Hi, now that v.7 is out I will try to raise an old question.
I have been trying to assign face materials to an SDS object from
Javascript. In the C-SDK, this is done by calling SETFACEMATERIALUV,
sending a face index, material name string and a pointer to an array
of vectors, one three dimensional vector for each point in the face.
When trying to replicate this in Javascript I get strange results.
Since I could not find an example on how to do this, I tried sending
different arrays for the uv parameter.
I have faces with three points and tried the most obvious first:
(Actually, the first thing I tried was to create three r3Vect via
"new" and putting the objects in the array - that didn't work either)
var uv = [[0.0, 1.0, 2.0], [3.0, 4.0, 5.0], [6.0, 7.0, 8.0]];
sds.SETFACEMATERIALUV (0, "Material", uv);
This gives me only one point in the UV Editor, the first two
coordinate components are zero but the third is astromonical - a clear
indication that the data I am sending is interpreted as something
other than desired. All attempts I made with nested arrays gave
similar results.
Then I tried the second most obvious format:
var uv = [0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0];
sds.SETFACEMATERIALUV (0, "Material", uv);
This gives me two points in the UV Editor, one point has the
coordinates (0.0, 1.0, 2.0)! The second, however is (0.0, 0.0,
-8040241274831737).
I tried various other sequences of values, including this one:
var uv = [0.0, 1.0, 2.0, 3.0];
sds.SETFACEMATERIALUV (0, "Material", uv);
This gives me three points making up a triangle in the UV Editor. One
point at (0.0, 1.0, 2.0) and the other two at (0.0, 0.0, 0.0). Moving
one of the latter and rendering shows that these are the actual uv
coordinates for this face material.
Does RS javascript not support this method?
*****************
An interesting thing is that, in r3subdiv.js, the parameter type for
the UV list is specified as a single vector and not an array! Compare
this:
R3SUBDIVM_SETFACE = 1235105;
function mR3SUBDIVM_SETFACE(p1, p2, p3) {
if(arguments.length < 3) {
error("SETFACE() needs 3 parameters");
}
return DoA3(this.r3obj, 1235105, p1, R3TID_INTEGER, 0, p2,
R3TID_INTEGER, 0, p3, R3TID_INTEGER, R3TNF_ARRAY);
}
with this:
R3SUBDIVM_SETFACEMATERIALUV = 1235093;
function mR3SUBDIVM_SETFACEMATERIALUV(p1, p2, p3) {
if(arguments.length < 3) {
error("SETFACEMATERIALUV() needs 3 parameters");
}
DoA3(this.r3obj, 1235093, p1, R3TID_INTEGER, 0, p2, R3TID_STRING, 0,
p3, R3TID_VECTOR, 0);
}
The former takes an array of integers as parameter three but the
latter takes only one vector. Odd?
Best regards,
Fredrik
