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app: Fix direction in path stroking

This commit is contained in:
Alexia Death 2010-07-08 20:31:03 +03:00
parent e23e99e2ab
commit 7609e3d887
1 changed files with 15 additions and 16 deletions
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31
app/paint/gimppaintcore-stroke.c
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@ -376,38 +376,37 @@ gimp_paint_core_stroke_emulate_dynamics (GimpCoords *coords,
}
}
if (length > 0)
if (length > 1)
{
gint i;
gdouble delta_x;
gdouble delta_y;
/* Fill in direction */
for (i = 2; i < length; i++)
for (i = 1; i < length; i++)
{
gdouble delta_x = coords[i - 1].x - coords[i].x;
gdouble delta_y = coords[i - 1].y - coords[i].y;
delta_x = coords[i - 1].x - coords[i].x;
delta_y = coords[i - 1].y - coords[i].y;
if (delta_x == 0)
if ((delta_x == 0) && (delta_y == 0))
{
coords[i].direction = coords[i - 1].direction;
}
else
{
coords[i].direction = 1.0 - atan (delta_y / delta_x) / (2 * G_PI);
if (delta_x > 0.0)
coords[i].direction = coords[i].direction + 0.5;
coords[i].direction = atan (delta_y / delta_x) / (2 * G_PI);
if (coords[i].direction < 0)
coords[i].direction += 1.0;
coords[i].direction = 1.0 - coords[i].direction;
}
/* This should avoid confusing the interpolator on sharp
* turns where the angle warps
*/
if (fabs (coords[i].direction - coords[i - 1].direction) > 0.5)
coords[i].direction = coords[i].direction + 1.0;
}
if (length > 2)
if (length > 1)
{
coords[0].direction = coords[2].direction;
coords[1].direction = coords[2].direction;
coords[0].direction = coords[1].direction;
}
}
}