closes https://github.com/assimp/assimp/issues/1514: add postprocess step for scaling

code/ScaleProcess.cpp

@@ -0,0 +1,93 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2017, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+#include "ScaleProcess.h"
+#include <assimp/scene.h>
+
+namespace Assimp {
+
+ScaleProcess::ScaleProcess()
+: BaseProcess()
+, mScale( 1.0f ) {
+    // empty
+}
+
+ScaleProcess::~ScaleProcess() {
+    // empty
+}
+
+void ScaleProcess::setScale( ai_real scale ) {
+    mScale = scale;
+}
+
+ai_real ScaleProcess::getScale() const {
+    return mScale;
+}
+
+bool ScaleProcess::IsActive( unsigned int pFlags ) const {
+    return true;
+}
+
+void ScaleProcess::SetupProperties( const Importer* pImp ) {
+    mScale = pImp->GetPropertyFloat( AI_CONFIG_GLOBAL_SCALE_FACTOR_KEY, AI_CONFIG_GLOBAL_SCALE_FACTOR_DEFAULT );
+}
+
+void ScaleProcess::Execute( aiScene* pScene ) {
+    if ( nullptr == pScene ) {
+        return;
+    }
+
+    if ( nullptr == pScene->mRootNode ) {
+        return;
+    }
+
+    for ( unsigned int i = 0; i < pScene->mRootNode->mNumChildren; ++i ) {
+        aiNode *currentNode = pScene->mRootNode->mChildren[ i ];
+        if ( nullptr != currentNode ) {
+            applyScaling( currentNode );
+        }
+    }
+}
+
+void ScaleProcess::applyScaling( aiNode *currentNode ) {
+    currentNode->mTransformation = currentNode->mTransformation * mScale;
+}
+
+} // Namespace Assimp