Example of creating BPLI

CMakeLists.txt

@@ -28,6 +28,12 @@ add_executable(HelloWorld
     HelloWorld/main.cpp
 )
 
+# cxx_std_20 gives us designated initializers, bringing us closer to Actual C.
+target_compile_features(HelloWorld PRIVATE cxx_std_20)
+
+# Eventually we should switch back to Actual C:
+# set_property(TARGET HelloWorld PROPERTY C_STANDARD 23)
+
 target_include_directories(HelloWorld PUBLIC .)
 target_link_libraries(HelloWorld PUBLIC joltc)
 

HelloWorld/main.cpp

@@ -1,7 +1,45 @@
 #include <stdio.h>
+#include <stdint.h>
 
 #include "JoltC/JoltC.h"
 
+#ifdef _MSC_VER
+	#define unreachable() __assume(0)
+#else
+	#define unreachable() __builtin_unreachable()
+#endif
+
+typedef enum Hello_ObjectLayers {
+	HELLO_OL_NON_MOVING,
+	HELLO_OL_MOVING,
+	HELLO_OL_COUNT,
+} Hello_ObjectLayers;
+
+typedef enum Hello_BroadPhaseLayers {
+	HELLO_BPL_NON_MOVING,
+	HELLO_BPL_MOVING,
+	HELLO_BPL_COUNT,
+} Hello_BroadPhaseLayers;
+
+unsigned int Hello_GetNumBroadPhaseLayers(void* self) {
+	return HELLO_BPL_COUNT;
+}
+
+JPC_BroadPhaseLayer Hello_GetBroadPhaseLayer(void* self, JPC_ObjectLayer inLayer) {
+	if (inLayer == HELLO_OL_NON_MOVING) {
+		return HELLO_BPL_NON_MOVING;
+	} else if (inLayer == HELLO_OL_MOVING) {
+		return HELLO_BPL_MOVING;
+	} else {
+		unreachable();
+	}
+}
+
+static JPC_BroadPhaseLayerInterfaceFns Hello_BPL = {
+	.GetNumBroadPhaseLayers = Hello_GetNumBroadPhaseLayers,
+	.GetBroadPhaseLayer = Hello_GetBroadPhaseLayer,
+};
+
 int main() {
 	JPC_RegisterDefaultAllocator();
 	JPC_FactoryInit();
@@ -11,8 +49,19 @@ int main() {
 
 	JPC_JobSystemThreadPool* job_system = JPC_JobSystemThreadPool_new2(JPC_MAX_PHYSICS_JOBS, JPC_MAX_PHYSICS_BARRIERS);
 
+	JPC_BroadPhaseLayerInterface broad_phase_layer_interface = {
+		.fns = &Hello_BPL,
+		.self = nullptr,
+	};
+
+	// create object_vs_broadphase_layer_filter
+
+	// create object_vs_object_layer_filter
+
 	JPC_PhysicsSystem* physics_system = JPC_PhysicsSystem_new();
 
+	// JPC_PhysicsSystem_Init();
+
 	JPC_PhysicsSystem_delete(physics_system);
 	JPC_JobSystemThreadPool_delete(job_system);
 	JPC_TempAllocatorImpl_delete(temp_allocator);