PerspectiveCameraUpdateSystem Class Template

Updates camera transforms for active perspective cameras. More...

Declaration

template <typename TMemberHandle> class helios::engine::scene::systems::PerspectiveCameraUpdateSystem<TMemberHandle> { ... }

Public Member Typedefs Index

template <typename TMemberHandle>
using	EngineRoleTag = SystemRole
	Role tag used for runtime registration as a system. More...

Public Member Functions Index

template <typename TMemberHandle>
void	update (UpdateContext &updateContext) noexcept
	Executes the camera update pass for all active camera entities. More...

Description

Updates camera transforms for active perspective cameras.

Recomputes LookAt and Perspective matrices only when the respective target components are marked as dirty.

Template Parameters

TMemberHandle

Camera entity handle type.

Definition at line 35 of file PerspectiveCameraUpdateSystem.ixx.

Public Member Typedefs

EngineRoleTag

template <typename TMemberHandle>

using helios::engine::scene::systems::PerspectiveCameraUpdateSystem< TMemberHandle >::EngineRoleTag = SystemRole

Role tag used for runtime registration as a system.

Definition at line 42 of file PerspectiveCameraUpdateSystem.ixx.

42 using EngineRoleTag = SystemRole;

Public Member Functions

update()

template <typename TMemberHandle>

void helios::engine::scene::systems::PerspectiveCameraUpdateSystem< TMemberHandle >::update (UpdateContext & updateContext)

inline noexcept

Executes the camera update pass for all active camera entities.

Parameters

updateContext

Frame-local update context with ECS access.

Definition at line 49 of file PerspectiveCameraUpdateSystem.ixx.

49 void update(UpdateContext& updateContext) noexcept {

50

51

52 for (auto [entity, p3c, u3c, tp3c, pcc, pmc, vmc, active] : updateContext.view<

53 TMemberHandle,

54 Position3DComponent<TMemberHandle>,

55 UpVector3DComponent<TMemberHandle>,

56 TargetPosition3DComponent<TMemberHandle>,

57 PerspectiveCameraComponent<TMemberHandle>,

58 ProjectionMatrixComponent<TMemberHandle>,

59 ViewMatrixComponent<TMemberHandle>,

60 Active<TMemberHandle>

61 >().whereEnabled()) {

62

63 if (p3c->isDirty() || tp3c->isDirty() || u3c->isDirty()) {

64 vmc->setValue(helios::math::lookAt(

65 p3c->value(),

66 tp3c->value(),

67 u3c->value()

68 ));

69 }

70

71

72 if (pcc->isDirty()) {

73 pmc->setValue(helios::math::perspective(

74 pcc->fovY(),

75 pcc->aspectRatio(),

76 pcc->zNear(),

77 pcc->zFar()

78 ));

79 }

80

81 }

82

83 }

Reference helios::engine::scene::registerComponents.

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The documentation for this class was generated from the following file:

• PerspectiveCameraUpdateSystem.ixx

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