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pull_spot()

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This commit is contained in:
David Rose 2013-06-06 02:05:35 +00:00
parent a3027ceb23
commit c277d802a0
2 changed files with 40 additions and 0 deletions
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37
panda/src/pnmimage/pfmFile.cxx
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@ -1529,6 +1529,43 @@ clear_to_texcoords(int x_size, int y_size) {
}
}
////////////////////////////////////////////////////////////////////
// Function: PfmFile::pull_spot
// Access: Published
// Description: Applies delta * t to the point values within radius
// distance of (xc, yc). The t value is scaled from 1.0
// at the center to 0.0 at radius, and this scale
// follows the specified exponent. Returns the number
// of points affected.
////////////////////////////////////////////////////////////////////
int PfmFile::
pull_spot(const LPoint4f &delta, double xc, double yc,
double radius, double exponent) {
int minx = max((int)cceil(xc - radius), 0);
int maxx = min((int)cfloor(xc + radius), _x_size - 1);
int miny = max((int)cceil(yc - radius), 0);
int maxy = min((int)cfloor(yc + radius), _y_size - 1);
int count = 0;
for (int yi = miny; yi <= maxy; ++yi) {
for (int xi = minx; xi <= maxx; ++xi) {
double r2 = (xi - xc) * (xi - xc) + (yi - yc) * (yi - yc);
if (r2 >= 1.0) {
continue;
}
PN_float32 t = (PN_float32)pow(1.0 - sqrt(r2), exponent);
PN_float32 *f = &_table[(yi * _x_size + xi) * _num_channels];
for (int ci = 0; ci < _num_channels; ++ci) {
f[ci] += delta[ci] * t;
}
++count;
}
}
return count;
}
////////////////////////////////////////////////////////////////////
// Function: PfmFile::calc_tight_bounds
// Access: Published

3
panda/src/pnmimage/pfmFile.h
View File

@ -124,6 +124,9 @@ PUBLISHED:
BLOCKING void apply_crop(int x_begin, int x_end, int y_begin, int y_end);
BLOCKING void clear_to_texcoords(int x_size, int y_size);
BLOCKING int pull_spot(const LPoint4f &delta, double xc, double yc,
double radius, double exponent);
bool calc_tight_bounds(LPoint3f &min_point, LPoint3f &max_point) const;
BLOCKING PT(BoundingHexahedron) compute_planar_bounds(const LPoint2f &center, PN_float32 point_dist, PN_float32 sample_radius, bool points_only) const;
INLINE BLOCKING PT(BoundingHexahedron) compute_planar_bounds(const LPoint2d &center, PN_float32 point_dist, PN_float32 sample_radius, bool points_only) const;