Add compile-time option for calculation precision selection

Author: dimitrivlachos

CMakeLists.txt

@@ -16,6 +16,9 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 # Option to use 32-bit pixel data instead of 16-bit
 option(PIXEL_DATA_32BIT "Use 32-bit pixel data instead of 16-bit" OFF)
 
+# Option to use double precision for CUDA calculations
+option(USE_DOUBLE_PRECISION "Use double precision for CUDA calculations" OFF)
+
 include(SetDefaultBuildRelWithDebInfo)
 include(AlwaysColourCompilation)
 
@@ -89,6 +92,14 @@ if(PIXEL_DATA_32BIT)
 else()
     message(STATUS "Building with 16-bit pixel data support")
 endif()
+
+if(USE_DOUBLE_PRECISION)
+    target_compile_definitions(compile_options INTERFACE USE_DOUBLE_PRECISION)
+    message(STATUS "Building with double precision")
+else()
+    message(STATUS "Building with single precision")
+endif()
+
 # Make a common C++ library for shared code
 add_library(ffs_common STATIC 
     src/ffs/ffs_logger.cc

build.sh

@@ -190,16 +190,16 @@ main() {
 
         # Build production version
         if [[ "$PIXEL_32BIT" == "true" ]]; then
-            build_directory "build" "-DPIXEL_DATA_32BIT=ON -DCMAKE_BUILD_TYPE=Release" "production (32-bit)"
+            build_directory "build" "-DPIXEL_DATA_32BIT=ON -DUSE_DOUBLE_PRECISION=ON -DCMAKE_BUILD_TYPE=Release" "production (32-bit, double precision)"
         else
-            build_directory "build" "-DCMAKE_BUILD_TYPE=Release" "production (16-bit)"
+            build_directory "build" "-DUSE_DOUBLE_PRECISION=ON -DCMAKE_BUILD_TYPE=Release" "production (16-bit, double precision)"
         fi
     else
         print_status "Development build mode"
 
         # Build both 16-bit and 32-bit versions
-        build_directory "build" "-DCMAKE_BUILD_TYPE=RelWithDebInfo" "development (16-bit)"
-        build_directory "build_32bit" "-DPIXEL_DATA_32BIT=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo" "development (32-bit)"
+        build_directory "build" "-DUSE_DOUBLE_PRECISION=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo" "development (16-bit, double precision)"
+        build_directory "build_32bit" "-DPIXEL_DATA_32BIT=ON -DUSE_DOUBLE_PRECISION=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo" "development (32-bit, double precision)"
     fi
 
     print_success "Build completed successfully!"