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blender-archive/source/blender/freestyle/intern/blender_interface/BlenderFileLoader.cpp

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#include "BlenderFileLoader.h"
#include <assert.h>
SUMMARY: Freestyle's pipeline is now fully controllable at the layer level. It can be used: - in any render layer - with as many style modules per layer DETAILS: Freestyle usage has not changed: - all the configuration happens in the "Freestyle" render panel, after it is enabled in the "Output" panel with the 'Freestyle' toggle. - each render layer can choose to render Freestyle strokes by togglingo on 'FrSt' (in the "Render Layers" panel) - it is fully compatible with compositor nodes In the "Freestyle" panel, a render layer is selected via the menu list next to the "Render Layer:" label. The options displayed below are those of the currently selected render layer (and are not global to all render layers, as was previously the case). Style modules are added by pressing the lower button "Add style module". Once added, the following operations are possible: - deletion (cross) - reordering (up/down arrows) - toggling of display (check) The order of the style modules follows Freestyle's original convention: the modules in the list from top to bottom are respectively the first to the last composited in the render layer. For example, if the module list is "contour" followed by "cartoon", the "cartoon" strokes are rendered on top of the "contour" strokes. The "Freestyle" panel is constantly synchronized with the "Render Layers" panel: if render layers are added, deleted or toggled off display, Freestyle will take note of the changes. The current pipeline works as follows: ---------------------------------------------------------------------------------------------- for every scene that is being rendered if Freestyle is enabled globally Freestyle is initialized camera and view settings are transferred from Blender to Freestyle for every render layer if: - layer is enabled - layer enabled Freestyle - the number of displayed style modules is non-zero canvas is cleared geometry is transferred from Blender to Freestyle settings are fixed for current iteration view map is calculated strokes are computed in the canvas (based on view map and style modules) strokes are rendered in separate Blender scene scene is composited in current layer ---------------------------------------------------------------------------------------------- A number of changes were made on the codebase: - the rendering interface between Freestyle and Blender was simplified. The following naming convention was used: functions that are called from within Blender pipeline are prefixed with 'FRS_', while the variables are prefixed with 'freestyle_' - Freestyle data structures that were put in Blender's render pipeline were removed - Freestyle cleans up its data structures on Blender exit and shouldn't leak memory - to ease the configuration in the "Freestyle" panel, a centralized configuration data structure was used and can be easily extended LIMITATIONS Even though the current commit is stable and achieves the intended result, it is not as efficient as it could be: - the canvas and the style modules are at cleared at each layer-level render - geometry is reloaded at each frame and is duplicated across render layers This revision clarifies my understanding of the future role of the view map in the compositor. Unfortunately, contrary to what the original proposal said, it is impossible to provide the view map as a render pass because render passes are defined (RE_pipeline.h) as raw floating-point rects. We will have to determine whether or not to extend the notion of render pass to fully integrate the view map in the compositor.
2009-04-07 18:38:23 +00:00
BlenderFileLoader::BlenderFileLoader(Render *re, SceneRenderLayer* srl)
{
_re = re;
SUMMARY: Freestyle's pipeline is now fully controllable at the layer level. It can be used: - in any render layer - with as many style modules per layer DETAILS: Freestyle usage has not changed: - all the configuration happens in the "Freestyle" render panel, after it is enabled in the "Output" panel with the 'Freestyle' toggle. - each render layer can choose to render Freestyle strokes by togglingo on 'FrSt' (in the "Render Layers" panel) - it is fully compatible with compositor nodes In the "Freestyle" panel, a render layer is selected via the menu list next to the "Render Layer:" label. The options displayed below are those of the currently selected render layer (and are not global to all render layers, as was previously the case). Style modules are added by pressing the lower button "Add style module". Once added, the following operations are possible: - deletion (cross) - reordering (up/down arrows) - toggling of display (check) The order of the style modules follows Freestyle's original convention: the modules in the list from top to bottom are respectively the first to the last composited in the render layer. For example, if the module list is "contour" followed by "cartoon", the "cartoon" strokes are rendered on top of the "contour" strokes. The "Freestyle" panel is constantly synchronized with the "Render Layers" panel: if render layers are added, deleted or toggled off display, Freestyle will take note of the changes. The current pipeline works as follows: ---------------------------------------------------------------------------------------------- for every scene that is being rendered if Freestyle is enabled globally Freestyle is initialized camera and view settings are transferred from Blender to Freestyle for every render layer if: - layer is enabled - layer enabled Freestyle - the number of displayed style modules is non-zero canvas is cleared geometry is transferred from Blender to Freestyle settings are fixed for current iteration view map is calculated strokes are computed in the canvas (based on view map and style modules) strokes are rendered in separate Blender scene scene is composited in current layer ---------------------------------------------------------------------------------------------- A number of changes were made on the codebase: - the rendering interface between Freestyle and Blender was simplified. The following naming convention was used: functions that are called from within Blender pipeline are prefixed with 'FRS_', while the variables are prefixed with 'freestyle_' - Freestyle data structures that were put in Blender's render pipeline were removed - Freestyle cleans up its data structures on Blender exit and shouldn't leak memory - to ease the configuration in the "Freestyle" panel, a centralized configuration data structure was used and can be easily extended LIMITATIONS Even though the current commit is stable and achieves the intended result, it is not as efficient as it could be: - the canvas and the style modules are at cleared at each layer-level render - geometry is reloaded at each frame and is duplicated across render layers This revision clarifies my understanding of the future role of the view map in the compositor. Unfortunately, contrary to what the original proposal said, it is impossible to provide the view map as a render pass because render passes are defined (RE_pipeline.h) as raw floating-point rects. We will have to determine whether or not to extend the notion of render pass to fully integrate the view map in the compositor.
2009-04-07 18:38:23 +00:00
_srl = srl;
_Scene = NULL;
_numFacesRead = 0;
_minEdgeSize = DBL_MAX;
}
BlenderFileLoader::~BlenderFileLoader()
{
_Scene = NULL;
}
NodeGroup* BlenderFileLoader::Load()
{
ObjectInstanceRen *obi;
2008-12-10 22:06:27 +00:00
cout << "\n=== Importing triangular meshes into Blender ===" << endl;
// creation of the scene root node
_Scene = new NodeGroup;
_viewplane_left= _re->viewplane.xmin;
_viewplane_right= _re->viewplane.xmax;
_viewplane_bottom= _re->viewplane.ymin;
_viewplane_top= _re->viewplane.ymax;
_z_near= -_re->clipsta;
_z_far= -_re->clipend;
#if 0
cout << "frustrum: l " << _viewplane_left << " r " << _viewplane_right
<< " b " << _viewplane_bottom << " t " << _viewplane_top
<< " n " << _z_near << " f " << _z_far << endl;
#endif
int id = 0;
for(obi= (ObjectInstanceRen *) _re->instancetable.first; obi; obi=obi->next) {
SUMMARY: Freestyle's pipeline is now fully controllable at the layer level. It can be used: - in any render layer - with as many style modules per layer DETAILS: Freestyle usage has not changed: - all the configuration happens in the "Freestyle" render panel, after it is enabled in the "Output" panel with the 'Freestyle' toggle. - each render layer can choose to render Freestyle strokes by togglingo on 'FrSt' (in the "Render Layers" panel) - it is fully compatible with compositor nodes In the "Freestyle" panel, a render layer is selected via the menu list next to the "Render Layer:" label. The options displayed below are those of the currently selected render layer (and are not global to all render layers, as was previously the case). Style modules are added by pressing the lower button "Add style module". Once added, the following operations are possible: - deletion (cross) - reordering (up/down arrows) - toggling of display (check) The order of the style modules follows Freestyle's original convention: the modules in the list from top to bottom are respectively the first to the last composited in the render layer. For example, if the module list is "contour" followed by "cartoon", the "cartoon" strokes are rendered on top of the "contour" strokes. The "Freestyle" panel is constantly synchronized with the "Render Layers" panel: if render layers are added, deleted or toggled off display, Freestyle will take note of the changes. The current pipeline works as follows: ---------------------------------------------------------------------------------------------- for every scene that is being rendered if Freestyle is enabled globally Freestyle is initialized camera and view settings are transferred from Blender to Freestyle for every render layer if: - layer is enabled - layer enabled Freestyle - the number of displayed style modules is non-zero canvas is cleared geometry is transferred from Blender to Freestyle settings are fixed for current iteration view map is calculated strokes are computed in the canvas (based on view map and style modules) strokes are rendered in separate Blender scene scene is composited in current layer ---------------------------------------------------------------------------------------------- A number of changes were made on the codebase: - the rendering interface between Freestyle and Blender was simplified. The following naming convention was used: functions that are called from within Blender pipeline are prefixed with 'FRS_', while the variables are prefixed with 'freestyle_' - Freestyle data structures that were put in Blender's render pipeline were removed - Freestyle cleans up its data structures on Blender exit and shouldn't leak memory - to ease the configuration in the "Freestyle" panel, a centralized configuration data structure was used and can be easily extended LIMITATIONS Even though the current commit is stable and achieves the intended result, it is not as efficient as it could be: - the canvas and the style modules are at cleared at each layer-level render - geometry is reloaded at each frame and is duplicated across render layers This revision clarifies my understanding of the future role of the view map in the compositor. Unfortunately, contrary to what the original proposal said, it is impossible to provide the view map as a render pass because render passes are defined (RE_pipeline.h) as raw floating-point rects. We will have to determine whether or not to extend the notion of render pass to fully integrate the view map in the compositor.
2009-04-07 18:38:23 +00:00
if (!(obi->lay & _re->scene->lay & _srl->lay))
continue;
char *name = obi->ob->id.name;
//cout << name[0] << name[1] << ":" << (name+2) <<;
//print_m4("obi->mat", obi->mat);
if( obi->obr->totvlak > 0)
insertShapeNode(obi, ++id);
else
cout << "Warning: " << (name+2) << " is not a vlak-based object (ignored)" << endl;
}
//Returns the built scene.
return _Scene;
}
#define CLIPPED_BY_NEAR -1
#define NOT_CLIPPED 0
#define CLIPPED_BY_FAR 1
// check if each vertex of a triangle (V1, V2, V3) is clipped by the near/far plane
// and calculate the number of triangles to be generated by clipping
int BlenderFileLoader::countClippedFaces(float v1[3], float v2[3], float v3[3], int clip[3])
{
float *v[3];
int numClipped, sum, numTris;
v[0] = v1;
v[1] = v2;
v[2] = v3;
numClipped = sum = 0;
for (int i = 0; i < 3; i++) {
if (v[i][2] > _z_near) {
clip[i] = CLIPPED_BY_NEAR;
numClipped++;
} else if (v[i][2] < _z_far) {
clip[i] = CLIPPED_BY_FAR;
numClipped++;
} else {
clip[i] = NOT_CLIPPED;
}
// printf("%d %s\n", i, (clip[i] == NOT_CLIPPED) ? "not" : (clip[i] == CLIPPED_BY_NEAR) ? "near" : "far");
sum += clip[i];
}
switch (numClipped) {
case 0:
numTris = 1; // triangle
break;
case 1:
numTris = 2; // tetragon
break;
case 2:
if (sum == 0)
numTris = 3; // pentagon
else
numTris = 1; // triangle
break;
case 3:
if (sum == 3 || sum == -3)
numTris = 0;
else
numTris = 2; // tetragon
break;
}
return numTris;
}
// find the intersection point C between the line segment from V1 to V2 and
// a clipping plane at depth Z (i.e., the Z component of C is known, while
// the X and Y components are unknown).
void BlenderFileLoader::clipLine(float v1[3], float v2[3], float c[3], float z)
{
double d[3];
for (int i = 0; i < 3; i++)
d[i] = v2[i] - v1[i];
double t = (z - v1[2]) / d[2];
c[0] = v1[0] + t * d[0];
c[1] = v1[1] + t * d[1];
c[2] = z;
}
// clip the triangle (V1, V2, V3) by the near and far clipping plane and
// obtain a set of vertices after the clipping. The number of vertices
// is at most 5.
void BlenderFileLoader::clipTriangle(int numTris, float triCoords[][3], float v1[3], float v2[3], float v3[3], int clip[3])
{
float *v[3];
int i, j, k;
v[0] = v1;
v[1] = v2;
v[2] = v3;
k = 0;
for (i = 0; i < 3; i++) {
j = (i + 1) % 3;
if (clip[i] == NOT_CLIPPED) {
copy_v3_v3(triCoords[k++], v[i]);
if (clip[j] != NOT_CLIPPED) {
clipLine(v[i], v[j], triCoords[k++], (clip[j] == CLIPPED_BY_NEAR) ? _z_near : _z_far);
}
} else if (clip[i] != clip[j]) {
if (clip[j] == NOT_CLIPPED) {
clipLine(v[i], v[j], triCoords[k++], (clip[i] == CLIPPED_BY_NEAR) ? _z_near : _z_far);
} else {
clipLine(v[i], v[j], triCoords[k++], (clip[i] == CLIPPED_BY_NEAR) ? _z_near : _z_far);
clipLine(v[i], v[j], triCoords[k++], (clip[j] == CLIPPED_BY_NEAR) ? _z_near : _z_far);
}
}
}
assert (k == 2 + numTris);
}
void BlenderFileLoader::addTriangle(struct LoaderState *ls, float v1[3], float v2[3], float v3[3])
{
float v12[3], v13[3], n[3];
float *fv[3], len;
unsigned i, j;
// initialize the bounding box by the first vertex
if (ls->currentIndex == 0) {
copy_v3_v3(ls->minBBox, v1);
copy_v3_v3(ls->maxBBox, v1);
}
// compute the normal of the triangle
sub_v3_v3v3(v12, v1, v2);
sub_v3_v3v3(v13, v1, v3);
cross_v3_v3v3(n, v12, v13);
normalize_v3(n);
fv[0] = v1;
fv[1] = v2;
fv[2] = v3;
for (i = 0; i < 3; i++) {
copy_v3_v3(ls->pv, fv[i]);
copy_v3_v3(ls->pn, n);
// update the bounding box
for (j = 0; j < 3; j++)
{
if (ls->minBBox[j] > ls->pv[j])
ls->minBBox[j] = ls->pv[j];
if (ls->maxBBox[j] < ls->pv[j])
ls->maxBBox[j] = ls->pv[j];
}
len = len_v3v3(fv[i], fv[(i + 1) % 3]);
if (_minEdgeSize > len)
_minEdgeSize = len;
*ls->pvi = ls->currentIndex;
*ls->pni = ls->currentIndex;
*ls->pmi = ls->currentMIndex;
ls->currentIndex +=3;
ls->pv += 3;
ls->pn += 3;
ls->pvi++;
ls->pni++;
ls->pmi++;
}
}
void BlenderFileLoader::insertShapeNode(ObjectInstanceRen *obi, int id)
{
ObjectRen *obr = obi->obr;
// We parse vlak nodes and count the number of faces after the clipping by
// the near and far view planes is applied (Note: mesh vertices are in the
// camera coordinate system).
VlakRen *vlr;
unsigned numFaces = 0;
float v1[3], v2[3], v3[3], v4[3];
int clip_1[3], clip_2[3];
for(int a=0; a < obr->totvlak; a++) {
if((a & 255)==0) vlr= obr->vlaknodes[a>>8].vlak;
else vlr++;
copy_v3_v3(v1, vlr->v1->co);
copy_v3_v3(v2, vlr->v2->co);
copy_v3_v3(v3, vlr->v3->co);
if (vlr->v4) copy_v3_v3(v4, vlr->v4->co);
if (obi->flag & R_TRANSFORMED) {
mul_m4_v3(obi->mat, v1);
mul_m4_v3(obi->mat, v2);
mul_m4_v3(obi->mat, v3);
if (vlr->v4) mul_m4_v3(obi->mat, v4);
}
// print_v3("v1", v1);
// print_v3("v2", v2);
// print_v3("v3", v3);
// if (vlr->v4) print_v3("v4", v4);
numFaces += countClippedFaces(v1, v2, v3, clip_1);
if (vlr->v4)
numFaces += countClippedFaces(v1, v3, v4, clip_2);
}
// cout <<"numFaces " <<numFaces<<endl;
if (numFaces == 0)
return;
// We allocate memory for the meshes to be imported
NodeTransform *currentMesh = new NodeTransform;
NodeShape * shape = new NodeShape;
unsigned vSize = 3*3*numFaces;
float *vertices = new float[vSize];
unsigned nSize = vSize;
float *normals = new float[nSize];
unsigned *numVertexPerFaces = new unsigned[numFaces];
vector<FrsMaterial> meshFrsMaterials;
IndexedFaceSet::TRIANGLES_STYLE *faceStyle = new IndexedFaceSet::TRIANGLES_STYLE[numFaces];
unsigned i;
for (i = 0; i <numFaces; i++) {
faceStyle[i] = IndexedFaceSet::TRIANGLES;
numVertexPerFaces[i] = 3;
}
unsigned viSize = 3*numFaces;
unsigned *VIndices = new unsigned[viSize];
unsigned niSize = viSize;
unsigned *NIndices = new unsigned[niSize];
unsigned *MIndices = new unsigned[viSize]; // Material Indices
struct LoaderState ls;
ls.pv = vertices;
ls.pn = normals;
ls.pvi = VIndices;
ls.pni = NIndices;
ls.pmi = MIndices;
ls.currentIndex = 0;
ls.currentMIndex = 0;
FrsMaterial tmpMat;
// We parse the vlak nodes again and import meshes while applying the clipping
// by the near and far view planes.
int p;
for(p=0; p < obr->totvlak; ++p) // we parse the faces of the mesh
{
// Lib3dsFace *f=&mesh->faceL[p];
// Lib3dsMaterial *mat=0;
if((p & 255)==0) vlr = obr->vlaknodes[p>>8].vlak;
else vlr++;
copy_v3_v3(v1, vlr->v1->co);
copy_v3_v3(v2, vlr->v2->co);
copy_v3_v3(v3, vlr->v3->co);
if (vlr->v4) copy_v3_v3(v4, vlr->v4->co);
if (obi->flag & R_TRANSFORMED) {
mul_m4_v3(obi->mat, v1);
mul_m4_v3(obi->mat, v2);
mul_m4_v3(obi->mat, v3);
if (vlr->v4) mul_m4_v3(obi->mat, v4);
}
unsigned numTris_1, numTris_2;
numTris_1 = countClippedFaces(v1, v2, v3, clip_1);
numTris_2 = (vlr->v4) ? countClippedFaces(v1, v3, v4, clip_2) : 0;
if (numTris_1 == 0 && numTris_2 == 0)
continue;
Material *mat = vlr->mat;
if (mat)
{
tmpMat.setDiffuse( mat->r, mat->g, mat->b, mat->alpha );
tmpMat.setSpecular( mat->specr, mat->specg, mat->specb, mat->spectra);
float s = 1.0 * (mat->har + 1) / 4 ; // in Blender: [1;511] => in OpenGL: [0;128]
if(s > 128.f)
s = 128.f;
tmpMat.setShininess(s);
}
if(meshFrsMaterials.empty())
{
meshFrsMaterials.push_back(tmpMat);
shape->setFrsMaterial(tmpMat);
} else {
// find if the material is aleady in the list
unsigned i=0;
bool found = false;
for(vector<FrsMaterial>::iterator it=meshFrsMaterials.begin(), itend=meshFrsMaterials.end();
it!=itend;
++it){
if(*it == tmpMat){
ls.currentMIndex = i;
found = true;
break;
}
++i;
}
if(!found){
meshFrsMaterials.push_back(tmpMat);
ls.currentMIndex = meshFrsMaterials.size()-1;
}
}
float triCoords[5][3];
if (numTris_1 > 0) {
clipTriangle(numTris_1, triCoords, v1, v2, v3, clip_1);
for (i = 0; i < numTris_1; i++) {
addTriangle(&ls, triCoords[0], triCoords[i+1], triCoords[i+2]);
_numFacesRead++;
}
}
if (numTris_2 > 0) {
clipTriangle(numTris_2, triCoords, v1, v3, v4, clip_2);
for (i = 0; i < numTris_2; i++) {
addTriangle(&ls, triCoords[0], triCoords[i+1], triCoords[i+2]);
_numFacesRead++;
}
}
}
// We might have several times the same vertex. We want a clean
// shape with no real-vertex. Here, we are making a cleaning
// pass.
real *cleanVertices = NULL;
unsigned cvSize;
unsigned *cleanVIndices = NULL;
GeomCleaner::CleanIndexedVertexArray(
vertices, vSize,
VIndices, viSize,
&cleanVertices, &cvSize,
&cleanVIndices);
real *cleanNormals = NULL;
unsigned cnSize;
unsigned *cleanNIndices = NULL;
GeomCleaner::CleanIndexedVertexArray(
normals, nSize,
NIndices, niSize,
&cleanNormals, &cnSize,
&cleanNIndices);
// format materials array
FrsMaterial** marray = new FrsMaterial*[meshFrsMaterials.size()];
unsigned mindex=0;
for(vector<FrsMaterial>::iterator m=meshFrsMaterials.begin(), mend=meshFrsMaterials.end();
m!=mend;
++m){
marray[mindex] = new FrsMaterial(*m);
++mindex;
}
// deallocates memory:
delete [] vertices;
delete [] normals;
delete [] VIndices;
delete [] NIndices;
// Create the IndexedFaceSet with the retrieved attributes
IndexedFaceSet *rep;
rep = new IndexedFaceSet(cleanVertices, cvSize,
cleanNormals, cnSize,
marray, meshFrsMaterials.size(),
0, 0,
numFaces, numVertexPerFaces, faceStyle,
cleanVIndices, viSize,
cleanNIndices, niSize,
MIndices, viSize,
0,0,
0);
// sets the id of the rep
rep->setId(Id(id, 0));
const BBox<Vec3r> bbox = BBox<Vec3r>(Vec3r(ls.minBBox[0], ls.minBBox[1], ls.minBBox[2]),
Vec3r(ls.maxBBox[0], ls.maxBBox[1], ls.maxBBox[2]));
rep->setBBox(bbox);
shape->AddRep(rep);
Matrix44r meshMat = Matrix44r::identity();
currentMesh->setMatrix(meshMat);
currentMesh->Translate(0,0,0);
currentMesh->AddChild(shape);
_Scene->AddChild(currentMesh);
}