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Code Issues 154 Wiki Activity

Cull and assign LOD to instances in a compute pass

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Hirek
2026-10-16 01:08:44 +02:00
parent 9277c28805
commit 4d3a401aae
14 changed files with 805 additions and 6 deletions
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11
scene/scene.h
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@@ -242,7 +242,7 @@ public:
// pass rejects most of them. the renderer makes the copies and goes by them, and reads the instance itself only
// for the first one of a batch drawn. the layout follows std430, for the copies to be handed to the gpu as they are
struct instance_record {
glm::vec3 position { 0.f }; // location of the instance, relative to the origin of the records of its bucket
packed_vec3 position { 0.f }; // location of the instance, relative to the origin of the records of its bucket
float radius { 0.f };
float rangesquaredmin { 0.f }; // visibility range of the instance
float rangesquaredmax { 0.f };
@@ -251,6 +251,9 @@ public:
glm::vec4 rotationscale[ 3 ] {}; // columns of rotation and scale of the instance, w unused
};
static_assert( sizeof( instance_record ) == 80, "instance_record has to keep its std430 layout" );
static_assert( offsetof( instance_record, radius ) == 12, "instance_record has to keep its std430 layout" );
static_assert( offsetof( instance_record, flags ) == 24, "instance_record has to keep its std430 layout" );
static_assert( offsetof( instance_record, rotationscale ) == 32, "instance_record has to keep its std430 layout" );
enum instance_record_flags : std::uint32_t {
instance_visible = 1 << 0,
instance_instanceable = 1 << 1, // false once an event gave the instance animations or a skin of its own
@@ -262,6 +265,12 @@ public:
mutable glm::dvec3 recordorigin { 0.0 }; // the records hold locations relative to it
mutable float lodrangesquared { 0.f }; // past it no submodel of the model of the bucket is drawn
mutable unsigned int recordsversion { 0 };
// place of the records in the record buffer of the gpu culling: first record, room, and the generation of
// the buffer it is good for. gpustale: the records changed since they were sent
mutable std::uint32_t gpufirst { 0 };
mutable std::uint32_t gpucapacity { 0 };
mutable unsigned int gpugeneration { 0 };
mutable bool gpustale { true };
};
using instance_bucketdata_map = std::unordered_map< instance_bucket_key, instance_bucket, instance_bucket_key_hash >;
using sound_sequence = std::vector<sound_source *>;