1017 lines
38 KiB
Plaintext
1017 lines
38 KiB
Plaintext
import Common;
|
|
import Bisector;
|
|
import CBT;
|
|
import Parameters;
|
|
|
|
// Needs to be defined before including update_utilities
|
|
struct BisectorGeometry
|
|
{
|
|
float3 p[4];
|
|
};
|
|
|
|
// Possible splits
|
|
static const uint64_t NO_SPLIT = 0x00;
|
|
static const uint64_t CENTER_SPLIT = 0x01;
|
|
static const uint64_t RIGHT_SPLIT = 0x02;
|
|
static const uint64_t LEFT_SPLIT = 0x04;
|
|
static const uint64_t RIGHT_DOUBLE_SPLIT = (CENTER_SPLIT | RIGHT_SPLIT);
|
|
static const uint64_t LEFT_DOUBLE_SPLIT = (CENTER_SPLIT | LEFT_SPLIT);
|
|
static const uint64_t TRIPLE_SPLIT = (CENTER_SPLIT | RIGHT_SPLIT | LEFT_SPLIT);
|
|
|
|
// Split buffer slots
|
|
static const uint64_t SPLIT_COUNTER = 0;
|
|
static const uint64_t SIMPLIFY_COUNTER = 1;
|
|
static const uint64_t CLASSIFY_COUNTER_OFFSET = 2;
|
|
|
|
bool FrustumAABBIntersect(in Frustum frustum, float3 aabbMin, float3 aabbMax)
|
|
{
|
|
float3 center = (aabbMax + aabbMin) * 0.5;
|
|
float3 extents = (aabbMax - aabbMin) * 0.5;
|
|
for (int i = 0; i < 4; i++)
|
|
{
|
|
Plane plane = frustum.sides[i];
|
|
float3 normal_sign = sign(plane.n);
|
|
float3 test_point = center + extents * normal_sign;
|
|
|
|
float dotProd = dot(test_point, plane.n);
|
|
if (dotProd + plane.d < 0)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int ClassifyBisector(in BisectorGeometry tri, uint depth)
|
|
{
|
|
// Check the triangle's visibility
|
|
float3 triNormal = normalize(cross(tri.p[2] - tri.p[1], tri.p[0] - tri.p[1]));
|
|
float3 triCenter = (tri.p[0] + tri.p[1] + tri.p[2]) / 3.0;
|
|
float3 viewDir = normalize(-triCenter);
|
|
float FdotV = dot(viewDir, pViewParams.cameraForward_WS.xyz);
|
|
float VdotN = dot(viewDir, triNormal);
|
|
|
|
// Here we don't use 0 as it introduces stability issues at grazing angles
|
|
if (FdotV < 0.0 && VdotN < -1e-3)
|
|
return BACK_FACE_CULLED;
|
|
|
|
// Compute the triangle's AABB
|
|
float3 aabbMin = float3(min(min(tri.p[0].x, tri.p[1].x), tri.p[2].x), min(min(tri.p[0].y, tri.p[1].y), tri.p[2].y), min(min(tri.p[0].z, tri.p[1].z), tri.p[2].z));
|
|
float3 aabbMax = float3(max(max(tri.p[0].x, tri.p[1].x), tri.p[2].x), max(max(tri.p[0].y, tri.p[1].y), tri.p[2].y), max(max(tri.p[0].z, tri.p[1].z), tri.p[2].z));
|
|
|
|
// First we do a frustum culling pass
|
|
if (!FrustumAABBIntersect(pViewParams.viewFrustum, aabbMin, aabbMax))
|
|
return FRUSTUM_CULLED;
|
|
|
|
// Project the points on screen
|
|
float4x4 viewProjectionMatrix = pParams.update.viewProjectionMatrix;//mul(pViewParams.projectionMatrix, pViewParams.viewMatrix);
|
|
float4 p0P = mul(viewProjectionMatrix, float4(tri.p[0], 1.0));
|
|
p0P.xy = p0P.xy / p0P.w;
|
|
p0P.xy = (p0P.xy * 0.5 + 0.5);
|
|
|
|
float4 p1P = mul(viewProjectionMatrix, float4(tri.p[1], 1.0));
|
|
p1P.xy = p1P.xy / p1P.w;
|
|
p1P.xy = (p1P.xy * 0.5 + 0.5);
|
|
|
|
float4 p2P = mul(viewProjectionMatrix, float4(tri.p[2], 1.0));
|
|
p2P.xy = p2P.xy / p2P.w;
|
|
p2P.xy = (p2P.xy * 0.5 + 0.5);
|
|
|
|
// 2D area of the triangle
|
|
// here we didn't reverse the sign of the y coordinate at projection time, but we simply adapted the area evaluation
|
|
// The same way we don't multiply by the screen size before, but after which is equivalent
|
|
float area = 0.5 * abs(p0P.x * (p2P.y - p1P.y) + p1P.x * (p0P.y - p2P.y) + p2P.x * (p1P.y - p0P.y));
|
|
area *= pViewParams.screenDimensions.x * pViewParams.screenDimensions.y;
|
|
|
|
// We over estimate the area at grazing angles
|
|
float areaOverestimation = lerp(2.0, 1.0, pow(VdotN, 0.2));
|
|
area *= areaOverestimation;
|
|
|
|
// If the triangle's area is bigger than the target size and the depth is not the maximal depth, subdivide
|
|
if (pParams.update.triangleSize < area && depth < pParams.update.maxSubdivisionDepth)
|
|
{
|
|
// If the area is really big, put it in high priority.
|
|
return BISECT_ELEMENT;
|
|
}
|
|
else if ((pParams.update.triangleSize * 0.5 > area) || (depth > pParams.update.maxSubdivisionDepth))
|
|
{
|
|
// Transform the parent's point
|
|
float4 p3P = mul(viewProjectionMatrix, float4(tri.p[3], 1.0));
|
|
p3P.xy = p3P.xy / p3P.w;
|
|
p3P.xy = (p3P.xy * 0.5 + 0.5);
|
|
|
|
// Evaluate the parent area
|
|
float areaParent = 0.5 * abs(p0P.x * (p2P.y - p3P.y) + p3P.x * (p0P.y - p2P.y) + p2P.x * (p3P.y - p0P.y));
|
|
areaParent *= pViewParams.screenDimensions.x * pViewParams.screenDimensions.y;
|
|
areaParent *= areaOverestimation;
|
|
|
|
// If the depth is too high (max depth changed) or the area is too
|
|
return ((pParams.update.triangleSize >= areaParent ) || (depth > pParams.update.maxSubdivisionDepth)) ? TOO_SMALL : UNCHANGED_ELEMENT;
|
|
}
|
|
return UNCHANGED_ELEMENT;
|
|
}
|
|
|
|
void ResetBuffers()
|
|
{
|
|
pParams.memoryBuffer[0] = 0;
|
|
pParams.memoryBuffer[1] = cbt_size() - bit_count_buffer();
|
|
|
|
pParams.classificationBuffer[SPLIT_COUNTER] = 0;
|
|
pParams.classificationBuffer[SIMPLIFY_COUNTER] = 0;
|
|
|
|
pParams.allocateBuffer[0] = 0;
|
|
|
|
pParams.propagateBuffer[0] = 0;
|
|
pParams.propagateBuffer[1] = 0;
|
|
|
|
pParams.simplifyBuffer[0] = 0;
|
|
|
|
pParams.indirectDrawBuffer[0] = 0;
|
|
pParams.indirectDrawBuffer[1] = 1;
|
|
pParams.indirectDrawBuffer[2] = 0;
|
|
pParams.indirectDrawBuffer[3] = 0;
|
|
|
|
pParams.indirectDrawBuffer[4] = 0;
|
|
pParams.indirectDrawBuffer[5] = 1;
|
|
pParams.indirectDrawBuffer[6] = 0;
|
|
pParams.indirectDrawBuffer[7] = 0;
|
|
|
|
pParams.indirectDrawBuffer[8] = 0;
|
|
}
|
|
|
|
void ClassifyElement(uint currentID, BisectorGeometry bis, uint totalNumElements, uint baseDepth)
|
|
{
|
|
// Evaluate the depth of the element
|
|
uint64_t heapID = pParams.heapIDBuffer[currentID];
|
|
uint depth = HeapIDDepth(heapID);
|
|
BisectorData cbisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// Reset some values
|
|
cbisectorData.subdivisionPattern = 0;
|
|
cbisectorData.bisectorState = UNCHANGED_ELEMENT;
|
|
cbisectorData.problematicNeighbor = INVALID_POINTER;
|
|
cbisectorData.flags = VISIBLE_BISECTOR;
|
|
|
|
// Does this triangle intersect the circle?
|
|
int currentValidity = ClassifyBisector(bis, depth);
|
|
if (currentValidity > UNCHANGED_ELEMENT)
|
|
{
|
|
// This element should be bisected
|
|
uint targetSlot = 0;
|
|
cbisectorData.bisectorState = BISECT_ELEMENT;
|
|
InterlockedAdd(pParams.classificationBuffer[SPLIT_COUNTER], 1, targetSlot);
|
|
pParams.classificationBuffer[CLASSIFY_COUNTER_OFFSET + targetSlot] = currentID;
|
|
|
|
}
|
|
else
|
|
cbisectorData.flags = currentValidity >= TOO_SMALL ? VISIBLE_BISECTOR : 0;
|
|
|
|
// What's the validity of the father?
|
|
if (baseDepth != depth && currentValidity < UNCHANGED_ELEMENT)
|
|
{
|
|
// Mark that it requires simplification
|
|
cbisectorData.bisectorState = SIMPLIFY_ELEMENT;
|
|
|
|
// Only register it if it has an even heapID, the odd ones will be processed by the even ones
|
|
if (heapID % 2 == 0)
|
|
{
|
|
uint targetSlot = 0;
|
|
InterlockedAdd(pParams.classificationBuffer[SIMPLIFY_COUNTER], 1, targetSlot);
|
|
pParams.classificationBuffer[CLASSIFY_COUNTER_OFFSET + totalNumElements + targetSlot] = currentID;
|
|
}
|
|
}
|
|
|
|
// Update the bisector data
|
|
pParams.bisectorDataBuffer[currentID] = cbisectorData;
|
|
}
|
|
|
|
void SplitElement(uint currentID, uint baseDepth)
|
|
{
|
|
// Get the neighbors information
|
|
uint4 cNeighbors = pParams.neighboursBuffer[currentID];
|
|
|
|
// If there is a neighbor X
|
|
if (cNeighbors.x != INVALID_POINTER)
|
|
{
|
|
// This is on the path of it's neighbor X
|
|
uint4 xNeighbors = pParams.neighboursBuffer[cNeighbors.x];
|
|
if (xNeighbors.z == currentID && pParams.bisectorDataBuffer[cNeighbors.x].bisectorState != UNCHANGED_ELEMENT)
|
|
return;
|
|
}
|
|
|
|
// If there is a neighbor Y
|
|
if (cNeighbors.y != INVALID_POINTER)
|
|
{
|
|
// This is on the path of it's neighbor Y
|
|
uint4 yNeighbors = pParams.neighboursBuffer[cNeighbors.y];
|
|
if (yNeighbors.z == currentID && pParams.bisectorDataBuffer[cNeighbors.y].bisectorState != UNCHANGED_ELEMENT)
|
|
return;
|
|
}
|
|
|
|
// Depth of the current triangle
|
|
uint64_t heapID = pParams.heapIDBuffer[currentID];
|
|
uint currentDepth = HeapIDDepth(heapID);
|
|
|
|
// Compute the maximal required memory for this subdivision
|
|
int maxRequiredMemory = 2 * (currentDepth - baseDepth) - 1;
|
|
|
|
// Get the twin information
|
|
uint twinID = cNeighbors.z;
|
|
|
|
// This avoid the massive over-reservation and saves a bunch of artifacts
|
|
if (twinID == INVALID_POINTER)
|
|
maxRequiredMemory = 1;
|
|
else if (pParams.neighboursBuffer[twinID].z == currentID)
|
|
maxRequiredMemory = 2;
|
|
|
|
|
|
// Try to reserve
|
|
int remainingMemory;
|
|
InterlockedAdd(pParams.memoryBuffer[1], -maxRequiredMemory, remainingMemory);
|
|
// Did someone manage to sneak-in while we were trying to pick the memory, add it back and try again
|
|
if (remainingMemory < maxRequiredMemory)
|
|
{
|
|
// Then add back the required memory and stop
|
|
InterlockedAdd(pParams.memoryBuffer[1], maxRequiredMemory, remainingMemory);
|
|
return;
|
|
}
|
|
|
|
// Let's actually count the memory that we will be using
|
|
int usedMemory = 1;
|
|
uint prevPattern;
|
|
InterlockedOr(pParams.bisectorDataBuffer[currentID].subdivisionPattern, CENTER_SPLIT, prevPattern);
|
|
|
|
// If this is not zero, it means an other neighbor went faster than us, we restore the memory and leave.
|
|
if (prevPattern != 0)
|
|
{
|
|
InterlockedAdd(pParams.memoryBuffer[1], maxRequiredMemory, remainingMemory);
|
|
return;
|
|
}
|
|
|
|
// Mark this for allocation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.allocateBuffer[0], 1, targetLocation);
|
|
pParams.allocateBuffer[1 + targetLocation] = currentID;
|
|
|
|
// While we're not done (up the tree or everything is subdivided properly)
|
|
bool done = false;
|
|
while (!done)
|
|
{
|
|
// If this neighbor is not allocated, we're done.
|
|
if (twinID == INVALID_POINTER)
|
|
break;
|
|
|
|
// Grab the bisector of the neighbor
|
|
uint64_t nHeapID = pParams.heapIDBuffer[twinID];
|
|
BisectorData nBisectorData = pParams.bisectorDataBuffer[twinID];
|
|
uint nDepth = HeapIDDepth(nHeapID);
|
|
uint4 nNeighbors = pParams.neighboursBuffer[twinID];
|
|
|
|
// If both triangles have the same depth
|
|
if (nDepth == currentDepth)
|
|
{
|
|
// Raised the center split
|
|
InterlockedOr(pParams.bisectorDataBuffer[twinID].subdivisionPattern, CENTER_SPLIT, prevPattern);
|
|
|
|
// Only account for it if it was not raised before.
|
|
if (prevPattern == 0)
|
|
{
|
|
// Mark this for allocation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.allocateBuffer[0], 1, targetLocation);
|
|
pParams.allocateBuffer[1 + targetLocation] = twinID;
|
|
usedMemory++;
|
|
}
|
|
|
|
// And we're done
|
|
done = true;
|
|
}
|
|
// If this node has already been subdivided, it means that we need to add the third subdivision and we're done
|
|
else
|
|
{
|
|
if (nNeighbors[0] == currentID)
|
|
InterlockedOr(pParams.bisectorDataBuffer[twinID].subdivisionPattern, RIGHT_DOUBLE_SPLIT, prevPattern);
|
|
else // if (nNeighbors[1] == currentID)
|
|
InterlockedOr(pParams.bisectorDataBuffer[twinID].subdivisionPattern, LEFT_DOUBLE_SPLIT, prevPattern);
|
|
|
|
if (prevPattern != 0)
|
|
{
|
|
usedMemory++;
|
|
done = true;
|
|
}
|
|
else
|
|
{
|
|
// Mark this for allocation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.allocateBuffer[0], 1, targetLocation);
|
|
pParams.allocateBuffer[1 + targetLocation] = twinID;
|
|
|
|
// Account for two splits
|
|
usedMemory += 2;
|
|
|
|
// the new bisector that needs to be propagated
|
|
currentID = twinID;
|
|
currentDepth = nDepth;
|
|
twinID = pParams.neighboursBuffer[currentID].z;
|
|
}
|
|
}
|
|
}
|
|
// Add back the unused memory (in case)
|
|
InterlockedAdd(pParams.memoryBuffer[1], maxRequiredMemory - usedMemory, remainingMemory);
|
|
}
|
|
|
|
void AllocateElement(uint currentID)
|
|
{
|
|
// Load the bisector for this element
|
|
BisectorData bisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// Does this guy need to be subdivided
|
|
if (bisectorData.subdivisionPattern != 0)
|
|
{
|
|
// How many bits do we need?
|
|
int numSlots = countbits(bisectorData.subdivisionPattern);
|
|
|
|
// Request the number of bits we need using an interlock add
|
|
uint firstBitIndex = 0;
|
|
InterlockedAdd(pParams.memoryBuffer[0], numSlots, firstBitIndex);
|
|
|
|
// llocate the bits we need
|
|
for (uint bitId = 0; bitId < numSlots; ++bitId)
|
|
{
|
|
uint index = decode_bit_complement(firstBitIndex + bitId);
|
|
bisectorData.indices[bitId] = index;
|
|
}
|
|
|
|
// Output
|
|
pParams.bisectorDataBuffer[currentID] = bisectorData;
|
|
}
|
|
}
|
|
|
|
#define SUBLING0_ID 0
|
|
#define SUBLING1_ID 1
|
|
#define SUBLING2_ID 2
|
|
void evaluate_neighbors(uint currentID, uint bisectorID, out uint resX, out uint resY)
|
|
{
|
|
BisectorData nBisectorData = pParams.bisectorDataBuffer[bisectorID];
|
|
uint4 nNeighbors = pParams.neighboursBuffer[bisectorID];
|
|
if (nBisectorData.subdivisionPattern == 0x01)
|
|
{
|
|
resX = nBisectorData.indices[SUBLING0_ID];
|
|
resY = bisectorID;
|
|
}
|
|
else if (nBisectorData.subdivisionPattern == 0x03)
|
|
{
|
|
if (nNeighbors[0] == currentID)
|
|
{
|
|
resX = nBisectorData.indices[SUBLING1_ID];
|
|
resY = bisectorID;
|
|
}
|
|
else
|
|
{
|
|
resX = nBisectorData.indices[SUBLING0_ID];
|
|
resY = nBisectorData.indices[SUBLING1_ID];
|
|
}
|
|
}
|
|
else if (nBisectorData.subdivisionPattern == 0x05)
|
|
{
|
|
if (nNeighbors[1] == currentID)
|
|
{
|
|
resX = nBisectorData.indices[SUBLING1_ID];
|
|
resY = nBisectorData.indices[SUBLING0_ID];
|
|
}
|
|
else
|
|
{
|
|
resX = nBisectorData.indices[SUBLING0_ID];
|
|
resY = bisectorID;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (nNeighbors[0] == currentID)
|
|
{
|
|
resX = nBisectorData.indices[SUBLING1_ID];
|
|
resY = bisectorID;
|
|
}
|
|
else if (nNeighbors[1] == currentID)
|
|
{
|
|
resX = nBisectorData.indices[SUBLING2_ID];
|
|
resY = nBisectorData.indices[SUBLING0_ID];
|
|
}
|
|
else
|
|
{
|
|
resX = nBisectorData.indices[SUBLING0_ID];
|
|
resY = nBisectorData.indices[SUBLING1_ID];
|
|
}
|
|
}
|
|
}
|
|
|
|
void BisectElement(uint currentID, uint dispatchID)
|
|
{
|
|
DebugStruct debug;
|
|
// If this bisector is not allocated or not subdivided, stop right away
|
|
uint64_t baseHeapID = pParams.heapIDBuffer[currentID];
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
debug.baseHeapID = baseHeapID;
|
|
debug.subdivision = cBisectorData.subdivisionPattern;
|
|
debug.propagateLocation = 0;
|
|
if (baseHeapID == 0 || cBisectorData.subdivisionPattern == NO_SPLIT)
|
|
return;
|
|
|
|
// Load the bisector data of the target triangle
|
|
uint currentSubdiv = cBisectorData.subdivisionPattern;
|
|
|
|
// neighbors of the parent
|
|
uint4 cNeighbors = pParams.neighboursBuffer[currentID];
|
|
uint p_n0 = cNeighbors[0];
|
|
uint p_n1 = cNeighbors[1];
|
|
uint p_n2 = cNeighbors[2];
|
|
|
|
// Get the main axis subdiv
|
|
uint siblingID0 = cBisectorData.indices[0];
|
|
uint siblingID1 = cBisectorData.indices[1];
|
|
uint siblingID2 = cBisectorData.indices[2];
|
|
|
|
debug.indices[0] = cBisectorData.indices[0];
|
|
debug.indices[1] = cBisectorData.indices[1];
|
|
debug.indices[2] = cBisectorData.indices[2];
|
|
debug.indices[3] = 0;
|
|
|
|
// Simple subdivision (along the main axis)
|
|
if (currentSubdiv == CENTER_SPLIT)
|
|
{
|
|
uint resX = INVALID_POINTER, resY = INVALID_POINTER;
|
|
if (p_n2 != INVALID_POINTER)
|
|
evaluate_neighbors(currentID, p_n2, resX, resY);
|
|
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[currentID] = 2 * baseHeapID;
|
|
pParams.heapIDBuffer[siblingID0] = 2 * baseHeapID + 1;
|
|
|
|
// Update the neighbors
|
|
uint4 modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID0;
|
|
modifiedNeighbors[1] = resX;
|
|
modifiedNeighbors[2] = p_n0;
|
|
pParams.neighboursOutputBuffer[currentID] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = resY;
|
|
modifiedNeighbors[1] = currentID;
|
|
modifiedNeighbors[2] = p_n1;
|
|
pParams.neighboursOutputBuffer[siblingID0] = modifiedNeighbors;
|
|
|
|
// Keep track of the parent
|
|
BisectorData modifiedBisector = cBisectorData;
|
|
modifiedBisector.indices[0] = cBisectorData.indices[0];
|
|
modifiedBisector.indices[1] = cBisectorData.indices[1];
|
|
modifiedBisector.indices[2] = cBisectorData.indices[2];
|
|
modifiedBisector.subdivisionPattern = cBisectorData.subdivisionPattern;
|
|
modifiedBisector.bisectorState = cBisectorData.bisectorState;
|
|
modifiedBisector.propagationID = currentID;
|
|
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[currentID] = modifiedBisector;
|
|
|
|
modifiedBisector.problematicNeighbor = p_n1;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID0] = modifiedBisector;
|
|
|
|
// Mark this for propagation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.propagateBuffer[0], 1, targetLocation);
|
|
pParams.propagateBuffer[2 + targetLocation] = siblingID0;
|
|
debug.propagateLocation = targetLocation;
|
|
}
|
|
else if (currentSubdiv == RIGHT_DOUBLE_SPLIT)
|
|
{
|
|
// Grab the bisector of the twin
|
|
uint res0X = INVALID_POINTER, res0Y = INVALID_POINTER;
|
|
evaluate_neighbors(currentID, p_n0, res0X, res0Y);
|
|
|
|
uint res1X = INVALID_POINTER, res1Y = INVALID_POINTER;
|
|
if (p_n2 != INVALID_POINTER)
|
|
evaluate_neighbors(currentID, p_n2, res1X, res1Y);
|
|
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[currentID] = 4 * baseHeapID;
|
|
pParams.heapIDBuffer[siblingID0] = 2 * baseHeapID + 1;
|
|
pParams.heapIDBuffer[siblingID1] = 4 * baseHeapID + 1;
|
|
|
|
uint4 modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID1;
|
|
modifiedNeighbors[1] = res0X;
|
|
modifiedNeighbors[2] = siblingID0;
|
|
pParams.neighboursOutputBuffer[currentID] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = res1Y;
|
|
modifiedNeighbors[1] = currentID;
|
|
modifiedNeighbors[2] = p_n1;
|
|
pParams.neighboursOutputBuffer[siblingID0] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = res0Y;
|
|
modifiedNeighbors[1] = currentID;
|
|
modifiedNeighbors[2] = res1X;
|
|
pParams.neighboursOutputBuffer[siblingID1] = modifiedNeighbors;
|
|
|
|
// Keep track of the parent
|
|
BisectorData modifiedBisector = cBisectorData;
|
|
modifiedBisector.indices[0] = cBisectorData.indices[0];
|
|
modifiedBisector.indices[1] = cBisectorData.indices[1];
|
|
modifiedBisector.indices[2] = cBisectorData.indices[2];
|
|
modifiedBisector.subdivisionPattern = cBisectorData.subdivisionPattern;
|
|
modifiedBisector.bisectorState = cBisectorData.bisectorState;
|
|
modifiedBisector.propagationID = currentID;
|
|
|
|
// Lower the element down the tree and update it's sibling
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[currentID] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = p_n1;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID0] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID1] = modifiedBisector;
|
|
|
|
// Mark this for propagation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.propagateBuffer[0], 1, targetLocation);
|
|
pParams.propagateBuffer[2 + targetLocation] = siblingID0;
|
|
debug.propagateLocation = targetLocation;
|
|
}
|
|
else if (currentSubdiv == LEFT_DOUBLE_SPLIT)
|
|
{
|
|
// Grab the bisector of the twin
|
|
uint res0X = INVALID_POINTER, res0Y = INVALID_POINTER;
|
|
evaluate_neighbors(currentID, p_n1, res0X, res0Y);
|
|
|
|
uint res1X = INVALID_POINTER, res1Y = INVALID_POINTER;
|
|
if (p_n2 != INVALID_POINTER)
|
|
evaluate_neighbors(currentID, p_n2, res1X, res1Y);
|
|
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[currentID] = 2 * baseHeapID;
|
|
pParams.heapIDBuffer[siblingID0] = 4 * baseHeapID + 2;
|
|
pParams.heapIDBuffer[siblingID1] = 4 * baseHeapID + 3;
|
|
|
|
uint4 modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID1;
|
|
modifiedNeighbors[1] = res1X;
|
|
modifiedNeighbors[2] = p_n0;
|
|
pParams.neighboursOutputBuffer[currentID] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID1;
|
|
modifiedNeighbors[1] = res0X;
|
|
modifiedNeighbors[2] = res1Y;
|
|
pParams.neighboursOutputBuffer[siblingID0] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = res0Y;
|
|
modifiedNeighbors[1] = siblingID0;
|
|
modifiedNeighbors[2] = currentID;
|
|
pParams.neighboursOutputBuffer[siblingID1] = modifiedNeighbors;
|
|
|
|
// Keep track of the parent
|
|
BisectorData modifiedBisector = cBisectorData;
|
|
modifiedBisector.indices[0] = cBisectorData.indices[0];
|
|
modifiedBisector.indices[1] = cBisectorData.indices[1];
|
|
modifiedBisector.indices[2] = cBisectorData.indices[2];
|
|
modifiedBisector.subdivisionPattern = cBisectorData.subdivisionPattern;
|
|
modifiedBisector.bisectorState = cBisectorData.bisectorState;
|
|
modifiedBisector.propagationID = currentID;
|
|
|
|
// Lower the element down the tree and update it's sibling
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[currentID] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID0] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID1] = modifiedBisector;
|
|
}
|
|
else if (currentSubdiv == TRIPLE_SPLIT)
|
|
{
|
|
// Grab the bisector of the twin
|
|
uint res0X = INVALID_POINTER, res0Y = INVALID_POINTER;
|
|
evaluate_neighbors(currentID, p_n0, res0X, res0Y);
|
|
|
|
uint res1X = INVALID_POINTER, res1Y = INVALID_POINTER;
|
|
evaluate_neighbors(currentID, p_n1, res1X, res1Y);
|
|
|
|
uint res2X = INVALID_POINTER, res2Y = INVALID_POINTER;
|
|
if (p_n2 != INVALID_POINTER)
|
|
evaluate_neighbors(currentID, p_n2, res2X, res2Y);
|
|
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[currentID] = 4 * baseHeapID;
|
|
pParams.heapIDBuffer[siblingID0] = 4 * baseHeapID + 2;
|
|
pParams.heapIDBuffer[siblingID1] = 4 * baseHeapID + 1;
|
|
pParams.heapIDBuffer[siblingID2] = 4 * baseHeapID + 3;
|
|
|
|
uint4 modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID1;
|
|
modifiedNeighbors[1] = res0X;
|
|
modifiedNeighbors[2] = siblingID2;
|
|
pParams.neighboursOutputBuffer[currentID] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = siblingID2;
|
|
modifiedNeighbors[1] = res1X;
|
|
modifiedNeighbors[2] = res2Y;
|
|
pParams.neighboursOutputBuffer[siblingID0] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = res0Y;
|
|
modifiedNeighbors[1] = currentID;
|
|
modifiedNeighbors[2] = res2X;
|
|
pParams.neighboursOutputBuffer[siblingID1] = modifiedNeighbors;
|
|
modifiedNeighbors[0] = res1Y;
|
|
modifiedNeighbors[1] = siblingID0;
|
|
modifiedNeighbors[2] = currentID;
|
|
pParams.neighboursOutputBuffer[siblingID2] = modifiedNeighbors;
|
|
|
|
// Keep track of the parent
|
|
BisectorData modifiedBisector = cBisectorData;
|
|
modifiedBisector.indices[0] = cBisectorData.indices[0];
|
|
modifiedBisector.indices[1] = cBisectorData.indices[1];
|
|
modifiedBisector.indices[2] = cBisectorData.indices[2];
|
|
modifiedBisector.subdivisionPattern = cBisectorData.subdivisionPattern;
|
|
modifiedBisector.bisectorState = cBisectorData.bisectorState;
|
|
modifiedBisector.propagationID = currentID;
|
|
|
|
// Lower the element down the tree and update it's sibling
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[currentID] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID0] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID1] = modifiedBisector;
|
|
|
|
// Create the sibling of the current element
|
|
modifiedBisector.problematicNeighbor = INVALID_POINTER;
|
|
modifiedBisector.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[siblingID2] = modifiedBisector;
|
|
}
|
|
|
|
// How many bits do we need to raise
|
|
uint numSiblings = countbits(currentSubdiv);
|
|
debug.numSiblings = numSiblings;
|
|
pParams.debugBuffer[dispatchID] = debug;
|
|
for (uint siblingIdx = 0; siblingIdx < numSiblings; ++siblingIdx)
|
|
{
|
|
set_bit_atomic_buffer(cBisectorData.indices[siblingIdx], true);
|
|
}
|
|
}
|
|
|
|
void PropagateBisectElement(uint currentID)
|
|
{
|
|
// Load the bisector data of the target triangle
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// neighbors of the parent
|
|
uint parentID = cBisectorData.propagationID;
|
|
uint problematicNeighbor = cBisectorData.problematicNeighbor;
|
|
|
|
// Read the neighbor that may have changed
|
|
BisectorData tBisectorData = pParams.bisectorDataBuffer[problematicNeighbor];
|
|
uint3 tNeighbors = pParams.neighboursBuffer[problematicNeighbor].xyz;
|
|
uint targetID = problematicNeighbor;
|
|
uint sibling1 = tBisectorData.indices[1];
|
|
|
|
if (tBisectorData.subdivisionPattern == NO_SPLIT)
|
|
{
|
|
if (tNeighbors[0] == parentID)
|
|
pParams.neighboursBuffer[targetID][0] = currentID;
|
|
if (tNeighbors[1] == parentID)
|
|
pParams.neighboursBuffer[targetID][1] = currentID;
|
|
if (tNeighbors[2] == parentID)
|
|
pParams.neighboursBuffer[targetID][2] = currentID;
|
|
}
|
|
else if (tBisectorData.subdivisionPattern == CENTER_SPLIT)
|
|
{
|
|
if (pParams.neighboursBuffer[targetID][2] == parentID)
|
|
pParams.neighboursBuffer[targetID][2] = currentID;
|
|
if (pParams.neighboursBuffer[tBisectorData.propagationID][2] == parentID)
|
|
pParams.neighboursBuffer[tBisectorData.propagationID][2] = currentID;
|
|
}
|
|
else if (tBisectorData.subdivisionPattern == RIGHT_DOUBLE_SPLIT)
|
|
{
|
|
pParams.neighboursBuffer[sibling1][2] = currentID;
|
|
}
|
|
else if (tBisectorData.subdivisionPattern == LEFT_DOUBLE_SPLIT)
|
|
{
|
|
pParams.neighboursBuffer[targetID][2] = currentID;
|
|
}
|
|
|
|
// Reset the problematic neighbor and the bisection state
|
|
pParams.bisectorDataBuffer[currentID].problematicNeighbor = INVALID_POINTER;
|
|
pParams.bisectorDataBuffer[currentID].bisectorState = UNCHANGED_ELEMENT;
|
|
}
|
|
|
|
void PrepareSimplifyElement(uint currentID)
|
|
{
|
|
// Get the bisector
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// Grab the current bisector
|
|
uint64_t cHeapID = pParams.heapIDBuffer[currentID];
|
|
|
|
// If this is not an even heap number it will be handeled by it's pair, the twin or the twin's pair
|
|
|
|
// Neighbors of this element
|
|
uint3 cNeighbors = pParams.neighboursBuffer[currentID].xyz;
|
|
|
|
// Evaluate the depth of this bisector
|
|
uint currentDepth = HeapIDDepth(cHeapID);
|
|
|
|
// Grab the pair neighbor (it has to exist)
|
|
uint pairID = cNeighbors[0];
|
|
uint64_t pHeapID = pParams.heapIDBuffer[pairID];
|
|
BisectorData pBisectorData = pParams.bisectorDataBuffer[pairID];
|
|
uint3 pNeighbors = pParams.neighboursBuffer[pairID].xyz;
|
|
|
|
// Evaluate the depth of the pair
|
|
uint pairDepth = HeapIDDepth(pHeapID);
|
|
|
|
// If they are not at the same depth or the pair is not to be simplified, we're done
|
|
if (pairDepth != currentDepth || pBisectorData.bisectorState != SIMPLIFY_ELEMENT)
|
|
return;
|
|
|
|
// We need to identify our twin pair
|
|
uint twinLowID = pNeighbors[0];
|
|
uint twinHighID = cNeighbors[1];
|
|
if (twinLowID != INVALID_POINTER)
|
|
{
|
|
// Grab the two bisectors
|
|
uint64_t twinLowHeapID = pParams.heapIDBuffer[twinLowID];
|
|
uint64_t twinHighHeapID = pParams.heapIDBuffer[twinHighID];
|
|
|
|
// The current bisector is not the smallest element of the neighborhood, he will be handeled by twinLowBisect if needed
|
|
if (cHeapID > twinLowHeapID)
|
|
return;
|
|
|
|
// Compute the depth of both neighbors
|
|
uint lowFacingDepth = HeapIDDepth(twinLowHeapID);
|
|
uint highFacingDepth = HeapIDDepth(twinHighHeapID);
|
|
|
|
// If all four elements are not on the same
|
|
if (lowFacingDepth != currentDepth || highFacingDepth != currentDepth)
|
|
return;
|
|
|
|
// Grab the two bisectors
|
|
BisectorData twinLowBisectData = pParams.bisectorDataBuffer[twinLowID];
|
|
BisectorData twinHighBisectData = pParams.bisectorDataBuffer[twinHighID];
|
|
|
|
// This element should not be doing the simplifications if:
|
|
// - One of the four elements doesn't have the same depth
|
|
// - One of the four elements isn't flagged for simplification
|
|
if (twinLowBisectData.bisectorState != SIMPLIFY_ELEMENT
|
|
|| twinHighBisectData.bisectorState != SIMPLIFY_ELEMENT)
|
|
return;
|
|
}
|
|
|
|
// This element will simplify itself, it's pair and possibilty it's twin and twin-pair.
|
|
uint bisectorSlot;
|
|
InterlockedAdd(pParams.simplifyBuffer[0], 1, bisectorSlot);
|
|
|
|
// Log the bisector ID
|
|
pParams.simplifyBuffer[1 + bisectorSlot] = currentID;
|
|
}
|
|
|
|
void SimplifyElement(uint currentID)
|
|
{
|
|
// Grab the current bisector
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
uint3 cNeighbors = pParams.neighboursBuffer[currentID].xyz;
|
|
|
|
// Grab the pair neighbor (it has to exist)
|
|
uint pairID = cNeighbors[0];
|
|
BisectorData pBisectorData = pParams.bisectorDataBuffer[pairID];
|
|
uint3 pNeighbors = pParams.neighboursBuffer[pairID].xyz;
|
|
|
|
// We need to indentify our twin pair
|
|
uint twinLowID = pNeighbors[0];
|
|
uint twinHighID = cNeighbors[1];
|
|
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[currentID] = pParams.heapIDBuffer[currentID] / 2;
|
|
pParams.heapIDBuffer[pairID] = 0;
|
|
|
|
// All conditions are met for us to simplify these triangles
|
|
uint3 newNeighbors;
|
|
newNeighbors[0] = cNeighbors[2];
|
|
newNeighbors[1] = pNeighbors[2];
|
|
newNeighbors[2] = twinLowID;
|
|
pParams.neighboursBuffer[currentID] = uint4(newNeighbors, 0);
|
|
|
|
// Update the bisector data
|
|
cBisectorData.propagationID = pairID;
|
|
cBisectorData.problematicNeighbor = pNeighbors[2];
|
|
cBisectorData.bisectorState = MERGED_ELEMENT;
|
|
cBisectorData.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[currentID] = cBisectorData;
|
|
|
|
// Mark this for propagation
|
|
if (cBisectorData.problematicNeighbor != INVALID_POINTER)
|
|
{
|
|
// Mark this for propagation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.propagateBuffer[1], 1, targetLocation);
|
|
pParams.propagateBuffer[2 + targetLocation] = currentID;
|
|
}
|
|
|
|
// Clear the pair's heap for identification
|
|
pBisectorData.bisectorState = MERGED_ELEMENT;
|
|
pBisectorData.flags = 0;
|
|
pParams.bisectorDataBuffer[pairID] = pBisectorData;
|
|
|
|
// Don't forget to free the bit
|
|
set_bit_atomic_buffer(pairID, false);
|
|
|
|
// If there was a facing pair, simplify it aswell
|
|
if (twinLowID != INVALID_POINTER)
|
|
{
|
|
// Set the heap IDs
|
|
pParams.heapIDBuffer[twinLowID] = pParams.heapIDBuffer[twinLowID] / 2;
|
|
pParams.heapIDBuffer[twinHighID] = 0;
|
|
|
|
// Read both bisectors
|
|
BisectorData lowFacingBst = pParams.bisectorDataBuffer[twinLowID];
|
|
uint3 lfNeighbors = pParams.neighboursBuffer[twinLowID].xyz;
|
|
BisectorData highFacingBst = pParams.bisectorDataBuffer[twinHighID];
|
|
uint3 hfNeighbors = pParams.neighboursBuffer[twinHighID].xyz;
|
|
|
|
// Update the lowest ID
|
|
newNeighbors[0] = lfNeighbors[2];
|
|
newNeighbors[1] = hfNeighbors[2];
|
|
newNeighbors[2] = currentID;
|
|
pParams.neighboursBuffer[twinLowID] = uint4(newNeighbors, 0);
|
|
|
|
// Update the twin bisector data
|
|
lowFacingBst.propagationID = twinHighID;
|
|
lowFacingBst.problematicNeighbor = hfNeighbors[2];
|
|
lowFacingBst.bisectorState = MERGED_ELEMENT;
|
|
lowFacingBst.flags = (VISIBLE_BISECTOR | MODIFIED_BISECTOR);
|
|
pParams.bisectorDataBuffer[twinLowID] = lowFacingBst;
|
|
|
|
if (lowFacingBst.problematicNeighbor != INVALID_POINTER)
|
|
{
|
|
// Mark this for propagation
|
|
uint targetLocation = 0;
|
|
InterlockedAdd(pParams.propagateBuffer[1], 1, targetLocation);
|
|
pParams.propagateBuffer[2 + targetLocation] = twinLowID;
|
|
}
|
|
|
|
// Clear the pair's heap for identification
|
|
highFacingBst.bisectorState = MERGED_ELEMENT;
|
|
highFacingBst.flags = 0;
|
|
pParams.bisectorDataBuffer[twinHighID] = highFacingBst;
|
|
|
|
// Don't forget to free the bit
|
|
set_bit_atomic_buffer(twinHighID, false);
|
|
}
|
|
}
|
|
|
|
void PropagateElementSimplify(uint currentID)
|
|
{
|
|
// Load the bisector data of the target element
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// Id of the element before the simplification
|
|
uint deletedPair = cBisectorData.propagationID;
|
|
|
|
// neighbors of the parent
|
|
uint neighborID = cBisectorData.problematicNeighbor;
|
|
|
|
// Read the neighbor that may have changed
|
|
BisectorData nBisectorData = pParams.bisectorDataBuffer[neighborID];
|
|
uint3 nNeighbors = pParams.neighboursBuffer[neighborID].xyz;
|
|
|
|
// The neighbor has not changed, so we just need to make it point on currentID instead of the pair that was deleted
|
|
if (nBisectorData.bisectorState != MERGED_ELEMENT)
|
|
{
|
|
for (uint i = 0; i < 3; ++i)
|
|
{
|
|
if (nNeighbors[i] == deletedPair)
|
|
pParams.neighboursBuffer[neighborID][i] = currentID;
|
|
}
|
|
}
|
|
// The neighbor has had a simplification, so we need to update a different neighbor based on if it went up one depth in the tree or was deleted.
|
|
else if (nBisectorData.bisectorState == MERGED_ELEMENT)
|
|
{
|
|
// He still exist, but was simplified
|
|
if (pParams.heapIDBuffer[neighborID] != 0)
|
|
{
|
|
for (uint i = 0; i < 3; ++i)
|
|
{
|
|
if (nNeighbors[i] == deletedPair)
|
|
pParams.neighboursBuffer[neighborID][i] = currentID;
|
|
}
|
|
}
|
|
// He is gone, we need to update his pair instead of him.
|
|
else
|
|
{
|
|
uint neighborPair = nNeighbors[1];
|
|
for (uint i = 0; i < 3; ++i)
|
|
{
|
|
if (pParams.neighboursBuffer[neighborPair][i] == deletedPair)
|
|
pParams.neighboursBuffer[neighborPair][i] = currentID;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Reset the problematic neighbor
|
|
pParams.bisectorDataBuffer[currentID].problematicNeighbor = INVALID_POINTER;
|
|
}
|
|
|
|
void BisectorElementIndexation(uint currentID)
|
|
{
|
|
// Grab the current heap ID
|
|
uint64_t cHeapID = pParams.heapIDBuffer[currentID];
|
|
|
|
// Deallocated element, we don't care
|
|
if (cHeapID == 0)
|
|
return;
|
|
|
|
// Reserve a slot for this bisector
|
|
uint bisectorSlot;
|
|
InterlockedAdd(pParams.indirectDrawBuffer[0], 3, bisectorSlot);
|
|
|
|
// Keep track of it's global ID
|
|
pParams.bisectorIndicesBuffer[bisectorSlot / 3] = currentID;
|
|
|
|
// Load the bisector data of the target element
|
|
BisectorData cBisectorData = pParams.bisectorDataBuffer[currentID];
|
|
|
|
// Is it visible?
|
|
if ((cBisectorData.flags & VISIBLE_BISECTOR) == 0)
|
|
return;
|
|
|
|
// Reserve a slot for this visible bisector
|
|
InterlockedAdd(pParams.indirectDrawBuffer[4], 3, bisectorSlot);
|
|
|
|
// Keep track of it's global ID
|
|
pParams.visibleBisectorIndices[bisectorSlot / 3] = currentID;
|
|
|
|
// Is it visible?
|
|
if ((cBisectorData.flags & MODIFIED_BISECTOR) == 0)
|
|
return;
|
|
|
|
// Reserve a slot for this visible bisector
|
|
InterlockedAdd(pParams.indirectDrawBuffer[8], 4, bisectorSlot);
|
|
|
|
// Keep track of it's global ID
|
|
pParams.modifiedBisectorIndices[bisectorSlot / 4] = currentID;
|
|
}
|
|
|
|
void ValidateBisector(uint currentID)
|
|
{
|
|
// Grab the current heap ID
|
|
uint64_t cHeapID = pParams.heapIDBuffer[currentID];
|
|
|
|
// Deallocated element, we don't care
|
|
if (cHeapID == 0)
|
|
return;
|
|
|
|
// Load the bisector data of the target element
|
|
uint4 cNeighbors = pParams.neighboursBuffer[currentID];
|
|
uint4 tempnNeighbours[3];
|
|
|
|
bool failed = false;
|
|
uint targetNeighbor = INVALID_POINTER;
|
|
uint targetIdx = INVALID_POINTER;
|
|
for (uint i = 0; i < 3; ++i)
|
|
{
|
|
uint neighborID = cNeighbors[i];
|
|
if (neighborID != INVALID_POINTER)
|
|
{
|
|
bool found = false;
|
|
uint4 nNeighbors = pParams.neighboursBuffer[neighborID];
|
|
tempnNeighbours[i] = nNeighbors;
|
|
for (uint j = 0; j < 3; ++j)
|
|
{
|
|
if (nNeighbors[j] == currentID)
|
|
found = true;
|
|
}
|
|
if (!found)
|
|
{
|
|
failed = true;
|
|
targetNeighbor = neighborID;
|
|
targetIdx = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Notify the failure
|
|
if (failed)
|
|
{
|
|
uint prevValue;
|
|
InterlockedAdd(pParams.validationBuffer[0], 1, prevValue);
|
|
}
|
|
} |