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Graphics: Add DistanceAsSortKey function

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This commit is contained in:
Lynix
2021-10-18 16:46:03 +02:00
parent 9740db8fe2
commit c3999d708f
5 changed files with 72 additions and 26 deletions
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16
include/Nazara/Graphics/RenderSpriteChain.inl
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@@ -3,6 +3,7 @@
// For conditions of distribution and use, see copyright notice in Config.hpp
#include <Nazara/Graphics/RenderSpriteChain.hpp>
#include <Nazara/Graphics/Algorithm.hpp>
#include <Nazara/Graphics/Debug.hpp>
namespace Nz
@@ -32,19 +33,8 @@ namespace Nz
{
UInt64 matFlags = 1;
#if defined(arm) && \
((defined(__MAVERICK__) && defined(NAZARA_BIG_ENDIAN)) || \
(!defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__MAVERICK__)))
#error The following code relies on native-endian IEEE-754 representation, which your platform does not guarantee
#endif
static_assert(sizeof(float) == sizeof(UInt32));
float distanceNear = frustum.GetPlane(Nz::FrustumPlane::Near).Distance(m_worldInstance.GetWorldMatrix().GetTranslation());
UInt32 distanceInt;
std::memcpy(&distanceInt, &distanceNear, sizeof(UInt32));
UInt64 distance = static_cast<UInt64>(~distanceInt); //< Reverse distance to have back to front
float distanceNear = frustum.GetPlane(FrustumPlane::Near).Distance(m_worldInstance.GetWorldMatrix().GetTranslation());
UInt64 distance = DistanceAsSortKey(distanceNear);
// Transparent RQ index:
// - Layer (8bits)