilon of the keys, as this was an issue in T39207.
* This epsilon is just slightly smaller than the epsilon given to binarysearch_bezt_index_ex()
* in fcurve_eval_between_keyframes(), so it should hit the "exact" code path. */
float time_epsilon = 0.00008f;
EXPECT_NEAR(evaluate_fcurve(fcu, 2.0f - time_epsilon), 13.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 2.0f + time_epsilon), 13.0f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, InterpolationConstant)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
fcu->bezt[0].ipo = BEZT_IPO_CONST;
fcu->bezt[1].ipo = BEZT_IPO_CONST;
EXPECT_NEAR(evaluate_fcurve(fcu, 1.25f), 7.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.50f), 7.0f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, InterpolationLinear)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
fcu->bezt[0].ipo = BEZT_IPO_LIN;
fcu->bezt[1].ipo = BEZT_IPO_LIN;
EXPECT_NEAR(evaluate_fcurve(fcu, 1.25f), 8.5f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.50f), 10.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.75f), 11.5f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, InterpolationBezier)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
EXPECT_EQ(fcu->bezt[0].ipo, BEZT_IPO_BEZ);
EXPECT_EQ(fcu->bezt[1].ipo, BEZT_IPO_BEZ);
// Test with default handles.
EXPECT_NEAR(evaluate_fcurve(fcu, 1.25f), 7.8297067f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.50f), 10.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.75f), 12.170294f, EPSILON);
// Test with modified handles.
fcu->bezt[0].vec[0][0] = 0.71855f; // left handle X
fcu->bezt[0].vec[0][1] = 6.22482f; // left handle Y
fcu->bezt[0].vec[2][0] = 1.35148f; // right handle X
fcu->bezt[0].vec[2][1] = 7.96806f; // right handle Y
fcu->bezt[1].vec[0][0] = 1.66667f; // left handle X
fcu->bezt[1].vec[0][1] = 10.4136f; // left handle Y
fcu->bezt[1].vec[2][0] = 2.33333f; // right handle X
fcu->bezt[1].vec[2][1] = 15.5864f; // right handle Y
EXPECT_NEAR(evaluate_fcurve(fcu, 1.25f), 7.945497f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.50f), 9.3495407f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.75f), 11.088551f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, InterpolationBounce)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
fcu->bezt[0].ipo = BEZT_IPO_BOUNCE;
fcu->bezt[1].ipo = BEZT_IPO_BOUNCE;
fcu->bezt[0].easing = BEZT_IPO_EASE_IN;
fcu->bezt[1].easing = BEZT_IPO_EASE_AUTO;
EXPECT_NEAR(evaluate_fcurve(fcu, 1.4f), 8.3649998f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.5f), 8.4062500f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 1.8f), 11.184999f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, ExtrapolationLinearKeys)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
fcu->bezt[0].ipo = BEZT_IPO_LIN;
fcu->bezt[1].ipo = BEZT_IPO_LIN;
fcu->extend = FCURVE_EXTRAPOLATE_LINEAR;
// Before first keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 0.75f), 5.5f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 0.50f), 4.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, -1.50f), -8.0f, EPSILON);
// After last keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 2.75f), 17.5f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 3.50f), 22.0f, EPSILON);
fcu->extend = FCURVE_EXTRAPOLATE_CONSTANT;
// Before first keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 0.75f), 7.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, -1.50f), 7.0f, EPSILON);
// After last keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 2.75f), 13.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 3.50f), 13.0f, EPSILON);
BKE_fcurve_free(fcu);
}
TEST(evaluate_fcurve, ExtrapolationBezierKeys)
{
FCurve *fcu = BKE_fcurve_create();
EXPECT_EQ(insert_vert_fcurve(fcu, 1.0f, 7.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 0);
EXPECT_EQ(insert_vert_fcurve(fcu, 2.0f, 13.0f, BEZT_KEYTYPE_KEYFRAME, INSERTKEY_NO_USERPREF), 1);
fcu->bezt[0].vec[0][0] = 0.71855f; // left handle X
fcu->bezt[0].vec[0][1] = 6.22482f; // left handle Y
fcu->bezt[0].vec[2][0] = 1.35148f; // right handle X
fcu->bezt[0].vec[2][1] = 7.96806f; // right handle Y
fcu->bezt[1].vec[0][0] = 1.66667f; // left handle X
fcu->bezt[1].vec[0][1] = 10.4136f; // left handle Y
fcu->bezt[1].vec[2][0] = 2.33333f; // right handle X
fcu->bezt[1].vec[2][1] = 15.5864f; // right handle Y
fcu->extend = FCURVE_EXTRAPOLATE_LINEAR;
// Before first keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 0.75f), 6.3114409f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, -0.50f), 2.8686447f, EPSILON);
// After last keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 2.75f), 18.81946f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 3.50f), 24.63892f, EPSILON);
fcu->extend = FCURVE_EXTRAPOLATE_CONSTANT;
// Before first keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 0.75f), 7.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, -1.50f), 7.0f, EPSILON);
// After last keyframe.
EXPECT_NEAR(evaluate_fcurve(fcu, 2.75f), 13.0f, EPSILON);
EXPECT_NEAR(evaluate_fcurve(fcu, 3.50f), 13.0f, EPSILON);
BKE_fcurve_free(fcu);
}
} // namespace blender::bke::tests
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