restructured project

src/CMakeLists.txt

@@ -1,16 +1,5 @@
-# CMakeList.txt : CMake project for EulerFluid, include source and define
-# project specific logic here.
-#
-cmake_minimum_required (VERSION 3.8)
+set(BUILD_EULER_FLUID ON CACHE BOOL "Build Euler Fluid Project")
 
-# Add source to this project's executable.
-add_executable (EulerFluid "main.cpp" "Application.hpp" "Application.cpp" "VectorField.hpp" "VectorField.cpp" "FluidField.hpp" "FluidField.cpp")
-
-target_include_directories(EulerFluid PUBLIC ${SDL2_INCLUDE_DIRS})
-target_link_libraries(EulerFluid PUBLIC ${SDL2_LIBRARIES})
-
-if(MSVC)
-target_compile_definitions(EulerFluid PUBLIC _CRT_SECURE_NO_WARNINGS)
-endif()
-
-# TODO: Add tests and install targets if needed.
+if(${BUILD_EULER_FLUID})
+	add_subdirectory(EulerFluid)
+endif()

src/EulerFluid/Application.cpp

@@ -88,7 +88,7 @@ void Application::Update()
 	before = std::chrono::steady_clock::now();
 
 	field->VelocityStep(0.002, frametime);
-	field->DensityStep(0.001, frametime);
+	field->DensityStep(0.0005, frametime);
 }
 
 void Application::Render()

src/EulerFluid/CMakeLists.txt

@@ -0,0 +1,16 @@
+# CMakeList.txt : CMake project for EulerFluid, include source and define
+# project specific logic here.
+#
+cmake_minimum_required (VERSION 3.8)
+
+# Add source to this project's executable.
+add_executable (EulerFluid "main.cpp" "Application.hpp" "Application.cpp" "VectorField.hpp" "VectorField.cpp" "FluidField.hpp" "FluidField.cpp")
+
+target_include_directories(EulerFluid PUBLIC ${SDL2_INCLUDE_DIRS})
+target_link_libraries(EulerFluid PUBLIC ${SDL2_LIBRARIES})
+
+if(MSVC)
+target_compile_definitions(EulerFluid PUBLIC _CRT_SECURE_NO_WARNINGS)
+endif()
+
+# TODO: Add tests and install targets if needed.

src/EulerFluid/FluidField.cpp

@@ -215,7 +215,7 @@ void FluidField::VelocityStep(double visc, double dt)
 	AdvectVelocity(dt);
 	Project();
 
-	vel->RecalculateMagnitude();
+	// vel->RecalculateMagnitude();
 }
 
 void FluidField::Project()

src/EulerFluid/VectorField.cpp

@@ -62,14 +62,15 @@ void VectorField::RecalculateMagnitude()
 		{
 			double u = horizontal[y * this->width + x];
 			double v = vertical[y * this->width + x];
-			double magnitude = u + v;
+			double magnitude = u*u + v*v;
 
-			biggestMagnitude += (biggestMagnitude < magnitude) * (magnitude - biggestMagnitude);
+			biggestMagnitude = std::max(biggestMagnitude, magnitude);
 		}
 	}
 
 	if (biggestMagnitude == 0.0)	// should use an epsilon probably
 		biggestMagnitude = 1.0;
 
-	biggestMagnitude = sqrt(biggestMagnitude * 5.0);
+	biggestMagnitude = sqrt(biggestMagnitude);
+	biggestMagnitude = 0.5f;
 }