// Load a 3D Studio MAX model and convert its vertex and texture coordinates
// from 3DS' right-handed coordinate system to Aleph One's left-handed system.
bool LoadModel_Studio_RightHand(FileSpecifier& Spec, Model3D& Model)
{
bool Result = LoadModel_Studio(Spec, Model);
if (!Result) return Result;
logTrace("Converting handedness.");
// Wings 3d and Blender produce 3DS models with a z-up orientation,
// and for Blender models y increases towards the back. In Aleph One,
// z increases upward, and items that have been placed with 0 degrees
// of rotation face in the positive-x direction.
// Preserve the orientation and switch handedness by swapping and
// flipping x and y.
for (unsigned XPos = 0; XPos < Model.Positions.size(); XPos += 3)
{
GLfloat X = Model.Positions[XPos];
Model.Positions[XPos] = -Model.Positions[XPos + 1];
Model.Positions[XPos + 1] = -X;
}
// Put the vertices of faces back into clockwise order.
for (unsigned IPos = 0; IPos < Model.VertIndices.size(); IPos += 3)
{
int Index = Model.VertIndices[IPos + 1];
Model.VertIndices[IPos + 1] = Model.VertIndices[IPos];
Model.VertIndices[IPos] = Index;
}
// Switch texture coordinates from right-handed (x,y) to
// left-handed (row,column).
for (unsigned YPos = 1; YPos < Model.TxtrCoords.size(); YPos += 2)
{
Model.TxtrCoords[YPos] = 1.0 - Model.TxtrCoords[YPos];
}
return true;
}
void OGL_ModelData::Load()
{
// Already loaded?
if (ModelPresent()) {
return;
}
// Load the model
Model.Clear();
if (ModelFile == FileSpecifier()) {
return;
}
if (!ModelFile.Exists()) {
return;
}
bool Success = false;
char *Type = &ModelType[0];
if (StringsEqual(Type,"wave",4)) {
// Alias|Wavefront
Success = LoadModel_Wavefront(ModelFile, Model);
}
else if (StringsEqual(Type,"3ds",3)) {
// 3D Studio Max
Success = LoadModel_Studio(ModelFile, Model);
}
else if (StringsEqual(Type,"dim3",4)) {
// Brian Barnes's "Dim3" model format (first pass: model geometry)
Success = LoadModel_Dim3(ModelFile, Model, LoadModelDim3_First);
// Second and third passes: frames and sequences
try
{
if (ModelFile1 == FileSpecifier()) {
throw 0;
}
if (!ModelFile1.Exists()) {
throw 0;
}
if (!LoadModel_Dim3(ModelFile1, Model, LoadModelDim3_Rest)) {
throw 0;
}
}
catch(...)
{}
//
try
{
if (ModelFile2 == FileSpecifier()) {
throw 0;
}
if (!ModelFile2.Exists()) {
throw 0;
}
if (!LoadModel_Dim3(ModelFile2, Model, LoadModelDim3_Rest)) {
throw 0;
}
}
catch(...)
{}
}
#if HAVE_QUESA
else if (StringsEqual(Type,
"qd3d") ||
StringsEqual(Type,"3dmf") || StringsEqual(Type,"quesa")) {
// QuickDraw 3D / Quesa
Success = LoadModel_QD3D(ModelFile, Model);
}
#endif
if (!Success) {
Model.Clear();
return;
}
// Calculate transformation matrix
GLfloat Angle, Cosine, Sine;
GLfloat RotMatrix[3][3], NewRotMatrix[3][3], IndivRotMatrix[3][3];
MatIdentity(RotMatrix);
MatIdentity(IndivRotMatrix);
Angle = (float)Degree2Radian*XRot;
Cosine = (float)cos(Angle);
Sine = (float)sin(Angle);
IndivRotMatrix[1][1] = Cosine;
IndivRotMatrix[1][2] = -Sine;
IndivRotMatrix[2][1] = Sine;
IndivRotMatrix[2][2] = Cosine;
MatMult(IndivRotMatrix,RotMatrix,NewRotMatrix);
MatCopy(NewRotMatrix,RotMatrix);
MatIdentity(IndivRotMatrix);
Angle = (float)Degree2Radian*YRot;
Cosine = (float)cos(Angle);
Sine = (float)sin(Angle);
IndivRotMatrix[2][2] = Cosine;
IndivRotMatrix[2][0] = -Sine;
IndivRotMatrix[0][2] = Sine;
IndivRotMatrix[0][0] = Cosine;
MatMult(IndivRotMatrix,RotMatrix,NewRotMatrix);
MatCopy(NewRotMatrix,RotMatrix);
MatIdentity(IndivRotMatrix);
Angle = (float)Degree2Radian*ZRot;
Cosine = (float)cos(Angle);
Sine = (float)sin(Angle);
IndivRotMatrix[0][0] = Cosine;
IndivRotMatrix[0][1] = -Sine;
IndivRotMatrix[1][0] = Sine;
IndivRotMatrix[1][1] = Cosine;
MatMult(IndivRotMatrix,RotMatrix,NewRotMatrix);
MatCopy(NewRotMatrix,RotMatrix);
MatScalMult(NewRotMatrix,Scale); // For the position vertices
if (Scale < 0) {
MatScalMult(RotMatrix,-1); // For the normals
}
// Is model animated or static?
// Test by trying to find neutral positions (useful for working with the normals later on)
if (Model.FindPositions_Neutral(false)) {
// Copy over the vector and normal transformation matrices:
for (int k=0; k<3; k++)
for (int l=0; l<3; l++)
{
Model.TransformPos.M[k][l] = NewRotMatrix[k][l];
Model.TransformNorm.M[k][l] = RotMatrix[k][l];
}
Model.TransformPos.M[0][3] = XShift;
Model.TransformPos.M[1][3] = YShift;
Model.TransformPos.M[2][3] = ZShift;
// Find the transformed bounding box:
bool RestOfCorners = false;
GLfloat NewBoundingBox[2][3];
// The indices i1, i2, and i3 are for selecting which of the box's two principal corners
// to get coordinates from
for (int i1=0; i1<2; i1++)
{
GLfloat X = Model.BoundingBox[i1][0];
for (int i2=0; i2<2; i2++)
{
GLfloat Y = Model.BoundingBox[i2][0];
for (int i3=0; i3<2; i3++)
{
GLfloat Z = Model.BoundingBox[i3][0];
GLfloat Corner[3];
for (int ic=0; ic<3; ic++)
{
GLfloat *Row = Model.TransformPos.M[ic];
Corner[ic] = Row[0]*X + Row[1]*Y + Row[2]*Z + Row[3];
}
if (RestOfCorners) {
// Find minimum and maximum for each coordinate
for (int ic=0; ic<3; ic++)
{
NewBoundingBox[0][ic] = min(NewBoundingBox[0][ic],Corner[ic]);
NewBoundingBox[1][ic] = max(NewBoundingBox[1][ic],Corner[ic]);
}
}
else
{
// Simply copy it in:
for (int ic=0; ic<3; ic++)
NewBoundingBox[0][ic] = NewBoundingBox[1][ic] = Corner[ic];
RestOfCorners = true;
}
}
}
}
for (int ic=0; ic<2; ic++)
objlist_copy(Model.BoundingBox[ic],NewBoundingBox[ic],3);
}
else
{
// Static model
size_t NumVerts = Model.Positions.size()/3;
for (size_t k=0; k<NumVerts; k++)
{
GLfloat *Pos = Model.PosBase() + 3*k;
GLfloat NewPos[3];
MatVecMult(NewRotMatrix,Pos,NewPos); // Has the scaling
Pos[0] = NewPos[0] + XShift;
Pos[1] = NewPos[1] + YShift;
Pos[2] = NewPos[2] + ZShift;
}
size_t NumNorms = Model.Normals.size()/3;
for (size_t k=0; k<NumNorms; k++)
{
GLfloat *Norms = Model.NormBase() + 3*k;
GLfloat NewNorms[3];
MatVecMult(RotMatrix,Norms,NewNorms); // Not scaled
objlist_copy(Norms,NewNorms,3);
}
// So as to be consistent with the new points
Model.FindBoundingBox();
}
Model.AdjustNormals(NormalType,NormalSplit);
Model.CalculateTangents();
// Don't forget the skins
OGL_SkinManager::Load();
}
