// Here we set up transformations. These are just examples, set up so
// that our unit tests can transform among spaces in ways that we will
// recognize as correct. The "shader" and "object" spaces are required
// by OSL and the ShaderGlobals will need to have references to them.
// For good measure, we also set up a "myspace" space, registering it
// with the RendererServices.
//
static void
setup_transformations (SimpleRenderer &rend, OSL::Matrix44 &Mshad,
OSL::Matrix44 &Mobj)
{
Matrix44 M (1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1);
rend.camera_params (M, ustring("perspective"), 90.0f,
0.1f, 1000.0f, xres, yres);
// Make a "shader" space that is translated one unit in x and rotated
// 45deg about the z axis.
Mshad.makeIdentity ();
Mshad.translate (OSL::Vec3 (1.0, 0.0, 0.0));
Mshad.rotate (OSL::Vec3 (0.0, 0.0, M_PI_4));
// std::cout << "shader-to-common matrix: " << Mshad << "\n";
// Make an object space that is translated one unit in y and rotated
// 90deg about the z axis.
Mobj.makeIdentity ();
Mobj.translate (OSL::Vec3 (0.0, 1.0, 0.0));
Mobj.rotate (OSL::Vec3 (0.0, 0.0, M_PI_2));
// std::cout << "object-to-common matrix: " << Mobj << "\n";
OSL::Matrix44 Mmyspace;
Mmyspace.scale (OSL::Vec3 (1.0, 2.0, 1.0));
// std::cout << "myspace-to-common matrix: " << Mmyspace << "\n";
rend.name_transform ("myspace", Mmyspace);
}
bool OSLRenderServices::get_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
ustring from,
float time)
{
ShaderData *sd = (ShaderData *)(sg->renderstate);
KernelGlobals *kg = sd->osl_globals;
if (from == u_ndc) {
copy_matrix(result, kernel_data.cam.ndctoworld);
return true;
}
else if (from == u_raster) {
copy_matrix(result, kernel_data.cam.rastertoworld);
return true;
}
else if (from == u_screen) {
copy_matrix(result, kernel_data.cam.screentoworld);
return true;
}
else if (from == u_camera) {
copy_matrix(result, kernel_data.cam.cameratoworld);
return true;
}
else if (from == u_world) {
result.makeIdentity();
return true;
}
return false;
}
bool OSLRenderServices::get_inverse_matrix(OSL::ShaderGlobals *sg,
OSL::Matrix44 &result,
ustring to,
float time)
{
ShaderData *sd = (ShaderData *)(sg->renderstate);
KernelGlobals *kg = sd->osl_globals;
if (to == u_ndc) {
copy_matrix(result, kernel_data.cam.worldtondc);
return true;
}
else if (to == u_raster) {
copy_matrix(result, kernel_data.cam.worldtoraster);
return true;
}
else if (to == u_screen) {
copy_matrix(result, kernel_data.cam.worldtoscreen);
return true;
}
else if (to == u_camera) {
copy_matrix(result, kernel_data.cam.worldtocamera);
return true;
}
else if (to == u_world) {
result.makeIdentity();
return true;
}
return false;
}
bool OSLRenderServices::get_inverse_matrix(OSL::ShaderGlobals *sg, OSL::Matrix44 &result, ustring to, float time)
{
KernelGlobals *kg = kernel_globals;
if(to == u_ndc) {
Transform tfm = transform_transpose(kernel_data.cam.worldtondc);
COPY_MATRIX44(&result, &tfm);
return true;
}
else if(to == u_raster) {
Transform tfm = transform_transpose(kernel_data.cam.worldtoraster);
COPY_MATRIX44(&result, &tfm);
return true;
}
else if(to == u_screen) {
Transform tfm = transform_transpose(kernel_data.cam.worldtoscreen);
COPY_MATRIX44(&result, &tfm);
return true;
}
else if(to == u_camera) {
Transform tfm = transform_transpose(kernel_data.cam.worldtocamera);
COPY_MATRIX44(&result, &tfm);
return true;
}
else if(to == u_world) {
result.makeIdentity();
return true;
}
return false;
}