void CheckCamera()
{
Camera cam = currentCamera;
if (cam == null)
{
return;
}
currentCamPos = cam.transform.position;
currentCamRot = cam.transform.rotation;
_cameraHasMoved = (lastCamPos != currentCamPos || lastCamRot != currentCamRot);
if (_cameraHasMoved)
{
lastCamPos = currentCamPos;
lastCamRot = currentCamRot;
if (frustumPlanes == null)
{
frustumPlanes = new Plane[6];
frustumPlanesDistances = new float[6];
frustumPlanesNormals = new Vector3[6];
}
#if UNITY_IOS || UNITY_WEBGL
#if UNITY_2017_3_OR_NEWER
GeometryUtility.CalculateFrustumPlanes(cam.projectionMatrix * cam.worldToCameraMatrix, frustumPlanes);
#else
frustumPlanes = GeometryUtility.CalculateFrustumPlanes(cam.projectionMatrix * cam.worldToCameraMatrix);
#endif
#else
GeometryUtilityNonAlloc.CalculateFrustumPlanes(frustumPlanes, cam.projectionMatrix * cam.worldToCameraMatrix);
#endif
for (int k = 0; k < 6; k++)
{
frustumPlanesDistances [k] = frustumPlanes [k].distance;
frustumPlanesNormals [k] = frustumPlanes [k].normal;
}
if (frustumCorners == null || frustumCorners.Length != 4)
{
frustumCorners = new Vector3[4];
}
cam.CalculateFrustumCorners(Misc.rectFullViewport, cam.farClipPlane, Camera.MonoOrStereoscopicEye.Mono, frustumCorners);
for (int i = 0; i < 4; i++)
{
frustumCorners [i] = cam.transform.position + cam.transform.TransformVector(frustumCorners [i]);
}
shouldCheckChunksInFrustum = true;
}
}
VoxelChunk PopNearestChunk(int frustumCheckIteration, float acceptedDistanceSqr, float forceChunkSqrDistance, out float chunkDist)
{
chunkDist = 1e8f;
int nearestNode = 0;
float minDist = float.MaxValue;
int node = chunkQueueRoot;
while (node > 0)
{
VoxelChunk chunk = linkedChunks [node].chunk;
float cdx = chunk.position.x - currentCamPos.x;
float cdz = chunk.position.z - currentCamPos.z;
float dist = cdx * cdx + cdz * cdz;
// if chunk is within forced visible distance, return it immediately
if (dist <= forceChunkSqrDistance)
{
chunkDist = dist;
nearestNode = node;
break;
}
// otherwise, prioritize by distance and frustum
if (frustumCheckIteration != chunk.frustumCheckIteration)
{
chunk.frustumCheckIteration = frustumCheckIteration;
Vector3 boundsMin;
boundsMin.x = chunk.position.x - 8;
boundsMin.y = chunk.position.y - 8;
boundsMin.z = chunk.position.z - 8;
Vector3 boundsMax;
boundsMax.x = chunk.position.x + 8;
boundsMax.y = chunk.position.y + 8;
boundsMax.z = chunk.position.z + 8;
chunk.visibleInFrustum = GeometryUtilityNonAlloc.TestPlanesAABB(frustumPlanesNormals, frustumPlanesDistances, ref boundsMin, ref boundsMax);
}
float frontDist = dist;
if (!chunk.visibleInFrustum && !chunk.ignoreFrustum)
{
bool inDistance = frontDist <= acceptedDistanceSqr;
if (onlyRenderInFrustum && !inDistance)
{
node = linkedChunks [node].next;
continue;
}
frontDist += 1000000000;
}
if (frontDist < minDist)
{
minDist = frontDist;
chunkDist = dist;
nearestNode = node;
if (frontDist < acceptedDistanceSqr)
{
break;
}
}
node = linkedChunks [node].next;
}
if (nearestNode > 0)
{
if (nearestNode == chunkQueueRoot)
{
chunkQueueRoot = linkedChunks [nearestNode].next;
linkedChunks [chunkQueueRoot].prev = 0;
}
else
{
if (linkedChunks [nearestNode].prev > 0)
{
linkedChunks [linkedChunks [nearestNode].prev].next = linkedChunks [nearestNode].next;
}
if (linkedChunks [nearestNode].next > 0)
{
linkedChunks [linkedChunks [nearestNode].next].prev = linkedChunks [nearestNode].prev;
}
}
linkedChunks [nearestNode].used = false;
VoxelChunk chunk = linkedChunks [nearestNode].chunk;
return(chunk);
}
return(null);
}
void CheckCuboidVisibility(Octree cuboid)
{
if (cuboid.exploredChildren >= 8)
{
return;
}
Vector3 cuboidCenter = cuboid.center;
float dx = cuboidCenter.x - currentCamPos.x;
if (dx < 0)
{
dx = -dx; // simple abs()
}
dx -= cuboid.extents;
dx /= 16f;
if (dx > _visibleChunksDistance)
{
return;
}
float dy = cuboidCenter.y - currentCamPos.y;
if (dy < 0)
{
dy = -dy;
}
dy -= cuboid.extents;
dy /= 16f;
int chunksYDistance = _visibleChunksDistance >= 8 ? 8 : _visibleChunksDistance;
if (dy > chunksYDistance)
{
return;
}
float dz = cuboidCenter.z - currentCamPos.z;
if (dz < 0)
{
dz = -dz;
}
dz -= cuboid.extents;
dz /= 16f;
if (dz > _visibleChunksDistance)
{
return;
}
Vector3 cuboidMin, cuboidMax;
cuboidMin.x = cuboidCenter.x - cuboid.extents;
cuboidMin.y = cuboidCenter.y - cuboid.extents;
cuboidMin.z = cuboidCenter.z - cuboid.extents;
cuboidMax.x = cuboidCenter.x + cuboid.extents;
cuboidMax.y = cuboidCenter.y + cuboid.extents;
cuboidMax.z = cuboidCenter.z + cuboid.extents;
bool inFrustum;
if (onlyRenderInFrustum)
{
inFrustum = GeometryUtilityNonAlloc.TestPlanesAABB(frustumPlanesNormals, frustumPlanesDistances, ref cuboidMin, ref cuboidMax);
}
else
{
inFrustum = true;
}
if (inFrustum)
{
int cuboidSize = cuboid.extents * 2;
if (cuboidSize > 16)
{
if (cuboid.children == null)
{
cuboid.Explode();
}
for (int k = 0; k < 8; k++)
{
if (!cuboid.children [k].explored)
{
PushCuboid(cuboid.children [k]);
}
}
return;
}
// cuboid is less than a chunk - use that chunk
int chunkX, chunkY, chunkZ;
GetChunkCoordinates(cuboid.center, out chunkX, out chunkY, out chunkZ);
int hash = GetChunkHash(chunkX, chunkY, chunkZ);
CachedChunk cachedChunk;
if (cachedChunks.TryGetValue(hash, out cachedChunk))
{
cachedChunk.octree = cuboid;
cuboid.parent.exploredChildren++;
cuboid.explored = true;
VoxelChunk chunk = cachedChunk.chunk;
if (chunk == null)
{
return;
}
if (chunk.isPopulated)
{
// If this chunk has been created but not rendered yet, request it
// if (chunk.renderState == ChunkRenderState.Pending && !chunk.inqueue) {
if (chunk.renderState != ChunkRenderState.RenderingComplete || !chunk.mr.enabled)
{
if (chunk.inqueue)
{
chunk.needsMeshRebuild = true;
}
else
{
ChunkRequestRefresh(chunk, false, true);
}
}
return;
}
}
CreateChunk(hash, chunkX, chunkY, chunkZ, false);
chunkCreationCountThisFrame++;
}
}