From 56bf755c4beadd0a7e14d3723a976feef5e9234a Mon Sep 17 00:00:00 2001
From: aramis_acg <aramis_acg@67173fc5-114c-0410-ac8e-9d2fd5bffc1f>
Date: Thu, 12 Jul 2012 00:20:28 +0000
Subject: [PATCH] - Ifc: fix handling of curves with RADIAN parameters.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@1289 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
---
 code/IFCCurve.cpp  | 23 ++++++++++++++---------
 code/IFCLoader.cpp |  2 +-
 code/IFCUtil.h     |  2 +-
 3 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/code/IFCCurve.cpp b/code/IFCCurve.cpp
index 4d9f499e0..fab256f6a 100644
--- a/code/IFCCurve.cpp
+++ b/code/IFCCurve.cpp
@@ -85,14 +85,18 @@ public:
 	size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
 		ai_assert(InRange(a) && InRange(b));
 
-		a = fmod(a,static_cast<IfcFloat>( 360. ));
-		b = fmod(b,static_cast<IfcFloat>( 360. ));
-		return static_cast<size_t>( abs(ceil(( b-a)) / conv.settings.conicSamplingAngle) );
+		a *= conv.angle_scale;
+		b *= conv.angle_scale;
+
+		a = fmod(a,static_cast<IfcFloat>( AI_MATH_TWO_PI ));
+		b = fmod(b,static_cast<IfcFloat>( AI_MATH_TWO_PI ));
+		const IfcFloat setting = static_cast<IfcFloat>( AI_MATH_PI * conv.settings.conicSamplingAngle / 180.0 );
+		return static_cast<size_t>( ceil(abs( b-a)) / setting);
 	}
 
 	// --------------------------------------------------
 	ParamRange GetParametricRange() const {
-		return std::make_pair(static_cast<IfcFloat>( 0. ), static_cast<IfcFloat>( 360. ));
+		return std::make_pair(static_cast<IfcFloat>( 0. ), static_cast<IfcFloat>( AI_MATH_TWO_PI / conv.angle_scale ));
 	}
 
 protected:
@@ -272,7 +276,7 @@ public:
 		IfcFloat acc = 0;
 		BOOST_FOREACH(const CurveEntry& entry, curves) {
 			const ParamRange& range = entry.first->GetParametricRange();
-			const IfcFloat delta = range.second-range.first;
+			const IfcFloat delta = abs(range.second-range.first);
 			if (u < acc+delta) {
 				return entry.first->Eval( entry.second ? (u-acc) + range.first : range.second-(u-acc));
 			}
@@ -291,7 +295,7 @@ public:
 		IfcFloat acc = 0;
 		BOOST_FOREACH(const CurveEntry& entry, curves) {
 			const ParamRange& range = entry.first->GetParametricRange();
-			const IfcFloat delta = range.second-range.first;
+			const IfcFloat delta = abs(range.second-range.first);
 			if (a <= acc+delta && b >= acc) {
 				const IfcFloat at =  std::max(static_cast<IfcFloat>( 0. ),a-acc), bt = std::min(delta,b-acc);
 				cnt += entry.first->EstimateSampleCount( entry.second ? at + range.first : range.second - bt, entry.second ? bt + range.first : range.second - at );
@@ -552,8 +556,9 @@ bool Curve :: InRange(IfcFloat u) const
 {
 	const ParamRange range = GetParametricRange();
 	if (IsClosed()) {
-		ai_assert(range.first != std::numeric_limits<IfcFloat>::infinity() && range.second != std::numeric_limits<IfcFloat>::infinity());
-		u = range.first + fmod(u-range.first,range.second-range.first);
+		return true;
+		//ai_assert(range.first != std::numeric_limits<IfcFloat>::infinity() && range.second != std::numeric_limits<IfcFloat>::infinity());
+		//u = range.first + fmod(u-range.first,range.second-range.first);
 	}
 	const IfcFloat epsilon = 1e-5;
 	return u - range.first > -epsilon && range.second - u > -epsilon;
@@ -564,7 +569,7 @@ bool Curve :: InRange(IfcFloat u) const
 IfcFloat Curve :: GetParametricRangeDelta() const
 {
 	const ParamRange& range = GetParametricRange();
-	return range.second - range.first;
+	return abs(range.second - range.first);
 }
 
 // ------------------------------------------------------------------------------------------------
diff --git a/code/IFCLoader.cpp b/code/IFCLoader.cpp
index b4ef88aee..add16565a 100644
--- a/code/IFCLoader.cpp
+++ b/code/IFCLoader.cpp
@@ -154,7 +154,7 @@ void IFCImporter::SetupProperties(const Importer* pImp)
 	settings.skipCurveRepresentations = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_SKIP_CURVE_REPRESENTATIONS,true);
 	settings.useCustomTriangulation = pImp->GetPropertyBool(AI_CONFIG_IMPORT_IFC_CUSTOM_TRIANGULATION,true);
 
-	settings.conicSamplingAngle = 5.f;
+	settings.conicSamplingAngle = 10.f;
 	settings.skipAnnotations = true;
 }
 
diff --git a/code/IFCUtil.h b/code/IFCUtil.h
index 669befea4..a8fe6f680 100644
--- a/code/IFCUtil.h
+++ b/code/IFCUtil.h
@@ -100,7 +100,7 @@ struct ConversionData
 {
 	ConversionData(const STEP::DB& db, const IFC::IfcProject& proj, aiScene* out,const IFCImporter::Settings& settings)
 		: len_scale(1.0)
-		, angle_scale(1.0)
+		, angle_scale(-1.0)
 		, db(db)
 		, proj(proj)
 		, out(out)