DefaultEngineStateTransitionRules.ixx File

Default transition rules for the game state machine. More...

Included Headers

#include <span> #include <array> #include <cstddef> #include <helios.engine.rendering.shader.types.ShaderHandle> #include <helios.engine.state.types.StateTransitionId> #include <helios.engine.runtime.enginestate.rules.guards> #include <helios.engine.runtime.enginestate.types> #include <helios.engine.state.types.StateTransitionRule> #include <helios.engine.runtime.world.UpdateContext>

Namespaces Index

namespace	helios
namespace	engine
namespace	runtime
namespace	enginestate
namespace	rules

Classes Index

class	DefaultEngineStateTransitionRules
	Provides the default set of game state transition rules. More...

Description

Default transition rules for the game state machine.

File Listing

The file content with the documentation metadata removed is:

1

5module;

6

7#include <span>

8#include <array>

9#include <cstddef>

10

11export module helios.engine.runtime.enginestate.rules.DefaultEngineStateTransitionRules;

12

13

14

15import helios.engine.runtime.world.UpdateContext;

16

17import helios.engine.runtime.enginestate.types;

18import helios.engine.runtime.enginestate.rules.guards;

19

20import helios.engine.state.types.StateTransitionRule;

21import helios.engine.state.types.StateTransitionId;

22import helios.engine.rendering.shader.types.ShaderHandle;

23

24using namespace helios::engine::state::types;

25using namespace helios::engine::rendering::shader::types;

26using namespace helios::engine::runtime::world;

27using namespace helios::engine::runtime::enginestate::rules::guards;

28export namespace helios::engine::runtime::enginestate::rules {

29

30 using namespace helios::engine::runtime::enginestate::types;

31 using namespace helios::engine::state::types;

32

36 class DefaultEngineStateTransitionRules {

37

38

39 static constexpr auto rules_ = [] {

40 std::array baseRules = std::to_array<StateTransitionRule<EngineState>>({

41

42 {EngineState::Undefined, EngineStateTransitionId::BootRequest, EngineState::Booting},

43 {EngineState::Booting, EngineStateTransitionId::BootRequest, EngineState::Booted,

44 &DefaultEngineStateTransitionGuards::isPlatformInitialized},

45

46 {EngineState::Booted, EngineStateTransitionId::WarmupRequest, EngineState::Warmup,

47 &DefaultEngineStateTransitionGuards::isRuntimeInfrastructureReady},

48

49 {EngineState::Warmup, EngineStateTransitionId::WarmupDone, EngineState::Running},

50

51 });

52

53 constexpr EngineState shutdownable[] = {

54 EngineState::Running,

55 EngineState::Warmup

56 };

57

58 std::array<StateTransitionRule<EngineState>, baseRules.size() + std::size(shutdownable)> rules{};

59

60 for (size_t i = 0; i < baseRules.size(); i++) {

61 rules[i] = baseRules[i];

62 }

63

64 for (size_t i = 0; i < std::size(shutdownable); i++) {

65 rules[baseRules.size() + i] = StateTransitionRule<EngineState>{

66 shutdownable[i],

67 EngineStateTransitionId::ShutdownRequest,

68 EngineState::Shutdown

69 };

70 }

71

72 return rules;

73 }();

74

75

76

77 public:

78

84 [[nodiscard]] static std::span<const StateTransitionRule<EngineState>> rules() {

85 return std::span{rules_};

86 }

87

88 };

89 }

90

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