add heat equation example with video output

examples/CMakeLists.txt

@@ -21,6 +21,7 @@ set(EXAMPLES_LIST
     custom-matrix-format
     custom-stopping-criterion
     ginkgo-overhead
+    heat-equation
     minimal-cuda-solver
     papi-logging
     par-ilu-convergence

examples/heat-equation/CMakeLists.txt

@@ -0,0 +1,12 @@
+set(target_name "heat-equation")
+find_package(OpenCV)
+
+if (OpenCV_FOUND)
+    add_executable(${target_name} ${target_name}.cpp)
+    target_link_libraries(${target_name} Ginkgo::ginkgo ${OpenCV_LIBS})
+    target_include_directories(${target_name} PRIVATE ${PROJECT_SOURCE_DIR})
+    configure_file(data/initial.mtx data/initial.mtx COPYONLY)
+    configure_file(data/source.mtx data/source.mtx COPYONLY)
+else()
+    message("OpenCV not found, skipping heat-equation example")
+endif()

examples/heat-equation/build.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# set up script
+if [ $# -ne 1 ]; then
+    echo -e "Usage: $0 GINKGO_BUILD_DIRECTORY"
+    exit 1
+fi
+BUILD_DIR=$1
+THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" &>/dev/null && pwd )
+
+source ${THIS_DIR}/../build-setup.sh
+
+# build
+${CXX} -std=c++14 -o ${THIS_DIR}/heat-equation \
+       ${THIS_DIR}/heat-equation.cpp \
+       -I${THIS_DIR}/../../include -I${BUILD_DIR}/include \
+       `pkg-config --cflags opencv4` \
+       -L${THIS_DIR} ${LINK_FLAGS} \
+       `pkg-config --libs opencv4`