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LMAO fisheye

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This commit is contained in:
fickleheart 2020-01-14 23:30:19 -06:00
parent c25e969676
commit cd957d84f7
1 changed files with 24 additions and 5 deletions
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25
src/r_main.c
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@ -564,7 +564,7 @@ static struct {
void R_CheckViewMorph(void)
{
float zoomfactor, rollcos, rollsin;
float x1, y1, x2, y2;
float x1, y1, x2, y2, fisheyef;
fixed_t temp;
size_t end, vx, vy, pos, usedpos;
INT32 usedx, usedy, halfwidth = vid.width/2, halfheight = vid.height/2;
@ -574,14 +574,14 @@ void R_CheckViewMorph(void)
// temp values
//angle_t rollangle = leveltime << (ANGLETOFINESHIFT);
fixed_t fisheye = 0;
fixed_t fisheye = FRACUNIT;
rollangle >>= ANGLETOFINESHIFT;
rollangle = (((rollangle+1)/2)*2) & FINEMASK; // Limit the distinct number of angles to reduce recalcs from angles changing a lot.
fisheye &= ~0xFF; // Same limiter logic for fisheye
if (rollangle == viewmorph.rollangle && fisheye == viewmorph.fisheye)
if (rollangle == viewmorph.rollangle && fisheye == viewmorph.fisheye && viewmorph.scrmapsize == vid.width*vid.height)
return; // No change
viewmorph.rollangle = rollangle;
@ -614,6 +614,13 @@ 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;
if (fisheye)
{
float dist = powf(2, (fisheyef = FIXED_TO_FLOAT(fisheye))/2);
x1 *= dist;
y1 *= dist;
}
temp = max(x1, y1)*FRACUNIT;
if (temp < FRACUNIT)
temp = FRACUNIT;
@ -651,9 +658,21 @@ void R_CheckViewMorph(void)
y1 += rollcos;
for (vx = 0; vx < vid.width; vx++)
{
if (fisheye)
{
float dist = sqrtf(x2*x2 + y2*y2) * zoomfactor / sqrtf(halfwidth*halfwidth + halfheight*halfheight);
dist += (1 - sqrtf(1 - dist*dist)) / dist;
dist = powf(dist, fisheyef);
usedx = halfwidth+x2*dist;
usedy = halfheight+y2*dist;
}
else
{
usedx = halfwidth+x2;
usedy = halfheight+y2;
}
if (usedx < 0) usedx = 0;
else if (usedx >= vid.width) usedx = vid.width-1;