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Code Issues Releases Wiki Activity

Better handling of behind-the-camera objects.

Browse Source 
Every point that is behind the camera is moved to the clipping plane by
orthographic projection. It is obviously incorrect, but this is a very rare
case, and proper clipping of Bezier curves is not that easy.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26065 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
eugeni 2008-02-22 19:31:49 +00:00
parent 59f43e8231
commit dd8c7c9e2c
1 changed files with 3 additions and 2 deletions

5
libass/ass_render.c
View File

@ -1623,6 +1623,7 @@ static inline void transform_point_3d(double *a, double *m, double *b)
*/
static inline void transform_vector_3d(FT_Vector* v, double *m) {
const double camera = 2500 * frame_context.border_scale; // camera distance
const double cutoff_z = 10.;
double a[4], b[4];
a[0] = d6_to_double(v->x);
a[1] = d6_to_double(v->y);
@ -1641,8 +1642,8 @@ static inline void transform_vector_3d(FT_Vector* v, double *m) {
b[0] *= camera;
b[1] *= camera;
b[3] = 8 * b[2] + camera;
if (b[3] < 0.001 && b[3] > -0.001)
b[3] = b[3] < 0. ? -0.001 : 0.001;
if (b[3] < cutoff_z)
b[3] = cutoff_z;
v->x = double_to_d6(b[0] / b[3]);
v->y = double_to_d6(b[1] / b[3]);
}