diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_geom.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_geom.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c index e10229f11da..cd726179f56 100644 --- a/source/blender/blenlib/intern/math_geom.c +++ b/source/blender/blenlib/intern/math_geom.c @@ -2399,6 +2399,33 @@ void resolve_quad_uv(float r_uv[2], const float st[2], const float st0[2], const #undef IS_ZERO +/* reverse of the functions above */ +void interp_bilinear_quad_v3(float data[4][3], float u, float v, float res[3]) +{ + float vec[3]; + + copy_v3_v3(res, data[0]); + mul_v3_fl(res, (1 - u) * (1 - v)); + copy_v3_v3(vec, data[1]); + mul_v3_fl(vec, u * (1 - v)); add_v3_v3(res, vec); + copy_v3_v3(vec, data[2]); + mul_v3_fl(vec, u * v); add_v3_v3(res, vec); + copy_v3_v3(vec, data[3]); + mul_v3_fl(vec, (1 - u) * v); add_v3_v3(res, vec); +} + +void interp_barycentric_tri_v3(float data[3][3], float u, float v, float res[3]) +{ + float vec[3]; + + copy_v3_v3(res, data[0]); + mul_v3_fl(res, u); + copy_v3_v3(vec, data[1]); + mul_v3_fl(vec, v); add_v3_v3(res, vec); + copy_v3_v3(vec, data[2]); + mul_v3_fl(vec, 1.0f - u - v); add_v3_v3(res, vec); +} + /***************************** View & Projection *****************************/ void orthographic_m4(float matrix[][4], const float left, const float right, const float bottom, const float top, |