/* called by the C++ code to render */
extern "C" void device_render (int* pixels,
const int width,
const int height,
const float time,
const ISPCCamera& camera)
{
float t0 = 0.7f*time;
float t1 = 1.5f*time;
/* rotate instances around themselves */
LinearSpace3fa xfm;
xfm.vx = Vec3fa(cos(t1),0,sin(t1));
xfm.vy = Vec3fa(0,1,0);
xfm.vz = Vec3fa(-sin(t1),0,cos(t1));
/* calculate transformations to move instances in cirle */
for (int i=0; i<4; i++) {
float t = t0+i*2.0f*float(pi)/4.0f;
instance_xfm[i] = AffineSpace3fa(xfm,2.2f*Vec3fa(+cos(t),0.0f,+sin(t)));
}
/* calculate transformations to properly transform normals */
for (int i=0; i<4; i++)
normal_xfm[i] = transposed(rcp(instance_xfm[i].l));
/* set instance transformations */
rtcSetTransform(g_scene,g_instance0,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&instance_xfm[0]);
rtcSetTransform(g_scene,g_instance1,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&instance_xfm[1]);
rtcSetTransform(g_scene,g_instance2,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&instance_xfm[2]);
rtcSetTransform(g_scene,g_instance3,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&instance_xfm[3]);
/* update scene */
rtcUpdate(g_scene,g_instance0);
rtcUpdate(g_scene,g_instance1);
rtcUpdate(g_scene,g_instance2);
rtcUpdate(g_scene,g_instance3);
rtcCommit (g_scene);
/* render all pixels */
const int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X;
const int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y;
parallel_for(size_t(0),size_t(numTilesX*numTilesY),[&](const range<size_t>& range) {
for (size_t i=range.begin(); i<range.end(); i++)
renderTileTask(i,pixels,width,height,time,camera,numTilesX,numTilesY);
});
}
void Raytracer::updateScene()
{
_transforms.clear();
TransformReadVisitor visitor(&_transforms);
_rootNode->accept(visitor);
for (int i =0; i < _transforms.size();++i)
{
osg::Matrixf mat = _transforms[i];
rtcSetTransform(_scene, _meshToGeo.at(i), RTC_MATRIX_ROW_MAJOR, mat.ptr());
}
}
/* called by the C++ code to render */
extern "C" void device_render (int* pixels,
const int width,
const int height,
const float time,
const Vec3fa& vx,
const Vec3fa& vy,
const Vec3fa& vz,
const Vec3fa& p)
{
/* create identity matrix */
AffineSpace3fa xfm;
xfm.l.vx = Vec3fa(1,0,0);
xfm.l.vy = Vec3fa(0,1,0);
xfm.l.vz = Vec3fa(0,0,1);
xfm.p = Vec3fa(0,0,0);
float t = 0.7f*time;
/* move instances */
xfm.p = 2.0f*Vec3fa(+cos(t),0.0f,+sin(t));
rtcSetTransform(g_scene,g_instance0,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&xfm);
xfm.p = 2.0f*Vec3fa(-cos(t),0.0f,-sin(t));
rtcSetTransform(g_scene,g_instance1,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&xfm);
xfm.p = 2.0f*Vec3fa(-sin(t),0.0f,+cos(t));
rtcSetTransform(g_scene,g_instance2,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&xfm);
xfm.p = 2.0f*Vec3fa(+sin(t),0.0f,-cos(t));
rtcSetTransform(g_scene,g_instance3,RTC_MATRIX_COLUMN_MAJOR_ALIGNED16,(float*)&xfm);
/* update scene */
rtcUpdate(g_scene,g_instance0);
rtcUpdate(g_scene,g_instance1);
rtcUpdate(g_scene,g_instance2);
rtcUpdate(g_scene,g_instance3);
rtcCommit (g_scene);
/* render all pixels */
const int numTilesX = (width +TILE_SIZE_X-1)/TILE_SIZE_X;
const int numTilesY = (height+TILE_SIZE_Y-1)/TILE_SIZE_Y;
launch_renderTile(numTilesX*numTilesY,pixels,width,height,time,vx,vy,vz,p,numTilesX,numTilesY);
}
extern "C" void ispcSetTransform (RTCScene scene, unsigned geomID, RTCMatrixType layout, const float* xfm) {
return rtcSetTransform(scene,geomID,layout,xfm);
}
