Bounds.ixx File

Utility functions for computing world-space bounding volumes. More...

Included Headers

#include <helios.engine.modules.rendering.model.components.ModelAabbComponent> #include <helios.engine.modules.spatial.transform.components.TranslationStateComponent> #include <helios.engine.modules.spatial.transform.components.ScaleStateComponent> #include <helios.engine.modules.scene.components.SceneNodeComponent> #include <helios.engine.modules.spatial.transform.components.RotationStateComponent> #include <helios.engine.runtime.world.GameWorld> #include <helios.engine.ecs.GameObject> #include <helios.core.units.Unit> #include <helios.engine.runtime.world.UpdateContext> #include <helios.math> #include <helios.engine.ecs.System>

Namespaces Index

namespace	helios
namespace	engine
	Main engine module aggregating core infrastructure and game systems. More...
namespace	modules
	Domain-specific components and systems. More...
namespace	physics
	Physics simulation and collision detection subsystem for the game engine. More...
namespace	collision
namespace	Bounds

Description

Utility functions for computing world-space bounding volumes.

File Listing

The file content with the documentation metadata removed is:

1/**

2 * @file Bounds.ixx

3 * @brief Utility functions for computing world-space bounding volumes.

4 */

5module;

6

7export module helios.engine.modules.physics.collision.Bounds;

8

9import helios.engine.ecs.System;

10import helios.math;

11

12import helios.core.units.Unit;

13

14import helios.engine.ecs.GameObject;

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

16import helios.engine.runtime.world.UpdateContext;

17

18import helios.engine.modules.scene.components.SceneNodeComponent;

19import helios.engine.modules.spatial.transform.components.ScaleStateComponent;

20import helios.engine.modules.spatial.transform.components.TranslationStateComponent;

21import helios.engine.modules.spatial.transform.components.RotationStateComponent;

22

23import helios.engine.modules.rendering.model.components.ModelAabbComponent;

24

25export namespace helios::engine::modules::physics::collision::Bounds {

26

27 /**

28 * @brief Computes the world-space AABB from local model bounds and transforms.

29 *

30 * Combines the parent's world transform with the entity's local translation,

31 * rotation, and scale to transform the model-space AABB into world space.

32 *

33 * The transformation order is: Translation * Rotation * Scale (TRS).

34 *

35 * @param mab Model AABB component containing the local bounding box.

36 * @param sc Scene node component for accessing parent world transform.

37 * @param tsc Translation state component with local position.

38 * @param sca Scale state component with local scaling factors.

39 * @param rsc Rotation state component with local rotation matrix.

40 *

41 * @return World-space axis-aligned bounding box.

42 */

43 inline helios::math::aabbf computeWorldAabb(

44 const helios::engine::modules::rendering::model::components::ModelAabbComponent& mab,

45 const helios::engine::modules::scene::components::SceneNodeComponent& sc,

46 const helios::engine::modules::spatial::transform::components::TranslationStateComponent& tsc,

47 const helios::engine::modules::spatial::transform::components::ScaleStateComponent& sca,

48 helios::engine::modules::spatial::transform::components::RotationStateComponent& rsc

49 ) noexcept {

50

51 const helios::math::mat4f& parentTransform = sc.sceneNode()->parent()->worldTransform();

52

53 const helios::math::vec3f localTranslation = tsc.translation();

54 const helios::math::mat4f localRotation = rsc.rotation();

55 const helios::math::vec3f localScaling = sca.scaling();

56

57 const helios::math::mat4f mScaling = helios::math::mat4f::identity().withScaling(localScaling);

58 const helios::math::mat4f mTranslation = helios::math::mat4f::identity().withTranslation(localTranslation);

59

60 const helios::math::mat4f localTransform = mTranslation * (localRotation * mScaling);

61

62 return mab.aabb().applyTransform(parentTransform * localTransform);

63 }

64

65}

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