transp


transparency

transp
brush
image
secx
secy
texture
vertex
vol
See also

transp

transp

       Returns the transp value.

transp(t)

       Changes this value.
Notes:
1) t=1: transparency varies from 0 (transparent) to 1 (opaque): by default.
2) t=0: transparency varies from 0 (opaque) to 1 (transparent).
3) yes transp must be activated.

transp image

transp image(id)

        Returns the alpha layer of the image id, equivalent to image(id)format("A").
Options:
average: returns the average of the alpha layer of the image id.

transp image(id)=t

        Changes the alpha layer of the image id by creating a transparency from 0 (totaly transparent) to 1 (totaly opaque) according to options. Equivalent to image(id)format("A")=T, with:
T=calloc(nx*ny,t); nx and ny are the image dimensions.
Options:
transp image(id)center(x,y)=t1,t2: transparency from t1 (point x,y) to t2 (edge).
cut(t0): does not modify pixels whose alpha is t0.
below: transparency from 0 to t on the upper half of the image.
above: transparency from 0 to t on the lower half of the image.
right: transparency from 0 to t on the right half of the image.
left: transparency from 0 to t on the left half of the image.
normal: the center coordinates are normalized between 0.0 and 1.0.
Example:
transp image(1)cut(0)=t; changes the transparency of pixels which are not completly transparent, this allows for example to change the transparency of an image after extraction by image(1,2)poi(x,y)line(Ligne).
Notes:
1) yes transp must be activated.
2) t=0: total transparency (default), t=1: opaque.
3) graphic("glBlendFunc(GL_ONE_MINUS_SRC_ALPHA)")
       t=0: total transparency, t=1: opaque.
4) graphic("glBlendFunc(GL_SRC_ALPHA)")
       t=0: opaque, t=1: total transparency.
To vary the transparency see image transp.
Same options as image transp.

transp brush

transp brush(id)

        Returns the transparencies t1 (center) et t2 (edge) of brush id.

transp brush(id)=t1,t2

        Modifies these transparencies.

transp secx

transp secx vol(id)

       The transparencies of all secx vertices of volume id are interpolated between 0.0 and 1.0.
Options:
transp(t1,t1): between t1 and t2.
secx(s1,s2): between secx s1 and s2.

transp secy

transp secy vol(id)

       The transparencies of all secy vertices of volume id are interpolated between 0.0 and 1.0.
Options:
transp(t1,t1): between t1 and t2.
secy(s1,s2): between secy s1 and s2.

transp vertex

transp vertex vol(id)

       The transparencies of all vertices of volume id are interpolated between 0.0 and 1.0.
Options:
transp(t1,t1): between t1 and t2.
vertex(s1,s2): between vertices s1 and s2.

transp texture

transp texture vol(id)

       Returns the property transp texture of volume id.

transp texture vol(id)=tt1,tt2,...

       Changes this property.
Note:
if multiple textures are defined on volume id by texture vol(id)=t1,t2,..., tti is the transparency associated to the texture ti.

transp vol

transp vol(id)

       Returns the 4th transparency component of illum vol(id).

transp vol(id)=t

       Changes this value.
      

See also:

displ image transp
illum vol
graphic OpenGL
image transp
no transp
yes transp
traj transp