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为方便计算，y轴改为指向北极方向。

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This commit is contained in:
tengge1 2019-04-06 20:15:34 +08:00
parent 9439fcb423
commit 610ce10242
3 changed files with 10 additions and 7 deletions
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2
ShadowEditor.Web/src/gis/Globe.js
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@ -23,8 +23,6 @@ function Globe(camera, renderer, options) {
this.lat = 0;
this.alt = MathUtils.zoomToAlt(0);
this.rotation.x = - Math.PI / 2;
this.updateMatrix();
this.matrixAutoUpdate = false;
this.layer = new BingTiledLayer();

4
ShadowEditor.Web/src/gis/render/shader/tiled_vertex.glsl
View File

@ -47,8 +47,8 @@ void main() {
vec3 transformed = vec3(
EARTH_RADIUS * cos(lat) * cos(lon),
EARTH_RADIUS * cos(lat) * sin(lon),
EARTH_RADIUS * sin(lat)
EARTH_RADIUS * sin(lat),
-EARTH_RADIUS * cos(lat) * sin(lon)
);
gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4(transformed, 1.0);

11
ShadowEditor.Web/src/gis/utils/MathUtils.js
View File

@ -7,6 +7,11 @@ const MAX_PROJECTED_COORD = 20037508.3427892; // 墨卡托最大投影坐标（
/**
* 经纬度、海拔转笛卡尔坐标
* 坐标系：
* 原点：地心
* x轴：经度0，纬度0
* y轴：指向北极
* z轴：西经90，纬度0
* @param {THREE.Vector3} lonlat 经纬度（弧度）、海拔
* @param {THREE.Vector3} xyz 笛卡尔坐标
*/
@ -21,8 +26,8 @@ function _lonlatToXYZ(lonlat, xyz) {
return xyz.set(
r * Math.cos(lat) * Math.cos(lon),
r * Math.cos(lat) * Math.sin(lon),
r * Math.sin(lat),
-r * Math.cos(lat) * Math.sin(lon),
);
}
@ -51,8 +56,8 @@ function lonlatToXYZ(lonlat, xyz) {
* @param {THREE.Vector3} lonlat 经纬度（弧度）、海拔
*/
function _xyzToLonlat(xyz, lonlat) {
var lon = Math.atan(xyz.y / Math.sqrt(xyz.x ** 2 + xyz.y ** 2));
var lat = Math.atan(xyz.z / Math.sqrt(xyz.x ** 2 + xyz.y ** 2));
var lon = Math.acos(xyz.x / Math.sqrt(xyz.x ** 2 + xyz.z ** 2));
var lat = Math.atan(xyz.y / Math.sqrt(xyz.x ** 2 + xyz.z ** 2));
var alt = Math.sqrt(xyz.x ** 2 + xyz.y ** 2 + xyz.z ** 2) - WGS84.a;
if (lonlat === undefined) {