0029388: Visualization - Setting camera eye position to (0,0,0) kills the application

ID	Project	Category	View Status	Date Submitted	Last Update

0029388	Open CASCADE	OCCT:Visualization	public	2017-12-15 11:14	2019-08-15 17:50

Reporter	~~abv~~	Assigned To	bugmaster
Priority	normal	Severity	minor
Status	closed	Resolution	fixed
Product Version	6.8.0
Target Version	7.4.0	Fixed in Version	7.4.0

Summary	0029388: Visualization - Setting camera eye position to (0,0,0) kills the application
Description	Setting camera eye position in 3d viewer to (0,0,0) kills the application. The reason is that "eye" and "center" of the camera are parameters manipulated independently, and center is at (0,0,0) by default. Vector from the eye to the center defines view direction. When eye is set to (0,0,0), this direction becomes indefinite (see Graphic3d_Camera::Direction()). (In debug mode, exception is thown by gp_Dir constructor.) It sounds reasonable storing Direction() within Graphic3d_Camera independently from Center/Eye, so that it remains always valid.
Steps To Reproduce	Setting Eye directly: pload AISV MODELING box b 10 10 10 vdisplay b vviewparams -eye 0 0 0 Eye becomes equals to Center within Fit All due to floating point precision limitations (crashes in Debug mode): pload MODELING VISUALIZATION box b 5.0e+21 1000.0 350.0 vclear vinit View1 vaxo vcamera -persp vdisplay -dispMode 1 b vfit
Tags	No tags attached.

Test case number	Not required

Date Modified	Username	Field	Change
2017-12-15 11:14	~~abv~~	New Issue
2017-12-15 11:14	~~abv~~	Assigned To	=> kgv
2017-12-15 11:37	kgv	Relationship added	related to 0028033
2018-03-25 12:05	kgv	Target Version	7.3.0 => 7.4.0
2018-06-14 17:51	kgv	Relationship added	related to 0029837
2018-06-14 17:56	kgv	Description Updated
2018-06-14 17:56	kgv	Steps to Reproduce Updated
2019-06-26 08:13	kgv	Assigned To	kgv => tizmaylo
2019-06-26 08:13	kgv	Status	new => assigned
2019-08-12 14:31	kgv	Note Added: 0086189
2019-08-12 14:31	kgv	Assigned To	tizmaylo => abv
2019-08-12 14:31	kgv	Status	assigned => resolved
2019-08-12 14:36	~~abv~~	Assigned To	abv => bugmaster
2019-08-12 14:36	~~abv~~	Status	resolved => reviewed
2019-08-12 14:36	~~abv~~	Status	reviewed => verified
2019-08-12 14:36	~~abv~~	Resolution	open => fixed
2019-08-15 17:50	bugmaster	Test case number	=> Not required

related to	0028033	closed	bugmaster	Visualization - Graphic3d_Camera::ZFitAll() throws exception on camera rotation
related to	0029837	closed	bugmaster	Visualization, Graphic3d_Camera - Fit All operation works incorrectly on flat object

kgv 2019-08-12 14:31 developer ~0086189	Proposed change (store direction instead of a point) has been implemented in scope of 0029837, therefore test case will not throw exception.