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Be explicit about type of angles: either Radians or Degrees.

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Angles are always doubles.
Internally use radians as much as possible.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1605 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2011-01-09 14:49:59 +00:00
parent a59248ae95
commit 53bbcfe9a9
38 changed files with 248 additions and 195 deletions
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src/gfx/rotate_image.cpp
+10 -14
View File
@@ -46,7 +46,7 @@ Image rotate_image_impl(Image img) {
// ----------------------------------------------------------------------------- : Rotations
// Function object to handle rotation
struct Rotate90 {
struct Rotate90deg {
/// Init a rotated image, where the source is w * h pixels
inline static void init(Image& img, UInt w, UInt h) {
img.Create(h, w, false);
@@ -59,7 +59,7 @@ struct Rotate90 {
}
};
struct Rotate180 {
struct Rotate180deg {
inline static void init(Image& img, UInt w, UInt h) {
img.Create(w, h, false);
}
@@ -70,7 +70,7 @@ struct Rotate180 {
}
};
struct Rotate270 {
struct Rotate270deg {
inline static void init(Image& img, UInt w, UInt h) {
img.Create(h, w, false);
}
@@ -83,19 +83,15 @@ struct Rotate270 {
// ----------------------------------------------------------------------------- : Interface
double almost_equal(double x, double y) {
return fabs(x-y) < 1e-6;
}
Image rotate_image(const Image& image, double angle) {
double a = fmod(angle, 360);
if (almost_equal(a, 0)) return image;
if (almost_equal(a, 90)) return rotate_image_impl<Rotate90> (image);
if (almost_equal(a,180)) return rotate_image_impl<Rotate180>(image);
if (almost_equal(a,270)) return rotate_image_impl<Rotate270>(image);
Image rotate_image(const Image& image, Radians angle) {
double a = constrain_radians(angle);
if (is_rad0(a)) return image;
if (is_rad90(a)) return rotate_image_impl<Rotate90deg> (image);
if (is_rad180(a)) return rotate_image_impl<Rotate180deg>(image);
if (is_rad270(a)) return rotate_image_impl<Rotate270deg>(image);
else {
if (!image.HasAlpha()) const_cast<Image&>(image).InitAlpha();
return image.Rotate(angle * M_PI / 180, wxPoint(0,0));
return image.Rotate(angle, wxPoint(0,0));
}
}