Render::Render (Scene s) {
int i,j;
Video v;
Reta r;
Vetor du,dv;
Vetor ini,pos;
PointsShaded=0;
RaysShooted=0;
du=s.Proj.u*(Float (s.Wx)/Float (s.Rx));
dv=s.Proj.v*(Float (s.Wy)/Float (s.Ry));
ini=s.Proj.o+dv*s.y1;
v.WaitForKey ();
v.Init ();
for (j=s.y1; j<=s.y2; j++) {
pos=ini+du*s.x1;
for (i=s.x1; i<=s.x2; i++) {
r.TwoPoints (s.Obs,pos);
r.Normalize ();
v.Point (i,j,v.Inclui (Cor (ShootRay (r,s,0))));
PointsShaded++;
pos+=du;
if (v.KeyPressed ()) {
v.Close ();
return;
}
}
ini+=dv;
}
v.WaitForKey ();
v.Close ();
}
Vector ShootRay (Reta R, double Relative) {
PointList *P;
Point *hit;
Vector Target;
Vector color;
Vector Normal;
Vector Zero (0,0,0);
Reta S;
if (Relative<reflection)
return Zero;
RaysShooted++;
P=new PointList;
scene->Intersect (R,P);
hit=P->First ();
if (hit!=NULL) {
Target=R.O+R.R*hit->t;
Normal=hit->owner->Normal (Target);
color=lightlist->Shade (Target,Normal,scene);
delete P;
if (hit->owner->surface->GetKs()!=0.0) {
S.O=Target+Normal*epsilon;
S.R=R.R-Normal*(R.R*Normal)*2.0;
return
hit->owner->surface->Apply
(color,ShootRay (S,Relative*hit->owner->surface->GetKs()));
}
else
return hit->owner->surface->Apply (color,Zero);
}
else {
delete P;
return Zero;
}
}
void Draw (int x1, int y1, int length) {
Vector t1,t2,t3,t4;
int x2,y2;
x2=x1+length-1;
y2=y1+length-1;
if (length==2) {
Pixels+=4;
PutPixel (x1,y1,MakeRGB (ShootRay (BuildReta (x1,y1),1.0)));
PutPixel (x2,y1,MakeRGB (ShootRay (BuildReta (x2,y1),1.0)));
PutPixel (x1,y2,MakeRGB (ShootRay (BuildReta (x1,y2),1.0)));
PutPixel (x2,y2,MakeRGB (ShootRay (BuildReta (x2,y2),1.0)));
}
else {
int factor;
t1=ShootRay (BuildReta (x1,y1),1.0);
t2=ShootRay (BuildReta (x2,y1),1.0);
t3=ShootRay (BuildReta (x1,y2),1.0);
t4=ShootRay (BuildReta (x2,y2),1.0);
if (diff (t1,t2)+diff (t2,t3)+diff (t3,t4)+diff (t4,t1)>threshold) {
factor=length/2;
Draw (x1,y1,factor);
Draw (x1+factor,y1,factor);
Draw (x1,y1+factor,factor);
Draw (x1+factor,y1+factor,factor);
}
else {
int i,j;
double alpha,beta;
Vector p1,p2,p3;
Pixels+=4;
if (interpolation) {
alpha=1.0/double (x2-x1);
beta=1.0/double (y2-y1);
p1=t1;
p2=t3;
for (i=x1; i<=x2; i++) {
p3=p1;
for (j=y1; j<=y2; j++) {
PutPixel (i,j,MakeRGB (p3));
p3+=(p2-p1)*beta;
}
p1+=(t2-t1)*alpha;
p2+=(t4-t3)*alpha;
}
}
else {
int i,j;
for (i=x1; i<=x2; i++)
for (j=y1; j<=y2; j++)
PutPixel (i,j,MakeRGB (t1));
}
}
}
}
void CCameraRayScan::ShootRayInt(ECameraRays camRay, const Vec3 &rayPos, const Vec3 &rayDir, const float &len, IPhysicalEntity **pSkipEnts, int numSkipEnts)
{
if(camRay < eNUM_RAYS)
{
if(m_rayInfo[camRay].rayID == INVALID_RAY_ID)
{
m_rayInfo[camRay].dir = rayDir;
m_rayInfo[camRay].rayID = ShootRay(rayPos, rayDir * len, g_objTypes, g_geomFlags, pSkipEnts, numSkipEnts);
}
}
}
