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Merge pull request #1558 from assimp/issue_216 

closes https://github.com/assimp/assimp/issues/216: check the area of…
pull/1565/merge
Kim Kulling 2017-11-12 22:42:56 +01:00 committed by GitHub
parent b2b671d8ad 24b728b3ea
commit 98a1b7671d
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 148 additions and 84 deletions
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1
code/FBXBinaryTokenizer.cpp
View File

@ -422,7 +422,6 @@ bool ReadScope(TokenList& output_tokens, const char* input, const char*& cursor,
return true;
}
}
// ------------------------------------------------------------------------------------------------

100
code/FindDegenerates.cpp
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@ -56,35 +56,34 @@ using namespace Assimp;
// ------------------------------------------------------------------------------------------------
// Constructor to be privately used by Importer
FindDegeneratesProcess::FindDegeneratesProcess()
: configRemoveDegenerates (false)
{}
: mConfigRemoveDegenerates( false )
, mConfigCheckAreaOfTriangle( false ){
// empty
}
// ------------------------------------------------------------------------------------------------
// Destructor, private as well
FindDegeneratesProcess::~FindDegeneratesProcess()
{
FindDegeneratesProcess::~FindDegeneratesProcess() {
// nothing to do here
}
// ------------------------------------------------------------------------------------------------
// Returns whether the processing step is present in the given flag field.
bool FindDegeneratesProcess::IsActive( unsigned int pFlags) const
{
bool FindDegeneratesProcess::IsActive( unsigned int pFlags) const {
return 0 != (pFlags & aiProcess_FindDegenerates);
}
// ------------------------------------------------------------------------------------------------
// Setup import configuration
void FindDegeneratesProcess::SetupProperties(const Importer* pImp)
{
void FindDegeneratesProcess::SetupProperties(const Importer* pImp) {
// Get the current value of AI_CONFIG_PP_FD_REMOVE
configRemoveDegenerates = (0 != pImp->GetPropertyInteger(AI_CONFIG_PP_FD_REMOVE,0));
mConfigRemoveDegenerates = (0 != pImp->GetPropertyInteger(AI_CONFIG_PP_FD_REMOVE,0));
mConfigCheckAreaOfTriangle = ( 0 != pImp->GetPropertyInteger(AI_CONFIG_PP_FD_CHECKAREA) );
}
// ------------------------------------------------------------------------------------------------
// Executes the post processing step on the given imported data.
void FindDegeneratesProcess::Execute( aiScene* pScene)
{
void FindDegeneratesProcess::Execute( aiScene* pScene) {
DefaultLogger::get()->debug("FindDegeneratesProcess begin");
for (unsigned int i = 0; i < pScene->mNumMeshes;++i){
ExecuteOnMesh( pScene->mMeshes[ i ] );
@ -92,41 +91,69 @@ void FindDegeneratesProcess::Execute( aiScene* pScene)
DefaultLogger::get()->debug("FindDegeneratesProcess finished");
}
static ai_real heron( ai_real a, ai_real b, ai_real c ) {
ai_real s = (a + b + c) / 2;
ai_real area = pow((s * ( s - a ) * ( s - b ) * ( s - c ) ), 0.5 );
return area;
}
static ai_real distance3D( const aiVector3D &vA, aiVector3D &vB ) {
const ai_real lx = ( vB.x - vA.x );
const ai_real ly = ( vB.y - vA.y );
const ai_real lz = ( vB.z - vA.z );
ai_real a = lx*lx + ly*ly + lz*lz;
ai_real d = pow( a, 0.5 );
return d;
}
static ai_real calculateAreaOfTriangle( const aiFace& face, aiMesh* mesh ) {
ai_real area = 0;
aiVector3D vA( mesh->mVertices[ face.mIndices[ 0 ] ] );
aiVector3D vB( mesh->mVertices[ face.mIndices[ 1 ] ] );
aiVector3D vC( mesh->mVertices[ face.mIndices[ 2 ] ] );
ai_real a( distance3D( vA, vB ) );
ai_real b( distance3D( vB, vC ) );
ai_real c( distance3D( vC, vA ) );
area = heron( a, b, c );
return area;
}
// ------------------------------------------------------------------------------------------------
// Executes the post processing step on the given imported mesh
void FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh)
{
void FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh) {
mesh->mPrimitiveTypes = 0;
std::vector<bool> remove_me;
if (configRemoveDegenerates)
if (mConfigRemoveDegenerates) {
remove_me.resize( mesh->mNumFaces, false );
}
unsigned int deg = 0, limit;
for (unsigned int a = 0; a < mesh->mNumFaces; ++a)
{
for ( unsigned int a = 0; a < mesh->mNumFaces; ++a ) {
aiFace& face = mesh->mFaces[a];
bool first = true;
// check whether the face contains degenerated entries
for (unsigned int i = 0; i < face.mNumIndices; ++i)
{
for (unsigned int i = 0; i < face.mNumIndices; ++i) {
// Polygons with more than 4 points are allowed to have double points, that is
// simulating polygons with holes just with concave polygons. However,
// double points may not come directly after another.
limit = face.mNumIndices;
if (face.mNumIndices > 4)
if (face.mNumIndices > 4) {
limit = std::min( limit, i+2 );
}
for (unsigned int t = i+1; t < limit; ++t)
{
if (mesh->mVertices[face.mIndices[i]] == mesh->mVertices[face.mIndices[t]])
{
for (unsigned int t = i+1; t < limit; ++t) {
if (mesh->mVertices[face.mIndices[ i ] ] == mesh->mVertices[ face.mIndices[ t ] ]) {
// we have found a matching vertex position
// remove the corresponding index from the array
--face.mNumIndices;--limit;
for (unsigned int m = t; m < face.mNumIndices; ++m)
{
--face.mNumIndices;
--limit;
for (unsigned int m = t; m < face.mNumIndices; ++m) {
face.mIndices[ m ] = face.mIndices[ m+1 ];
}
--t;
@ -136,18 +163,31 @@ void FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh)
// application attemps to access this data.
face.mIndices[ face.mNumIndices ] = 0xdeadbeef;
if(first)
{
if(first) {
++deg;
first = false;
}
if (configRemoveDegenerates) {
if ( mConfigRemoveDegenerates ) {
remove_me[ a ] = true;
goto evil_jump_outside; // hrhrhrh ... yeah, this rocks baby!
}
}
}
if ( mConfigCheckAreaOfTriangle ) {
if ( face.mNumIndices == 3 ) {
ai_real area = calculateAreaOfTriangle( face, mesh );
if ( area < 1e-6 ) {
if ( mConfigRemoveDegenerates ) {
remove_me[ a ] = true;
goto evil_jump_outside;
}
// todo: check for index which is corrupt.
}
}
}
}
// We need to update the primitive flags array of the mesh.
@ -171,7 +211,7 @@ evil_jump_outside:
}
// If AI_CONFIG_PP_FD_REMOVE is true, remove degenerated faces from the import
if (configRemoveDegenerates && deg) {
if (mConfigRemoveDegenerates && deg) {
unsigned int n = 0;
for (unsigned int a = 0; a < mesh->mNumFaces; ++a)
{

59
code/FindDegenerates.h
View File

@ -54,15 +54,11 @@ namespace Assimp {
// ---------------------------------------------------------------------------
/** FindDegeneratesProcess: Searches a mesh for degenerated triangles.
*/
class ASSIMP_API FindDegeneratesProcess : public BaseProcess
{
class ASSIMP_API FindDegeneratesProcess : public BaseProcess {
public:
FindDegeneratesProcess();
~FindDegeneratesProcess();
public:
// -------------------------------------------------------------------
// Check whether step is active
bool IsActive( unsigned int pFlags) const;
@ -79,28 +75,53 @@ public:
// Execute step on a given mesh
void ExecuteOnMesh( aiMesh* mesh);
// -------------------------------------------------------------------
/// @brief Enable the instant removal of degenerated primitives
/// @param enabled true for enabled.
void EnableInstantRemoval(bool enabled);
// -------------------------------------------------------------------
/** @brief Enable the instant removal of degenerated primitives
* @param d hm ... difficult to guess what this means, hu!?
*/
void EnableInstantRemoval(bool d) {
configRemoveDegenerates = d;
}
/// @brief Check whether instant removal is currently enabled
/// @return The instant removal state.
bool IsInstantRemoval() const;
// -------------------------------------------------------------------
/** @brief Check whether instant removal is currently enabled
* @return ...
*/
bool IsInstantRemoval() const {
return configRemoveDegenerates;
}
/// @brief Enable the area check for triangles.
/// @param enabled true for enabled.
void EnableAreaCheck( bool enabled );
// -------------------------------------------------------------------
/// @brief Check whether the area check is enabled.
/// @return The area check state.
bool isAreaCheckEnabled() const;
private:
//! Configuration option: remove degenerates faces immediately
bool configRemoveDegenerates;
bool mConfigRemoveDegenerates;
//! Configuration option: check for area
bool mConfigCheckAreaOfTriangle;
};
inline
void FindDegeneratesProcess::EnableInstantRemoval(bool enabled) {
mConfigRemoveDegenerates = enabled;
}
inline
bool FindDegeneratesProcess::IsInstantRemoval() const {
return mConfigRemoveDegenerates;
}
inline
void FindDegeneratesProcess::EnableAreaCheck( bool enabled ) {
mConfigCheckAreaOfTriangle = enabled;
}
inline
bool FindDegeneratesProcess::isAreaCheckEnabled() const {
return mConfigCheckAreaOfTriangle;
}
} // Namespace Assimp
#endif // !! AI_FINDDEGENERATESPROCESS_H_INC

6
code/STLLoader.cpp
View File

@ -207,12 +207,6 @@ void STLImporter::InternReadFile( const std::string& pFile, aiScene* pScene, IOS
throw DeadlyImportError( "Failed to determine STL storage representation for " + pFile + ".");
}
// add all created meshes to the single node
/*pScene->mRootNode->mNumMeshes = pScene->mNumMeshes;
pScene->mRootNode->mMeshes = new unsigned int[pScene->mNumMeshes];
for (unsigned int i = 0; i < pScene->mNumMeshes; i++)
pScene->mRootNode->mMeshes[i] = i;
*/
// create a single default material, using a white diffuse color for consistency with
// other geometric types (e.g., PLY).
aiMaterial* pcMat = new aiMaterial();

8
code/X3DExporter.cpp
View File

@ -240,8 +240,12 @@ list<SAttribute> attr_list;
if((rotate_angle != 0) && (rotate_axis.Length() > 0))
attr_list.push_back({"rotation", Rotation2String(rotate_axis, rotate_angle)});
if(!scale.Equal({1, 1, 1})) attr_list.push_back({"scale", Vector2String(scale)});
if(translate.Length() > 0) attr_list.push_back({"translation", Vector2String(translate)});
if(!scale.Equal({1.0,1.0,1.0})) {
attr_list.push_back({"scale", Vector2String(scale)});
}
if(translate.Length() > 0) {
attr_list.push_back({"translation", Vector2String(translate)});
}
}
// Begin node if need.

5
code/XFileImporter.h
View File

@ -65,14 +65,11 @@ struct Node;
/** The XFileImporter is a worker class capable of importing a scene from a
* DirectX file .x
*/
class XFileImporter : public BaseImporter
{
class XFileImporter : public BaseImporter {
public:
XFileImporter();
~XFileImporter();
public:
// -------------------------------------------------------------------
/** Returns whether the class can handle the format of the given file.
* See BaseImporter::CanRead() for details. */

9
include/assimp/config.h.in
View File

@ -266,6 +266,15 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define AI_CONFIG_PP_FD_REMOVE \
"PP_FD_REMOVE"
// ---------------------------------------------------------------------------
/**
* @brief Configures the #aiProcess_FindDegenerates to check the area of a
* trinagle to be greates than e-6. If this is not the case the triangle will
* be removed if #AI_CONFIG_PP_FD_REMOVE is set to true.
*/
#define AI_CONFIG_PP_FD_CHECKAREA \
"PP_FD_CHECKAREA"
// ---------------------------------------------------------------------------
/** @brief Configures the #aiProcess_OptimizeGraph step to preserve nodes
* matching a name in a given list.

1
include/assimp/vector3.h
View File

@ -65,7 +65,6 @@ template <typename TReal>
class aiVector3t
{
public:
aiVector3t() : x(), y(), z() {}
aiVector3t(TReal _x, TReal _y, TReal _z) : x(_x), y(_y), z(_z) {}
explicit aiVector3t (TReal _xyz ) : x(_xyz), y(_xyz), z(_xyz) {}

23
test/unit/utFindDegenerates.cpp
View File

@ -58,8 +58,7 @@ protected:
};
// ------------------------------------------------------------------------------------------------
void FindDegeneratesProcessTest::SetUp()
{
void FindDegeneratesProcessTest::SetUp() {
mesh = new aiMesh();
process = new FindDegeneratesProcess();
@ -107,16 +106,12 @@ void FindDegeneratesProcessTest::SetUp()
mesh->mNumUVComponents[1] = numFaces;
}
// ------------------------------------------------------------------------------------------------
void FindDegeneratesProcessTest::TearDown()
{
void FindDegeneratesProcessTest::TearDown() {
delete mesh;
delete process;
}
// ------------------------------------------------------------------------------------------------
TEST_F(FindDegeneratesProcessTest, testDegeneratesDetection)
{
TEST_F(FindDegeneratesProcessTest, testDegeneratesDetection) {
process->EnableInstantRemoval(false);
process->ExecuteOnMesh(mesh);
@ -135,12 +130,18 @@ TEST_F(FindDegeneratesProcessTest, testDegeneratesDetection)
mesh->mPrimitiveTypes);
}
// ------------------------------------------------------------------------------------------------
TEST_F(FindDegeneratesProcessTest, testDegeneratesRemoval)
{
TEST_F(FindDegeneratesProcessTest, testDegeneratesRemoval) {
process->EnableAreaCheck(false);
process->EnableInstantRemoval(true);
process->ExecuteOnMesh(mesh);
EXPECT_EQ(mesh->mNumUVComponents[1], mesh->mNumFaces);
}
TEST_F(FindDegeneratesProcessTest, testDegeneratesRemovalWithAreaCheck) {
process->EnableAreaCheck(true);
process->EnableInstantRemoval(true);
process->ExecuteOnMesh(mesh);
EXPECT_EQ(mesh->mNumUVComponents[1]-100, mesh->mNumFaces);
}