triple_t diffuse_illumination(
model_t *model, /* pointer to model structure */
obj_t *hitobj) /* object that was hit by the ray */
{
/****variables****/
obj_t *currlight;
list_t *lightlist;
triple_t total_illumination;
triple_t processed_light;
/*****************/
//Point to list of lights in the model
lightlist = model->lights;
//Initialize to zero
total_illumination = tl_scale3(&total_illumination, 0);
processed_light = tl_scale3(&processed_light, 0);
//Reset list so that position points to head
l_reset(lightlist);
//Walk through the lights list and process each light
//Sum up the total illumination
while((currlight = l_get(lightlist)) != NULL)
{
processed_light = process_light(model->scene, hitobj, currlight->lightData);
total_illumination = tl_sum3(&total_illumination, &processed_light);
}
return total_illumination;
}
void S_render(Screen * screen)
{
for(size_t i = 0;i < l_length(&screen->mRenderQueue);i++)
{
imgKey key = l_get(&screen->mRenderQueue,i)->mKey;
S_apply(screen,&key.mImage);
}
}
/** model_dump **/
void model_dump(model_t *model) {
/****variables****/
obj_t *obj;
int ctr;
int flag;
/*****************/
l_reset(model->scene);
l_reset(model->lights);
while ((obj = l_get(model->scene)) != NULL)
{
flag = 0;
for(ctr = 0; ctr < (sizeof(helper)/sizeof(*helper)); ctr++) {
if(strcmp(obj->objclass, (helper[ctr]).objecttype) == 0) {
(helper[ctr]).dump(obj);
flag = 1;
break;
}
}
if(flag == 0) {
fprintf(stderr, "Bad class\n");
exit(1);
}
}
while ((obj = l_get(model->lights)) != NULL)
{
flag = 0;
for(ctr = 0; ctr < (sizeof(helper)/sizeof(*helper)); ctr++) {
if(strcmp(obj->objclass, helper[ctr].objecttype) == 0) {
helper[ctr].dump(obj);
flag = 1;
break;
}
}
if(flag == 0) {
fprintf(stderr, "Bad class\n");
exit(1);
}
}
}
obj_t *find_closest_obj(list_t *scene, triple_t *base, triple_t *unitDir, obj_t *lasthit){
/****variables****/
obj_t *obj;
obj_t *clstobj;
double dist;
/*****************/
// Reset the scene list and initate variables
l_reset(scene);
clstobj = NULL;
obj = NULL;
dist = 0;
// Run through the scene list
while ((obj = ((obj_t *)l_get(scene))) != NULL)
{
// If the object is the last hit, don't do anything as it is a waste
if(obj != lasthit) {
// Call the object's hits function
dist = obj->sceneData->hits(base, unitDir, obj);
// If the distance is negative, it missed
if(dist > 0) {
// First hit scenario -- auto assigns
if(clstobj == NULL) {
clstobj = obj;
}
else {
// Multiple hit objects scenario -- checks to see who is closest
if(dist < clstobj->sceneData->distance){
clstobj = obj;
}
}
}
}
}
return clstobj;
}
