Lerking/gtk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

GskTransform: Normalize angles

Browse Source 
Make sure all angles are in the [0..365) range
This commit is contained in:
Timm Bäder
2019-12-19 12:29:33 +01:00
parent 4788f88840
commit e62f135c6a
1 changed files with 18 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
gsk/gsktransform.c
View File

@@ -785,6 +785,22 @@ static const GskTransformClass GSK_ROTATE_TRANSFORM_CLASS =
gsk_rotate_transform_equal,
};
static inline float
normalize_angle (float angle)
{
float f;
if (angle >= 0 && angle < 360)
return angle;
f = angle - (360 * ((int)(angle / 360.0)));
if (f < 0)
f = 360 + f;
return f;
}
/**
* gsk_transform_rotate:
* @next: (allow-none) (transfer full): the next transform
@@ -815,7 +831,7 @@ gsk_transform_rotate (GskTransform *next,
GSK_TRANSFORM_CATEGORY_2D,
next);
result->angle = angle;
result->angle = normalize_angle (angle);
return &result->parent;
}
@@ -938,7 +954,7 @@ gsk_transform_rotate_3d (GskTransform *next,
GSK_TRANSFORM_CATEGORY_3D,
next);
result->angle = angle;
result->angle = normalize_angle (angle);
graphene_vec3_init_from_vec3 (&result->axis, axis);
return &result->parent;