From 2bdb0cb0fa267027655c38d86c71206fe2ae90e4 Mon Sep 17 00:00:00 2001
From: Caven Chen <cavencj@gmail.com>
Date: Tue, 17 May 2022 21:31:07 +0800
Subject: [PATCH] imporve the wind layer #96

---
 modules/wind/WindCanvas.js |  5 +++++
 modules/wind/WindLayer.js  | 14 +++++++++++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/modules/wind/WindCanvas.js b/modules/wind/WindCanvas.js
index 862da522..33996fb4 100644
--- a/modules/wind/WindCanvas.js
+++ b/modules/wind/WindCanvas.js
@@ -126,6 +126,11 @@ class WindCanvas {
   _drawPixelParticle(particle, min, max) {
     let pointPrev = [particle.x, particle.y]
     let pointNext = [particle.xt, particle.yt]
+    let dx = particle.xt - particle.x
+    let dy = particle.yt - particle.y
+    if (dx * dx + dy * dy > 20 * 20) {
+      return
+    }
     if (
       pointNext &&
       pointPrev &&
diff --git a/modules/wind/WindLayer.js b/modules/wind/WindLayer.js
index 76f4143e..dd90f3b1 100644
--- a/modules/wind/WindLayer.js
+++ b/modules/wind/WindLayer.js
@@ -117,9 +117,17 @@ class WindLayer extends Layer {
     let camera = this._viewer.camera
     let ellipsoid = Cesium.Ellipsoid.WGS84
     this._delegate.intersectsCoordinate = coordinate => {
-      let occluder = new Cesium.EllipsoidalOccluder(ellipsoid, camera.position)
-      let point = Cesium.Cartesian3.fromDegrees(coordinate[0], coordinate[1])
-      return occluder.isPointVisible(point)
+      if (scene.mode === Cesium.SceneMode.SCENE3D) {
+        let occluder = new Cesium.EllipsoidalOccluder(
+          ellipsoid,
+          camera.position
+        )
+        let point = Cesium.Cartesian3.fromDegrees(coordinate[0], coordinate[1])
+        return occluder.isPointVisible(point)
+      } else if (scene.mode === Cesium.SceneMode.SCENE2D) {
+        return !(coordinate[0] === -180 || coordinate[0] === 180)
+      }
+      return true
     }
 
     this._delegate.project = coordinate => {