[SOLVED] Object disappearing in the frustum when I zoom in using Sofa v12.16

Hi Hugo,

Thank you very much for the feedback!
Unfortunately, this bug still exists even when i add the fixed bbox for every MechanicalObject in my scene.
I also tried printing out the znear and zfar values of the InteractiveCamera(p_zNear in the InteractiveCamera.cpp). The result is attached below:
https://www.dropbox.com/s/bldlnfy4800h1ha/error_znear.gif?dl=0

It seems like the znear and zfar value keep increasing from the start of the animation. The above video shows that value increasing when i just moves the mouse.

–Ruiliang

Hi Hugo,

Thanks a lot!
I have noticed that there are some invisible objects flying in the scene that influences the BBox and zNear.
I have attached the screenshot below: In this scene, i am dragging an invisible point using the mouse. If i release the mouse, the invisible object will fly away and the minBBox, Znear starts changing. No matter which display flag i check(visual/collision/mechanical/mapping), the invisible object can not be visualized.
https://www.dropbox.com/s/yb4t0csmbs504a7/CutHex.png?dl=0

It happens after i cut the hex mesh. It seems the hex mesh has some points remains after been cut. I wonder if there is something wrong with our hex mesh. I post one of the xml for the hexmesh below. We have “TriangleModel/LineModel/PointModel” for the collision model. What i found is even if i have just “TriangleModel” for the collision, it still has some points remain after cut.

<Node name=”Fatty tissue covering veins”>
            <HexahedronSetTopologyContainer hexahedra=”0 33 …
            <MechanicalObject name=”MO” rotation=”3.527953863143921 -2…
            <HexahedronSetTopologyModifier removeIsolated=”false” />
            <HexahedronSetTopologyAlgorithms template=”Vec3d” />
            <HexahedronSetGeometryAlgorithms template=”Vec3d” />
            <DiagonalMass />
            <HexahedronFEMForceField damping=”0.10000000149011612″ method=”large” poissonRatio=”0.4000000059604645″ rayleighStiffness=”0.10000000149011612″ youngModulus=”3000.0″ />
            <UncoupledConstraintCorrection />
            <Node name=”quad-surface”>
                <QuadSetTopologyContainer name=”Fatty tissue covering veins-quadSurf” />
                <QuadSetGeometryAlgorithms template=”Vec3d” />
                <QuadSetTopologyModifier />
                <QuadSetTopologyAlgorithms template=”Vec3d” />
                <Hexa2QuadTopologicalMapping input=”@../Fatty tissue covering veins-topology” output=”@Fatty tissue covering veins-quadSurf” />
                <OglShader fileFragmentShaders=”…
                <OglFloatVariable name=”TessellationLevel” value=”8″ />
                <OglModel genTex3d=”1″ material=”Default Diffuse 1 0.12459243
                <IdentityMapping input=”@../MO” output=”@Fatty tissue covering veins-visual” />
                <Node name=”triangle-surface”>
                    <TriangleSetTopologyContainer name=”Fatty tissue covering veins-triSurf” />
                    <TriangleSetTopologyModifier />
                    <TriangleSetTopologyAlgorithms template=”Vec3d” />
                    <TriangleSetGeometryAlgorithms template=”Vec3d” />
                    <Quad2TriangleTopologicalMapping input=”@../Fatty tissue covering veins-quadSurf” output=”@Fatty tissue covering veins-triSurf” />
                    <!– <PointModel bothSide=”0″ contactFriction=”500.0″ contactStiffness=”50000000.0″ group=”1″ moving=”1″ selfCollision=”0″ simulated=”1″ /> –>
                    <LineModel bothSide=”0″ active=”0″ contactFriction=”500.0″ contactStiffness=”50000000.0″ group=”1″ moving=”1″ selfCollision=”0″ simulated=”1″ />
                    <TriangleModel bothSide=”0″ contactFriction=”500.0″ contactStiffness=”500.0″ group=”1″ moving=”1″ selfCollision=”0″ simulated=”1″ tags=”HapticSurface” />
                </Node>
            </Node>
        </Node>

Can you help me look at this?
Thanks!

-Ruiliang