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Move UvStreamTangentBitmask to new files.

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This commit is contained in:
jiaweig
2021-05-25 18:47:04 -07:00
parent 3dc76d76c0
commit f64bd999e0
6 changed files with 147 additions and 103 deletions
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Gems/Atom/RPI/Code/Source/RPI.Public/Model/ModelLod.cpp
-51
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@@ -439,56 +439,5 @@ namespace AZ
m_buffers.emplace_back(buffer);
return static_cast<uint32_t>(m_buffers.size() - 1);
}
uint32_t UvStreamTangentBitmask::GetFullTangentBitmask() const
{
return m_mask;
}
uint32_t UvStreamTangentBitmask::GetUvStreamCount() const
{
return m_mask >> (sizeof(m_mask) * CHAR_BIT - BitsForUvIndex);
}
uint32_t UvStreamTangentBitmask::GetTangentAtUv(uint32_t uvIndex) const
{
return (m_mask >> (BitsPerTangent * uvIndex)) & 0b1111u;
}
void UvStreamTangentBitmask::ApplyTangent(uint32_t tangentIndex)
{
uint32_t currentSlot = GetUvStreamCount();
if (currentSlot >= MaxUvSlots)
{
AZ_Error("UV Stream", false, "Reaching the max of avaiblable stream slots.");
return;
}
if (tangentIndex > UnassignedTangent)
{
AZ_Warning(
"UV Stream", false,
"Tangent index must use %d bits as defined in UvStreamTangentIndex::m_flag. Unassigned index will be applied.",
BitsPerTangent);
tangentIndex = UnassignedTangent;
}
uint32_t clearMask = 0b1111u << (BitsPerTangent * currentSlot);
clearMask = ~clearMask;
// Clear the writing bits in case
m_mask &= clearMask;
// Write the bits to the slot
m_mask |= (tangentIndex << (BitsPerTangent * currentSlot));
// Increase the index
m_mask += (1u << (sizeof(m_mask) * CHAR_BIT - BitsForUvIndex));
}
void UvStreamTangentBitmask::Reset()
{
m_mask = 0;
}
} // namespace RPI
} // namespace AZ