Fabio/aves_panorama
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Fixed isFinite exception

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This commit is contained in:
Mark Hu 2020-12-29 14:00:40 +08:00
parent ff4f6ae432
commit 4e9df517ff
1 changed files with 15 additions and 17 deletions
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32
lib/panorama.dart
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@ -263,26 +263,21 @@ class _PanoramaState extends State<Panorama> with SingleTickerProviderStateMixin
} }
Vector3 positionFromLatLon(double lat, double lon) { Vector3 positionFromLatLon(double lat, double lon) {
if (scene != null) { // generate a transform matrix
// generate a transform matrix final Matrix4 m = scene.camera.projectionMatrix * scene.camera.lookAtMatrix * matrixFromLatLon(lat, lon);
final Matrix4 m = scene.camera.projectionMatrix * scene.camera.lookAtMatrix * matrixFromLatLon(lat, lon); // apply transform
// apply transform final Vector4 v = Vector4(0.0, 0.0, -_radius, 1.0)..applyMatrix4(m);
final Vector4 v = Vector4(0.0, 0.0, -_radius, 1.0)..applyMatrix4(m); // transform homogeneous coordinates to NDC and remaps to the viewport
// transform homogeneous coordinates to NDC and remaps to the viewport return Vector3(
if (v.z >= 0.0) (1.0 + v.x / v.w) * scene.camera.viewportWidth / 2,
return Vector3( (1.0 - v.y / v.w) * scene.camera.viewportHeight / 2,
(1.0 + v.x / v.w) * scene.camera.viewportWidth / 2, v.z,
(1.0 - v.y / v.w) * scene.camera.viewportHeight / 2, );
v.z,
);
}
// make it invisible if not ready or hotspot is behind the camera
return Vector3.all(double.maxFinite);
} }
Widget buildHotspotWidgets(List<Hotspot> hotspots) { Widget buildHotspotWidgets(List<Hotspot> hotspots) {
final List<Widget> widgets = List<Widget>(); final List<Widget> widgets = List<Widget>();
if (hotspots != null) { if (hotspots != null && scene != null) {
for (Hotspot hotspot in hotspots) { for (Hotspot hotspot in hotspots) {
final Vector3 pos = positionFromLatLon(hotspot.latitude, hotspot.longitude); final Vector3 pos = positionFromLatLon(hotspot.latitude, hotspot.longitude);
final Offset orgin = Offset(hotspot.width * hotspot.orgin.dx, hotspot.height * hotspot.orgin.dy); final Offset orgin = Offset(hotspot.width * hotspot.orgin.dx, hotspot.height * hotspot.orgin.dy);
@ -295,7 +290,10 @@ class _PanoramaState extends State<Panorama> with SingleTickerProviderStateMixin
child: Transform( child: Transform(
origin: orgin, origin: orgin,
transform: transform..invert(), transform: transform..invert(),
child: hotspot.widget, child: Offstage(
offstage: pos.z < 0,
child: hotspot.widget,
),
), ),
); );
widgets.add(child); widgets.add(child);