Fix bug in integrate_add_tensor_product_value_and_gradient_linear()

diff --git a/include/deal.II/matrix_free/tensor_product_kernels.h b/include/deal.II/matrix_free/tensor_product_kernels.h
index 1c13afb9bf2ee2146a5b953bc400597f4b6cb9e8..29af641639a368f04fc8a0b09e6920e246dd47e4 100644 (file)
--- a/include/deal.II/matrix_free/tensor_product_kernels.h
+++ b/include/deal.II/matrix_free/tensor_product_kernels.h
@@ -3613,8 +3613,8 @@ namespace internal
       {
         const auto x0 = 1. - p[0], x1 = p[0];
 
-        values[0] = value * x0 - gradient[0];
-        values[1] = value * x1 + gradient[0];
+        values[0] += value * x0 - gradient[0];
+        values[1] += value * x1 + gradient[0];
       }
     else if (dim == 2)
       {

diff --git a/tests/matrix_free/point_evaluation_22.cc b/tests/matrix_free/point_evaluation_22.cc
index 816e7c16ce0fe46dda47109f7d31714ba0d622c7..bf4480a202d7462e754b404b94240aa329c27949 100644 (file)
--- a/tests/matrix_free/point_evaluation_22.cc
+++ b/tests/matrix_free/point_evaluation_22.cc
@@ -164,6 +164,7 @@ main()
   initlog();
   deallog << std::setprecision(10);
 
+  test<1>(1);
   test<1>(3);
   test<2>(1);
   test<2>(2);

diff --git a/tests/matrix_free/point_evaluation_22.output b/tests/matrix_free/point_evaluation_22.output
index 605e73e5c556c764b2b29ef206f586a53cfa36dd..2cf39e2ec53de28968e0326f4edbb5da48c91b5f 100644 (file)
--- a/tests/matrix_free/point_evaluation_22.output
+++ b/tests/matrix_free/point_evaluation_22.output
@@ -1,20 +1,53 @@
 
-DEAL::Mapping of degree 3
+DEAL::Mapping of degree 1
 DEAL::Cell with center 0.2500000000
-DEAL::0.000000000: 0.000000000 error value 0.000000000 error grad 4.440892099e-16
+DEAL::0.000000000: 0.000000000 error value 0.000000000 error grad 0.000000000
 DEAL::0.02941176471: 0.02941176471 error value 0.000000000 error grad 0.000000000
-DEAL::0.05882352941: 0.05882352941 error value -6.938893904e-18 error grad 2.220446049e-16
+DEAL::0.05882352941: 0.05882352941 error value 0.000000000 error grad 0.000000000
 DEAL::0.08823529412: 0.08823529412 error value 0.000000000 error grad 0.000000000
-DEAL::0.1176470588: 0.1176470588 error value 1.387778781e-17 error grad 2.220446049e-16
-DEAL::0.1470588235: 0.1470588235 error value 2.775557562e-17 error grad 3.330669074e-16
+DEAL::0.1176470588: 0.1176470588 error value 0.000000000 error grad 0.000000000
+DEAL::0.1470588235: 0.1470588235 error value 0.000000000 error grad 0.000000000
 DEAL::0.1764705882: 0.1764705882 error value 0.000000000 error grad 0.000000000
-DEAL::0.2058823529: 0.2058823529 error value -2.775557562e-17 error grad 1.110223025e-16
-DEAL::0.2352941176: 0.2352941176 error value 0.000000000 error grad 1.110223025e-16
-DEAL::0.2647058824: 0.2647058824 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.2058823529: 0.2058823529 error value 0.000000000 error grad 0.000000000
+DEAL::0.2352941176: 0.2352941176 error value 0.000000000 error grad 0.000000000
+DEAL::0.2647058824: 0.2647058824 error value 0.000000000 error grad 0.000000000
 DEAL::0.2941176471: 0.2941176471 error value 0.000000000 error grad 0.000000000
 DEAL::0.3235294118: 0.3235294118 error value 0.000000000 error grad 0.000000000
 DEAL::0.3529411765: 0.3529411765 error value 0.000000000 error grad 0.000000000
 DEAL::
+DEAL::-24.83044983 27.12456747 
+DEAL::Cell with center 0.7500000000
+DEAL::0.5000000000: 0.5000000000 error value 0.000000000 error grad 0.000000000
+DEAL::0.5294117647: 0.5294117647 error value 0.000000000 error grad 0.000000000
+DEAL::0.5588235294: 0.5588235294 error value 0.000000000 error grad 0.000000000
+DEAL::0.5882352941: 0.5882352941 error value 0.000000000 error grad 0.000000000
+DEAL::0.6176470588: 0.6176470588 error value 0.000000000 error grad 0.000000000
+DEAL::0.6470588235: 0.6470588235 error value 0.000000000 error grad 0.000000000
+DEAL::0.6764705882: 0.6764705882 error value 0.000000000 error grad 0.000000000
+DEAL::0.7058823529: 0.7058823529 error value 0.000000000 error grad 0.000000000
+DEAL::0.7352941176: 0.7352941176 error value 0.000000000 error grad 0.000000000
+DEAL::0.7647058824: 0.7647058824 error value 0.000000000 error grad 0.000000000
+DEAL::0.7941176471: 0.7941176471 error value 0.000000000 error grad 0.000000000
+DEAL::0.8235294118: 0.8235294118 error value 0.000000000 error grad 0.000000000
+DEAL::0.8529411765: 0.8529411765 error value 0.000000000 error grad 0.000000000
+DEAL::
+DEAL::-20.62456747 29.41868512 
+DEAL::Mapping of degree 3
+DEAL::Cell with center 0.2500000000
+DEAL::0.000000000: 0.000000000 error value 0.000000000 error grad 0.000000000
+DEAL::0.02941176471: 0.02941176471 error value 0.000000000 error grad 0.000000000
+DEAL::0.05882352941: 0.05882352941 error value -1.387778781e-17 error grad 0.000000000
+DEAL::0.08823529412: 0.08823529412 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.1176470588: 0.1176470588 error value 1.387778781e-17 error grad 2.220446049e-16
+DEAL::0.1470588235: 0.1470588235 error value 0.000000000 error grad 0.000000000
+DEAL::0.1764705882: 0.1764705882 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.2058823529: 0.2058823529 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.2352941176: 0.2352941176 error value 2.775557562e-17 error grad 0.000000000
+DEAL::0.2647058824: 0.2647058824 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.2941176471: 0.2941176471 error value 0.000000000 error grad 0.000000000
+DEAL::0.3235294118: 0.3235294118 error value 0.000000000 error grad 2.220446049e-16
+DEAL::0.3529411765: 0.3529411765 error value -5.551115123e-17 error grad 2.220446049e-16
+DEAL::
 DEAL::-40.02339531 1.555249578 8.779994658 31.98226872 
 DEAL::Cell with center 0.7500000000
 DEAL::0.5000000000: 0.5000000000 error value 0.000000000 error grad 5.551115123e-16