public static bool PickLastEmptyVoxel(CogBlockVolume volume, Vector3 origin, Vector3 direction, float distance, out PickVoxelResult pickResult)
{
// This 'out' value needs to be initialised even if we don't hit
// anything (in which case it will be left at it's default value).
pickResult = new PickVoxelResult();
// Can't hit it the volume if there's no data.
if ((volume.data == null) || (volume.data.volumeHandle == null))
{
return(false);
}
//again, transforming to volume space
Vector3 target = origin + direction * distance;
origin = volume.transform.InverseTransformPoint(origin);
target = volume.transform.InverseTransformPoint(target);
direction = target - origin;
// Now call through to the Cubiquity dll to do the actual picking.
pickResult = new PickVoxelResult();
uint hit = CubiquityDLL.PickLastEmptyVoxel((uint)volume.data.volumeHandle,
origin.x, origin.y, origin.z,
direction.x, direction.y, direction.z,
out pickResult.volumeSpacePos.x, out pickResult.volumeSpacePos.y, out pickResult.volumeSpacePos.z);
//transform back out into worldspace
pickResult.worldSpacePos = volume.transform.TransformPoint((Vector3)(pickResult.volumeSpacePos));
// Return true if we hit a surface.
return(hit == 1);
}
public static bool PickFirstSolidVoxel(CogBlockVolume volume, Vector3 origin, Vector3 direction, float distance, out PickVoxelResult pickResult)
{
//initialization of an empty struct
pickResult = new PickVoxelResult();
// Can't hit it the volume if there's no data.
if ((volume.data == null) || (volume.data.volumeHandle == null))
{
return(false);
}
//As noted by cubiquity, where cubqity's picking code works in volume space, Unity needs to work in world space...
// Cubiquity's picking code works in volume space whereas we expose an interface that works in world
//Grab our ray's components and transform them for volume space.
Vector3 target = origin + direction * distance;
origin = volume.transform.InverseTransformPoint(origin);
target = volume.transform.InverseTransformPoint(target);
direction = target - origin;
// Now call through to the Cubiquity dll to do the actual picking.
//Recall that CubiquityDLL will only have to work with ColoredCubeData, but that we are translating that boldface into CogBlockVolume data.
uint hit = CubiquityDLL.PickFirstSolidVoxel((uint)volume.data.volumeHandle,
origin.x, origin.y, origin.z,
direction.x, direction.y, direction.z,
out pickResult.volumeSpacePos.x, out pickResult.volumeSpacePos.y, out pickResult.volumeSpacePos.z);
// The result is in volume space, but again it is more convienient for Unity users to have the result
// in world space. Therefore we apply the volume's volume-to-world transform to the volume space position.
pickResult.worldSpacePos = volume.transform.TransformPoint((Vector3)(pickResult.volumeSpacePos));
// Return true if we hit a surface.
return(hit == 1);
}
public static bool PickLastEmptyVoxel(CogBlockVolume volume, Ray ray, float distance, out PickVoxelResult pickResult)
{
//split ray into origin and direction again
return(PickLastEmptyVoxel(volume, ray.origin, ray.direction, distance, out pickResult));
}
public static bool PickFirstSolidVoxel(CogBlockVolume volume, Ray ray, float distance, out PickVoxelResult pickResult)
{
//we want our ray divided into an origin and a direction
return(PickFirstSolidVoxel(volume, ray.origin, ray.direction, distance, out pickResult));
}
