/// <summary>
/// Attaches a collider to the specified game object based on the specified object collider
/// attachment settings.
/// </summary>
private void AttachColliderToGameObject(GameObject gameObject, ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
// Attach a collider to the game object based on the type of object we are dealing with.
// Note: We also remove all attached colliders before attaching new ones and we also check
// if the collider attachement settings allow us to modify the object collider.
if (gameObject.GetComponent <SpriteRenderer>() != null && !colliderAttachmentSettings.IgnoreSpriteObjects)
{
gameObject.RemoveAllColliders();
AttachColliderToSpriteObject(gameObject, colliderAttachmentSettings);
}
else
if (gameObject.GetMesh() != null && !colliderAttachmentSettings.IgnoreMeshObjects)
{
gameObject.RemoveAllColliders();
AttachColliderToMeshObject(gameObject, colliderAttachmentSettings);
}
else
if (gameObject.GetFirstLightComponent() != null && !colliderAttachmentSettings.IgnoreLightObjects)
{
gameObject.RemoveAllColliders();
AttachColliderToLightObject(gameObject, colliderAttachmentSettings);
}
else
if (gameObject.GetFirstParticleSystemComponent() != null && !colliderAttachmentSettings.IgnoreParticleSystemObjects)
{
gameObject.RemoveAllColliders();
AttachColliderToParticleSystemObject(gameObject, colliderAttachmentSettings);
}
}
/// <summary>
/// Attaches a collider to the specified particle system object based on the specified settings.
/// </summary>
/// <remarks>
/// If the collider attachment settings specify a mesh collider for particle system objects, a
/// box collider will be used instead.
/// </remarks>
private void AttachColliderToParticleSystemObject(GameObject gameObject, ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
// Attach a new collider based on the required collider type
if (colliderAttachmentSettings.ColliderTypeForParticleSystemObjects == ObjectCollider3DType.Box ||
colliderAttachmentSettings.ColliderTypeForParticleSystemObjects == ObjectCollider3DType.MeshCollider)
{
// Attach the box collider and set its size to what the settings dictate
BoxCollider boxCollider = gameObject.AddComponent <BoxCollider>();
boxCollider.size = colliderAttachmentSettings.BoxColliderSizeForNonMeshObjects;
}
else
if (colliderAttachmentSettings.ColliderTypeForParticleSystemObjects == ObjectCollider3DType.Sphere)
{
// Attach the sphere collider and set its radius to what the settings dictate
SphereCollider sphereCollider = gameObject.AddComponent <SphereCollider>();
sphereCollider.radius = colliderAttachmentSettings.SphereColliderRadiusForNonMeshObjects;
}
else
if (colliderAttachmentSettings.ColliderTypeForParticleSystemObjects == ObjectCollider3DType.Capsule)
{
// Attach the capsule collider and set its radius ad height to what the settings dictate
CapsuleCollider capsuleCollider = gameObject.AddComponent <CapsuleCollider>();
capsuleCollider.radius = colliderAttachmentSettings.CapsuleColliderRadiusForNonMeshObjects;
capsuleCollider.height = colliderAttachmentSettings.CapsuleColliderHeightForNonMeshObjects;
}
}
/// <summary>
/// Attaches a collider to all scene objects using the specified collider
/// attachment settings.
/// </summary>
/// <remarks>
/// The method will remove any existing object colliders. Also, the method
/// will attach colliders only to mesh, light and particle system objects.
/// If an object has 2 or more of these components attached, the colliders
/// will be attached in the following manner:
/// a) if the object has a mesh attached to it (i.e. a mesh filter with
/// a valid mesh or a skinned mesh renderer with a valid mesh), the
/// mesh collider attachement settings will be used;
/// b) if the object doesn't have a mesh, but it has a light component,
/// the light collider attachement settings will be used;
/// c) if the object doesn't have a light either, but it has a particle
/// system, the particle system collider attachment settings will be used.
/// </remarks>
public void AttachCollidersToAllSceneObjects(ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
// Loop through all scene objects and attach colliders
GameObject[] sceneObjects = RuntimeEditorApplication.FindObjectsOfType <GameObject>();
foreach (GameObject gameObject in sceneObjects)
{
AttachColliderToGameObject(gameObject, colliderAttachmentSettings);
}
}
/// <summary>
/// Attaches a collider to the objects that belong to the specified object hierarchy using
/// the specified object collider attachment settings.
/// </summary>
/// <param name="hierarchyRoot">
/// The root object of the hierarchy whose objects must have colliders attached to them.
/// </param>
/// <remarks>
/// The method will remove any existing object colliders. Also, the method
/// will attach colliders only to mesh, light and particle system objects.
/// If an object has 2 or more of these components attached, the colliders
/// will be attached in the following manner:
/// a) if the object has a mesh attached to it (i.e. a mesh filter with
/// a valid mesh or a skinned mesh renderer with a valid mesh), the
/// mesh collider attachement settings will be used;
/// b) if the object doesn't have a mesh, but it has a light component,
/// the light collider attachement settings will be used;
/// c) if the object doesn't have a light either, but it has a particle
/// system, the particle system collider attachment settings will be used.
/// </remarks>
public void AttachCollidersToObjectHierarchy(GameObject hierarchyRoot, ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
// Loop through all objects in the hierarchy and attach colliders
Transform[] allChildTransforms = hierarchyRoot.GetComponentsInChildren <Transform>(true);
foreach (Transform childTransform in allChildTransforms)
{
GameObject gameObject = childTransform.gameObject;
AttachColliderToGameObject(gameObject, colliderAttachmentSettings);
}
}
private void AttachColliderToSpriteObject(GameObject gameObject, ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
if (colliderAttachmentSettings.ColliderTypeForSpriteObjects == ObjectCollider2DType.Box)
{
gameObject.AddComponent <BoxCollider2D>();
}
else if (colliderAttachmentSettings.ColliderTypeForSpriteObjects == ObjectCollider2DType.Circle)
{
gameObject.AddComponent <CircleCollider2D>();
}
else if (colliderAttachmentSettings.ColliderTypeForSpriteObjects == ObjectCollider2DType.Polygon)
{
gameObject.AddComponent <PolygonCollider2D>();
}
}
/// <summary>
/// Attaches a collider to the specified mesh object based on the specified settings.
/// </summary>
private void AttachColliderToMeshObject(GameObject gameObject, ObjectColliderAttachmentSettings colliderAttachmentSettings)
{
// Attach a new collider based on the required collider type
if (colliderAttachmentSettings.ColliderTypeForMeshObjects == ObjectCollider3DType.MeshCollider)
{
gameObject.AddComponent <MeshCollider>();
}
else if (colliderAttachmentSettings.ColliderTypeForMeshObjects == ObjectCollider3DType.Box)
{
gameObject.AddComponent <BoxCollider>();
}
else if (colliderAttachmentSettings.ColliderTypeForMeshObjects == ObjectCollider3DType.Sphere)
{
gameObject.AddComponent <SphereCollider>();
}
else if (colliderAttachmentSettings.ColliderTypeForMeshObjects == ObjectCollider3DType.Capsule)
{
gameObject.AddComponent <CapsuleCollider>();
}
}