JackyJhones

I'm so sorry for no respose during last weeks . I just trapped in my work, which is a typical geophysics project including data collection and signal processing and imaing, and all the software needed programed by my self. Thanks again for u help to created a greatful 3-D image. My 3-D works are the typical imaging of data such as X-Y-Z-Value, not the usual geometrics imaging. If u have such kind of issuses, I will try even though my code does not looks beatiful.

And about the matric mat u want me looked up, I just changed the code in other way: TransposeMatrix(mat); for I := 0 to tbProjectionN.Position - 1 do begin vt.X=1; vt.Y:=1; vt.Z:=Z; vxl:=VectorTransform(vt,mat); gl.Vertex3f(vxl.x, vxl.y, vxl.z); {..vt:-1,1,z ...vt:-1,-1,z ...vt:1,-1,z } end; Same result as u code. That's test told me, each iteration just create an quard which four corners just mathec the 3-d texture x-y plane corners, range is (-1,1).

So happy when received u messages on the morning . There are two question confused me 1. To Apply texture in openGL, there always two line: glTexCoord(s,t,r); glVertex3f(x,y,z); But in your demo code, there only one line gl.Vertex3f(x,y,z); So whats the magic? The demo seems can only show the volume in the range(-0.5,0,5) at each xyz. But in my scene, the world object is x(-5,5),y(-5,5),z(0,3). whatever i do scale, it doesnot work. Bytheway, I have created volume 3-D texture by my data and show it...

Learned more from your demo code. Another question: where is the code to set the vertex texture coordinates ?

Thanks a lot , just occupied by work days.

As title, the target effect like the attachment. I do not find the example in GLScene.