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More work on experimental occlusion culling.

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This commit is contained in:
UnknownShadow200 2015-10-04 20:18:07 +11:00
parent 7a87906dad
commit d0445ba54d
4 changed files with 141 additions and 79 deletions
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137
ClassicalSharp/Map/ChunkMeshBuilder.FloodFill.cs
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@ -5,88 +5,85 @@ namespace ClassicalSharp {
public partial class ChunkMeshBuilder {
unsafe void FloodFill( byte* chunkPtr, int startIndex ) {
int* stack = stackalloc int[chunkSize3];
ushort* didFlags = stackalloc ushort[chunkSize2];
OpenTK.MemUtils.memset( (IntPtr)didFlags, 0x00, 0, chunkSize2 * 2 );
unsafe int ComputeOcclusion() {
int* didFlags = stackalloc int[chunkSize2];
OpenTK.MemUtils.memset( (IntPtr)didFlags, 0x00, 0, chunkSize2 * sizeof( int ) );
int* stack = stackalloc int[chunkSize3 * 4];
int i = 0;
bool solidX = true, solidY = true, solidZ = true;
for( int y = 0; y < 16; y++ ) {
for( int z = 0; z < 16; z++ ) {
int flagIndex = (y << 4) | z;
int chunkIndex = (y + 1) * extChunkSize2 + (z + 1) * extChunkSize + (0 + 1);
for( int x = 0; x < 16; x++ ) {
byte block = chunk[chunkIndex];
if( info.IsOpaque[block] ) {
didFlags[flagIndex] |= (1 << x);
} else {
FloodFill( didFlags, stack, i, ref solidX, ref solidY, ref solidZ );
}
i++;
chunkIndex++;
}
}
}
return (solidX ? 0x1 : 0) | (solidZ ? 0x2 : 0) | (solidY ? 0x4 : 0);
}
unsafe void FloodFill( int* didFlags, int* stack, int startIndex,
ref bool solidX, ref bool solidY, ref bool solidZ ) {
int index = 0;
stack[index++] = startIndex;
bool tX0 = false, tX1 = false, tY0 = false,
tY1 = false, tZ0 = false, tZ1 = false;
while( index > 0 ) {
int bIndex = stack[index--];
int bIndex = stack[--index];
int x = (bIndex & 0x0F);
int z = ((bIndex >> 4) & 0x0F );
int y = ((bIndex >> 8) & 0x0F);
int flagIndex = (y << 4) | z;
didFlags[flagIndex] |= (1 << x);
int chunkIndex = (y + 1) * extChunkSize2 + (z + 1) * extChunkSize + (x + 1);
byte block = chunkPtr[chunkIndex];
byte block = chunk[chunkIndex];
if( !info.IsOpaque[block] ) {
if( x < 15 ) stack[index++] = (y << 8) | (z << 4) | (x + 1);
if( x > 0 ) stack[index++] = (y << 8) | (z << 4) | (x - 1);
if( z < 15 ) stack[index++] = (y << 8) | ((z + 1) << 4) | x;
if( z > 0 ) stack[index++] = (y << 8) | ((z - 1) << 4) | x;
if( y < 15 ) stack[index++] = ((y + 1) << 8) | (z << 4) | x;
if( y > 0 ) stack[index++] = ((y - 1) << 8) | (z << 4) | x;
if( x == 0 )
tX0 = true;
else if( (didFlags[flagIndex] & (1 << (x - 1))) == 0 )
stack[index++] = (y << 8) | (z << 4) | (x - 1);
if( x == 15 )
tX1 = true;
else if( (didFlags[flagIndex] & (1 << (x + 1))) == 0 )
stack[index++] = (y << 8) | (z << 4) | (x + 1);
if( z == 0 )
tZ0 = true;
else if( (didFlags[flagIndex - 1] & (1 << x)) == 0 )
stack[index++] = (y << 8) | ((z - 1) << 4) | x;
if( z == 15 )
tZ1 = true;
else if( (didFlags[flagIndex + 1] & (1 << x)) == 0 )
stack[index++] = (y << 8) | ((z + 1) << 4) | x;
if( y == 0 )
tY0 = true;
else if( (didFlags[flagIndex - 16] & (1 << x)) == 0 )
stack[index++] = ((y - 1) << 8) | (z << 4) | x;
if( y == 15 )
tY1 = true;
else if( (didFlags[flagIndex + 16] & (1 << x)) == 0 )
stack[index++] = ((y + 1) << 8) | (z << 4) | x;
}
}
if( tX0 && tX1 ) solidX = false;
if( tY0 && tY1 ) solidY = false;
if( tZ0 && tZ1 ) solidZ = false;
}
// TODO: Move to maprenderer
/*void SimpleOcclusionCulling() {
Vector3 p = game.LocalPlayer.EyePosition;
for( int i = 0; i < chunks.Length; i++ ) {
ChunkInfo chunk = chunks[i];
chunk.Visible = true;
int cx = chunk.CentreX >> 4;
int cy = chunk.CentreY >> 4;
int cz = chunk.CentreZ >> 4;
int x1 = chunk.CentreX - 8, x2 = chunk.CentreX + 8;
int y1 = chunk.CentreY - 8, y2 = chunk.CentreY + 8;
int z1 = chunk.CentreZ - 8, z2 = chunk.CentreZ + 8;
float minDist = float.PositiveInfinity;
int xOffset = -1, yOffset = 0, zOffset = 0;
// TODO: two axes with same distance
minDist = DistToRecSquared( p, x1, y1, z1, x1, y2, z2 ); // left
float rightDist = DistToRecSquared( p, x2, y1, z1, x2, y2, z2 );
if( rightDist < minDist ) {
minDist = rightDist; xOffset = 1;
}
float frontDist = DistToRecSquared( p, x1, y1, z1, x2, y2, z1 );
if( frontDist < minDist ) {
minDist = frontDist; xOffset = 0; zOffset = -1;
}
float backDist = DistToRecSquared( p, x1, y1, z2, x2, y2, z2 );
if( backDist < minDist ) {
minDist = backDist; xOffset = 0; zOffset = 1;
}
float bottomDist = DistToRecSquared( p, x1, y1, z1, x2, y1, z2 );
if( bottomDist < minDist ) {
minDist = bottomDist; xOffset = 0; zOffset = 0; yOffset = -1;
}
float topDist = DistToRecSquared( p, x1, y2, z1, x2, y2, z2 );
if( topDist < minDist ) {
minDist = topDist; xOffset = 0; zOffset = 0; yOffset = -1;
}
if( (cx + xOffset) >= 0 && (cy + yOffset) >= 0 && (cz + zOffset) >= 0 &&
(cx + xOffset) < width && (cy + yOffset) < height && (cz + zOffset) < length ) {
chunk.Visible = false;
}
}
chunks[0].Visible = true;
}
static float DistToRecSquared( Vector3 p, int x1, int y1, int z1, int x2, int y2, int z2 ) {
float dx = Math.Max( x1 - p.X, Math.Max( 0, p.X - x2 ) );
float dy = Math.Max( y1 - p.Y, Math.Max( 0, p.Y - y2 ) );
float dz = Math.Max( z1 - p.Z, Math.Max( 0, p.Z - z2 ) );
return dx * dx + dy * dy + dz * dz;
}*/
}
}

6
ClassicalSharp/Map/ChunkMeshBuilder.cs
View File

@ -101,7 +101,8 @@ namespace ClassicalSharp {
return allAir || allSolid;
}
public void GetDrawInfo( int x, int y, int z, ref ChunkPartInfo[] normalParts, ref ChunkPartInfo[] translucentParts ) {
public void GetDrawInfo( int x, int y, int z, ref ChunkPartInfo[] normalParts,
ref ChunkPartInfo[] translucentParts, ref byte occlusionFlags ) {
if( !BuildChunk( x, y, z ) )
return;
@ -109,6 +110,8 @@ namespace ClassicalSharp {
SetPartInfo( drawInfoNormal[i], i, ref normalParts );
SetPartInfo( drawInfoTranslucent[i], i, ref translucentParts );
}
if( normalParts != null || translucentParts != null )
occlusionFlags = 0;//(byte)ComputeOcclusion();
}
public void RenderTile( int chunkIndex, int xx, int yy, int zz, int x, int y, int z ) {
@ -156,6 +159,7 @@ namespace ClassicalSharp {
int xMax = Math.Min( width, x1 + chunkSize );
int yMax = Math.Min( height, y1 + chunkSize );
int zMax = Math.Min( length, z1 + chunkSize );
for( int y = y1, yy = 0; y < yMax; y++, yy++ ) {
for( int z = z1, zz = 0; z < zMax; z++, zz++ ) {

71
ClassicalSharp/Rendering/MapRenderer.cs
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@ -14,6 +14,7 @@ namespace ClassicalSharp {
public bool Visible = true;
public bool Empty = false;
public bool DrawLeft, DrawRight, DrawFront, DrawBack, DrawBottom, DrawTop;
public byte OcclusionFlags;
public ChunkPartInfo[] NormalParts;
public ChunkPartInfo[] TranslucentParts;
@ -130,6 +131,7 @@ namespace ClassicalSharp {
void DeleteChunk( ChunkInfo info ) {
info.Empty = false;
info.OcclusionFlags = 0;
DeleteData( ref info.NormalParts );
DeleteData( ref info.TranslucentParts );
}
@ -272,10 +274,10 @@ namespace ClassicalSharp {
if( inRange && chunksUpdatedThisFrame < chunksTarget ) {
game.ChunkUpdates++;
builder.GetDrawInfo( info.CentreX - 8, info.CentreY - 8, info.CentreZ - 8,
ref info.NormalParts, ref info.TranslucentParts );
if( info.NormalParts == null && info.TranslucentParts == null ) {
ref info.NormalParts, ref info.TranslucentParts, ref info.OcclusionFlags );
if( info.NormalParts == null && info.TranslucentParts == null )
info.Empty = true;
}
chunksUpdatedThisFrame++;
}
}
@ -329,5 +331,68 @@ namespace ClassicalSharp {
api.AlphaBlending = false;
api.Texturing = false;
}
void SimpleOcclusionCulling() { // TODO: broken
Vector3 p = game.LocalPlayer.EyePosition;
for( int i = 0; i < chunks.Length; i++ ) {
ChunkInfo chunk = chunks[i];
chunk.Visible = true;
int cx = chunk.CentreX >> 4;
int cy = chunk.CentreY >> 4;
int cz = chunk.CentreZ >> 4;
int x1 = chunk.CentreX - 8, x2 = chunk.CentreX + 8;
int y1 = chunk.CentreY - 8, y2 = chunk.CentreY + 8;
int z1 = chunk.CentreZ - 8, z2 = chunk.CentreZ + 8;
float minDist = float.PositiveInfinity;
int xOffset = -1, yOffset = 0, zOffset = 0;
int flags = 0x1;
// TODO: two axes with same distance
minDist = DistToRecSquared( p, x1, y1, z1, x1, y2, z2 ); // left
float rightDist = DistToRecSquared( p, x2, y1, z1, x2, y2, z2 );
if( rightDist < minDist ) {
minDist = rightDist; xOffset = 1;
}
float frontDist = DistToRecSquared( p, x1, y1, z1, x2, y2, z1 );
if( frontDist < minDist ) {
minDist = frontDist; xOffset = 0; zOffset = -1; flags = 2;
}
float backDist = DistToRecSquared( p, x1, y1, z2, x2, y2, z2 );
if( backDist < minDist ) {
minDist = backDist; xOffset = 0; zOffset = 1; flags = 2;
}
float bottomDist = DistToRecSquared( p, x1, y1, z1, x2, y1, z2 );
if( bottomDist < minDist ) {
minDist = bottomDist; xOffset = 0; zOffset = 0; yOffset = -1; flags = 4;
}
float topDist = DistToRecSquared( p, x1, y2, z1, x2, y2, z2 );
if( topDist < minDist ) {
minDist = topDist; xOffset = 0; zOffset = 0; yOffset = -1; flags = 4;
}
if( (cx + xOffset) >= 0 && (cy + yOffset) >= 0 && (cz + zOffset) >= 0 &&
(cx + xOffset) < chunksX && (cy + yOffset) < chunksY && (cz + zOffset) < chunksZ ) {
cx += xOffset; cy += yOffset; cz += zOffset;
ChunkInfo neighbour = unsortedChunks[cx + chunksX * (cy + cz * chunksY)];
if( (neighbour.OcclusionFlags & flags) != 0 ) {
Console.WriteLine( "HIDE" );
chunks[i].Visible = false;
}
}
}
chunks[0].Visible = true;
}
static float DistToRecSquared( Vector3 p, int x1, int y1, int z1, int x2, int y2, int z2 ) {
float dx = Math.Max( x1 - p.X, Math.Max( 0, p.X - x2 ) );
float dy = Math.Max( y1 - p.Y, Math.Max( 0, p.Y - y2 ) );
float dz = Math.Max( z1 - p.Z, Math.Max( 0, p.Z - z2 ) );
return dx * dx + dy * dy + dz * dz;
}
}
}

4
todo.txt
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@ -1,4 +0,0 @@
* Texture animations.
* Test that Mojang Accounts work properly.
* Fix issues with framerate limiting not working properly on same cards.
(will require 'sleeping'of main thread)