[llvm-branch-commits] [clang] [llvm] [HLSL][RootSiganture] Add parsing of new number params in StaticSampler (PR #140291)
Finn Plummer via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Mon May 26 14:03:02 PDT 2025
https://github.com/inbelic updated https://github.com/llvm/llvm-project/pull/140291
>From d6148b7d9815c2543f37d50a7a611e482c99b91c Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:08:36 +0000
Subject: [PATCH 1/8] pre-req: add keywords
---
clang/include/clang/Lex/HLSLRootSignatureTokenKinds.def | 3 +++
clang/unittests/Lex/LexHLSLRootSignatureTest.cpp | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/clang/include/clang/Lex/HLSLRootSignatureTokenKinds.def b/clang/include/clang/Lex/HLSLRootSignatureTokenKinds.def
index 5d16eaa5b72f6..7ca131349fed4 100644
--- a/clang/include/clang/Lex/HLSLRootSignatureTokenKinds.def
+++ b/clang/include/clang/Lex/HLSLRootSignatureTokenKinds.def
@@ -102,6 +102,9 @@ KEYWORD(offset)
// StaticSampler Keywords:
KEYWORD(mipLODBias)
+KEYWORD(maxAnisotropy)
+KEYWORD(minLOD)
+KEYWORD(maxLOD)
// Unbounded Enum:
UNBOUNDED_ENUM(unbounded, "unbounded")
diff --git a/clang/unittests/Lex/LexHLSLRootSignatureTest.cpp b/clang/unittests/Lex/LexHLSLRootSignatureTest.cpp
index b610b8f10f8da..575a97e75a05d 100644
--- a/clang/unittests/Lex/LexHLSLRootSignatureTest.cpp
+++ b/clang/unittests/Lex/LexHLSLRootSignatureTest.cpp
@@ -136,7 +136,7 @@ TEST_F(LexHLSLRootSignatureTest, ValidLexAllTokensTest) {
space visibility flags
numDescriptors offset
- mipLODBias
+ mipLODBias maxAnisotropy minLOD maxLOD
unbounded
DESCRIPTOR_RANGE_OFFSET_APPEND
>From 79d817fe7d8b0c754ff9ea70feb077c65f8d2a25 Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:10:05 +0000
Subject: [PATCH 2/8] add parsing for maxAnisotropy
---
.../clang/Parse/ParseHLSLRootSignature.h | 1 +
clang/lib/Parse/ParseHLSLRootSignature.cpp | 20 +++++++++++++++++++
.../llvm/Frontend/HLSL/HLSLRootSignature.h | 1 +
3 files changed, 22 insertions(+)
diff --git a/clang/include/clang/Parse/ParseHLSLRootSignature.h b/clang/include/clang/Parse/ParseHLSLRootSignature.h
index c12b022a030ef..9fc991cfabc6d 100644
--- a/clang/include/clang/Parse/ParseHLSLRootSignature.h
+++ b/clang/include/clang/Parse/ParseHLSLRootSignature.h
@@ -112,6 +112,7 @@ class RootSignatureParser {
struct ParsedStaticSamplerParams {
std::optional<llvm::hlsl::rootsig::Register> Reg;
std::optional<float> MipLODBias;
+ std::optional<uint32_t> MaxAnisotropy;
};
std::optional<ParsedStaticSamplerParams> parseStaticSamplerParams();
diff --git a/clang/lib/Parse/ParseHLSLRootSignature.cpp b/clang/lib/Parse/ParseHLSLRootSignature.cpp
index db2e922160062..41e4b31d8ff84 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -384,6 +384,9 @@ std::optional<StaticSampler> RootSignatureParser::parseStaticSampler() {
if (Params->MipLODBias.has_value())
Sampler.MipLODBias = Params->MipLODBias.value();
+ if (Params->MaxAnisotropy.has_value())
+ Sampler.MaxAnisotropy= Params->MaxAnisotropy.value();
+
if (consumeExpectedToken(TokenKind::pu_r_paren,
diag::err_hlsl_unexpected_end_of_params,
/*param of=*/TokenKind::kw_StaticSampler))
@@ -686,6 +689,23 @@ RootSignatureParser::parseStaticSamplerParams() {
return std::nullopt;
Params.MipLODBias = (float)*MipLODBias;
}
+
+ // `maxAnisotropy` `=` POS_INT
+ if (tryConsumeExpectedToken(TokenKind::kw_maxAnisotropy)) {
+ if (Params.MaxAnisotropy.has_value()) {
+ getDiags().Report(CurToken.TokLoc, diag::err_hlsl_rootsig_repeat_param)
+ << CurToken.TokKind;
+ return std::nullopt;
+ }
+
+ if (consumeExpectedToken(TokenKind::pu_equal))
+ return std::nullopt;
+
+ auto MaxAnisotropy = parseUIntParam();
+ if (!MaxAnisotropy.has_value())
+ return std::nullopt;
+ Params.MaxAnisotropy = MaxAnisotropy;
+ }
} while (tryConsumeExpectedToken(TokenKind::pu_comma));
return Params;
diff --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index 6b4da48a302bc..b09ea688627d6 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -161,6 +161,7 @@ struct DescriptorTableClause {
struct StaticSampler {
Register Reg;
float MipLODBias = 0.f;
+ uint32_t MaxAnisotropy = 16;
};
/// Models RootElement : RootFlags | RootConstants | RootParam
>From 4ed8cdd9f0d5166c6e391406aa9d7337e750a39c Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:13:37 +0000
Subject: [PATCH 3/8] add parsing for minLOD
---
.../clang/Parse/ParseHLSLRootSignature.h | 1 +
clang/lib/Parse/ParseHLSLRootSignature.cpp | 20 +++++++++++++++++++
.../llvm/Frontend/HLSL/HLSLRootSignature.h | 1 +
3 files changed, 22 insertions(+)
diff --git a/clang/include/clang/Parse/ParseHLSLRootSignature.h b/clang/include/clang/Parse/ParseHLSLRootSignature.h
index 9fc991cfabc6d..8c4a945d440e5 100644
--- a/clang/include/clang/Parse/ParseHLSLRootSignature.h
+++ b/clang/include/clang/Parse/ParseHLSLRootSignature.h
@@ -113,6 +113,7 @@ class RootSignatureParser {
std::optional<llvm::hlsl::rootsig::Register> Reg;
std::optional<float> MipLODBias;
std::optional<uint32_t> MaxAnisotropy;
+ std::optional<float> MinLOD;
};
std::optional<ParsedStaticSamplerParams> parseStaticSamplerParams();
diff --git a/clang/lib/Parse/ParseHLSLRootSignature.cpp b/clang/lib/Parse/ParseHLSLRootSignature.cpp
index 41e4b31d8ff84..1d82ffd2ec8f9 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -387,6 +387,9 @@ std::optional<StaticSampler> RootSignatureParser::parseStaticSampler() {
if (Params->MaxAnisotropy.has_value())
Sampler.MaxAnisotropy= Params->MaxAnisotropy.value();
+ if (Params->MinLOD.has_value())
+ Sampler.MinLOD= Params->MinLOD.value();
+
if (consumeExpectedToken(TokenKind::pu_r_paren,
diag::err_hlsl_unexpected_end_of_params,
/*param of=*/TokenKind::kw_StaticSampler))
@@ -706,6 +709,23 @@ RootSignatureParser::parseStaticSamplerParams() {
return std::nullopt;
Params.MaxAnisotropy = MaxAnisotropy;
}
+
+ // `minLOD` `=` NUMBER
+ if (tryConsumeExpectedToken(TokenKind::kw_minLOD)) {
+ if (Params.MinLOD.has_value()) {
+ getDiags().Report(CurToken.TokLoc, diag::err_hlsl_rootsig_repeat_param)
+ << CurToken.TokKind;
+ return std::nullopt;
+ }
+
+ if (consumeExpectedToken(TokenKind::pu_equal))
+ return std::nullopt;
+
+ auto MinLOD= parseFloatParam();
+ if (!MinLOD.has_value())
+ return std::nullopt;
+ Params.MinLOD = MinLOD;
+ }
} while (tryConsumeExpectedToken(TokenKind::pu_comma));
return Params;
diff --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index b09ea688627d6..6e1552ee0e3ab 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -162,6 +162,7 @@ struct StaticSampler {
Register Reg;
float MipLODBias = 0.f;
uint32_t MaxAnisotropy = 16;
+ float MinLOD = 0.f;
};
/// Models RootElement : RootFlags | RootConstants | RootParam
>From 1b337eaec93d432347cd6da44ac92699d0c181a9 Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:14:25 +0000
Subject: [PATCH 4/8] add parsing for maxLOD
---
.../clang/Parse/ParseHLSLRootSignature.h | 1 +
clang/lib/Parse/ParseHLSLRootSignature.cpp | 20 +++++++++++++++++++
.../llvm/Frontend/HLSL/HLSLRootSignature.h | 1 +
3 files changed, 22 insertions(+)
diff --git a/clang/include/clang/Parse/ParseHLSLRootSignature.h b/clang/include/clang/Parse/ParseHLSLRootSignature.h
index 8c4a945d440e5..e62d5de948a44 100644
--- a/clang/include/clang/Parse/ParseHLSLRootSignature.h
+++ b/clang/include/clang/Parse/ParseHLSLRootSignature.h
@@ -114,6 +114,7 @@ class RootSignatureParser {
std::optional<float> MipLODBias;
std::optional<uint32_t> MaxAnisotropy;
std::optional<float> MinLOD;
+ std::optional<float> MaxLOD;
};
std::optional<ParsedStaticSamplerParams> parseStaticSamplerParams();
diff --git a/clang/lib/Parse/ParseHLSLRootSignature.cpp b/clang/lib/Parse/ParseHLSLRootSignature.cpp
index 1d82ffd2ec8f9..95935bb8e6424 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -390,6 +390,9 @@ std::optional<StaticSampler> RootSignatureParser::parseStaticSampler() {
if (Params->MinLOD.has_value())
Sampler.MinLOD= Params->MinLOD.value();
+ if (Params->MaxLOD.has_value())
+ Sampler.MaxLOD= Params->MaxLOD.value();
+
if (consumeExpectedToken(TokenKind::pu_r_paren,
diag::err_hlsl_unexpected_end_of_params,
/*param of=*/TokenKind::kw_StaticSampler))
@@ -726,6 +729,23 @@ RootSignatureParser::parseStaticSamplerParams() {
return std::nullopt;
Params.MinLOD = MinLOD;
}
+
+ // `maxLOD` `=` NUMBER
+ if (tryConsumeExpectedToken(TokenKind::kw_maxLOD)) {
+ if (Params.MaxLOD.has_value()) {
+ getDiags().Report(CurToken.TokLoc, diag::err_hlsl_rootsig_repeat_param)
+ << CurToken.TokKind;
+ return std::nullopt;
+ }
+
+ if (consumeExpectedToken(TokenKind::pu_equal))
+ return std::nullopt;
+
+ auto MaxLOD= parseFloatParam();
+ if (!MaxLOD.has_value())
+ return std::nullopt;
+ Params.MaxLOD = MaxLOD;
+ }
} while (tryConsumeExpectedToken(TokenKind::pu_comma));
return Params;
diff --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index 6e1552ee0e3ab..f1da4c7998c7e 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -163,6 +163,7 @@ struct StaticSampler {
float MipLODBias = 0.f;
uint32_t MaxAnisotropy = 16;
float MinLOD = 0.f;
+ float MaxLOD = 3.402823466e+38f;
};
/// Models RootElement : RootFlags | RootConstants | RootParam
>From 94e87389150f36f1ab6bc45ca573d545fa07f0cb Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:21:35 +0000
Subject: [PATCH 5/8] add testing of setting parameters
---
.../Parse/ParseHLSLRootSignatureTest.cpp | 23 +++++++++++++++++--
.../llvm/Frontend/HLSL/HLSLRootSignature.h | 2 +-
2 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
index 539232e0bf2c2..b4ed634bb4d75 100644
--- a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
+++ b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
@@ -225,7 +225,11 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseDTClausesTest) {
TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
const llvm::StringLiteral Source = R"cc(
- StaticSampler(s0, mipLODBias = 0)
+ StaticSampler(s0),
+ StaticSampler(s0, maxAnisotropy = 3,
+ minLOD = 4.2f, mipLODBias = 0.23e+3,
+ maxLOD = 9000,
+ )
)cc";
TrivialModuleLoader ModLoader;
@@ -241,13 +245,28 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
ASSERT_FALSE(Parser.parse());
- ASSERT_EQ(Elements.size(), 1u);
+ ASSERT_EQ(Elements.size(), 2u);
+ // Check default values are as expected
RootElement Elem = Elements[0];
ASSERT_TRUE(std::holds_alternative<StaticSampler>(Elem));
ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.ViewType, RegisterType::SReg);
ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.Number, 0u);
ASSERT_EQ(std::get<StaticSampler>(Elem).MipLODBias, 0.f);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MaxAnisotropy, 16u);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 0.f);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 3.402823466e+38f);
+
+ // Check values can be set as expected
+ Elem = Elements[1];
+ ASSERT_TRUE(std::holds_alternative<StaticSampler>(Elem));
+ ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.ViewType, RegisterType::SReg);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.Number, 0u);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MipLODBias, 230.f);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MaxAnisotropy, 3u);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
+ ASSERT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 9000.f);
+
ASSERT_TRUE(Consumer->isSatisfied());
}
diff --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index f1da4c7998c7e..8ee58b87f5e49 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -163,7 +163,7 @@ struct StaticSampler {
float MipLODBias = 0.f;
uint32_t MaxAnisotropy = 16;
float MinLOD = 0.f;
- float MaxLOD = 3.402823466e+38f;
+ float MaxLOD = 3.402823466e+38f; // FLT_MAX
};
/// Models RootElement : RootFlags | RootConstants | RootParam
>From 5733ae3e3fec19d580eea0e86f87b9776012f672 Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Fri, 16 May 2025 16:54:11 +0000
Subject: [PATCH 6/8] format
---
clang/lib/Parse/ParseHLSLRootSignature.cpp | 10 +++++-----
clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp | 1 -
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/clang/lib/Parse/ParseHLSLRootSignature.cpp b/clang/lib/Parse/ParseHLSLRootSignature.cpp
index 95935bb8e6424..04fe8d00f25cd 100644
--- a/clang/lib/Parse/ParseHLSLRootSignature.cpp
+++ b/clang/lib/Parse/ParseHLSLRootSignature.cpp
@@ -385,13 +385,13 @@ std::optional<StaticSampler> RootSignatureParser::parseStaticSampler() {
Sampler.MipLODBias = Params->MipLODBias.value();
if (Params->MaxAnisotropy.has_value())
- Sampler.MaxAnisotropy= Params->MaxAnisotropy.value();
+ Sampler.MaxAnisotropy = Params->MaxAnisotropy.value();
if (Params->MinLOD.has_value())
- Sampler.MinLOD= Params->MinLOD.value();
+ Sampler.MinLOD = Params->MinLOD.value();
if (Params->MaxLOD.has_value())
- Sampler.MaxLOD= Params->MaxLOD.value();
+ Sampler.MaxLOD = Params->MaxLOD.value();
if (consumeExpectedToken(TokenKind::pu_r_paren,
diag::err_hlsl_unexpected_end_of_params,
@@ -724,7 +724,7 @@ RootSignatureParser::parseStaticSamplerParams() {
if (consumeExpectedToken(TokenKind::pu_equal))
return std::nullopt;
- auto MinLOD= parseFloatParam();
+ auto MinLOD = parseFloatParam();
if (!MinLOD.has_value())
return std::nullopt;
Params.MinLOD = MinLOD;
@@ -741,7 +741,7 @@ RootSignatureParser::parseStaticSamplerParams() {
if (consumeExpectedToken(TokenKind::pu_equal))
return std::nullopt;
- auto MaxLOD= parseFloatParam();
+ auto MaxLOD = parseFloatParam();
if (!MaxLOD.has_value())
return std::nullopt;
Params.MaxLOD = MaxLOD;
diff --git a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
index b4ed634bb4d75..94e0464ddf03b 100644
--- a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
+++ b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
@@ -267,7 +267,6 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
ASSERT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 9000.f);
-
ASSERT_TRUE(Consumer->isSatisfied());
}
>From b5ffce479ba7320566cd3885159a59ea2f1b6c2f Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Mon, 26 May 2025 20:52:56 +0000
Subject: [PATCH 7/8] review: use EXPECT_FLOAT_EQ
---
clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
index 94e0464ddf03b..717a62b40ee66 100644
--- a/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
+++ b/clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp
@@ -254,8 +254,8 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.Number, 0u);
ASSERT_EQ(std::get<StaticSampler>(Elem).MipLODBias, 0.f);
ASSERT_EQ(std::get<StaticSampler>(Elem).MaxAnisotropy, 16u);
- ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 0.f);
- ASSERT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 3.402823466e+38f);
+ ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MinLOD, 0.f);
+ ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 3.402823466e+38f);
// Check values can be set as expected
Elem = Elements[1];
@@ -264,8 +264,8 @@ TEST_F(ParseHLSLRootSignatureTest, ValidParseStaticSamplerTest) {
ASSERT_EQ(std::get<StaticSampler>(Elem).Reg.Number, 0u);
ASSERT_EQ(std::get<StaticSampler>(Elem).MipLODBias, 230.f);
ASSERT_EQ(std::get<StaticSampler>(Elem).MaxAnisotropy, 3u);
- ASSERT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
- ASSERT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 9000.f);
+ ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MinLOD, 4.2f);
+ ASSERT_FLOAT_EQ(std::get<StaticSampler>(Elem).MaxLOD, 9000.f);
ASSERT_TRUE(Consumer->isSatisfied());
}
>From 30f8bddf8e1e65f5b8c5bc0c5f53adaf9d623a0b Mon Sep 17 00:00:00 2001
From: Finn Plummer <canadienfinn at gmail.com>
Date: Mon, 26 May 2025 21:02:46 +0000
Subject: [PATCH 8/8] review: use defined FLT_MAX
---
llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
index 8ee58b87f5e49..b2f1811d4a337 100644
--- a/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
+++ b/llvm/include/llvm/Frontend/HLSL/HLSLRootSignature.h
@@ -163,7 +163,7 @@ struct StaticSampler {
float MipLODBias = 0.f;
uint32_t MaxAnisotropy = 16;
float MinLOD = 0.f;
- float MaxLOD = 3.402823466e+38f; // FLT_MAX
+ float MaxLOD = std::numeric_limits<float>::max();
};
/// Models RootElement : RootFlags | RootConstants | RootParam
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