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// Copyright (c) 2013, Fabrice Robinet.
// All rights reserved.
//
// Redistribution and use 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.
//
// 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 <COPYRIGHT HOLDER> 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 "GLTF.h"
#include "GLTFFlipUVModifier.h"
using namespace rapidjson;
#if __cplusplus <= 199711L
using namespace std::tr1;
#endif
using namespace std;
namespace GLTF
{
GLTFFlipUVModifier::GLTFFlipUVModifier() {
}
GLTFFlipUVModifier::~GLTFFlipUVModifier() {
}
bool GLTFFlipUVModifier::init() {
return true;
};
static void __InvertV(void *value,
const std::string &componentType,
const std::string &type,
size_t componentsPerElement,
size_t index,
size_t vertexAttributeByteSize,
void *context) {
char* bufferData = (char*)value;
if ((componentType == "FLOAT") && (componentsPerElement > 1)) {
float* vector = (float*)bufferData;
vector[1] = (float) (1.0 - vector[1]);
}
}
void GLTFFlipUVModifier::modify(shared_ptr<JSONObject> glTFAsset) {
if (glTFAsset->contains(kMeshes) == false)
return;
shared_ptr<JSONObject> meshes = glTFAsset->getObject(kMeshes);
std::vector <std::string> meshesUIDs = meshes->getAllKeys();
for (size_t i = 0 ; i < meshesUIDs.size() ; i++) {
shared_ptr<GLTFMesh> mesh = static_pointer_cast<GLTFMesh>(meshes->getObject(meshesUIDs[i]));
if (mesh->hasSemantic(GLTF::TEXCOORD)) {
//https://github.com/KhronosGroup/collada2json/issues/41
size_t attributesCount = mesh->getMeshAttributesCountForSemantic(GLTF::TEXCOORD);
for (size_t k = 0 ; k < attributesCount ; k++) {
shared_ptr <GLTF::GLTFAccessor> meshAttribute = mesh->getMeshAttribute(GLTF::TEXCOORD, k);
meshAttribute->applyOnAccessor(__InvertV, NULL);
}
}
}
}
void GLTFFlipUVModifier::cleanup() {
}
}
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