private void growBranch(Random rand, int depth, BlockPos pos, float dx, float dy, float dz, float angleVerStart, float angleHorStart, float curWidth, float dieAt, float trunkWidthLoss, bool wideTrunk)
{
if (depth > 30)
{
Console.WriteLine("TreeGen.growBranch() aborted, too many branches!"); return;
}
TreeGenBranch branch = branchesByDepth[Math.Min(depth, branchesByDepth.Count - 1)];
short[] outline = forestFloor.GetOutline();
float widthloss = depth == 0 ? trunkWidthLoss : branch.WidthLoss(rand);
float widthlossCurve = branch.widthlossCurve;
float branchspacing = branch.branchSpacing.nextFloat(1, rand);
float branchstart = branch.branchStart.nextFloat(1, rand);
float branchQuantityStart = branch.branchQuantity.nextFloat(1, rand);
float branchWidthMulitplierStart = branch.branchWidthMultiplier.nextFloat(1, rand);
float reldistance, lastreldistance = 0;
float totaldistance = curWidth / widthloss;
int iteration = 0;
float sequencesPerIteration = 1f / (curWidth / widthloss);
float ddrag, angleVer, angleHor;
// we want to place around the trunk/branch => offset the coordinates when growing stuff from the base
float trunkOffsetX, trunkOffsetZ;
BlockPos currentPos = new BlockPos();
float branchQuantity, branchWidth;
float sinAngleVer, cosAnglerHor, sinAngleHor;
float currentSequence;
LCGRandom lcgrand = lcgrandTL.Value;
while (curWidth > 0 && iteration++ < 5000)
{
curWidth -= widthloss;
if (widthlossCurve + curWidth / 20 < 1f)
{
widthloss *= (widthlossCurve + curWidth / 20);
}
currentSequence = sequencesPerIteration * (iteration - 1);
if (curWidth < dieAt)
{
break;
}
angleVer = branch.angleVertEvolve.nextFloat(angleVerStart, currentSequence);
angleHor = branch.angleHoriEvolve.nextFloat(angleHorStart, currentSequence);
sinAngleVer = GameMath.FastSin(angleVer);
cosAnglerHor = GameMath.FastCos(angleHor);
sinAngleHor = GameMath.FastSin(angleHor);
trunkOffsetX = Math.Max(-0.5f, Math.Min(0.5f, 0.7f * sinAngleVer * cosAnglerHor));
trunkOffsetZ = Math.Max(-0.5f, Math.Min(0.5f, 0.7f * sinAngleVer * sinAngleHor));
ddrag = branch.gravityDrag * (float)Math.Sqrt(dx * dx + dz * dz);
dx += sinAngleVer * cosAnglerHor / Math.Max(1, Math.Abs(ddrag));
dy += Math.Min(1, Math.Max(-1, GameMath.FastCos(angleVer) - ddrag));
dz += sinAngleVer * sinAngleHor / Math.Max(1, Math.Abs(ddrag));
int blockId = branch.getBlockId(curWidth, config.treeBlocks, this);
if (blockId == 0)
{
return;
}
currentPos.Set(pos.X + dx, pos.Y + dy, pos.Z + dz);
PlaceResumeState state = getPlaceResumeState(currentPos, blockId, wideTrunk);
if (state == PlaceResumeState.CanPlace)
{
api.SetBlock(blockId, currentPos);
// Update the canopy outline of the tree for this block position
int idz = (int)(dz + 16);
int idx = (int)(dx + 16);
if (idz > 1 && idz < 31 && idx > 1 && idx < 31)
{
int canopyIndex = idz * 33 + idx;
outline[canopyIndex - 68]++;
outline[canopyIndex - 67]++; //bias canopy shading towards the North (- z direction) for sun effects
outline[canopyIndex - 66]++;
outline[canopyIndex - 65]++;
outline[canopyIndex - 64]++;
outline[canopyIndex - 35]++;
outline[canopyIndex - 34] += 2;
outline[canopyIndex - 33] += 2;
outline[canopyIndex - 32] += 2;
outline[canopyIndex - 31]++;
outline[canopyIndex - 2]++;
outline[canopyIndex - 1] += 2;
outline[canopyIndex + 0] += 3;
outline[canopyIndex + 1] += 2;
outline[canopyIndex + 2]++;
outline[canopyIndex + 33]++;
}
if (vineGrowthChance > 0 && rand.NextDouble() < vineGrowthChance && config.treeBlocks.vinesBlock != null)
{
BlockFacing facing = BlockFacing.HORIZONTALS[rand.Next(4)];
BlockPos vinePos = currentPos.AddCopy(facing);
float cnt = 1 + rand.Next(11) * (vineGrowthChance + 0.2f);
while (api.GetBlockId(vinePos) == 0 && cnt-- > 0)
{
Block block = config.treeBlocks.vinesBlock;
if (cnt <= 0 && config.treeBlocks.vinesEndBlock != null)
{
block = config.treeBlocks.vinesEndBlock;
}
block.TryPlaceBlockForWorldGen(api, vinePos, facing, lcgrand);
vinePos.Down();
}
}
}
else
{
if (state == PlaceResumeState.Stop)
{
return;
}
}
reldistance = (float)Math.Sqrt(dx * dx + dy * dy + dz * dz) / totaldistance;
if (reldistance < branchstart)
{
continue;
}
if (reldistance > lastreldistance + branchspacing * (1f - reldistance))
{
branchspacing = branch.branchSpacing.nextFloat(1, rand);
lastreldistance = reldistance;
if (branch.branchQuantityEvolve != null)
{
branchQuantity = branch.branchQuantityEvolve.nextFloat(branchQuantityStart, currentSequence);
}
else
{
branchQuantity = branch.branchQuantity.nextFloat(1, rand);
}
float prevHorAngle = 0f;
float horAngle;
float minHorangleDist = Math.Min(GameMath.PI / 5, branch.branchHorizontalAngle.var / 5);
bool first = true;
while (branchQuantity-- > 0)
{
if (branchQuantity < 1 && rand.NextDouble() < branchQuantity)
{
break;
}
curWidth *= branch.branchWidthLossMul;
horAngle = angleHor + branch.branchHorizontalAngle.nextFloat(1, rand);
int tries = 10;
while (!first && Math.Abs(horAngle - prevHorAngle) < minHorangleDist && tries-- > 0)
{
float newAngle = angleHor + branch.branchHorizontalAngle.nextFloat(1, rand);
if (Math.Abs(horAngle - prevHorAngle) < Math.Abs(newAngle - prevHorAngle))
{
horAngle = newAngle;
}
}
if (branch.branchWidthMultiplierEvolve != null)
{
branchWidth = curWidth * branch.branchWidthMultiplierEvolve.nextFloat(branchWidthMulitplierStart, currentSequence);
}
else
{
branchWidth = branch.branchWidthMultiplier.nextFloat(curWidth, rand);
}
growBranch(
rand,
depth + 1,
pos, dx + trunkOffsetX, dy, dz + trunkOffsetZ,
branch.branchVerticalAngle.nextFloat(1, rand),
horAngle,
branchWidth,
Math.Max(0, branch.dieAt.nextFloat(1, rand)),
trunkWidthLoss, false
);
first = false;
prevHorAngle = angleHor + horAngle;
}
}
}
}
private void growBranch(Random rand, int depth, BlockPos pos, float dx, float dy, float dz, float angleVerStart, float angleHorStart, float curWidth, float dieAt)
{
if (depth > 30)
{
Console.WriteLine("TreeGen.growBranch() aborted, too many branches!"); return;
}
TreeGenBranch branch = branchesByDepth[Math.Min(depth, branchesByDepth.Count - 1)];
float branchspacing = branch.branchSpacing.nextFloat(1, rand);
float branchstart = branch.branchStart.nextFloat(1, rand);
float branchQuantityStart = branch.branchQuantity.nextFloat(1, rand);
float branchWidthMulitplierStart = branch.branchWidthMultiplier.nextFloat(1, rand);
float reldistance = 0, lastreldistance = 0;
float totaldistance = curWidth / branch.widthloss;
int iteration = 0;
float sequencesPerIteration = 1f / (curWidth / branch.widthloss);
float ddrag = 0, angleVer = 0, angleHor = 0;
// we want to place around the trunk/branch => offset the coordinates when growing stuff from the base
float trunkOffsetX = 0, trunkOffsetZ = 0, trunkOffsetY = 0;
BlockPos currentPos;
float branchQuantity, branchWidth;
float sinAngleVer, cosAnglerHor, sinAngleHor;
float currentSequence;
LCGRandom lcgrand = lcgrandTL.Value;
while (curWidth > 0 && iteration++ < 5000)
{
curWidth -= branch.widthloss;
currentSequence = sequencesPerIteration * (iteration - 1);
if (curWidth < dieAt)
{
break;
}
angleVer = branch.angleVertEvolve.nextFloat(angleVerStart, currentSequence);
angleHor = branch.angleHoriEvolve.nextFloat(angleHorStart, currentSequence);
sinAngleVer = GameMath.FastSin(angleVer);
cosAnglerHor = GameMath.FastCos(angleHor);
sinAngleHor = GameMath.FastSin(angleHor);
trunkOffsetX = Math.Max(-0.5f, Math.Min(0.5f, 0.7f * sinAngleVer * cosAnglerHor));
trunkOffsetY = Math.Max(-0.5f, Math.Min(0.5f, 0.7f * cosAnglerHor)) + 0.5f;
trunkOffsetZ = Math.Max(-0.5f, Math.Min(0.5f, 0.7f * sinAngleVer * sinAngleHor));
ddrag = branch.gravityDrag * (float)Math.Sqrt(dx * dx + dz * dz);
dx += sinAngleVer * cosAnglerHor / Math.Max(1, Math.Abs(ddrag));
dy += Math.Min(1, Math.Max(-1, GameMath.FastCos(angleVer) - ddrag));
dz += sinAngleVer * sinAngleHor / Math.Max(1, Math.Abs(ddrag));
int blockId = getBlockId(curWidth);
if (blockId == 0)
{
return;
}
currentPos = pos.AddCopy(dx, dy, dz);
PlaceResumeState state = getPlaceResumeState(currentPos, blockId);
if (state == PlaceResumeState.CanPlace)
{
api.SetBlock(blockId, currentPos);
if (vineGrowthChance > 0 && rand.NextDouble() < vineGrowthChance && config.treeBlocks.vinesBlock != null)
{
BlockFacing facing = BlockFacing.HORIZONTALS[rand.Next(4)];
BlockPos vinePos = currentPos.AddCopy(facing);
float cnt = 1 + rand.Next(11) * (vineGrowthChance + 0.2f);
while (api.GetBlockId(vinePos) == 0 && cnt-- > 0)
{
Block block = config.treeBlocks.vinesBlock;
if (cnt <= 0 && config.treeBlocks.vinesEndBlock != null)
{
block = config.treeBlocks.vinesEndBlock;
}
block.TryPlaceBlockForWorldGen(api, vinePos, facing, lcgrand);
vinePos.Down();
}
}
}
else
{
if (state == PlaceResumeState.Stop)
{
return;
}
}
reldistance = (float)Math.Sqrt(dx * dx + dy * dy + dz * dz) / totaldistance;
if (reldistance < branchstart)
{
continue;
}
if (reldistance > lastreldistance + branchspacing * (1f - reldistance))
{
branchspacing = branch.branchSpacing.nextFloat(1, rand);
lastreldistance = reldistance;
if (branch.branchQuantityEvolve != null)
{
branchQuantity = branch.branchQuantityEvolve.nextFloat(branchQuantityStart, currentSequence);
}
else
{
branchQuantity = branch.branchQuantity.nextFloat(1, rand);
}
float prevHorAngle = 0f;
float horAngle;
float minHorangleDist = Math.Min(GameMath.PI / 10, branch.branchHorizontalAngle.var / 5);
bool first = true;
while (branchQuantity-- > 0)
{
if (branchQuantity < 1 && rand.NextDouble() < branchQuantity)
{
break;
}
curWidth *= branch.branchWidthLossMul;
horAngle = branch.branchHorizontalAngle.nextFloat(1, rand);
int tries = 5;
while (!first && Math.Abs(horAngle - prevHorAngle) < minHorangleDist && tries-- > 0)
{
horAngle = branch.branchHorizontalAngle.nextFloat(1, rand);
}
if (branch.branchWidthMultiplierEvolve != null)
{
branchWidth = curWidth * branch.branchWidthMultiplierEvolve.nextFloat(branchWidthMulitplierStart, currentSequence);
}
else
{
branchWidth = branch.branchWidthMultiplier.nextFloat(curWidth, rand);
}
growBranch(
rand,
depth + 1,
pos, dx + trunkOffsetX, dy, dz + trunkOffsetZ,
branch.branchVerticalAngle.nextFloat(1, rand),
angleHor + branch.branchHorizontalAngle.nextFloat(1, rand),
branchWidth,
Math.Max(0, branch.dieAt.nextFloat(1, rand))
);
first = false;
prevHorAngle = horAngle;
}
}
}
}
