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大致对了，但由于射线是单向的，所以还需要支持向反方向移动

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hyzboy
2025-08-04 01:32:51 +08:00
parent ed3a4a2eea
commit 65bff60f17
1 changed files with 16 additions and 9 deletions
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25
example/Gizmo/Gizmo3DMove.cpp
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@@ -63,6 +63,7 @@ namespace
int PickAXIS=-1; //拾取轴 int PickAXIS=-1; //拾取轴
float PickDist=0; //拾取辆距离轴心的距离 float PickDist=0; //拾取辆距离轴心的距离
float PickCenterPPU=0; //拾取时的中心点相对屏幕空间象素的缩放比
Matrix4f PickL2W; //拾取时的变换矩阵 Matrix4f PickL2W; //拾取时的变换矩阵
Vector3f PickCenter; //拾取时的中心位置 Vector3f PickCenter; //拾取时的中心位置
@@ -271,8 +272,13 @@ namespace
PickCenter, // 线段起点 PickCenter, // 线段起点
end); // 线段终点 end); // 线段终点
CurDist=glm::length(p_ls-PickCenter); //计算线段上的点与原点的距离 const float cur_ppu=cc->GetPixelPerUnit(p_ls); //求线段上的点相对屏幕空间象素的缩放比
CurTranslate->SetOffset(axis_vector*(CurDist-PickDist)); //设置偏移量
CurDist=glm::length(p_ls-PickCenter);
const float offset=(CurDist/PickCenterPPU)-(PickDist/PickCenterPPU); //计算线段上的点与原点的距离
CurTranslate->SetOffset(axis_vector*offset); //设置偏移量
std::cout<<"PickDist: "<<PickDist<<std::endl; std::cout<<"PickDist: "<<PickDist<<std::endl;
std::cout<<"CurDist : "<<CurDist<<std::endl; std::cout<<"CurDist : "<<CurDist<<std::endl;
@@ -294,19 +300,18 @@ namespace
cc->SetMouseRay(&MouseRay,mouse_coord); cc->SetMouseRay(&MouseRay,mouse_coord);
Matrix4f l2w=GetLocalToWorldMatrix(); const CameraInfo *ci=cc->GetCameraInfo();
Vector3f center=TransformPosition(l2w,Vector3f(0,0,0)); const Matrix4f l2w=GetLocalToWorldMatrix();
const Vector3f center=TransformPosition(l2w,Vector3f(0,0,0));
const float center_ppu=cc->GetPixelPerUnit(center); //求原点坐标相对屏幕空间象素的缩放比
Vector3f axis_vector; Vector3f axis_vector;
Vector3f start; Vector3f start;
Vector3f end; Vector3f end;
Vector3f p_ray,p_ls; Vector3f p_ray,p_ls;
float dist; float dist;
float pixel_per_unit; float pixel_per_unit;
float center_ppu;
MaterialInstance *mi; MaterialInstance *mi;
center_ppu=cc->GetPixelPerUnit(center); //求原点坐标相对屏幕空间象素的缩放比
CurAXIS=-1; CurAXIS=-1;
for(int i=0;i<3;i++) for(int i=0;i<3;i++)
@@ -314,7 +319,7 @@ namespace
axis_vector=GetAxisVector(AXIS(i)); //取得轴向量 axis_vector=GetAxisVector(AXIS(i)); //取得轴向量
start =TransformPosition(l2w,axis_vector*center_ppu* GIZMO_CENTER_SPHERE_RADIUS); //将轴的起点转换到世界坐标 start =TransformPosition(l2w,axis_vector*center_ppu* GIZMO_CENTER_SPHERE_RADIUS); //将轴的起点转换到世界坐标
end =TransformPosition(l2w,axis_vector*center_ppu*(GIZMO_CENTER_SPHERE_RADIUS+GIZMO_CONE_LENGTH+GIZMO_CYLINDER_HALF_LENGTH)); end =TransformPosition(l2w,axis_vector*std::abs(ci->zfar-ci->znear));
//求射线与线段的最近点 //求射线与线段的最近点
MouseRay.ClosestPoint( p_ray, //射线上的点 MouseRay.ClosestPoint( p_ray, //射线上的点
@@ -331,7 +336,9 @@ namespace
mi=pick_mi; mi=pick_mi;
CurAXIS=i; CurAXIS=i;
CurDist=glm::length(p_ls-start); //计算线段上的点与原点的距离 CurDist=glm::length(p_ls-center)/center_ppu; //计算线段上的点与原点的距离
PickCenterPPU=center_ppu;
} }
else else
{ {