ArcGIS Maps SDK for Unity 1.0版本(二)坐标转换等

1 unity 坐标转HPTransform(直角坐标系)
HPTransform坐标反转 ARCGIS 矩阵齐次变换 unity坐标
var worldPosition = math.inverse(arcGISMapComponent.WorldMatrix).HomogeneousTransformPoint(hit.point.ToDouble3());

经纬度转unity 坐标

ArcGISMapComponent arcGISMapComponent =GetComponentInParent<ArcGISMapComponent>();

public Vector3 ArcgisToposition(double Vx, double Vy)
{
var cc= arcGISMapComponent.View.GeographicToWorld(new ArcGISPoint(Vx, Vy, 850));
var worldPosition =(arcGISMapComponent.WorldMatrix).HomogeneousTransformPoint(cc);
return new Vector3((float)worldPosition.x, (float)worldPosition.y, (float)worldPosition.z);
}

2 经纬度 HPTransform(直角坐标系)
ArcGISPoint与double3转换
经纬度 HPTransform
var geoPosition = arcGISMapComponent.View.WorldToGeographic(worldPosition);
HPTransform 经纬度
var = arcGISMapComponent.View.GeographicToWorld

3 HPTransform(直角坐标系)得到double3
hpTransform.UniversePosition

4 经纬度获取高程 https://open-elevation.com/ 先用着

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1矩阵与Quaternion 互转

Matrix4x4.Rotate(Quaternion) 得到矩阵插件中没找到Quaterniond转double4x4

double4x4 .ToQuaterniond()

2相机朝向某方向（感觉还有问题）

p1 目标点 p2 相机点

public Quaternion Camera_LookPosition(ArcGISPoint p1, ArcGISPoint p2)
{
ArcGISPoint p3 = new ArcGISPoint(p1.X, p1.Y, p1.Z);
double3 difference = arcGISMapComponent.View.GeographicToWorld(p3) - arcGISMapComponent.View.GeographicToWorld(p2);
Vector3 dirB = new Vector3((float)difference.x, (float)difference.y, (float)difference.z);

//float3 HPTransformUp = -hpTransform.Forward;

return Quaternion.LookRotation(dirB, HPTransformUp);//HPTransformUp向上的方向向量

//注 unity 坐标 HP坐标 AcrGISLocation 坐标各不相同各个轴也不是一一对应

//float angle = Vector3.Angle(dirA, dirB) * (Vector3.Dot(dirA, dirB) < 0 ? -1 : 1);
//Vector3 CrossV3 = Vector3.Cross(dirA, dirB);
//return Quaternion.AngleAxis(angle, CrossV3) * Rotation;//算不出来
}

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旋转解析

 //相机绕点旋转  ------------高度问题
        void MyRotateAround(ref double3 cartesianPosition, ref quaternion cartesianRotation, double3 center, double3 axis, double angle, int a)
        {
            //Quaternion rot = Quaternion.AngleAxis(angle, axis);
            double3 dir = cartesianPosition - center; //计算从圆心指向摄像头的朝向向量
            if (a == 0)
            {
                //dir= TRS(new double3(0,0,0),)
                // dir向量 绕axis轴 旋转 angle角度   
                dir = My_Rotate(axis, -angle).HomogeneousTransformPoint(dir);
                cartesianPosition = center + dir;
                cartesianRotation = My_Rotate(axis, -angle).ToQuaterniond().ToQuaternion() * cartesianRotation;//区别 前后位置乘的原因                
            }
            else
            {
                dir = My_Rotate(axis, angle).HomogeneousTransformPoint(dir);
                cartesianPosition = center + dir;
                //为保证相机的x轴与地面平行 或 ArcgisRotion 的roll为0  
                var right = Matrix4x4.Rotate(cartesianRotation).GetColumn(0);
                //问题：Matrix4x4.Rotate(hpTransform.UniverseRotation).GetColumn(0);与hpTransform.Right 的使用结果不同

                //Vector3 ceshilinshi = new Vector3((float)axis.x, (float)axis.y, (float)axis.z );
                //1  var rotationX = Quaternion.AngleAxis(-(float)angle, ceshilinshi); //失败  原因：axis的来源不准  由float3 来的本身就不准 多次后偏差拉大

                var rotationX = Quaternion.AngleAxis(-(float)angle, right);            
                cartesianRotation = rotationX * cartesianRotation;

                //var right = Matrix4x4.Rotate(cartesianRotation).GetColumn(0);
                //double3 linshiuge = new double3(right.x, right.y, right.z);
                //var linshi = My_Rotate(linshiuge, angle).ToQuaterniond().ToQuaternion();              
                //cartesianRotation = linshi * cartesianRotation;//两者都一样
            }
        }

0 1 分别是绕旋转点up轴旋转绕自身right轴旋转

感觉没必要分但实际结果绕自身right轴旋转会逐渐产生偏差根源是传入的right轴不准确

结果：
Matrix4x4.Rotate(hpTransform.UniverseRotation).GetColumn(0);

与hpTransform.Right

的使用结果不同

ArcGIS Maps SDK for Unity 1.0版本(二)坐标转换等

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