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demo: Add a test for interaction between lock flags & seams

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This test would fail before, specifically lock2 would not lock the spine
because it was using the side of the spine with larger vertex indices;
after the previous fix lock2 and lock3 are equivalent.
This commit is contained in:
Arseny Kapoulkine
2024-10-02 11:11:33 -07:00
parent 737c2697e0
commit 91ff05480e
1 changed files with 73 additions and 0 deletions
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demo/tests.cpp
+73
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@@ -1221,6 +1221,78 @@ static void simplifyLockFlags()
assert(memcmp(ib, expected, sizeof(expected)) == 0);
}
static void simplifyLockFlagsSeam()
{
float vb[] = {
0, 0, 0,
0, 1, 0,
0, 1, 0,
0, 2, 0,
1, 0, 0,
1, 1, 0,
1, 1, 0,
1, 2, 0,
2, 0, 0,
2, 1, 0,
2, 1, 0,
2, 2, 0, // clang-format :-/
};
unsigned char lock0[12] = {
1, 0, 0, 1,
0, 0, 0, 0,
1, 0, 0, 1, // clang-format :-/
};
unsigned char lock1[12] = {
1, 0, 0, 1,
1, 0, 0, 1,
1, 0, 0, 1, // clang-format :-/
};
unsigned char lock2[12] = {
1, 0, 1, 1,
1, 0, 1, 1,
1, 0, 1, 1, // clang-format :-/
};
unsigned char lock3[12] = {
1, 1, 0, 1,
1, 1, 0, 1,
1, 1, 0, 1, // clang-format :-/
};
// 0 1-2 3
// 4 5-6 7
// 8 9-10 11
unsigned int ib[] = {
0, 1, 4,
4, 1, 5,
4, 5, 8,
8, 5, 9,
2, 3, 6,
6, 3, 7,
6, 7, 10,
10, 7, 11, // clang-format :-/
};
unsigned int res[24];
// with no locks, we should be able to collapse the entire mesh (vertices 1-2 and 9-10 are locked but others can move towards them)
assert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, NULL, 0, 1.f, 0) == 0);
// with corners locked, we should get two quads
assert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock0, 0, 1.f, 0) == 12);
// with both sides locked, we can only collapse the seam spine
assert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock1, 0, 1.f, 0) == 18);
// with seam spine locked, we can collapse nothing; note that we intentionally test two different lock configurations
// they each lock only one side of the seam spine, which should be equivalent
assert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock2, 0, 1.f, 0) == 24);
assert(meshopt_simplifyWithAttributes(res, ib, 24, vb, 12, 12, NULL, 0, NULL, 0, lock3, 0, 1.f, 0) == 24);
}
static void simplifySparse()
{
float vb[] = {
@@ -1774,6 +1846,7 @@ void runTests()
simplifyAttr(/* skip_g= */ false);
simplifyAttr(/* skip_g= */ true);
simplifyLockFlags();
simplifyLockFlagsSeam();
simplifySparse();
simplifyErrorAbsolute();
simplifySeam();