Rhino C++ API
8.14
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#include <rhinoSdkPick.h>
Public Types | |
enum | { no_pick = 0, point_pick = 1, window_pick = 2, crossing_pick = 3 } |
three styles of picking More... | |
enum | { wireframe_pick = 1, shaded_pick = 2 } |
picking can happen in wireframe or shaded display mode More... | |
Public Member Functions | |
CRhinoPickContext () | |
bool | IsAcceptableCandidate (const class CRhinoObject *object, bool bIgnoreSelectionState=false, bool bIgnoreLocking=false, bool bIgnoreVisibility=false) const |
bool | PickBezier (const ON_BezierCurve &bezier_curve, double *t, double *depth, double *dist) const |
bool | PickBox (const ON_BoundingBox &bbox, bool *bBoxInsidePickFrustum=0) const |
bool | PickLight (const ON_Light &light, ON_3dPoint &hit_point, double *depth, double *dist) const |
bool | PickLine (const ON_Line &line, double *t, double *depth, double *dist) const |
bool | PickMesh (const ON_Mesh *mesh, const struct CRhinoPickContext_MeshEdgeInfo *edge_info, int pick_style, ON_3dPoint *hit_point, ON_2dPoint *hit_srf_uv, ON_2dPoint *hit_tex_st, double *depth, double *dist, int *vef_flag, int *vef_index) const |
bool | PickMesh (const ON_Mesh *mesh, int pick_style, ON_3dPoint *hit_point, ON_2dPoint *hit_srf_uv, ON_2dPoint *hit_tex_st, double *depth, double *dist, int *vef_flag, int *vef_index) const |
bool | PickNurbsCurve (const ON_NurbsCurve &nurbs_curve, double *t, double *depth, double *dist) const |
bool | PickPoint (const ON_3dPoint &point, double *depth, double *dist) const |
bool | PickPointCloud (int point_count, const ON_3dPoint *points, int *point_index, double *depth, double *dist) const |
bool | PickSegment (const ON_3dPoint points[2], const ON_3dPoint clip_points[2], const unsigned int clip_flags[2], ON_PickPoint &pick_point) const |
bool | PickSegment (const ON_3dPoint points[2], const ON_4dPoint clip_points[2], const unsigned int clip_flags[2], ON_PickPoint &pick_point) const |
unsigned int | PickSubD (ON_SubDMeshFragmentIterator subd_frit, const class CRhinoSubDPickSettings &subd_pick_settings, ON_SimpleArray< ON_SubDComponentPoint > &component_points) const |
unsigned int | PickSubDControlNet (const class ON_SubDRef subd_ref, const class CRhinoSubDPickSettings &subd_pick_settings, ON_SimpleArray< ON_SubDComponentPoint > &component_points) const |
unsigned int | PickSubDMeshFragment (ON_SubDComponentLocation subd_appearance, const class ON_SubDMeshFragment &subd_surface_mesh_fragment, const class CRhinoSubDPickSettings &subd_pick_settings, ON_SubDComponentPoint component_points[9]) const |
bool | PickTriangle (const ON_3dPoint points[3], const ON_3dPoint clip_points[3], const unsigned int clip_flags[3], ON_PickPoint &pick_point) const |
bool | PickTriangle (const ON_3dPoint points[3], const ON_4dPoint clip_points[3], const unsigned int clip_flags[3], ON_PickPoint &pick_point) const |
ON_PickType | PickType () const |
bool | SubDEdgeIsInsideWindowPick (ON_SubDComponentLocation subd_appearance, const class ON_SubDEdge *edge, const class ON_SubDMeshFragment &subd_surface_mesh_fragment) const |
bool | SubDFaceIsInsideWindowPick (ON_SubDComponentLocation subd_appearance, bool bWireframePick, const class ON_SubDFace *face, const class ON_SubDMeshFragment &subd_surface_mesh_fragment) const |
void | UpdateClippingPlanes () |
void | UpdateClippingPlanes (const ON_UuidList *filter) |
Public Attributes | |
bool | m_bModelXformIsIdentity = true |
True if the m_model_xform is the identity. More... | |
bool | m_bPickGroups = false |
true if CRhinoGroupObjects should be added to pick list More... | |
bool | m_bSetClippingPlanes = true |
bool | m_bSkipSelected = true |
these flags are used in pre and post pick More... | |
bool | m_bSkipUnselected = false |
bool | m_bSubSelect = false |
true if the user activated subobject selection More... | |
const class CRhinoGetObject * | m_go = nullptr |
in pre-pick, m_go is NULL More... | |
ON_Xform | m_model_xform |
double | m_model_xform_det = 1.0 |
determinant of m_model_xform More... | |
ON_Line | m_pick_line |
pick chord starts on near clipping plane and ends on far clipping plane More... | |
enum CRhinoPickContext:: { ... } | m_pick_mode = wireframe_pick |
picking can happen in wireframe or shaded display mode More... | |
ON_ClippingRegion | m_pick_region |
enum CRhinoPickContext:: { ... } | m_pick_style = point_pick |
three styles of picking More... | |
class CRhinoView * | m_view = nullptr |
anonymous enum |
CRhinoPickContext::CRhinoPickContext | ( | ) |
bool CRhinoPickContext::IsAcceptableCandidate | ( | const class CRhinoObject * | object, |
bool | bIgnoreSelectionState = false , |
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bool | bIgnoreLocking = false , |
||
bool | bIgnoreVisibility = false |
||
) | const |
Description: Tests an object to see if it is an acceptable candidate for being selected. This test is fast and completely answers all status questions. If IsAcceptableCandidate() returns true, then the only thing left to test is intersecting the pick frustrum with the object. Parameters: object - [on] object to test bIgnoreSelectionState - [in] if true, current selection state is ignored. If false (default), then selected objects are NOT acceptable. bIgnoreLocking - [in] If true, locked objects and objects on locked layers are acceptable. If false (default), then locked objects and objects on locked layers are not acceptable. bIgnoreVisibility - [in] If true, hidden objects and objects on hidden layers are acceptable. If false (default), then hidden objects and objects on hidden layers are not acceptable.
Returns: Returns true if object is an acceptable candidate for being selected
bool CRhinoPickContext::PickBezier | ( | const ON_BezierCurve & | bezier_curve, |
double * | t, | ||
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking bezier curves Parameters: bezier_curve - [in] t - [out] line parameter returned here for point picks depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickBox | ( | const ON_BoundingBox & | bbox, |
bool * | bBoxInsidePickFrustum = 0 |
||
) | const |
Description: Fast test to check if a bounding box intersects a pick frustum. Parameters: bbox - [in] bounding box bBoxInsidePickFrustum - [out] if not NULL, then *bBoxInsidePickFrustum is set to true if the box is completely contained in the pick frustum.
When doing a window or crossing pick, you can immediately return a hit if the object's bounding box is completely inside of the pick frustum. Returns: False if bbox is invalid or box does not intersect the pick frustum
bool CRhinoPickContext::PickLight | ( | const ON_Light & | light, |
ON_3dPoint & | hit_point, | ||
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking meshes Parameters: light - [in] hit_point - [out] location returned here for point picks depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickLine | ( | const ON_Line & | line, |
double * | t, | ||
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking 3d line Parameters: line - [in] t - [out] line parameter returned here for point picks depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickMesh | ( | const ON_Mesh * | mesh, |
const struct CRhinoPickContext_MeshEdgeInfo * | edge_info, | ||
int | pick_style, | ||
ON_3dPoint * | hit_point, | ||
ON_2dPoint * | hit_srf_uv, | ||
ON_2dPoint * | hit_tex_st, | ||
double * | depth, | ||
double * | dist, | ||
int * | vef_flag, | ||
int * | vef_index | ||
) | const |
bool CRhinoPickContext::PickMesh | ( | const ON_Mesh * | mesh, |
int | pick_style, | ||
ON_3dPoint * | hit_point, | ||
ON_2dPoint * | hit_srf_uv, | ||
ON_2dPoint * | hit_tex_st, | ||
double * | depth, | ||
double * | dist, | ||
int * | vef_flag, | ||
int * | vef_index | ||
) | const |
Description: Utility for picking meshes Parameters: mesh - [in] edge_info - [in] (can be null) If not null, edge_info for wireframe picking. This parameter is not used when pick_style != 0 pick_style - [in] 0 = wireframe picking (checks for vertex and edge hits) If the mesh edge list from ON_Mesh::GetMeshEdgeList() is available, then pass it in. 1 = shaded mode picking (checks for face hits) 2 = vertex only picking (returns false if no vertices are hit)
mesh_edge_count - [in] Number of edges in mesh_edge_list[]. mesh_edge_stride - [in] The mesh.m_V[] indices of the i-th mesh edge are vi0 = mesh_edge_list[i*mesh_edge_stride] and vi1 = mesh_edge_list[i*mesh_edge_stride+1] and mesh_edge_list - [in] optional list of mesh edges from ON_Mesh::GetEdgeList(). If this information is available, pass it in.
hit_point - [out] location returned here for point picks hit_srf_uv - [out] if not NULL and the mesh has surface parameters, hit_uv is set to the surface parameters of the hit point. hit_tex_st - [out] if not NULL and the mesh has texture coordinates, hit_st is set to the texture coordinate of the hit point. Note that the texture coordinates can be set in many different ways and this information is useless unless you know how the texture coordinates are set on this particular mesh.
depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point
vef_flag - [out] (for point picks) 0 = vertex hit, 1 = edge hit, 2 = face hit vef_index - [out] (for point picks) index of vertex/edge/face that was hit Returns: true if there is a hit.
bool CRhinoPickContext::PickNurbsCurve | ( | const ON_NurbsCurve & | nurbs_curve, |
double * | t, | ||
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking NURBS curves Parameters: nurbs_curve - [in] t - [out] line parameter returned here for point picks depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickPoint | ( | const ON_3dPoint & | point, |
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking 3d point Parameters: point - [in] depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickPointCloud | ( | int | point_count, |
const ON_3dPoint * | points, | ||
int * | point_index, | ||
double * | depth, | ||
double * | dist | ||
) | const |
Description: Utility for picking 3d point clouds Parameters: point_count - [in] points - [in] point_index [out] zero based index returned here for point picks depth - [out] depth returned here for point picks LARGER values are NEARER to the camera. SMALLER values are FARTHER from the camera. dist - [out] planar distance returned here for point picks. SMALLER values are CLOSER to the pick point Returns: true if there is a hit.
bool CRhinoPickContext::PickSegment | ( | const ON_3dPoint | points[2], |
const ON_3dPoint | clip_points[2], | ||
const unsigned int | clip_flags[2], | ||
ON_PickPoint & | pick_point | ||
) | const |
Description: Pick a segment.
Parameters: points - [in] ends of the segment.
clip_points - [in] The clip_points[] and clipflags[] parameters can be nullptr, in which case the information will be locally calculated in the function. When a large number of segments that share end points are being tested, it is more efficient to calculate the clip_pionts[] and clip_flags[] information once per point location, provided storage and access is well managed. Use CRhinoPickContext.m_pick_region.TrasnformPoint() to calculate the correct values for clip_points[] and clip_flags[].
Both versions of PickSegment() return the same true/false result and calculate the same values for pick_point.m_point, pick_point.m_depth and pick_point.m_distance. If the pick projection is from a parallel (orthographic) view, then both versions calculate the same value for pick_point.m_t[0] parameter. If the pick projection is from a perspective view, then the version of the function that takes ON_4dPoints will calculated the pick_point.m_t[0] parameter more accurately, assuming the ON_4dPoints are properly calculated from the projection matrix.
clip_flags - [in] The clip_points[] and clipflags[] parameters can be nullptr, in which case the information will be locally calculated in the function. When a large number of segments that share end points are being tested, it is more efficient to calculate the clip_pionts[] and clip_flags[] information once per point location, provided storage and access is well managed. Use CRhinoPickContext.m_pick_region.TrasnformPoint() to calculate the correct values for clip_points[] and clip_flags[].
pick_point - [out] Returns: True if the triangle is hit.
bool CRhinoPickContext::PickSegment | ( | const ON_3dPoint | points[2], |
const ON_4dPoint | clip_points[2], | ||
const unsigned int | clip_flags[2], | ||
ON_PickPoint & | pick_point | ||
) | const |
unsigned int CRhinoPickContext::PickSubD | ( | ON_SubDMeshFragmentIterator | subd_frit, |
const class CRhinoSubDPickSettings & | subd_pick_settings, | ||
ON_SimpleArray< ON_SubDComponentPoint > & | component_points | ||
) | const |
Description: Find the best points for a subd selection. The value of subd_frit.SubDAppearance() determines if the surface or control net is inspected. Parameters: subd_frit - [in]
A subd mesh fragment iterator. The value of subd_frit.SubDAppearance() determines if the surface or control net is inspected. subd_pick_settings - [in] component_points - [out] If bReturnSubObjects is false and a point pick is done, then the best pick (vertex, edge or face) is added to component_points[].
If bReturnSubObjects is false and a window or crossing pick is done, then nothing is added to component_points[].
If bReturnSubObjects is true, every subobject that qualifies is added to component_points[]. Returns: 0: nothing selected.
If bReturnSubObjects is false and something was selected, 1 is returned.
If bReturnSubObjects is true, the number of components added to component_points[] is returned.
unsigned int CRhinoPickContext::PickSubDControlNet | ( | const class ON_SubDRef | subd_ref, |
const class CRhinoSubDPickSettings & | subd_pick_settings, | ||
ON_SimpleArray< ON_SubDComponentPoint > & | component_points | ||
) | const |
Description: Find the best points for a subd control net selection. Up to 3 points can be returned, a face point, an edge point and a vertex point. The caller can apply various criteria to determing which point is the best one. Parameters: subd_limit_mesh - [in] level_index - [in] component_point - [out] component_point[0] A point on a vertex or ON_SubDComponentPoint::Unset. component_point[1] A point on an edge or ON_SubDComponentPoint::Unset. component_point[2] A point on a face or ON_SubDComponentPoint::Unset. Returns: true if at least one point is returned.
unsigned int CRhinoPickContext::PickSubDMeshFragment | ( | ON_SubDComponentLocation | subd_appearance, |
const class ON_SubDMeshFragment & | subd_surface_mesh_fragment, | ||
const class CRhinoSubDPickSettings & | subd_pick_settings, | ||
ON_SubDComponentPoint | component_points[9] | ||
) | const |
Description: Pick a triangle. Parameters: subd_appearance - [in] surface or control net subd_surface_mesh_fragment - [in] A surface mesh fragment used to display some part of the face. component_points - [out] The array must have a capacity of 9 components. If component_points[].m_component_ptr.Direction() is not zero, then a window pick involving a partial fragment added an edge/face and additional testing is required to determine if the entire edge/face is inside the widow. Returns: Number of components that were hit. Information about these components is returned in the component_points[] array. If bReturnSubObjects is false and the pick style is a window or crossing, then 1 is returned if the pick hits the fragment and component_points[0] is set, but the contents are meaningless.
bool CRhinoPickContext::PickTriangle | ( | const ON_3dPoint | points[3], |
const ON_3dPoint | clip_points[3], | ||
const unsigned int | clip_flags[3], | ||
ON_PickPoint & | pick_point | ||
) | const |
Description: Pick a triangle.
Parameters: points - [in] corners of the triangle.
clip_points - [in] The clip_points[] and clipflags[] parameters can be nullptr, in which case the information will be locally calculated in the function. When a large number of triangles that share corner points are being tested, it is more efficient to calculate the clip_pionts[] and clip_flags[] information once per point location, provided storage and access is well managed. Use CRhinoPickContext.m_pick_region.TrasnformPoint() to calculate the correct values for clip_points[] and clip_flags[].
Both versions of PickSegment() return the same true/false result and calculate the same values for pick_point.m_point, pick_point.m_depth and pick_point.m_distance. If the pick projection is from a parallel (orthographic) view, then both versions calculate the same value for pick_point.m_t[0] parameter. If the pick projection is from a perspective view, then the version of the function that takes ON_4dPoints will calculated the pick_point.m_t[0] parameter more accurately, assuming the ON_4dPoints are properly calculated from the projection matrix.
clip_flags - [in] The clip_points[] and clipflags[] parameters can be nullptr, in which case the information will be locally calculated in the function. When a large number of triangles that share corner points are being tested, it is more efficient to calculate the clip_pionts[] and clip_flags[] information once per point location, provided storage and access is well managed. Use CRhinoPickContext.m_pick_region.TrasnformPoint() to calculate the correct values for clip_points[] and clip_flags[].
pick_point - [out]
Returns: True if the triangle is hit. Remarks: The value of CRhinoPickContext.m_pick_mode is ignored. The hit point calculation considers the entire triangle.
bool CRhinoPickContext::PickTriangle | ( | const ON_3dPoint | points[3], |
const ON_4dPoint | clip_points[3], | ||
const unsigned int | clip_flags[3], | ||
ON_PickPoint & | pick_point | ||
) | const |
ON_PickType CRhinoPickContext::PickType | ( | ) | const |
Returns: m_pick_style as an ON_PickType.
bool CRhinoPickContext::SubDEdgeIsInsideWindowPick | ( | ON_SubDComponentLocation | subd_appearance, |
const class ON_SubDEdge * | edge, | ||
const class ON_SubDMeshFragment & | subd_surface_mesh_fragment | ||
) | const |
Description: Low level tool to determine perform additional checking to insure a SubD edge is inside a window pick. Parameters: edge - [in] SubD edge to test. subd_surface_mesh_fragment - [in] A surface mesh fragment used to display some part of the face. Returns: True when input information is valid and the entire subd face is inside the window pick. False otherwise.
bool CRhinoPickContext::SubDFaceIsInsideWindowPick | ( | ON_SubDComponentLocation | subd_appearance, |
bool | bWireframePick, | ||
const class ON_SubDFace * | face, | ||
const class ON_SubDMeshFragment & | subd_surface_mesh_fragment | ||
) | const |
Description: Low level tool to determine perform additional checking to insure a SubD face is inside a window pick. Parameters: subd_appearance - [in] surface or control net bWireframePick - [in] True for wireframe pick. False for shaded surface pick. face - [in] SubD face to test. subd_surface_mesh_fragment - [in] A surface mesh fragment used to display some part of the face. Returns: True when input information is valid and the entire subd face is inside the window pick. False otherwise.
void CRhinoPickContext::UpdateClippingPlanes | ( | ) |
Description: Updates the clipping plane information in m_pick_region. The m_bSetClippingPlanes and m_view fields must be before calling UpdateClippingPlanes().
void CRhinoPickContext::UpdateClippingPlanes | ( | const ON_UuidList * | filter | ) |
Description: Updates the clipping plane information in m_pick_region. The m_bSetClippingPlanes and m_view fields must be before calling UpdateClippingPlanes(). Parameters: filter - [in] optional list of UUIDs to pay attention to when updating clipping planes. Only planes with ids in the filter list will be used if filter is not null and contains entries
bool CRhinoPickContext::m_bModelXformIsIdentity = true |
True if the m_model_xform is the identity.
bool CRhinoPickContext::m_bPickGroups = false |
true if CRhinoGroupObjects should be added to pick list
bool CRhinoPickContext::m_bSetClippingPlanes = true |
If m_bSetClippingPlanes is true, then CRhPickContext will use lazy evaluation to automatically set m_pick_region.m_clip_planes[] when m_view is set. If m_bSetClippingPlanes is false, then you have to set m_pick_region.m_clip_planes[] if they are required.
bool CRhinoPickContext::m_bSkipSelected = true |
these flags are used in pre and post pick
bool CRhinoPickContext::m_bSkipUnselected = false |
bool CRhinoPickContext::m_bSubSelect = false |
true if the user activated subobject selection
const class CRhinoGetObject* CRhinoPickContext::m_go = nullptr |
in pre-pick, m_go is NULL
set if picking is in CRhinoGetObject::GetObject()
ON_Xform CRhinoPickContext::m_model_xform |
Sometimes a component of m_pick_xform is due to a model transformation. For example, this happens when component geometry in an instance reference is being picked. The model transformation information is recoreded below. Most objects can ignore this information. However, objects like annotation where arrow heads and text sizes are independent of model transformations need this information.
double CRhinoPickContext::m_model_xform_det = 1.0 |
determinant of m_model_xform
ON_Line CRhinoPickContext::m_pick_line |
pick chord starts on near clipping plane and ends on far clipping plane
enum { ... } CRhinoPickContext::m_pick_mode |
picking can happen in wireframe or shaded display mode
ON_ClippingRegion CRhinoPickContext::m_pick_region |
m_pick_region.m_xform maps world 3d picking frustum into -1<=x,y,z<=+1 clipping coordinate box
enum { ... } CRhinoPickContext::m_pick_style |
three styles of picking
class CRhinoView* CRhinoPickContext::m_view = nullptr |
This m_view can be a model view or a page view. When m_view is a page view, then you need to distinguish between the viewports m_view->MainViewport() and m_view->ActiveViewport(). When m_view is a model view, both m_view->MainViewport() and
m_view->ActiveViewport() return the world view's viewport.