Re: [osg-users] how to draw a Curved Surface?

Bean, Sorry, but I'm not a human debugger. It returns false because you are not hitting anything. It is up to you to analyze the parameters passed to the intersector. Usually one would use window coordinates from a pick event however. You are not giving enough information here. Cheers

Re: [osg-users] how to draw a Curved Surface?

Hi Sebastian, I use the way about your method, but I get zero point. I may use wrong. Here is the code: const float x = v1.x(); const float y = v1.y(); const float look_offSet = 10.0f; osg::ref_ptr polyIt = new

Re: [osg-users] how to draw a Curved Surface?

Hi Sebastian, I use the way about your method, but I get zero point. I may use wrong. Here is the code: const float x = v1.x(); const float y = v1.y(); const float look_offSet = 10.0f; osg::ref_ptr polyIt = new

Re: [osg-users] how to draw a Curved Surface?

If your terrain surface uses a GLSL fragment shader, you could add a 2D point in polygon test on the x/y coordinate and add or blend a highlighting color to the generated fragment when it passes the PIP test. It might get kind of slow when your enclosing polygons has a lot of vertices. For a

Re: [osg-users] how to draw a Curved Surface?

Hello Bean? You can use the polytop intersector to get all primitives inside and draw them with an polygon offset applied on top of the original geometry. Cheers Sebastian primitive problem

[osg-users] how to draw a Curved Surface?

primitive problem

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

Hi, thanks for all your replies; use overlaynode,but the projected texture is not right, any ideas?thanks!! attached : yellow lines-profile of geometry Code: geometry-addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::POLYGON,0,v-size())) ; geode-addChild(geometry);

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

Pan Li wrote: I want to draw a curved surface dynamic, like the function Mesure area in skyline. now i have the profile line of the curved surface,but just lines,not a polygon or a surface. Well, the example you showed is using texturing. I suspect if that's the effect you want, you'll

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

Hi Jason, Last time I checked (half a year ago), osggis did no create a curved polygon when creating a filled polygon for e.g. Russia. Since no sampling points are created inside the polygon the tessellated triangles goes straight from one edge to the other thought the ground. It would be

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

No - osggis does not drape polygon geometries. Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : +1.703.652.4791 On Wed, Aug 5, 2009 at 5:45 AM, John Vidar Larring larr...@weatherone.tvwrote: Hi Jason, Last time I checked (half a year ago), osggis did no create a curved polygon

[osg-users] how to draw a Curved Surface on the top of terrain?

Hi, 1、how to draw a Curved Surface on the top of terrain? like the fig1. 2、how to compute the surface area of the Curved Surface? any examples?? thanks a lot!! Cheers, lipan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=15723#15723

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

Hi Lipan, You could look into using projected textures with the osgSim::OverlayNode or if you are rendering vector data such as that from an ESRI shapefile I'd recommend looking at osggis at http://www.osggis.org. Jason On Mon, Aug 3, 2009 at 7:15 AM, Pan Li osg...@163.com wrote: Hi, 1、how

Re: [osg-users] how to draw a Curved Surface on the top of terrain?

Thanks for your reply! I want to draw a curved surface dynamic, like the function Mesure area in skyline. now i have the profile line of the curved surface,but just lines,not a polygon or a surface. my issue is: how to display the profile line to be a enclosed area, not lines. use