tei/MapLibreParticleLab
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Ensure correct spin direction

Browse Source 
Ported mapbox/mapbox-gl-js#821 as well as `util.wrap()` from mapbox-gl-js.

Fixes #1199.
This commit is contained in:
Minh Nguyễn
2015-04-18 22:14:39 -07:00
parent f80238577c
commit 8b44cfeb76
2 changed files with 22 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/mbgl/map/transform.cpp
View File

@@ -12,6 +12,21 @@
using namespace mbgl;
/** Converts the given angle (in radians) to be numerically close to the anchor angle, allowing it to be interpolated properly without sudden jumps. */
static double _normalizeAngle(double angle, double anchorAngle)
{
angle = util::wrap(angle, -M_PI, M_PI);
double diff = std::abs(angle - anchorAngle);
if (std::abs(angle - util::M2PI - anchorAngle) < diff) {
angle -= util::M2PI;
}
if (std::abs(angle + util::M2PI - anchorAngle) < diff) {
angle += util::M2PI;
}
return angle;
}
Transform::Transform(View &view_)
: view(view_)
{
@@ -330,12 +345,7 @@ void Transform::_setAngle(double new_angle, const Duration duration) {
MapChangeRegionWillChangeAnimated :
MapChangeRegionWillChange);
while (new_angle > M_PI)
new_angle -= util::M2PI;
while (new_angle <= -M_PI)
new_angle += util::M2PI;
final.angle = new_angle;
final.angle = _normalizeAngle(new_angle, current.angle);
if (duration == Duration::zero()) {
current.angle = final.angle;