From 4f72d66cbe188facdbca176784ee828e896e5921 Mon Sep 17 00:00:00 2001
From: Michael PLATINGS <mplatings@pixelpower.com>
Date: Wed, 24 Feb 2010 10:12:11 +0000
Subject: [PATCH]

---
 .../fbx/fbxMaterialToOsgStateSet.cpp          | 111 ++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 src/osgPlugins/fbx/fbxMaterialToOsgStateSet.cpp

diff --git a/src/osgPlugins/fbx/fbxMaterialToOsgStateSet.cpp b/src/osgPlugins/fbx/fbxMaterialToOsgStateSet.cpp
new file mode 100644
index 000000000..053885328
--- /dev/null
+++ b/src/osgPlugins/fbx/fbxMaterialToOsgStateSet.cpp
@@ -0,0 +1,111 @@
+#include "fbxMaterialToOsgStateSet.h"
+#include <sstream>
+#include <osgDB/ReadFile>
+#include <osgDB/FileUtils>
+#include <osgDB/FileNameUtils>
+
+
+static osg::Texture::WrapMode convertWrap(KFbxTexture::EWrapMode wrap)
+{
+    return wrap == KFbxTexture::eREPEAT ?
+        osg::Texture2D::REPEAT : osg::Texture2D::CLAMP_TO_EDGE;
+}
+
+StateSetContent
+FbxMaterialToOsgStateSet::convert(const KFbxSurfaceMaterial* pFbxMat)
+{
+    KFbxMaterialMap::const_iterator it = _kFbxMaterialMap.find(pFbxMat);
+    if (it != _kFbxMaterialMap.end())
+        return it->second;
+    static int nbMat = 0;
+    osg::ref_ptr<osg::Material> pOsgMat = new osg::Material;
+    osg::ref_ptr<osg::Texture2D> pOsgTex = NULL;
+    pOsgMat->setName(pFbxMat->GetName());
+
+    const KFbxSurfaceLambert* pFbxLambert = dynamic_cast<const KFbxSurfaceLambert*>(pFbxMat);
+
+    const KFbxProperty lProperty = pFbxMat->FindProperty(KFbxSurfaceMaterial::sDiffuse);
+    if (lProperty.IsValid())
+    {
+        int lNbTex = lProperty.GetSrcObjectCount(KFbxTexture::ClassId);
+        for (int lTextureIndex = 0; lTextureIndex < lNbTex; lTextureIndex++)
+        {
+            KFbxTexture* lTexture = KFbxCast<KFbxTexture>(lProperty.GetSrcObject(KFbxTexture::ClassId, lTextureIndex));
+            if (lTexture)
+            {
+                pOsgTex = fbxTextureToOsgTexture(lTexture);
+            }
+
+            //For now only allow 1 texture
+            break;
+        }
+    }
+    if (pFbxLambert)
+    {
+        fbxDouble3 color = pFbxLambert->GetDiffuseColor().Get();
+        double factor = pFbxLambert->GetDiffuseFactor().Get();
+        pOsgMat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(
+            static_cast<float>(color[0] * factor),
+            static_cast<float>(color[1] * factor),
+            static_cast<float>(color[2] * factor),
+            static_cast<float>(1.0 - pFbxLambert->GetTransparencyFactor().Get())));
+
+        color = pFbxLambert->GetAmbientColor().Get();
+        factor = pFbxLambert->GetAmbientFactor().Get();
+        pOsgMat->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(
+            static_cast<float>(color[0] * factor),
+            static_cast<float>(color[1] * factor),
+            static_cast<float>(color[2] * factor),
+            1.0f));
+
+        color = pFbxLambert->GetEmissiveColor().Get();
+        factor = pFbxLambert->GetEmissiveFactor().Get();
+        pOsgMat->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4(
+            static_cast<float>(color[0] * factor),
+            static_cast<float>(color[1] * factor),
+            static_cast<float>(color[2] * factor),
+            1.0f));
+
+        if (const KFbxSurfacePhong* pFbxPhong = dynamic_cast<const KFbxSurfacePhong*>(pFbxLambert))
+        {
+            color = pFbxPhong->GetSpecularColor().Get();
+            factor = pFbxPhong->GetSpecularFactor().Get();
+            pOsgMat->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(
+                static_cast<float>(color[0] * factor),
+                static_cast<float>(color[1] * factor),
+                static_cast<float>(color[2] * factor),
+                1.0f));
+
+            pOsgMat->setShininess(osg::Material::FRONT_AND_BACK,
+                static_cast<float>(pFbxPhong->GetShininess().Get()));
+        }
+    }
+    return std::make_pair(pOsgMat.release(), pOsgTex.release());
+}
+
+osg::ref_ptr<osg::Texture2D>
+FbxMaterialToOsgStateSet::fbxTextureToOsgTexture(const KFbxTexture* fbx)
+{
+    ImageMap::iterator it = _imageMap.find(fbx->GetFileName());
+    if (it != _imageMap.end())
+        return it->second;
+    osg::ref_ptr<osg::Image> pImage = NULL;
+
+    // Warning: fbx->GetRelativeFileName() is relative TO EXECUTION DIR
+    //          fbx->GetFileName() is as stored initially in the FBX
+    if ((pImage = osgDB::readImageFile(osgDB::concatPaths(_dir, fbx->GetFileName()), _options)) ||                // First try "export dir/name"
+        (pImage = osgDB::readImageFile(fbx->GetFileName(), _options)) ||                                        // Then try  "name" (if absolute)
+        (pImage = osgDB::readImageFile(osgDB::concatPaths(_dir, fbx->GetRelativeFileName()), _options)))        // Else try  "current dir/name"
+    {
+        osg::ref_ptr<osg::Texture2D> pOsgTex = new osg::Texture2D;
+        pOsgTex->setImage(pImage.get());
+        pOsgTex->setWrap(osg::Texture2D::WRAP_S, convertWrap(fbx->GetWrapModeU()));
+        pOsgTex->setWrap(osg::Texture2D::WRAP_T, convertWrap(fbx->GetWrapModeV()));
+        _imageMap.insert(std::make_pair(fbx->GetFileName(), pOsgTex.get()));
+        return pOsgTex.release();
+    }
+    else
+    {
+        return NULL;
+    }
+}