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Fisheye lens experiments

This commit is contained in:
fickleheart 2020-01-17 20:39:38 -06:00
parent 2b7d75126e
commit 64c4a4c02c
1 changed files with 83 additions and 3 deletions
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86
src/r_main.c
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@ -549,14 +549,29 @@ static inline void R_InitLightTables(void)
}
}
//#define WOUGHMP_WOUGHMP // I got a fish-eye lens - I'll make a rap video with a couple of friends
// it's kinda laggy sometimes
static struct {
angle_t rollangle; // pre-shifted by fineshift
#ifdef WOUGHMP_WOUGHMP
fixed_t fisheye;
#endif
fixed_t zoomneeded;
INT32 *scrmap;
size_t scrmapsize;
boolean use;
} viewmorph = {0, FRACUNIT, NULL, 0, false};
} viewmorph = {
0,
#ifdef WOUGHMP_WOUGHMP
0,
#endif
FRACUNIT,
NULL,
0,
false
};
void R_CheckViewMorph(void)
{
@ -565,18 +580,39 @@ void R_CheckViewMorph(void)
fixed_t temp;
size_t end, vx, vy, pos, usedpos;
INT32 usedx, usedy, halfwidth = vid.width/2, halfheight = vid.height/2;
#ifdef WOUGHMP_WOUGHMP
float fisheyemap[MAXVIDWIDTH/2 + 1];
#endif
angle_t rollangle = players[displayplayer].viewrollangle;
#ifdef WOUGHMP_WOUGHMP
fixed_t fisheye = cv_cam2_turnmultiplier.value; // temporary test value
#endif
rollangle >>= ANGLETOFINESHIFT;
rollangle = (((rollangle+1)/2)*2) & FINEMASK; // Limit the distinct number of angles to reduce recalcs from angles changing a lot.
if (rollangle == viewmorph.rollangle && viewmorph.scrmapsize == vid.width*vid.height)
#ifdef WOUGHMP_WOUGHMP
fisheye &= ~0x7FF; // Same
#endif
if (rollangle == viewmorph.rollangle &&
#ifdef WOUGHMP_WOUGHMP
fisheye == viewmorph.fisheye &&
#endif
viewmorph.scrmapsize == vid.width*vid.height)
return; // No change
viewmorph.rollangle = rollangle;
#ifdef WOUGHMP_WOUGHMP
viewmorph.fisheye = fisheye;
#endif
if (viewmorph.rollangle == 0)
if (viewmorph.rollangle == 0
#ifdef WOUGHMP_WOUGHMP
&& viewmorph.fisheye == 0
#endif
)
{
viewmorph.use = false;
if (viewmorph.zoomneeded != FRACUNIT)
@ -603,6 +639,22 @@ void R_CheckViewMorph(void)
x1 = (vid.width*fabsf(rollcos) + vid.height*fabsf(rollsin)) / vid.width;
y1 = (vid.height*fabsf(rollcos) + vid.width*fabsf(rollsin)) / vid.height;
#ifdef WOUGHMP_WOUGHMP
if (fisheye)
{
float f = FIXED_TO_FLOAT(fisheye);
for (vx = 0; vx <= halfwidth; vx++)
fisheyemap[vx] = 1.0f / cos(atan(vx * f / halfwidth));
f = cos(atan(f));
if (f < 1.0f)
{
x1 /= f;
y1 /= f;
}
}
#endif
temp = max(x1, y1)*FRACUNIT;
if (temp < FRACUNIT)
temp = FRACUNIT;
@ -632,6 +684,34 @@ void R_CheckViewMorph(void)
//CONS_Printf("Top left corner is %f %f\n", x1, y1);
#ifdef WOUGHMP_WOUGHMP
if (fisheye)
{
for (vy = 0; vy < halfheight; vy++)
{
x2 = x1;
y2 = y1;
x1 -= rollsin;
y1 += rollcos;
for (vx = 0; vx < vid.width; vx++)
{
usedx = halfwidth + x2*fisheyemap[(int) floorf(fabsf(y2*zoomfactor))];
usedy = halfheight + y2*fisheyemap[(int) floorf(fabsf(x2*zoomfactor))];
usedpos = usedx + usedy*vid.width;
viewmorph.scrmap[pos] = usedpos;
viewmorph.scrmap[end-pos] = end-usedpos;
x2 += rollcos;
y2 += rollsin;
pos++;
}
}
}
else
#endif
for (vy = 0; vy < halfheight; vy++)
{
x2 = x1;