From e33e19d0587146859d48a134ec9fd94e7b7ba5cd Mon Sep 17 00:00:00 2001 From: "FWoltermann@gmail.com" Date: Thu, 8 Dec 2011 14:53:40 +0000 Subject: Initial upload --- Magic2/ModelFileOBJ.cpp | 783 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 783 insertions(+) create mode 100644 Magic2/ModelFileOBJ.cpp (limited to 'Magic2/ModelFileOBJ.cpp') diff --git a/Magic2/ModelFileOBJ.cpp b/Magic2/ModelFileOBJ.cpp new file mode 100644 index 0000000..8226d22 --- /dev/null +++ b/Magic2/ModelFileOBJ.cpp @@ -0,0 +1,783 @@ +/* Project Magic 2.0 + Destroyer Studios LLC + Copyright © 1997-2004. All Rights Reserved. + + SUBSYSTEM: Magic.exe + FILE: ModelFileOBJ.cpp + AUTHOR: John DiCamillo + + + OVERVIEW + ======== + File loader for Wavefront/OBJ format models +*/ + +#include "stdafx.h" +#include "Magic.h" +#include "MagicDoc.h" +#include "ModelFileOBJ.h" + +#include "Bitmap.h" +#include "Polygon.h" +#include "List.h" +#include "Text.h" + +// +--------------------------------------------------------------------+ + +ModelFileOBJ::ModelFileOBJ(const char* fname) + : ModelFile(fname) +{ +} + +ModelFileOBJ::~ModelFileOBJ() +{ +} + +// +--------------------------------------------------------------------+ + +const int MAX_OBJ_FACE_VERTS = 32; + +struct ObjFace { + int v[MAX_OBJ_FACE_VERTS]; + int n[MAX_OBJ_FACE_VERTS]; + int t[MAX_OBJ_FACE_VERTS]; + + int nverts; + + ObjFace() { + nverts = 0; + + for (int i = 0; i < MAX_OBJ_FACE_VERTS; i++) + v[i] = n[i] = t[i] = 0; + } + + ObjFace(const ObjFace& f) { + nverts = f.nverts; + + for (int i = 0; i < MAX_OBJ_FACE_VERTS; i++) { + v[i] = f.v[i]; + n[i] = f.n[i]; + t[i] = f.t[i]; + } + } + + void ReverseOrder() { + int i, tmp[MAX_OBJ_FACE_VERTS]; + + for (i = 0; i < nverts; i++) tmp[i] = v[i]; + for (i = 0; i < nverts; i++) v[i] = tmp[nverts-1-i]; + + for (i = 0; i < nverts; i++) tmp[i] = n[i]; + for (i = 0; i < nverts; i++) n[i] = tmp[nverts-1-i]; + + for (i = 0; i < nverts; i++) tmp[i] = t[i]; + for (i = 0; i < nverts; i++) t[i] = tmp[nverts-1-i]; + } +}; + +static void ParsePoly(const char* line, ObjFace* face) +{ + int v[MAX_OBJ_FACE_VERTS]; + int n[MAX_OBJ_FACE_VERTS]; + int t[MAX_OBJ_FACE_VERTS]; + + for (int i = 0; i < MAX_OBJ_FACE_VERTS; i++) { + v[i] = n[i] = t[i] = 0; + } + + const char* p = line + 1; + + while (isspace(*p)) + p++; + + i = 0; + while (*p && i < MAX_OBJ_FACE_VERTS) { + int factor = 1; + + if (*p == '-') { + factor = -1; + p++; + } + + while (isdigit(*p)) { + v[i] = v[i]*10 + *p - '0'; + p++; + } + v[i] *= factor; + + if (*p == '/') { p++; // slash one + + factor = 1; + + if (*p == '-') { + factor = -1; + p++; + } + + while (isdigit(*p)) { + t[i] = t[i]*10 + *p - '0'; + p++; + } + t[i] *= factor; + + if (*p == '/') { p++; // slash two + + factor = 1; + + if (*p == '-') { + factor = -1; + p++; + } + + while (isdigit(*p)) { + n[i] = n[i]*10 + *p - '0'; + p++; + } + n[i] *= factor; + }} + + while (isspace(*p)) p++; + i++; + } + + face->nverts = i; + + for (i = 0; i < MAX_OBJ_FACE_VERTS; i++) { + face->v[i] = v[i]; + face->n[i] = n[i]; + face->t[i] = t[i]; + } +} + +static int LoadMatls(const char* lpszPathName, Model* m) +{ + int nmatls = 0; + + FILE* fp = fopen(lpszPathName, "r"); + if (!fp) { + ::MessageBox(0, "Open Failed: could not open file", "ERROR", MB_OK); + return 0; + } + + Material* mtl = 0; + + while (!feof(fp)) { + char raw_line[512]; + char line[512]; + fgets(raw_line, 512, fp); + + strcpy(line, Text(raw_line).trim().data()); + + if (strstr(line, "newmtl")) { + mtl = new Material; + strncpy(mtl->name, line+7, Material::NAMELEN - 1); + + m->GetMaterials().append(mtl); + } + + else if (line[0] == 'K' && line[1] == 'a') { + float r,g,b; + sscanf(line, "Ka %f %f %f", &r, &g, &b); + mtl->Ka = ColorValue(r,g,b); + + mtl->ambient_value = 1.0f; + mtl->ambient_color = mtl->Ka.ToColor(); + } + + else if (line[0] == 'K' && line[1] == 'd') { + float r,g,b; + sscanf(line, "Kd %f %f %f", &r, &g, &b); + mtl->Kd = ColorValue(r,g,b); + + mtl->diffuse_value = 1.0f; + mtl->diffuse_color = mtl->Kd.ToColor(); + } + + else if (line[0] == 'K' && line[1] == 's') { + float r,g,b; + sscanf(line, "Ks %f %f %f", &r, &g, &b); + mtl->Ks = ColorValue(r,g,b); + + mtl->specular_value = 1.0f; + mtl->specular_color = mtl->Ks.ToColor(); + } + + else if (line[0] == 'N' && line[1] == 's') { + float ns; + sscanf(line, "Ns %f", &ns); + mtl->power = ns; + } + + else if (strstr(line, "map_Kd")) { + const char* src = strstr(line, "map_Kd") + 7; + while (!isalnum(*src)) src++; + + LoadTexture(src, mtl->tex_diffuse, Bitmap::BMP_SOLID); + } + } + + fclose(fp); + return nmatls; +} + +static Material* FindMatl(const char* mtl_name, Model* model) +{ + ListIter iter = model->GetMaterials(); + while (++iter) { + Material* m = iter.value(); + if (!strcmp(m->name, mtl_name)) + return m; + } + + return 0; +} + +// +--------------------------------------------------------------------+ + +static int mcomp(const void* a, const void* b) +{ + Poly* pa = (Poly*) a; + Poly* pb = (Poly*) b; + + if (pa->sortval == pb->sortval) + return 0; + + if (pa->sortval < pb->sortval) + return 1; + + return -1; +} + +bool +ModelFileOBJ::Load(Model* m, double scale) +{ + if (m && scale > 0 && strlen(filename) > 0) { + ModelFile::Load(m, scale); + + FILE* fp = fopen(filename, "rb"); + + // ok, now start reading the data: + int ntex = 0; + int nverts = 0; + int npv = 0; + int npolys = 0; + int vi = 0; + int vn = 0; + int vt = 0; + + char root_path[256]; + ZeroMemory(root_path, 256); + + if (strrchr(filename, '\\')) { + strcpy(root_path, filename); + char* p = strrchr(root_path, '\\'); + if (p) + *(p+1) = 0; + } + + else if (strrchr(filename, '/')) { + strcpy(root_path, filename); + char* p = strrchr(root_path, '/'); + if (p) + *(p+1) = 0; + } + + // count verts and polys: + while (!feof(fp)) { + char line[256]; + fgets(line, 255, fp); + + if (line[0] == 'v') { + switch (line[1]) { + case ' ': vi++; break; + case 'n': vn++; break; + case 't': vt++; break; + } + } + + else if (line[0] == 'f' && line[1] == ' ') { + npolys++; + + ObjFace f; + ParsePoly(line, &f); + f.ReverseOrder(); + + npv += f.nverts; + } + + else if (strstr(line, "mtllib")) { + const char* libname = strstr(line, "mtllib"); + libname += 7; + while (isspace(*libname)) + libname++; + + char libpath[256]; + strcpy(libpath, root_path); + strcat(libpath, libname); + int n = strlen(libpath); + char* p = &libpath[n-1]; + while (isspace(*p)) *p-- = 0; + + int nmatls = LoadMatls(libpath, model); + } + } + + nverts = npv; + if (vi > nverts) nverts = vi; + if (vn > nverts) nverts = vn; + if (vt > nverts) nverts = vt; + + if (nverts > Model::MAX_VERTS || npolys > Model::MAX_POLYS) { + ::MessageBox(0, "Wavefront/OBJ Import Failed: that model is just too darn complicated!", "ERROR", MB_OK); + return false; + } + + vi = 0; + vn = 0; + vt = 0; + + fseek(fp, 0, SEEK_SET); + + Surface* surface = new Surface; + m->GetSurfaces().append(surface); + + surface->CreateVerts(nverts); + surface->CreatePolys(npolys); + + VertexSet* vset = surface->GetVertexSet(); + Poly* polys = surface->GetPolys(); + + // read vertex set: + Vec3* vloc = new Vec3[nverts]; + Vec3* vnrm = new Vec3[nverts]; + float* vtu = new float[nverts]; + float* vtv = new float[nverts]; + + float radius = 0; + + while (!feof(fp)) { + char line[256]; + fgets(line, 255, fp); + + if (line[0] == 'v') { + if (line[1] == ' ') { + const char* p = line + 2; + + while (isspace(*p)) p++; + sscanf(p, "%f", &vloc[vi].x); + + while (!isspace(*p)) p++; + while (isspace(*p)) p++; + sscanf(p, "%f", &vloc[vi].y); + + while (!isspace(*p)) p++; + while (isspace(*p)) p++; + sscanf(p, "%f", &vloc[vi].z); + + float d = vloc[vi].length(); + if (d > radius) + radius = d; + + vi++; + } + + else if (line[1] == 'n') { + const char* p = line + 2; + + while (isspace(*p)) p++; + sscanf(p, "%f", &vnrm[vn].x); + + while (!isspace(*p)) p++; + while (isspace(*p)) p++; + sscanf(p, "%f", &vnrm[vn].y); + + while (!isspace(*p)) p++; + while (isspace(*p)) p++; + sscanf(p, "%f", &vnrm[vn].z); + + vn++; + } + + else if (line[1] == 't') { + const char* p = line + 2; + + while (isspace(*p)) p++; + sscanf(p, "%f", &vtu[vt]); + + while (!isspace(*p)) p++; + while (isspace(*p)) p++; + sscanf(p, "%f", &vtv[vt]); + + vtv[vt] = 1.0f - vtv[vt]; + + vt++; + } + } + } + + fseek(fp, 0, SEEK_SET); + + // read polys: + int poly = 0; + char line[256]; + ObjFace face; + Material* material = 0; + int mtl_index = 0; + + if (m->NumMaterials()) + material = m->GetMaterials().first(); + + int current_v = 1; + int current_vn = 1; + int current_vt = 1; + int v = 0; // vset index pointer + + while (!feof(fp)) { + char raw_line[256]; + fgets(raw_line, 256, fp); + + strcpy(line, Text(raw_line).trim().data()); + + if (strstr(line, "usemtl")) { + material = FindMatl(line + 7, model); + ListIter iter = model->GetMaterials(); + while (++iter) + if (material == iter.value()) + mtl_index = iter.index(); + } + + else if (line[0] == 'v') { + if (line[1] == ' ') current_v++; + else if (line[1] == 'n') current_vn++; + else if (line[1] == 't') current_vt++; + } + + else if (line[0] == 'f') { + ParsePoly(line, &face); + face.ReverseOrder(); + + for (int n = 0; n < face.nverts; n++) { + if (face.v[n] < 0) + face.v[n] += current_v; + + if (face.n[n] < 0) + face.n[n] += current_vn; + + if (face.t[n] < 0) + face.t[n] += current_vt; + } + + if (face.nverts > 4) { + npolys += face.nverts - 3; + + for (int tri = 2; tri < face.nverts; tri++) { + Poly* p = polys + poly; + poly++; + + p->nverts = 3; + + vset->loc[v+0] = vloc[face.v[ tri ] -1]; + vset->loc[v+1] = vloc[face.v[ tri-1 ] -1]; + vset->loc[v+2] = vloc[face.v[ 0] -1]; + + if (face.n[0] > 0) { + vset->nrm[v+0] = vnrm[face.n[ tri ] -1]; + vset->nrm[v+1] = vnrm[face.n[ tri-1 ] -1]; + vset->nrm[v+2] = vnrm[face.n[ 0] -1]; + } + else { + vset->nrm[v+0] = vloc[v+0]; vset->nrm[v+0].Normalize(); + vset->nrm[v+1] = vloc[v+1]; vset->nrm[v+1].Normalize(); + vset->nrm[v+2] = vloc[v+2]; vset->nrm[v+2].Normalize(); + } + + if (face.t[0] > 0) { + vset->tu[v+0] = vtu[face.t[ tri ] -1]; + vset->tv[v+0] = vtv[face.t[ tri ] -1]; + vset->tu[v+1] = vtu[face.t[ tri-1 ] -1]; + vset->tv[v+1] = vtv[face.t[ tri-1 ] -1]; + vset->tu[v+2] = vtu[face.t[ 0 ] -1]; + vset->tv[v+2] = vtv[face.t[ 0 ] -1]; + } + + p->verts[0] = v+0; + p->verts[1] = v+1; + p->verts[2] = v+2; + + p->material = material; + p->sortval = mtl_index; + p->vertex_set = vset; + + p->plane = Plane(vset->loc[p->verts[0]], + vset->loc[p->verts[2]], + vset->loc[p->verts[1]]); + + v += p->nverts; + } + } + + else if (face.nverts == 3 || face.nverts == 4) { + Poly* p = polys + poly; + poly++; + + p->nverts = face.nverts; + + bool flat = true; + int first = v; + + for (int i = 0; i < p->nverts; i++) { + int face_index = i; + + vset->loc[v] = vloc[face.v[face_index]-1]; + + if (face.n[face_index] > 0) + vset->nrm[v] = vnrm[face.n[face_index]-1]; + else + vset->nrm[v] = vset->loc[v]; + + vset->nrm[v].Normalize(); + + if (vset->nrm[v] != vset->nrm[first]) + flat = false; + + if (face.t[face_index] > 0) { + vset->tu[v] = vtu [face.t[face_index]-1]; + vset->tv[v] = vtv [face.t[face_index]-1]; + } + + p->verts[i] = v++; + } + + p->material = material; + p->sortval = mtl_index; + p->flatness = flat ? 1.0f : 0.0f; + + if (p->nverts == 3) + surface->AddIndices(3); + + else if (p->nverts == 4) + surface->AddIndices(6); + + p->vertex_set = vset; + p->plane = Plane(vset->loc[p->verts[0]], + vset->loc[p->verts[2]], + vset->loc[p->verts[1]]); + } + + if (poly >= npolys) + break; + } + } + + // sort the polys by material index: + qsort((void*) polys, npolys, sizeof(Poly), mcomp); + + // then assign them to cohesive segments: + Segment* segment = 0; + + for (int n = 0; n < npolys; n++) { + if (segment && segment->material == polys[n].material) { + segment->npolys++; + } + else { + segment = 0; + } + + if (!segment) { + segment = new Segment; + + segment->npolys = 1; + segment->polys = &polys[n]; + segment->material = segment->polys->material; + + surface->GetSegments().append(segment); + } + } + + delete [] vloc; + delete [] vnrm; + delete [] vtu; + delete [] vtv; + + *pnverts = nverts; + *pnpolys = npolys; + *pradius = radius; + + fclose(fp); + + m->Normalize(); + return true; + } + + return false; +} + +// +--------------------------------------------------------------------+ + +static bool +SaveWaveFrontMatLib(const char* path, const char* root, Model* model) +{ + char filename[256]; + sprintf(filename, "%s%s.mtl", path, root); + + FILE* f = fopen(filename, "w"); + if (f) { + fprintf(f, "#\n# %s Material Library exported by Magic 2.0\n#\n\n", root); + + ListIter iter = model->GetMaterials(); + while (++iter) { + Material* mtl = iter.value(); + + fprintf(f, "newmtl %s\n", mtl->name); + fprintf(f, "Ka %.5f %.5f %.5f\n", mtl->Ka.Red(), mtl->Ka.Green(), mtl->Ka.Blue()); + fprintf(f, "Kd %.5f %.5f %.5f\n", mtl->Kd.Red(), mtl->Kd.Green(), mtl->Kd.Blue()); + fprintf(f, "Ks %.5f %.5f %.5f\n", mtl->Ks.Red(), mtl->Ks.Green(), mtl->Ks.Blue()); + fprintf(f, "Ns %.5f\n", mtl->power); + fprintf(f, "illum 2\n"); + if (mtl->tex_diffuse) + fprintf(f, "map_Kd %s\n", mtl->tex_diffuse->GetFilename()); + fprintf(f, "\n"); + } + + fclose(f); + return true; + } + + return false; +} + +bool +ModelFileOBJ::Save(Model* m) +{ + if (m) { + ModelFile::Save(m); + char pathname[256]; + char rootname[256]; + + ZeroMemory(pathname, sizeof(pathname)); + ZeroMemory(rootname, sizeof(rootname)); + + const char* ext = strstr(filename, ".obj"); + if (!ext) + ext = strstr(filename, ".OBJ"); + + const char* sep = strrchr(filename, '/'); + if (!sep) + sep = strrchr(filename, '\\'); + + const char* src = filename; + char* dst = pathname; + + if (sep) { + while (src != sep) + *dst++ = *src++; + *dst++ = *src++; + } + + if (ext) { + dst = rootname; + while (src != ext) + *dst++ = *src++; + } + else { + strcpy(rootname, src); + } + + strcpy(filename, pathname); + strcat(filename, rootname); + strcat(filename, ".obj"); + + FILE* f = fopen(filename, "w"); + if (!f) { + ::MessageBox(0, "Export Failed: Magic could not open the file for writing", "ERROR", MB_OK); + return false; + } + + fprintf(f, "# Wavefront OBJ exported by Magic 2.0\n\n"); + fprintf(f, "mtllib %s.mtl\n", rootname); + + ListIter s_iter = m->GetSurfaces(); + + // vertex locations + fprintf(f, "\n# VERTEX LOCATIONS: %d\n", m->NumVerts()); + while (++s_iter) { + Surface* s = s_iter.value(); + VertexSet* vset = s->GetVertexSet(); + + for (int n = 0; n < vset->nverts; n++) { + fprintf(f, "v %12.5f %12.5f %12.5f\n", + vset->loc[n].x, + vset->loc[n].y, + vset->loc[n].z); + } + } + + s_iter.reset(); + + // vertex normals + fprintf(f, "\n# VERTEX NORMALS: %d\n", m->NumVerts()); + while (++s_iter) { + Surface* s = s_iter.value(); + VertexSet* vset = s->GetVertexSet(); + + for (int n = 0; n < vset->nverts; n++) { + fprintf(f, "vn %8.3f %8.3f %8.3f\n", + vset->nrm[n].x, + vset->nrm[n].y, + vset->nrm[n].z); + } + } + + s_iter.reset(); + + // texture coordinates + fprintf(f, "\n# TEXTURE COORDINATES: %d\n", m->NumVerts()); + while (++s_iter) { + Surface* s = s_iter.value(); + VertexSet* vset = s->GetVertexSet(); + + for (int n = 0; n < vset->nverts; n++) { + fprintf(f, "vt %8.3f %8.3f\n", + vset->tu[n], 1 - vset->tv[n]); + } + } + + s_iter.reset(); + + // faces + Material* current_material = 0; + + fprintf(f, "\n# FACES: %d\n", m->NumPolys()); + while (++s_iter) { + Surface* s = s_iter.value(); + + for (int n = 0; n < s->NumPolys(); n++) { + const Poly* p = s->GetPolys() + n; + int nv = p->nverts; + Material* mtl = p->material; + + if (current_material != mtl) { + fprintf(f, "\n\nusemtl %s\n", mtl->name); + current_material = mtl; + } + + fprintf(f, "\nf "); + for (int v = nv-1; v >= 0; v--) { + fprintf(f, "%d/%d/%d ", + p->verts[v] + 1, + p->verts[v] + 1, + p->verts[v] + 1); + } + } + } + + fprintf(f, "\n\n\n# END OF FILE.\n"); + fclose(f); + + return SaveWaveFrontMatLib(pathname, rootname, m); + } + + return false; +} + +// +--------------------------------------------------------------------+ -- cgit v1.1