static R3Vector calculate_sink_force(R3Scene* scene, R3Particle* particle)
{
R3ParticleSink* sink;
R3Vector force = R3Vector(0,0,0);
for (int i = 0; i < scene->NParticleSinks(); i++)
{
sink = scene->ParticleSink(i);
if (sink->shape->type == R3_SPHERE_SHAPE)
{
R3Sphere* sphere = sink->shape->sphere;
R3Point center = sphere->Center();
R3Vector f = -(particle->position - center);
double d = f.Length() - sphere->Radius();
f.Normalize();
double mag = sink->intensity / (sink->constant_attenuation +
sink->linear_attenuation*d +
sink->quadratic_attenuation*d*d);
force += f*mag;
}
else if (sink->shape->type == R3_MESH_SHAPE)
{
R3Mesh* mesh = sink->shape->mesh;
R3Point center = mesh->Center();
R3Vector f = -(particle->position - center);
double d = f.Length();
f.Normalize();
double mag = sink->intensity / (sink->constant_attenuation +
sink->linear_attenuation*d +
sink->quadratic_attenuation*d*d);
force += f*mag;
}
else if (sink->shape->type == R3_BOX_SHAPE)
{
R3Box* box = sink->shape->box;
R3Point center = R3Point((box->XMax() - box->XMin())/2 + box->XMin(),
(box->YMax() - box->YMin())/2 + box->YMin(),
(box->ZMax() - box->ZMin())/2 + box->ZMin());
R3Vector f = -(particle->position - center);
double d = f.Length();
f.Normalize();
double mag = sink->intensity / (sink->constant_attenuation +
sink->linear_attenuation*d +
sink->quadratic_attenuation*d*d);
force += f*mag;
}
}
return force;
}
int
main(int argc, char **argv)
{
// Look for help
for (int i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-help")) {
ShowUsage();
}
}
// Read input and output mesh filenames
if (argc < 3) ShowUsage();
argv++, argc--; // First argument is program name
char *tree_file_name=*argv;argv++;argc--;
int iterations=0;
if (argc>1)
iterations=atoi(*argv++),argc--;
char *output_mesh_name = *argv; argv++, argc--;
// Allocate mesh
R3Mesh *mesh = new R3Mesh();
if (!mesh) {
fprintf(stderr, "Unable to allocate mesh\n");
exit(-1);
}
// Read input mesh
// if (!mesh->Read(input_mesh_name)) {
// fprintf(stderr, "Unable to read mesh from %s\n", input_mesh_name);
// exit(-1);
// }
mesh->Tree(tree_file_name,iterations);
// Write output mesh
if (!mesh->Write(output_mesh_name)) {
fprintf(stderr, "Unable to write mesh to %s\n", output_mesh_name);
exit(-1);
}
// Delete mesh
delete mesh;
printf("All done.\n");
// Return success
return EXIT_SUCCESS;
}
R3Mesh::
R3Mesh(const R3Mesh& mesh)
: bbox(R3null_box)
{
// Create vertices
for (int i = 0; i < mesh.NVertices(); i++) {
R3MeshVertex *v = mesh.Vertex(i);
CreateVertex(v->position, v->normal, v->texcoords);
}
// Create faces
for (int i = 0; i < mesh.NFaces(); i++) {
R3MeshFace *f = mesh.Face(i);
vector<R3MeshVertex *> face_vertices;
for (unsigned int j = 0; j < f->vertices.size(); j++) {
R3MeshVertex *ov = f->vertices[j];
R3MeshVertex *nv = Vertex(ov->id);
face_vertices.push_back(nv);
}
CreateFace(face_vertices);
}
}
int R3Scene::
Read(const char *filename, R3Node *node)
{
// Open file
FILE *fp;
if (!(fp = fopen(filename, "r"))) {
fprintf(stderr, "Unable to open file %s", filename);
return 0;
}
// Create array of materials
vector<R3Material *> materials;
// Create default material
R3Material *default_material = new R3Material();
default_material->ka = R3Rgb(0.2, 0.2, 0.2, 1);
default_material->kd = R3Rgb(0.5, 0.5, 0.5, 1);
default_material->ks = R3Rgb(0.5, 0.5, 0.5, 1);
default_material->kt = R3Rgb(0.0, 0.0, 0.0, 1);
default_material->emission = R3Rgb(0, 0, 0, 1);
default_material->shininess = 10;
default_material->indexofrefraction = 1;
default_material->texture = NULL;
default_material->id = 0;
// Create stack of group information
const int max_depth = 1024;
R3Node *group_nodes[max_depth] = { NULL };
R3Material *group_materials[max_depth] = { NULL };
group_nodes[0] = (node) ? node : root;
group_materials[0] = default_material;
int depth = 0;
// Read body
char cmd[128];
int command_number = 1;
while (fscanf(fp, "%s", cmd) == 1) {
if (cmd[0] == '#') {
// Comment -- read everything until end of line
do { cmd[0] = fgetc(fp); } while ((cmd[0] >= 0) && (cmd[0] != '\n'));
}
else if (!strcmp(cmd, "tri")) {
// Read data
int m;
R3Point p1, p2, p3;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf%lf%lf%lf%lf", &m,
&p1[0], &p1[1], &p1[2], &p2[0], &p2[1], &p2[2], &p3[0], &p3[1], &p3[2]) != 10) {
fprintf(stderr, "Unable to read triangle at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at tri command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create mesh
R3Mesh *mesh = new R3Mesh();
vector<R3MeshVertex *> vertices;
vertices.push_back(mesh->CreateVertex(p1, R3zero_vector, R2zero_point));
vertices.push_back(mesh->CreateVertex(p2, R3zero_vector, R2zero_point));
vertices.push_back(mesh->CreateVertex(p3, R3zero_vector, R2zero_point));
mesh->CreateFace(vertices);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_MESH_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = mesh;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = R3null_box;
node->bbox.Union(p1);
node->bbox.Union(p2);
node->bbox.Union(p3);
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "box")) {
// Read data
int m;
R3Point p1, p2;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf%lf", &m, &p1[0], &p1[1], &p1[2], &p2[0], &p2[1], &p2[2]) != 7) {
fprintf(stderr, "Unable to read box at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at box command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create box
R3Box *box = new R3Box(p1, p2);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_BOX_SHAPE;
shape->box = box;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = NULL;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = *box;
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "sphere")) {
// Read data
int m;
R3Point c;
double r;
if (fscanf(fp, "%d%lf%lf%lf%lf", &m, &c[0], &c[1], &c[2], &r) != 5) {
fprintf(stderr, "Unable to read sphere at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at sphere command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create sphere
R3Sphere *sphere = new R3Sphere(c, r);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_SPHERE_SHAPE;
shape->box = NULL;
shape->sphere = sphere;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = NULL;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = sphere->BBox();
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "cylinder")) {
// Read data
int m;
R3Point c;
double r, h;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf", &m, &c[0], &c[1], &c[2], &r, &h) != 6) {
fprintf(stderr, "Unable to read cylinder at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cyl command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create cylinder
R3Cylinder *cylinder = new R3Cylinder(c, r, h);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_CYLINDER_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = cylinder;
shape->cone = NULL;
shape->mesh = NULL;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = cylinder->BBox();
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "mesh")) {
// Read data
int m;
char meshname[256];
if (fscanf(fp, "%d%s", &m, meshname) != 2) {
fprintf(stderr, "Unable to parse mesh command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cone command %d in file %s\n", command_number, filename);
return 0;
}
}
// Get mesh filename
char buffer[2048];
strcpy(buffer, filename);
char *bufferp = strrchr(buffer, '/');
if (bufferp) *(bufferp+1) = '\0';
else buffer[0] = '\0';
strcat(buffer, meshname);
// Create mesh
R3Mesh *mesh = new R3Mesh();
if (!mesh) {
fprintf(stderr, "Unable to allocate mesh\n");
return 0;
}
// Read mesh file
if (!mesh->Read(buffer)) {
fprintf(stderr, "Unable to read mesh: %s\n", buffer);
return 0;
}
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_MESH_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = mesh;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = mesh->bbox;
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
//in order to set the arwing node as a global in GlutTest.cpp
else if (!strcmp(cmd, "arwing")) {
// Read data
int m;
char meshname[256];
if (fscanf(fp, "%d%s", &m, meshname) != 2) {
fprintf(stderr, "Unable to parse mesh command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cone command %d in file %s\n", command_number, filename);
return 0;
}
}
// Get mesh filename
char buffer[2048];
strcpy(buffer, filename);
char *bufferp = strrchr(buffer, '/');
if (bufferp) *(bufferp+1) = '\0';
else buffer[0] = '\0';
strcat(buffer, meshname);
// Create mesh
R3Mesh *mesh = new R3Mesh();
if (!mesh) {
fprintf(stderr, "Unable to allocate mesh\n");
return 0;
}
// Read mesh file
if (!mesh->Read(buffer)) {
fprintf(stderr, "Unable to read mesh: %s\n", buffer);
return 0;
}
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_MESH_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = mesh;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = mesh->bbox;
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
arwingNode = node;
}
/* unneeded
//turret - basically a box that shoots
else if (!strcmp(cmd, "turret")) {
// Read data
int m;
R3Point p1, p2;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf%lf", &m, &p1[0], &p1[1], &p1[2], &p2[0], &p2[1], &p2[2]) != 7) {
fprintf(stderr, "Unable to read box at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at box command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create box
R3Box *box = new R3Box(p1, p2);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_BOX_SHAPE;
shape->box = box;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = NULL;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->cumulativeTransformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = *box;
node->enemy = new SFEnemy();
//list properties of the turret
node->enemy->position = box->Centroid();
node->enemy->projectileSource = box->Centroid();
node->enemy->node = node;
// node->enemy->projectileSource.InverseTransform(node->transformation);
// node->enemy->projectileSource.SetZ(node->enemy->projectileSource.Z() - .5 * (box->ZMax() - box->ZMin()));
enemies.push_back(node->enemy);
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
} */
//enemy - a mesh that moves and shoots
else if (!strcmp(cmd, "enemy")) {
// Read data
int fixed;
int m;
float vx, vy, vz;
int h;
char meshname[256];
float particle_velocity;
int firing_rate;
if (fscanf(fp, "%d%d%s%f%f%f%d%f%d", &fixed, &m, meshname, &vx, &vy, &vz, &h,&particle_velocity, &firing_rate) != 9) {
fprintf(stderr, "Unable to parse enemy command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cone command %d in file %s\n", command_number, filename);
return 0;
}
}
// Get mesh filename
char buffer[2048];
strcpy(buffer, filename);
char *bufferp = strrchr(buffer, '/');
if (bufferp) *(bufferp+1) = '\0';
else buffer[0] = '\0';
strcat(buffer, meshname);
R3Vector *initialVelocity = new R3Vector(vx, vy, vz);
// Create mesh
R3Mesh *mesh = new R3Mesh();
if (!mesh) {
fprintf(stderr, "Unable to allocate mesh\n");
return 0;
}
// Read mesh file
if (!mesh->Read(buffer)) {
fprintf(stderr, "Unable to read mesh: %s\n", buffer);
return 0;
}
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_MESH_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = mesh;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->cumulativeTransformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = mesh->bbox;
node->enemy = new SFEnemy(fixed, mesh, *initialVelocity, h, particle_velocity, firing_rate);
node->enemy->position = shape->mesh->Center();
node->enemy->projectileSource = shape->mesh->Center();
node->enemy->node = node;
enemies.push_back(node->enemy);
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "cone")) {
// Read data
int m;
R3Point c;
double r, h;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf", &m, &c[0], &c[1], &c[2], &r, &h) != 6) {
fprintf(stderr, "Unable to read cone at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cone command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create cone
R3Cone *cone = new R3Cone(c, r, h);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_CONE_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = cone;
shape->mesh = NULL;
shape->segment = NULL;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = cone->BBox();
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "line")) {
// Read data
int m;
R3Point p1, p2;
if (fscanf(fp, "%d%lf%lf%lf%lf%lf%lf", &m, &p1[0], &p1[1], &p1[2], &p2[0], &p2[1], &p2[2]) != 7) {
fprintf(stderr, "Unable to read line at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at line command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create segment
R3Segment *segment = new R3Segment(p1, p2);
// Create shape
R3Shape *shape = new R3Shape();
shape->type = R3_SEGMENT_SHAPE;
shape->box = NULL;
shape->sphere = NULL;
shape->cylinder = NULL;
shape->cone = NULL;
shape->mesh = NULL;
shape->segment = segment;
// Create shape node
R3Node *node = new R3Node();
node->transformation = R3identity_matrix;
node->material = material;
node->shape = shape;
node->bbox = segment->BBox();
node->enemy = NULL;
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "begin")) {
// Read data
int m;
double matrix[16];
if (fscanf(fp, "%d%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf", &m,
&matrix[0], &matrix[1], &matrix[2], &matrix[3],
&matrix[4], &matrix[5], &matrix[6], &matrix[7],
&matrix[8], &matrix[9], &matrix[10], &matrix[11],
&matrix[12], &matrix[13], &matrix[14], &matrix[15]) != 17) {
fprintf(stderr, "Unable to read begin at command %d in file %s\n", command_number, filename);
return 0;
}
// Get material
R3Material *material = group_materials[depth];
if (m >= 0) {
if (m < (int) materials.size()) {
material = materials[m];
}
else {
fprintf(stderr, "Invalid material id at cone command %d in file %s\n", command_number, filename);
return 0;
}
}
// Create new group node
R3Node *node = new R3Node();
node->transformation = R3Matrix(matrix);
node->material = NULL;
node->shape = NULL;
node->bbox = R3null_box;
node->enemy = NULL;
// Push node onto stack
depth++;
group_nodes[depth] = node;
group_materials[depth] = material;
}
else if (!strcmp(cmd, "end")) {
// Pop node from stack
R3Node *node = group_nodes[depth];
depth--;
// Transform bounding box
node->bbox.Transform(node->transformation);
// Insert node
group_nodes[depth]->bbox.Union(node->bbox);
group_nodes[depth]->children.push_back(node);
node->parent = group_nodes[depth];
}
else if (!strcmp(cmd, "material")) {
// Read data
R3Rgb ka, kd, ks, kt, e;
double n, ir;
char texture_name[256];
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%s",
&ka[0], &ka[1], &ka[2], &kd[0], &kd[1], &kd[2], &ks[0], &ks[1], &ks[2], &kt[0], &kt[1], &kt[2],
&e[0], &e[1], &e[2], &n, &ir, texture_name) != 18) {
fprintf(stderr, "Unable to read material at command %d in file %s\n", command_number, filename);
return 0;
}
// Create material
R3Material *material = new R3Material();
material->ka = ka;
material->kd = kd;
material->ks = ks;
material->kt = kt;
material->emission = e;
material->shininess = n;
material->indexofrefraction = ir;
material->texture = NULL;
// Read texture
if (strcmp(texture_name, "0")) {
// Get texture filename
char buffer[2048];
strcpy(buffer, filename);
char *bufferp = strrchr(buffer, '/');
if (bufferp) *(bufferp+1) = '\0';
else buffer[0] = '\0';
strcat(buffer, texture_name);
// Read texture image
material->texture = new R2Image();
if (!material->texture->Read(buffer)) {
fprintf(stderr, "Unable to read texture from %s at command %d in file %s\n", buffer, command_number, filename);
return 0;
}
}
// Insert material
materials.push_back(material);
}
else if (!strcmp(cmd, "dir_light")) {
// Read data
R3Rgb c;
R3Vector d;
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf",
&c[0], &c[1], &c[2], &d[0], &d[1], &d[2]) != 6) {
fprintf(stderr, "Unable to read directional light at command %d in file %s\n", command_number, filename);
return 0;
}
// Normalize direction
d.Normalize();
// Create light
R3Light *light = new R3Light();
light->type = R3_DIRECTIONAL_LIGHT;
light->color = c;
light->position = R3Point(0, 0, 0);
light->direction = d;
light->radius = 0;
light->constant_attenuation = 0;
light->linear_attenuation = 0;
light->quadratic_attenuation = 0;
light->angle_attenuation = 0;
light->angle_cutoff = M_PI;
// Insert light
lights.push_back(light);
}
else if (!strcmp(cmd, "point_light")) {
// Read data
R3Rgb c;
R3Point p;
double ca, la, qa;
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf%lf%lf%lf", &c[0], &c[1], &c[2], &p[0], &p[1], &p[2], &ca, &la, &qa) != 9) {
fprintf(stderr, "Unable to read point light at command %d in file %s\n", command_number, filename);
return 0;
}
// Create light
R3Light *light = new R3Light();
light->type = R3_POINT_LIGHT;
light->color = c;
light->position = p;
light->direction = R3Vector(0, 0, 0);
light->radius = 0;
light->constant_attenuation = ca;
light->linear_attenuation = la;
light->quadratic_attenuation = qa;
light->angle_attenuation = 0;
light->angle_cutoff = M_PI;
// Insert light
lights.push_back(light);
}
else if (!strcmp(cmd, "spot_light")) {
// Read data
R3Rgb c;
R3Point p;
R3Vector d;
double ca, la, qa, sc, sd;
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf",
&c[0], &c[1], &c[2], &p[0], &p[1], &p[2], &d[0], &d[1], &d[2], &ca, &la, &qa, &sc, &sd) != 14) {
fprintf(stderr, "Unable to read point light at command %d in file %s\n", command_number, filename);
return 0;
}
// Normalize direction
d.Normalize();
// Create light
R3Light *light = new R3Light();
light->type = R3_SPOT_LIGHT;
light->color = c;
light->position = p;
light->direction = d;
light->radius = 0;
light->constant_attenuation = ca;
light->linear_attenuation = la;
light->quadratic_attenuation = qa;
light->angle_attenuation = sd;
light->angle_cutoff = sc;
// Insert light
lights.push_back(light);
}
else if (!strcmp(cmd, "area_light")) {
// Read data
R3Rgb c;
R3Point p;
R3Vector d;
double radius, ca, la, qa;
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf",
&c[0], &c[1], &c[2], &p[0], &p[1], &p[2], &d[0], &d[1], &d[2], &radius, &ca, &la, &qa) != 13) {
fprintf(stderr, "Unable to read area light at command %d in file %s\n", command_number, filename);
return 0;
}
// Normalize direction
d.Normalize();
// Create light
R3Light *light = new R3Light();
light->type = R3_AREA_LIGHT;
light->color = c;
light->position = p;
light->direction = d;
light->radius = radius;
light->constant_attenuation = ca;
light->linear_attenuation = la;
light->quadratic_attenuation = qa;
light->angle_attenuation = 0;
light->angle_cutoff = M_PI;
// Insert light
lights.push_back(light);
}
else if (!strcmp(cmd, "camera")) {
// Read data
double px, py, pz, dx, dy, dz, ux, uy, uz, xfov, neardist, fardist;
if (fscanf(fp, "%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf", &px, &py, &pz, &dx, &dy, &dz, &ux, &uy, &uz, &xfov, &neardist, &fardist) != 12) {
fprintf(stderr, "Unable to read camera at command %d in file %s\n", command_number, filename);
return 0;
}
// Assign camera
camera.eye = R3Point(px, py, pz);
camera.towards = R3Vector(dx, dy, dz);
camera.towards.Normalize();
camera.up = R3Vector(ux, uy, uz);
camera.up.Normalize();
camera.right = camera.towards % camera.up;
camera.right.Normalize();
camera.up = camera.right % camera.towards;
camera.up.Normalize();
camera.xfov = xfov;
camera.yfov = xfov;
camera.neardist = neardist;
camera.fardist = fardist;
}
else if (!strcmp(cmd, "include")) {
// Read data
char scenename[256];
if (fscanf(fp, "%s", scenename) != 1) {
fprintf(stderr, "Unable to read include command %d in file %s\n", command_number, filename);
return 0;
}
// Get scene filename
char buffer[2048];
strcpy(buffer, filename);
char *bufferp = strrchr(buffer, '/');
if (bufferp) *(bufferp+1) = '\0';
else buffer[0] = '\0';
strcat(buffer, scenename);
// Read scene from included file
if (!Read(buffer, group_nodes[depth])) {
fprintf(stderr, "Unable to read included scene: %s\n", buffer);
return 0;
}
}
else if (!strcmp(cmd, "background")) {
// Read data
double r, g, b;
if (fscanf(fp, "%lf%lf%lf", &r, &g, &b) != 3) {
fprintf(stderr, "Unable to read background at command %d in file %s\n", command_number, filename);
return 0;
}
// Assign background color
background = R3Rgb(r, g, b, 1);
}
else if (!strcmp(cmd, "ambient")) {
// Read data
double r, g, b;
if (fscanf(fp, "%lf%lf%lf", &r, &g, &b) != 3) {
fprintf(stderr, "Unable to read ambient at command %d in file %s\n", command_number, filename);
return 0;
}
// Assign ambient color
ambient = R3Rgb(r, g, b, 1);
}
else {
fprintf(stderr, "Unrecognized command %d in file %s: %s\n", command_number, filename, cmd);
return 0;
}
// Increment command number
command_number++;
}
// Update bounding box
bbox = root->bbox;
// Provide default camera
if (camera.xfov == 0) {
double scene_radius = bbox.DiagonalRadius();
R3Point scene_center = bbox.Centroid();
camera.towards = R3Vector(0, 0, -1);
camera.up = R3Vector(0, 1, 0);
camera.right = R3Vector(1, 0, 0);
camera.eye = scene_center - 3 * scene_radius * camera.towards;
camera.xfov = 0.25;
camera.yfov = 0.25;
camera.neardist = 0.01 * scene_radius;
camera.fardist = 100 * scene_radius;
}
// Provide default lights
if (lights.size() == 0) {
// Create first directional light
R3Light *light = new R3Light();
R3Vector direction(-3,-4,-5);
direction.Normalize();
light->type = R3_DIRECTIONAL_LIGHT;
light->color = R3Rgb(1,1,1,1);
light->position = R3Point(0, 0, 0);
light->direction = direction;
light->radius = 0;
light->constant_attenuation = 0;
light->linear_attenuation = 0;
light->quadratic_attenuation = 0;
light->angle_attenuation = 0;
light->angle_cutoff = M_PI;
lights.push_back(light);
// Create second directional light
light = new R3Light();
direction = R3Vector(3,2,3);
direction.Normalize();
light->type = R3_DIRECTIONAL_LIGHT;
light->color = R3Rgb(0.5, 0.5, 0.5, 1);
light->position = R3Point(0, 0, 0);
light->direction = direction;
light->radius = 0;
light->constant_attenuation = 0;
light->linear_attenuation = 0;
light->quadratic_attenuation = 0;
light->angle_attenuation = 0;
light->angle_cutoff = M_PI;
lights.push_back(light);
}
// Close file
fclose(fp);
// Return success
return 1;
}
R3Mesh* Terrain::Patch(R3Point center, R2Point size, R2Point dps) { // dps: dots per side
R3Mesh *patch = new R3Mesh();
for (unsigned int r = 0; r < dps.Y(); r++) {
for (unsigned int c = 0; c < dps.X(); c++) {
double dx = (double)c / dps.X() * size.X() - size.X() / 2;
double dy = (r + c) % 2 * Util::UnitRandom(); // default
if (params.heightMap) {
int x = ((double)c / dps.X()) * params.heightMap->Width();
int y = ((double)r / dps.Y()) * params.heightMap->Height();
dy = 25 * params.heightMap->Pixel(x,y).Luminance();
}
double dz = (double)r / dps.Y() * size.Y() - size.Y() / 2;
R3Point position(center.X() + dx, center.Y() + dy, center.Z() + dz);
double tx = position.X() / 80;
double ty = position.Z() / 80;
//R2Point texcoord = R2Point(tx - ((int) tx), ty - ((int) ty));
//if (texcoord.X() < 0)
//texcoord.SetX(1 + texcoord.X());
//if (texcoord.Y() < 0)
//texcoord.SetY(1 + texcoord.Y());
patch->CreateVertex(position, R3Vector(0,1,0), R2Point(tx, ty)); // id's go up along x axis, then along y
}
}
for (unsigned int r = 0; r < dps.Y() - 1; r++) {
for (unsigned int c = 0; c < dps.X() - 1; c++) {
unsigned int cols = (unsigned int)dps.X();
unsigned int k = c + r * cols;
vector<R3MeshVertex*> vertices;
vertices.push_back(patch->Vertex(k+cols));
vertices.push_back(patch->Vertex(k+1));
vertices.push_back(patch->Vertex(k));
patch->CreateFace(vertices);
vector<R3MeshVertex*> vertices2;
vertices2.push_back(patch->Vertex(k+cols));
vertices2.push_back(patch->Vertex(k+1+cols));
vertices2.push_back(patch->Vertex(k+1));
patch->CreateFace(vertices2);
}
}
patch->Update();
return patch;
}
int
main(int argc, char **argv)
{
// Look for help
for (int i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-help")) {
ShowUsage();
}
}
// Read input and output mesh filenames
if (argc < 3) ShowUsage();
argv++, argc--; // First argument is program name
char *input_mesh_name = *argv; argv++, argc--;
char *output_mesh_name = *argv; argv++, argc--;
// Allocate mesh
R3Mesh *mesh = new R3Mesh();
if (!mesh) {
fprintf(stderr, "Unable to allocate mesh\n");
exit(-1);
}
// Read input mesh
if (!mesh->Read(input_mesh_name)) {
fprintf(stderr, "Unable to read mesh from %s\n", input_mesh_name);
exit(-1);
}
// Parse arguments and perform operations
while (argc > 0) {
if (!strcmp(*argv, "-twist")) {
CheckOption(*argv, argc, 2);
double angle = atof(argv[1]);
argv += 2, argc -= 2;
mesh->Twist(angle);
}
else if (!strcmp(*argv, "-taubin")) {
CheckOption(*argv, argc, 4);
double lambda = atof(argv[1]);
double mu = atof(argv[2]);
double iters = atoi(argv[3]);
argv += 4, argc -= 4;
mesh->Taubin(lambda, mu, iters);
}
else if (!strcmp(*argv, "-loop")) {
CheckOption(*argv, argc, 1);
argv += 1, argc -= 1;
mesh->Loop();
}
else {
// Unrecognized program argument
fprintf(stderr, "meshpro: invalid option: %s\n", *argv);
ShowUsage();
}
}
// Write output mesh
if (!mesh->Write(output_mesh_name)) {
fprintf(stderr, "Unable to write mesh to %s\n", output_mesh_name);
exit(-1);
}
// Delete mesh
delete mesh;
// Return success
return EXIT_SUCCESS;
}
