virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

avfilter/vf_v360: fix mercator_to_xyz()

Browse Source
This commit is contained in:
Paul B Mahol 2019-09-22 20:52:40 +02:00
parent b4d2bea647
commit a8925d264a
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
libavfilter/vf_v360.c
View File

@ -1589,17 +1589,18 @@ static void mercator_to_xyz(const V360Context *s,
int i, int j, int width, int height,
float *vec)
{
const float phi = ((2.f * i) / width - 1.f) * M_PI;
const float theta = atanf(sinhf(((2.f * j) / height - 1.f) * 2.f * M_PI));
const float phi = ((2.f * i) / width - 1.f) * M_PI + M_PI_2;
const float y = ((2.f * j) / height - 1.f) * M_PI;
const float div = expf(2.f * y) + 1.f;
const float sin_phi = sinf(phi);
const float cos_phi = cosf(phi);
const float sin_theta = sinf(theta);
const float cos_theta = cosf(theta);
const float sin_theta = -2.f * expf(y) / div;
const float cos_theta = -(expf(2.f * y) - 1.f) / div;
vec[0] = cos_theta * sin_phi;
vec[1] = -sin_theta;
vec[2] = -cos_theta * cos_phi;
vec[0] = sin_theta * cos_phi;
vec[1] = cos_theta;
vec[2] = sin_theta * sin_phi;
}
/**