void RayTracer::read_lights(){
for(int i= 0; i <scene->Lights.getLength(); i++){
SoLight * light = (SoLight *) scene->Lights[i];
SoType light_type = light->getTypeId();
if(light->on.getValue() == true){
if(light_type == SoPointLight::getClassTypeId()){
SoPointLight * point_light = (SoPointLight*) light;
SbVec3f location = point_light->location.getValue();
float intensity = point_light->intensity.getValue();
SbVec3f color = point_light->color.getValue();
Light * new_light = new Light(location, intensity, color);
lights.push_back(*new_light);
}
}
}
}
int main(int argc, char **argv)
{
using namespace std;
int numObjects;
long nRows, nCols;
char **error;
if (argc < 4)
{
fprintf(stderr,"Usage: lab1 <input file> <output file> <rows>\n");
return -1;
}
filename = (char*)malloc(sizeof(char)*strlen(argv[2]));
strcpy(filename, argv[2]);
error = (char**)malloc(sizeof(char**)*10);
nRows = strtol(argv[3],error,10);
if (**error)
{
fprintf(stderr,"Error! use a number for rows!\n");
return -2;
}
free(error);
SoDB::init();
OSUInventorScene *scene = new OSUInventorScene(argv[1]);
//check to see if there are objects
if (numObjects = scene->Objects.getLength() < 1)
{
fprintf(stderr,"Error, no objects");
return -2;
}
//get the objects and put them into a list
for (int i = 0; i < scene->Objects.getLength(); i++)
{
OSUObjectData *obj = (OSUObjectData *)scene->Objects[i];
/*
if (!obj->Check())
{
fprintf(stderr,"Error detected in OSUObjectData for object %i.\n",i);
return 20;
}
*/
SoType shape_type = obj->shape->getTypeId();
if (shape_type == SoSphere::getClassTypeId())
{
Sphere *sp = new Sphere;
SoSphere * sphere = (SoSphere *) obj->shape;
SoTransform * transformation = obj->transformation;
SbVec3f scale_vector = transformation->scaleFactor.getValue();
SbVec3f translation_vector = transformation->translation.getValue();
sp->radius = 1;
sp->center = Point(0,0,0,1);
//do the materials stuff
SoMaterial * material = obj->material;
sp->color = rgb(material->diffuseColor[0][0],material->diffuseColor[0][1],material->diffuseColor[0][2]);
sp->specular = rgb(material->specularColor[0][0], material->specularColor[0][1],material->specularColor[0][2]);
sp->ambient = rgb(material->ambientColor[0][0], material->ambientColor[0][1], material->ambientColor[0][2]);
sp->shininess = material->shininess[0];
sp->trans = material->transparency[0];
printf("Object %d has shininess %f\n", sp->object_number, sp->shininess);
//let's get our translation space matrix
//void getTranslationSpaceMatrix(SbMatrix &mat, SbMatrix &inv) const
SbMatrix tmat, tinv, smat, sinv, rmat, rinv;
transformation->getTranslationSpaceMatrix(tmat, tinv);
// transformation->getScaleSpaceMatrix(smat,sinv);
transformation->getRotationSpaceMatrix(rmat, rinv);
// SbMatrix & multRight(const SbMatrix &m)
sp->M = tmat;
sp->Mi = tinv;
sp->M.transpose();
sp->Mi.transpose();
sp->type = eSPHERE;
//texture data
SoSFImage image;
int nc;
SbVec2s size;
const unsigned char *texelArray;
// get properties of object
//obj = (OSUObjectData *)worldptr->scene->Objects[i];
if (obj->texture != NULL)
{
image = obj->texture->image;
texelArray = image.getValue(size,nc); // sets 'size', 'nc', 'texelArray'
sp->image = texelArray[0];
printf("\nimage value = %d\n",texelArray[0]);
}
objects.push_back(sp);
sp->object_number = i;
}
if (shape_type == SoCube::getClassTypeId())
{
Box *sp = new Box;
SoSphere * sphere = (SoSphere *) obj->shape;
SoTransform * transformation = obj->transformation;
SbVec3f scale_vector = transformation->scaleFactor.getValue();
SbVec3f translation_vector = transformation->translation.getValue();
sp->center = Point(0,0,0,1);
//do the materials stuff
SoMaterial * material = obj->material;
sp->color = rgb(material->diffuseColor[0][0],material->diffuseColor[0][1],material->diffuseColor[0][2]);
sp->specular = rgb(material->specularColor[0][0], material->specularColor[0][1],material->specularColor[0][2]);
sp->ambient = rgb(material->ambientColor[0][0], material->ambientColor[0][1], material->ambientColor[0][2]);
sp->shininess = material->shininess[0];
sp->trans = material->transparency[0];
printf("Object %d has shininess %f\n", sp->object_number, sp->shininess);
//let's get our translation space matrix
//void getTranslationSpaceMatrix(SbMatrix &mat, SbMatrix &inv) const
SbMatrix tmat, tinv, smat, sinv, rmat, rinv;
transformation->getTranslationSpaceMatrix(tmat, tinv);
// transformation->getScaleSpaceMatrix(smat,sinv);
transformation->getRotationSpaceMatrix(rmat, rinv);
// list triangles
// SbMatrix & multRight(const SbMatrix &m)
sp->M = tmat;
sp->Mi = tinv;
sp->M.transpose();
sp->Mi.transpose();
SoSFImage image;
int nc;
SbVec2s size;
const unsigned char *texelArray;
// get properties of object
//obj = (OSUObjectData *)worldptr->scene->Objects[i];
if (obj->texture != NULL)
{
image = obj->texture->image;
texelArray = image.getValue(size,nc); // sets 'size' // list triangles
printf("\nimage value = %d\n",texelArray[0]);
sp->image = texelArray[0];
}
objects.push_back(sp);
sp->type = eCUBE;
sp->object_number = i;
}
if (shape_type == SoIndexedTriangleStripSet::getClassTypeId())
{
SoIndexedTriangleStripSet * triangle_strip_set =
(SoIndexedTriangleStripSet *) obj->shape;
if (obj->points == NULL)
{
cout << " Error: Points missing for indexed triangle strip set.";
}
else if (obj->points->getTypeId() != SoCoordinate3::getClassTypeId())
{
cout << " Error: Incorrect format for point list." << endl;
cout << " Expected list of 3D coordinates.";
}
else
{
SoCoordinate3 * coord = (SoCoordinate3 *) obj->points;
int numv = coord->point.getNum();
cout << " Surface has " << numv << " vertices." << endl;
for (int i = 0; i < numv; i++)
{
cout << " Vertex " << i << " = ("
<< coord->point[i][0] << ", "
<< coord->point[i][1] << ", "
<< coord->point[i][2] << ")." << endl;
}
if (obj->normals == NULL)
{
cout << " No stored normals." << endl;
}
else
{
int num_normals = obj->normals->vector.getNum();
if (num_normals != numv)
{
// assume PER_VERTEX normal binding
cout << "Error: Number of normals does not equal number of vertices." << endl;
}
else
{
for (int i = 0; i < num_normals; i++) {
cout << " Normal " << i << " = ("
<< obj->normals->vector[i][0] << ", "
<< obj->normals->vector[i][1] << ", "
<< obj->normals->vector[i][2] << ")." << endl;
}
}
}
/*
// list triangles
int itriangle = 0;
int icoord = 0;
int coord_list_length = triangle_strip_set->coordIndex.getNum();
while (icoord < coord_list_length) {
int c0 = SO_END_STRIP_INDEX;
int c1 = SO_END_STRIP_INDEX;
int c2 = SO_END_STRIP_INDEX;
while (icoord < coord_list_length &&
triangle_strip_set->coordIndex[icoord] != SO_END_STRIP_INDEX) { c2 = triangle_strip_set->coordIndex[icoord];
if (c0 != SO_END_STRIP_INDEX && c1 != SO_END_STRIP_INDEX) {
cout << " Triangle " << itriangle
<< " coordinate indices = ( "
<< c0 << ", " << c1 << ", " << c2 << " )." << endl;
itriangle++;
};
icoord++;
c0 = c1;
c1 = c2;
}
}
*/
}
}
free(obj);
}
printf("Number of objects seen %d\n", objects.size());
printf("Setting up camera\n");
/*********************************************************************
* Camera Setup
*
*********************************************************************/
SoCamera * cam = scene->Camera;
if (scene->Camera == NULL)
{
printf("No camera found. Setting Default/n");
camera.aspect = 1;
camera.position = Point(0,0,0,1);
camera.n = Vector(0,0,-1,0);
camera.v = Vector(0,1,0,0);
camera.u = cross(camera.n,camera.v);
camera.height_angle = M_PI/2;
}
else
{
SbVec3f camera_position = cam->position.getValue();
SbRotation cam_orientation = cam->orientation.getValue();
SbVec3f camera_rotation_axis;
float cam_rotation_angle;
cam_orientation.getValue(camera_rotation_axis, cam_rotation_angle);
float cam_aspect_ratio = cam->aspectRatio.getValue();
SoType cam_type = cam->getTypeId();
//Let's grab the aspect ratio
nCols =(int)( nRows*cam_aspect_ratio);
camera.aspect = cam_aspect_ratio;
printf("Number of rows is %d columns is %d with an aspect ratio of %f\n",nRows,nCols,cam_aspect_ratio);
// calculate camera direction and camera up direction
SbVec3f camera_direction, camera_up;
cam_orientation.multVec(SbVec3f(0, 0, -1), camera_direction);
cam_orientation.multVec(SbVec3f(0, 1, 0), camera_up);
camera.n = -1*Vector(camera_direction[0],camera_direction[1],camera_direction[2],0);
camera.v = -1*Vector(camera_up[0],camera_up[1],camera_up[2],0);
camera.position = Point(camera_position[0],camera_position[1],camera_position[2],1);
camera.u = cross(camera.n,camera.v);
if (cam_type == SoPerspectiveCamera::getClassTypeId()) {
// camera is a perspective camera
SoPerspectiveCamera * perspective_camera = (SoPerspectiveCamera *) cam;
float camera_height_angle = perspective_camera->heightAngle.getValue();
camera.height_angle = camera_height_angle;
}
}
N = 1;
pixH = 2*tan(camera.height_angle/2)/nCols;
pixW = 2*tan(camera.height_angle/2)/nRows;
printf("Camera position is %f %f %f\n",camera.position.x,camera.position.y, camera.position.z);
printf("Camera n is %f %f %f\n",camera.n.x,camera.n.y, camera.n.z);
printf("Camera v is %f %f %f\n",camera.v.x,camera.v.y, camera.v.z);
printf("Camera u is %f %f %f\n",camera.u.x,camera.u.y, camera.u.z);
printf("N is %f\n",N);
//setup for lights
// list lights
for (int j = 0; j < scene->Lights.getLength(); j++) {
SoLight * flight = (SoLight *) scene->Lights[j];
SoType light_type = flight->getTypeId();
SoSFColor lightColor;
SbColor lightClr;
float lightr,lightg,lightb;
lightColor = flight->color;
light *l = new light;
l->color = rgb(lightClr[0],lightClr[1],lightClr[2]);
l->intensity = flight->intensity.getValue();
if (light_type == SoPointLight::getClassTypeId())
{
SoPointLight * point_light = (SoPointLight *) flight;
SbVec3f location = point_light->location.getValue();
l->center = Point(location[0],location[1],location[2],1);
l->type = ePOINT;
}
else if (light_type == SoSpotLight::getClassTypeId())
{
SoSpotLight * spot_light = (SoSpotLight *) flight;
SbVec3f location = spot_light->location.getValue();
l->center = Point(location[0], location[1], location[2],1);
l->theta = spot_light->cutOffAngle.getValue();
l->drop_off = spot_light->dropOffRate.getValue();
SbVec3f direction = spot_light->direction.getValue();
Vector lightDir(direction[0], direction[1], direction[2],0);
l->dir = lightDir;
l->type=eHOOD;
}
else if (light_type == SoDirectionalLight::getClassTypeId())
{
l->type = eDIR;
SoDirectionalLight * dir_light = (SoDirectionalLight *) flight;
SbVec3f direction = dir_light->direction.getValue();
Vector lightDir(direction[0], direction[1], direction[2],0);
l->dir = lightDir;
}
lights.push_back(l);
}
//start our tracer
trace(objects, nRows, nCols, 1);
//let's free our vector pointers
int x = objects.size() - 1;
fprintf(stderr,"Freeing objects\n");
while (x >= 0)
{
delete objects[x];
// printf("freeing object %d\n",x);
x--;
}
x = lights.size() - 1;
fprintf(stderr,"Freeing lights\n");
while (x >= 0)
{
delete lights[x];
x--;
}
}