void ShowRotation(Basis_3& xyz_basis,void drawfunc(void),int swappages){
Basis_3 rot(1,0,0,
0,1,0,
0,0,1);
float alf;
int page=0,ind,cont=0;
char h;
if(swappages){
setactivepage(page);
setvisualpage(page);
}
cleardevice();
drawfunc();
do{
while(kbhit())h=getch();
switch(h){
case 'x':
ind=1;
break;
case 'X':
ind=-1;
break;
case 'y':
ind=2;
break;
case 'Y':
ind=-2;
break;
case 'z':
ind=3;
break;
case 'Z':
ind=-3;
break;
case ' ':
cont=1-cont;
h=0;
break;
default:
ind=0;
}
if(ind){
if(ind<0){
ind=-ind;
ind--;
alf=-0.1; //-rot[ind].angle;
}
else { alf=0.1;--ind;} //rot[--ind].angle;
xyz_basis=RotateBasis(xyz_basis,rot.vec[ind],alf);
if(swappages)setactivepage(page=1-page);
cleardevice();
drawfunc();
if(swappages)setvisualpage(page);
ind=0;
if(!cont)h=0;
}
}while(h!=27);
}
void redraw(void (*drawfunc)(Screencell*,unsigned int,unsigned int),bool copyover,bool forceredraw){
unsigned int scrwidth,scrheight;
tie(scrwidth,scrheight)=IO::screensize();
const bool validprev=prevscreen&&scrwidth==prevwidth&&scrheight==prevheight;
Screencell *newscreen=new Screencell[scrwidth*scrheight];
//cerr<<"redraw: validprev="<<validprev<<" copyover="<<copyover<<" prevscreen?="<<!!prevscreen<<endl;
if(copyover&&validprev)
memcpy(newscreen,prevscreen,scrwidth*scrheight*sizeof(Screencell));
drawfunc(newscreen,scrwidth,scrheight);
if(!validprev||forceredraw){
copytoscreen(newscreen,scrwidth,0,0,scrwidth,scrheight);
if(prevscreen)delete[] prevscreen;
prevwidth=scrwidth;
prevheight=scrheight;
prevscreen=new Screencell[scrwidth*scrheight];
assert(prevscreen);
memcpy(prevscreen,newscreen,scrwidth*scrheight*sizeof(Screencell));
} else {
unsigned int x,y;
for(y=0;y<scrheight;y++){
for(x=0;x<scrwidth;x++){
if(prevscreen[scrwidth*y+x]!=newscreen[scrwidth*y+x])break;
}
if(x<scrwidth){
//cerr<<"refreshing line "<<y<<" (diff at x="<<x<<')'<<endl;
copylinetoscreen(newscreen,scrwidth,0,y,scrwidth);
}
}
memcpy(prevscreen,newscreen,scrwidth*scrheight*sizeof(Screencell));
}
gotoFrontBufferCursor();
cout.flush();
}
void PolyTriangleDrawer::draw_shaded_triangle(const TriVertex *vert, bool ccw, TriDrawTriangleArgs *args, WorkerThreadData *thread, void(*drawfunc)(const TriDrawTriangleArgs *, WorkerThreadData *))
{
// Cull, clip and generate additional vertices as needed
TriVertex clippedvert[max_additional_vertices];
int numclipvert;
clipedge(vert, clippedvert, numclipvert);
// Map to 2D viewport:
for (int j = 0; j < numclipvert; j++)
{
auto &v = clippedvert[j];
// Calculate normalized device coordinates:
v.w = 1.0f / v.w;
v.x *= v.w;
v.y *= v.w;
v.z *= v.w;
// Apply viewport scale to get screen coordinates:
v.x = viewport_x + viewport_width * (1.0f + v.x) * 0.5f;
v.y = viewport_y + viewport_height * (1.0f - v.y) * 0.5f;
}
// Draw screen triangles
if (ccw)
{
for (int i = numclipvert; i > 1; i--)
{
args->v1 = &clippedvert[numclipvert - 1];
args->v2 = &clippedvert[i - 1];
args->v3 = &clippedvert[i - 2];
drawfunc(args, thread);
}
}
else
{
for (int i = 2; i < numclipvert; i++)
{
args->v1 = &clippedvert[0];
args->v2 = &clippedvert[i - 1];
args->v3 = &clippedvert[i];
drawfunc(args, thread);
}
}
}
static void _skycolumn (void (*drawfunc)(void), int x)
{
dc_yl = _skypl->top[x];
dc_yh = _skypl->bottom[x];
if (dc_yl != -1 && dc_yl <= dc_yh)
{
int angle = ((((viewangle + xtoviewangle[x])^skyflip)>>sky1shift) + frontpos)>>16;
dc_texturefrac = dc_texturemid + (dc_yl - centery + 1) * dc_iscale;
dc_source = R_GetColumnData(skytex, angle);
drawfunc ();
}
