MEM_SmartPtr<BSP_TMesh>
NewTestMesh(
int x,
int y,
MT_Scalar fx,
MT_Scalar fy,
MT_Scalar ampx,
MT_Scalar ampy,
MT_Scalar sx,
MT_Scalar sy
) {
MEM_SmartPtr<BSP_TMesh> output = new BSP_TMesh;
std::vector<BSP_TVertex> &verts = output->VertexSet();
int i,j;
MT_Scalar x_scale = fx*MT_PI/x;
MT_Scalar y_scale = fy*MT_PI/y;
MT_Scalar fsx = sx/x;
MT_Scalar fsy = sy/y;
for (j = 0; j < y; j++) {
for (i = 0; i < x; i++) {
float z = ampx*sin(x_scale * i) + ampy*sin(y_scale * j);
MT_Vector3 val(i*fsx - sx/2,j*fsy - sy/2,z);
BSP_TVertex chuff;
chuff.m_pos = val;
verts.push_back(chuff);
}
}
int poly[4];
for (j = 0; j < (y-1); j++) {
for (i = 0; i < (x-1); i++) {
poly[0] = j*x + i;
poly[1] = poly[0] + 1;
poly[2] = poly[1] + y;
poly[3] = poly[2] -1;
output->AddFace(poly,4);
}
}
output->m_min = MT_Vector3(-sx/2,-sy/2,-ampx -ampy);
output->m_max = MT_Vector3(sx/2,sy/2,ampx + ampy);
return output;
}
MEM_SmartPtr<BSP_TMesh>
BSP_PlyLoader::
NewMeshFromFile(
char * file_name,
MT_Vector3 &min,
MT_Vector3 &max
) {
min = MT_Vector3(MT_INFINITY,MT_INFINITY,MT_INFINITY);
max = MT_Vector3(-MT_INFINITY,-MT_INFINITY,-MT_INFINITY);
PlyProperty vert_props[] = { /* list of property information for a vertex */
{"x", PLY_FLOAT, PLY_FLOAT, offsetof(LoadVertex,x), 0, 0, 0, 0},
{"y", PLY_FLOAT, PLY_FLOAT, offsetof(LoadVertex,y), 0, 0, 0, 0},
{"z", PLY_FLOAT, PLY_FLOAT, offsetof(LoadVertex,z), 0, 0, 0, 0},
};
PlyProperty face_props[] = { /* list of property information for a vertex */
{"vertex_indices", PLY_INT, PLY_INT, offsetof(LoadFace,verts),
1, PLY_UCHAR, PLY_UCHAR, offsetof(LoadFace,nverts)},
};
MEM_SmartPtr<BSP_TMesh> mesh = new BSP_TMesh;
if (mesh == NULL) return NULL;
int i,j;
PlyFile *ply;
int nelems;
char **elist;
int file_type;
float version;
int nprops;
int num_elems;
PlyProperty **plist;
char *elem_name;
LoadVertex load_vertex;
LoadFace load_face;
/* open a PLY file for reading */
ply = ply_open_for_reading(
file_name,
&nelems,
&elist,
&file_type,
&version
);
if (ply == NULL) return NULL;
/* go through each kind of element that we learned is in the file */
/* and read them */
for (i = 0; i < nelems; i++) {
/* get the description of the first element */
elem_name = elist[i];
plist = ply_get_element_description (ply, elem_name, &num_elems, &nprops);
/* print the name of the element, for debugging */
/* if we're on vertex elements, read them in */
if (equal_strings ("vertex", elem_name)) {
/* set up for getting vertex elements */
ply_get_property (ply, elem_name, &vert_props[0]);
ply_get_property (ply, elem_name, &vert_props[1]);
ply_get_property (ply, elem_name, &vert_props[2]);
// make some memory for the vertices
mesh->VertexSet().reserve(num_elems);
/* grab all the vertex elements */
for (j = 0; j < num_elems; j++) {
/* grab and element from the file */
ply_get_element (ply, (void *)&load_vertex);
// pass the vertex into the mesh builder.
if (load_vertex.x < min.x()) {
min.x() = load_vertex.x;
} else
if (load_vertex.x > max.x()) {
max.x()= load_vertex.x;
}
if (load_vertex.y < min.y()) {
min.y() = load_vertex.y;
} else
if (load_vertex.y > max.y()) {
max.y()= load_vertex.y;
}
if (load_vertex.z < min.z()) {
min.z() = load_vertex.z;
} else
if (load_vertex.z > max.z()) {
max.z()= load_vertex.z;
}
BSP_TVertex my_vert;
my_vert.m_pos = MT_Vector3(load_vertex.x,load_vertex.y,load_vertex.z);
mesh->VertexSet().push_back(my_vert);
}
}
/* if we're on face elements, read them in */
if (equal_strings ("face", elem_name)) {
/* set up for getting face elements */
ply_get_property (ply, elem_name, &face_props[0]);
/* grab all the face elements */
for (j = 0; j < num_elems; j++) {
ply_get_element (ply, (void *)&load_face);
int v;
for (v = 2; v< load_face.nverts; v++) {
BSP_TFace f;
f.m_verts[0] = load_face.verts[0];
f.m_verts[1] = load_face.verts[v-1];
f.m_verts[2] = load_face.verts[v];
mesh->BuildNormal(f);
mesh->FaceSet().push_back(f);
}
// free up the memory this pile of shit used to allocate the polygon's vertices
free (load_face.verts);
}
}
}
/* close the PLY file */
ply_close (ply);
return mesh;
}