AABBCullingStrategy.ixx File

Culling strategy based on AABB. More...

Included Headers

#include <cmath> #include <helios.engine.scene.types.CullingContext> #include <helios.ecs.types.EntityHandle> #include <helios.math>

Namespaces Index

namespace	helios
namespace	engine
namespace	scene

Classes Index

class	AABBCullingStrategy<TMemberHandle>
	NAABB culling strategy implementation. More...

Description

Culling strategy based on AABB.

File Listing

The file content with the documentation metadata removed is:

1

5module;

6

7#include <cmath>

8

9export module helios.engine.scene.AABBCullingStrategy;

10

11

12import helios.math;

13

14import helios.ecs.types.EntityHandle;

15import helios.engine.scene.types.CullingContext;

16

17using namespace helios::ecs::types;

18using namespace helios::engine::scene::types;

19export namespace helios::engine::scene {

20

28 template<typename TMemberHandle>

29 class AABBCullingStrategy {

30

31

32

33 public:

34

35 using MemberHandle_type = TMemberHandle;

36

51 bool shouldRender(const CullingContext<TMemberHandle>& ctx) noexcept {

52

53 auto& planes = ctx.frustumPlanes;

54 auto& bounds = ctx.bounds;

55

56 const auto c = bounds.center();

57 const auto h = bounds.extent();

58

59 for (auto& plane : planes) {

60 const auto n = plane.normal;

61

62 const auto e = h[0] * std::abs(n[0]) + h[1] * std::abs(n[1]) + h[2] * std::abs(n[2]);

63

64 const auto s = c.dot(n) - plane.distance;

65

66 if (s + e < 0 ) { // OUTSIDE

67 return false;

68 }

69 }

70

71

72 return true; // INSIDE

73 }

74

75 };

76}

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