Mike; Thanks for the suggestion. While performance is not an issue right now it will become a major factor for the final software!!
Another thought would be the possibility of modifying the color of each grid cell to take account of the visibility information, rather than applying a surface texture. Would this work, and if so would it offer better performance? Fraser On Wed, 2004-09-29 at 13:08, Mike Pilone wrote: > One option is to use a texture that is larger than you need and just crop it > using texture coordinates. Remember that your texture does not need to > exactly fit your shape, but you can let the texture coordinates go from 0 to > .75 for example. > > However in this case you would need a 1024x1024 texture, which is rather > large and will probably not perform well on most video cards. A general rule > of thumb is to keep the texture size to 256x256, but if performance isn't a > big concern right now, give it a try. > > -mike > > > -----Original Message----- > From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED] > On Behalf Of Fraser MacLeod > Sent: Wednesday, September 29, 2004 6:31 AM > To: [EMAIL PROTECTED] > Subject: [JAVA3D] Applying texture to terrain > > Hi; > > I am using a DEM file to generate a virtual terrain (650x1000 grid cells in > the terrain). Using this I am computing those areas of the terrain visible > from a point and storing this as an array (1=visible, 0=non visible for each > grid cell). > > I would like to overlay the visiblility information as a texture onto the > terrain - the effect that I want is one where red tinged cells are visible, > and dark tinged cells are non-visible. > > I am struggling to find a way of doing this given that the > terrain/visibility arrays are not powers of 2. Is there something like an > ELevationGridGenerator for textures? > > Any suggestions more than welcome. > > TIA > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff JAVA3D-INTEREST". For general help, send email to > [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
