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svn path=/trunk/boinc/; revision=2494
This commit is contained in:
Oliver Wang 2003-10-16 23:31:43 +00:00
parent 1bda0b0bc0
commit 627d94da2b
1 changed files with 30 additions and 11 deletions
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41
api/gutil.C
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@ -934,19 +934,38 @@ void STARFIELD::build_stars(int sz, float sp) {
bool STARFIELD::is_visible(int i)
{
float dist;
float d[3] = {(camera[0]-stars[i].x),
(camera[1]-stars[i].y),
(camera[2]-stars[i].z)};
dist=sqrt(d[0]*d[0] + d[1]*d[1] + d[2]*d[2]);
normalize(d);
bool inside;
double model[16];
double proj[16];
int view[4];
get_matrix(model);
get_projection(proj);
glMatrixMode(GL_MODELVIEW);
view[0]=0;
view[1]=0;
view[2]=1;
view[3]=1;
double out[3];
get_2d_positions(stars[i].x,stars[i].y,stars[i].z,model,proj,view,out);
if(out[0]>0 && out[0]<1 &&
out[1]>0 && out[1]<1 && out[2]<1) inside=true;
else inside=false;
//note returns a cone, not a pyramid
//fix: project to up-eye plane & right-eye plane
if(speed<0)
return(dotProd(eye[0],eye[1],eye[2],d[0],d[1],d[2]) > COS_30 && dist<1500.f);
if(speed>0)
{
return inside;
}
else
return(dotProd(eye[0],eye[1],eye[2],d[0],d[1],d[2]) > COS_30);
{
float dist;
float d[3] = {(camera[0]-stars[i].x),
(camera[1]-stars[i].y),
(camera[2]-stars[i].z)};
dist=sqrt(d[0]*d[0] + d[1]*d[1] + d[2]*d[2]);
return(inside && dist<1500);
}
}
void STARFIELD::update_stars(float dt)