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Standardize names of sparse fill-in pre-counting functions

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PiperOrigin-RevId: 712835830
Change-Id: I8e90dfa52af56ede917e1fd90b8d551898c244e5
This commit is contained in:
Yuval Tassa
2025-01-07 02:38:50 -08:00
committed by Copybara-Service
parent 0be7e6a1f6
commit 674d227050
5 changed files with 75 additions and 71 deletions
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src/engine/engine_core_constraint.c
+2 -2
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@@ -2175,8 +2175,8 @@ void mj_projectConstraint(const mjModel* m, mjData* d) {
mju_superSparse(nefc, rowsuper, rownnz, rowadr, colind); mju_superSparse(nefc, rowsuper, rownnz, rowadr, colind);
// AR = JM2 * JM2' // AR = JM2 * JM2'
mju_sqrMatTDSparseInit(d->efc_AR_rownnz, d->efc_AR_rowadr, nefc, rownnzT, mju_sqrMatTDSparseCount(d->efc_AR_rownnz, d->efc_AR_rowadr, nefc, rownnzT,
rowadrT, colindT, rownnz, rowadr, colind, rowsuper, d, /*flg_upper=*/1); rowadrT, colindT, rownnz, rowadr, colind, rowsuper, d, /*flg_upper=*/1);
mju_sqrMatTDSparse(d->efc_AR, JM2T, JM2, NULL, nv, nefc, mju_sqrMatTDSparse(d->efc_AR, JM2T, JM2, NULL, nv, nefc,
d->efc_AR_rownnz, d->efc_AR_rowadr, d->efc_AR_colind, d->efc_AR_rownnz, d->efc_AR_rowadr, d->efc_AR_colind,
src/engine/engine_solver.c
+5 -5
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@@ -1400,10 +1400,10 @@ static void MakeHessian(const mjModel* m, mjData* d, mjCGContext* ctx) {
} }
// initialize Hessian rowadr, rownnz // initialize Hessian rowadr, rownnz
mju_sqrMatTDSparseInit(ctx->H_rownnz, ctx->H_rowadr, nv, mju_sqrMatTDSparseCount(ctx->H_rownnz, ctx->H_rowadr, nv,
d->efc_J_rownnz, d->efc_J_rowadr, d->efc_J_colind, d->efc_J_rownnz, d->efc_J_rowadr, d->efc_J_colind,
d->efc_JT_rownnz, d->efc_JT_rowadr, d->efc_JT_colind, d->efc_JT_rowsuper, d->efc_JT_rownnz, d->efc_JT_rowadr, d->efc_JT_colind,
d, /*flg_upper=*/0); d->efc_JT_rowsuper, d, /*flg_upper=*/0);
// add nC to Hessian total nonzeros (unavoidable overcounting since H_colind is still unknown) // add nC to Hessian total nonzeros (unavoidable overcounting since H_colind is still unknown)
ctx->nH = m->nC + ctx->H_rowadr[nv - 1] + ctx->H_rownnz[nv - 1]; ctx->nH = m->nC + ctx->H_rowadr[nv - 1] + ctx->H_rownnz[nv - 1];
@@ -1440,7 +1440,7 @@ static void MakeHessian(const mjModel* m, mjData* d, mjCGContext* ctx) {
ctx->H_rownnz, ctx->H_rowadr, ctx->H_colind); ctx->H_rownnz, ctx->H_rowadr, ctx->H_colind);
// count total and row non-zeros of reverse-Cholesky factor L // count total and row non-zeros of reverse-Cholesky factor L
ctx->nL = mju_cholFactorNNZ(ctx->L_rownnz, HT_rownnz, HT_rowadr, HT_colind, nv, d); ctx->nL = mju_cholFactorCount(ctx->L_rownnz, HT_rownnz, HT_rowadr, HT_colind, nv, d);
mj_freeStack(d); mj_freeStack(d);
// compute L row adresses: rowadr = cumsum(rownnz) // compute L row adresses: rowadr = cumsum(rownnz)
src/engine/engine_util_sparse.c
+25 -21
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@@ -625,10 +625,10 @@ void mju_superSparse(int nr, int* rowsuper,
// precount res_rownnz and precompute res_rowadr for mju_sqrMatTDSparse // precount res_rownnz and precompute res_rowadr for mju_sqrMatTDSparse
void mju_sqrMatTDSparseInit(int* res_rownnz, int* res_rowadr, int nr, void mju_sqrMatTDSparseCount(int* res_rownnz, int* res_rowadr, int nr,
const int* rownnz, const int* rowadr, const int* colind, const int* rownnz, const int* rowadr, const int* colind,
const int* rownnzT, const int* rowadrT, const int* colindT, const int* rownnzT, const int* rowadrT, const int* colindT,
const int* rowsuperT, mjData* d, int flg_upper) { const int* rowsuperT, mjData* d, int flg_upper) {
mj_markStack(d); mj_markStack(d);
int* chain = mjSTACKALLOC(d, 2*nr, int); int* chain = mjSTACKALLOC(d, 2*nr, int);
int nchain = 0; int nchain = 0;
@@ -865,11 +865,11 @@ void mju_sqrMatTDSparse(mjtNum* res, const mjtNum* mat, const mjtNum* matT,
mj_freeStack(d); mj_freeStack(d);
} }
// compute row non-zeros of reverse-Cholesky factor L, return total non-zeros // precount row non-zeros of reverse-Cholesky factor L, return total non-zeros
// based on ldl_symbolic from 'Algorithm 8xx: a concise sparse Cholesky factorization package' // based on ldl_symbolic from 'Algorithm 8xx: a concise sparse Cholesky factorization package'
// note: reads pattern from upper triangle // reads pattern from upper triangle
int mju_cholFactorNNZ(int* L_rownnz, const int* rownnz, const int* rowadr, const int* colind, int mju_cholFactorCount(int* L_rownnz, const int* rownnz, const int* rowadr, const int* colind,
int n, mjData* d) { int n, mjData* d) {
mj_markStack(d); mj_markStack(d);
int* parent = mjSTACKALLOC(d, n, int); int* parent = mjSTACKALLOC(d, n, int);
int* flag = mjSTACKALLOC(d, n, int); int* flag = mjSTACKALLOC(d, n, int);
@@ -880,24 +880,28 @@ int mju_cholFactorNNZ(int* L_rownnz, const int* rownnz, const int* rowadr, const
flag[r] = r; flag[r] = r;
L_rownnz[r] = 1; // start with 1 for diagonal L_rownnz[r] = 1; // start with 1 for diagonal
// loop over non-zero columns // loop over non-zero columns of upper triangle
int start = rowadr[r]; int start = rowadr[r];
int end = start + rownnz[r]; int end = start + rownnz[r];
for (int c = start; c < end; c++) { for (int c = start; c < end; c++) {
int i = colind[c]; int i = colind[c];
if (i > r) {
// traverse from i to ancestor, stop when row is flagged
while (flag[i] != r) {
// if not yet set, set parent to current row
if (parent[i] == -1) {
parent[i] = r;
}
// increment non-zeros, flag row i, advance to parent // skip lower triangle
L_rownnz[i]++; if (i <= r) {
flag[i] = r; continue;
i = parent[i]; }
// traverse from i to ancestor, stop when row is flagged
while (flag[i] != r) {
// if not yet set, set parent to current row
if (parent[i] == -1) {
parent[i] = r;
} }
// increment non-zeros, flag row i, advance to parent
L_rownnz[i]++;
flag[i] = r;
i = parent[i];
} }
} }
} }
src/engine/engine_util_sparse.h
+7 -7
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@@ -99,17 +99,17 @@ MJAPI void mju_sqrMatTDSparse(mjtNum* res, const mjtNum* mat, const mjtNum* matT
mjData* d, int flg_upper); mjData* d, int flg_upper);
// precount res_rownnz and precompute res_rowadr for mju_sqrMatTDSparse // precount res_rownnz and precompute res_rowadr for mju_sqrMatTDSparse
MJAPI void mju_sqrMatTDSparseInit(int* res_rownnz, int* res_rowadr, int nr, MJAPI void mju_sqrMatTDSparseCount(int* res_rownnz, int* res_rowadr, int nr,
const int* rownnz, const int* rowadr, const int* colind, const int* rownnz, const int* rowadr, const int* colind,
const int* rownnzT, const int* rowadrT, const int* colindT, const int* rownnzT, const int* rowadrT, const int* colindT,
const int* rowsuperT, mjData* d, int flg_upper); const int* rowsuperT, mjData* d, int flg_upper);
// precompute res_rowadr for mju_sqrMatTDSparse using uncompressed memory // precompute res_rowadr for mju_sqrMatTDSparse using uncompressed memory
MJAPI void mju_sqrMatTDUncompressedInit(int* res_rowadr, int nc); MJAPI void mju_sqrMatTDUncompressedInit(int* res_rowadr, int nc);
// compute row non-zeros of reverse-Cholesky factor L, return total // precount row non-zeros of reverse-Cholesky factor L, return total
MJAPI int mju_cholFactorNNZ(int* L_rownnz, const int* rownnz, const int* rowadr, const int* colind, MJAPI int mju_cholFactorCount(int* L_rownnz, const int* rownnz, const int* rowadr,
int n, mjData* d); const int* colind, int n, mjData* d);
// ------------------------------ inlined functions ------------------------------------------------ // ------------------------------ inlined functions ------------------------------------------------
test/engine/engine_util_sparse_test.cc
+36 -36
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@@ -326,8 +326,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse1) {
int rowadrH[] = {0, 0, 0}; int rowadrH[] = {0, 0, 0};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3)); EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6));
@@ -371,8 +371,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse2) {
int rowadrH[] = {0, 0, 0}; int rowadrH[] = {0, 0, 0};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3)); EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6));
@@ -419,8 +419,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse3) {
mjtNum diag[] = {2, 3, 4}; mjtNum diag[] = {2, 3, 4};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(2, 2, 0)); EXPECT_THAT(rownnzH, ElementsAre(2, 2, 0));
EXPECT_THAT(rowadrH, ElementsAre(0, 2, 4)); EXPECT_THAT(rowadrH, ElementsAre(0, 2, 4));
@@ -467,8 +467,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse4) {
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(2, 0, 2)); EXPECT_THAT(rownnzH, ElementsAre(2, 0, 2));
EXPECT_THAT(rowadrH, ElementsAre(0, 2, 2)); EXPECT_THAT(rowadrH, ElementsAre(0, 2, 2));
@@ -513,8 +513,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse5) {
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 2, 2)); EXPECT_THAT(rownnzH, ElementsAre(3, 2, 2));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 5)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 5));
@@ -558,8 +558,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse6) {
int rowadrH[] = {0, 0, 0}; int rowadrH[] = {0, 0, 0};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(2, 1, 2)); EXPECT_THAT(rownnzH, ElementsAre(2, 1, 2));
EXPECT_THAT(rowadrH, ElementsAre(0, 2, 3)); EXPECT_THAT(rowadrH, ElementsAre(0, 2, 3));
@@ -605,8 +605,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse7) {
mjtNum diag[] = {2, 3, 4}; mjtNum diag[] = {2, 3, 4};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 2, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 2, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(2, 2)); EXPECT_THAT(rownnzH, ElementsAre(2, 2));
EXPECT_THAT(rowadrH, ElementsAre(0, 2)); EXPECT_THAT(rowadrH, ElementsAre(0, 2));
@@ -651,8 +651,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse8) {
mjtNum diag[] = {2, 3}; mjtNum diag[] = {2, 3};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 2, 2)); EXPECT_THAT(rownnzH, ElementsAre(3, 2, 2));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 5)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 5));
@@ -698,8 +698,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse9) {
mjtNum diag[] = {2, 3, 4}; mjtNum diag[] = {2, 3, 4};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, nullptr, data, 1); rownnzT, rowadrT, colindT, nullptr, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3)); EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6));
@@ -746,8 +746,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse10) {
mjtNum diag[] = {1, 1, 1}; mjtNum diag[] = {1, 1, 1};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, rowsuperT, data, 1); rownnzT, rowadrT, colindT, rowsuperT, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3)); EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6));
@@ -794,8 +794,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse11) {
mjtNum diag[] = {1, 1, 1}; mjtNum diag[] = {1, 1, 1};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 3, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 3, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, rowsuperT, data, 1); rownnzT, rowadrT, colindT, rowsuperT, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3)); EXPECT_THAT(rownnzH, ElementsAre(3, 3, 3));
EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6)); EXPECT_THAT(rowadrH, ElementsAre(0, 3, 6));
@@ -842,8 +842,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse12) {
mjtNum diag[] = {1, 1, 1}; mjtNum diag[] = {1, 1, 1};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 4, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 4, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, rowsuperT, data, 1); rownnzT, rowadrT, colindT, rowsuperT, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(4, 4, 4, 4)); EXPECT_THAT(rownnzH, ElementsAre(4, 4, 4, 4));
EXPECT_THAT(rowadrH, ElementsAre(0, 4, 8, 12)); EXPECT_THAT(rowadrH, ElementsAre(0, 4, 8, 12));
@@ -894,8 +894,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse13) {
mjtNum diag[] = {1, 1, 1}; mjtNum diag[] = {1, 1, 1};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 5, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 5, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, rowsuperT, data, 1); rownnzT, rowadrT, colindT, rowsuperT, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(2, 2, 0, 0, 0)); EXPECT_THAT(rownnzH, ElementsAre(2, 2, 0, 0, 0));
EXPECT_THAT(rowadrH, ElementsAre(0, 2, 4, 4, 4)); EXPECT_THAT(rowadrH, ElementsAre(0, 2, 4, 4, 4));
@@ -944,8 +944,8 @@ TEST_F(EngineUtilSparseTest, MjuSqrMatTDSparse14) {
int rowadrH[] = {0, 0, 0, 0, 0, 0, 0}; int rowadrH[] = {0, 0, 0, 0, 0, 0, 0};
// test precount // test precount
mju_sqrMatTDSparseInit(rownnzH, rowadrH, 7, rownnz, rowadr, colind, mju_sqrMatTDSparseCount(rownnzH, rowadrH, 7, rownnz, rowadr, colind,
rownnzT, rowadrT, colindT, rowsuperT, data, 1); rownnzT, rowadrT, colindT, rowsuperT, data, 1);
EXPECT_THAT(rownnzH, ElementsAre(7, 7, 7, 7, 7, 7, 7)); EXPECT_THAT(rownnzH, ElementsAre(7, 7, 7, 7, 7, 7, 7));
EXPECT_THAT(rowadrH, ElementsAre(0, 7, 14, 21, 28, 35, 42)); EXPECT_THAT(rowadrH, ElementsAre(0, 7, 14, 21, 28, 35, 42));
@@ -985,8 +985,8 @@ TEST_F(EngineUtilSparseTest, MjuCholFactorNNZ) {
int colindA[4]; int colindA[4];
int rownnzA_factor[2]; int rownnzA_factor[2];
mju_dense2sparse(sparseA, matA, nA, nA, rownnzA, rowadrA, colindA, 4); mju_dense2sparse(sparseA, matA, nA, nA, rownnzA, rowadrA, colindA, 4);
int nnzA = mju_cholFactorNNZ(rownnzA_factor, int nnzA = mju_cholFactorCount(rownnzA_factor,
rownnzA, rowadrA, colindA, nA, d); rownnzA, rowadrA, colindA, nA, d);
EXPECT_EQ(nnzA, 2); EXPECT_EQ(nnzA, 2);
EXPECT_THAT(AsVector(rownnzA_factor, 2), ElementsAre(1, 1)); EXPECT_THAT(AsVector(rownnzA_factor, 2), ElementsAre(1, 1));
@@ -1001,8 +1001,8 @@ TEST_F(EngineUtilSparseTest, MjuCholFactorNNZ) {
int colindB[9]; int colindB[9];
int rownnzB_factor[3]; int rownnzB_factor[3];
mju_dense2sparse(sparseB, matB, nB, nB, rownnzB, rowadrB, colindB, 9); mju_dense2sparse(sparseB, matB, nB, nB, rownnzB, rowadrB, colindB, 9);
int nnzB = mju_cholFactorNNZ(rownnzB_factor, int nnzB = mju_cholFactorCount(rownnzB_factor,
rownnzB, rowadrB, colindB, nB, d); rownnzB, rowadrB, colindB, nB, d);
EXPECT_EQ(nnzB, 5); EXPECT_EQ(nnzB, 5);
EXPECT_THAT(AsVector(rownnzB_factor, 3), ElementsAre(1, 2, 2)); EXPECT_THAT(AsVector(rownnzB_factor, 3), ElementsAre(1, 2, 2));
@@ -1017,8 +1017,8 @@ TEST_F(EngineUtilSparseTest, MjuCholFactorNNZ) {
int colindC[9]; int colindC[9];
int rownnzC_factor[3]; int rownnzC_factor[3];
mju_dense2sparse(sparseC, matC, nC, nC, rownnzC, rowadrC, colindC, 9); mju_dense2sparse(sparseC, matC, nC, nC, rownnzC, rowadrC, colindC, 9);
int nnzC = mju_cholFactorNNZ(rownnzC_factor, int nnzC = mju_cholFactorCount(rownnzC_factor,
rownnzC, rowadrC, colindC, nC, d); rownnzC, rowadrC, colindC, nC, d);
EXPECT_EQ(nnzC, 4); EXPECT_EQ(nnzC, 4);
EXPECT_THAT(AsVector(rownnzC_factor, 3), ElementsAre(1, 2, 1)); EXPECT_THAT(AsVector(rownnzC_factor, 3), ElementsAre(1, 2, 1));
@@ -1034,8 +1034,8 @@ TEST_F(EngineUtilSparseTest, MjuCholFactorNNZ) {
int colindD[16]; int colindD[16];
int rownnzD_factor[4]; int rownnzD_factor[4];
mju_dense2sparse(sparseD, matD, nD, nD, rownnzD, rowadrD, colindD, 16); mju_dense2sparse(sparseD, matD, nD, nD, rownnzD, rowadrD, colindD, 16);
int nnzD = mju_cholFactorNNZ(rownnzD_factor, int nnzD = mju_cholFactorCount(rownnzD_factor,
rownnzD, rowadrD, colindD, nD, d); rownnzD, rowadrD, colindD, nD, d);
EXPECT_EQ(nnzD, 8); EXPECT_EQ(nnzD, 8);
EXPECT_THAT(AsVector(rownnzD_factor, 4), ElementsAre(1, 2, 2, 3)); EXPECT_THAT(AsVector(rownnzD_factor, 4), ElementsAre(1, 2, 2, 3));