explicit ivec4(const ivec3& v, GLint w)
{
mVec[0] = v.x();
mVec[1] = v.y();
mVec[2] = v.z();
mVec[3] = w;
}
//-----------------------------------------------------------------------------
void RaycastVolume::generateTextureCoordinates( const ivec3& size )
{
if ( !size.x() || !size.y() || !size.z() )
{
Log::error( "RaycastVolume::generateTextureCoordinates(): failed! The size passed does not represent a 3D image.\n" );
return;
}
float dx = 0.5f/size.x();
float dy = 0.5f/size.y();
float dz = 0.5f/size.z();
float x0 = 0.0f + dx;
float x1 = 1.0f - dx;
float y0 = 0.0f + dy;
float y1 = 1.0f - dy;
float z0 = 0.0f + dz;
float z1 = 1.0f - dz;
fvec3 texc[] =
{
fvec3( x0,y0,z1 ), fvec3( x1,y0,z1 ), fvec3( x1,y1,z1 ), fvec3( x0,y1,z1 ), // mic fixme: i don't remember why we need z1 here and z0 below...
fvec3( x0,y0,z0 ), fvec3( x1,y0,z0 ), fvec3( x1,y1,z0 ), fvec3( x0,y1,z0 ),
};
memcpy( mTexCoord->ptr(), texc, sizeof( texc ) );
}
//-----------------------------------------------------------------------------
void SlicedVolume::generateTextureCoordinates(const ivec3& img_size)
{
if (!img_size.x() || !img_size.y() || !img_size.z())
{
Log::error("SlicedVolume::generateTextureCoordinates(): failed! The img_size passed does not represent a 3D image.\n");
return;
}
float dx = 0.5f/img_size.x();
float dy = 0.5f/img_size.y();
float dz = 0.5f/img_size.z();
float x0 = 0.0f + dx;
float x1 = 1.0f - dx;
float y0 = 0.0f + dy;
float y1 = 1.0f - dy;
float z0 = 0.0f + dz;
float z1 = 1.0f - dz;
fvec3 texc[] =
{
fvec3(x0,y0,z0), fvec3(x1,y0,z0), fvec3(x1,y1,z0), fvec3(x0,y1,z0),
fvec3(x0,y0,z1), fvec3(x1,y0,z1), fvec3(x1,y1,z1), fvec3(x0,y1,z1),
};
memcpy(mTexCoord, texc, sizeof(texc));
}
//-----------------------------------------------------------------------------
void RaycastVolume::generateTextureCoordinates(const ivec3& img_size, const ivec3& min_corner, const ivec3& max_corner)
{
if (!img_size.x() || !img_size.y() || !img_size.z())
{
Log::error("RaycastVolume::setDisplayRegion(): failed! The size passed does not represent a 3D image.\n");
return;
}
float dx = 0.5f/img_size.x();
float dy = 0.5f/img_size.y();
float dz = 0.5f/img_size.z();
float x0 = min_corner.x()/(float)img_size.x() + dx;
float x1 = max_corner.x()/(float)img_size.x() - dx;
float y0 = min_corner.y()/(float)img_size.y() + dy;
float y1 = max_corner.y()/(float)img_size.y() - dy;
float z0 = min_corner.z()/(float)img_size.z() + dz;
float z1 = max_corner.z()/(float)img_size.z() - dz;
fvec3 texc[] =
{
fvec3( x0,y0,z1 ), fvec3( x1,y0,z1 ), fvec3( x1,y1,z1 ), fvec3( x0,y1,z1 ),
fvec3( x0,y0,z0 ), fvec3( x1,y0,z0 ), fvec3( x1,y1,z0 ), fvec3( x0,y1,z0 ),
};
memcpy( mTexCoord->ptr(), texc, sizeof(texc) );
}
void setUniform(const ivec3& value) { setUniform3i(1, value.ptr()); }
inline ivec3 max(const ivec3& a, int b)
{
return ivec3( a.x() > b ? a.x() : b,
a.y() > b ? a.y() : b,
a.z() > b ? a.z() : b );
}
inline ivec3 max(const ivec3& a, const ivec3& b)
{
return ivec3( a.x() > b.x() ? a.x() : b.x(),
a.y() > b.y() ? a.y() : b.y(),
a.z() > b.z() ? a.z() : b.z() );
}
inline ivec3 min(const ivec3& a, int b)
{
return ivec3( a.x() < b ? a.x() : b,
a.y() < b ? a.y() : b,
a.z() < b ? a.z() : b );
}
inline float dot(const ivec3& v1, const ivec3& v2) { return (float)(v1.x()*v2.x() + v1.y()*v2.y() + v1.z()*v2.z()); }