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authormadmaxoft <github@xoft.cz>2014-07-27 16:05:45 +0200
committermadmaxoft <github@xoft.cz>2014-07-27 16:05:45 +0200
commit960ab982b96d23485b6c42df1ed2b08a251a0c22 (patch)
tree5a455c125d880a6e4cce167714cfc5b6a4000d6f /src/Generating/RoughRavines.cpp
parentRoughRavines: More settings - size, width, roughness (diff)
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Diffstat (limited to '')
-rw-r--r--src/Generating/RoughRavines.cpp105
1 files changed, 73 insertions, 32 deletions
diff --git a/src/Generating/RoughRavines.cpp b/src/Generating/RoughRavines.cpp
index ddc1a0351..8dec791c9 100644
--- a/src/Generating/RoughRavines.cpp
+++ b/src/Generating/RoughRavines.cpp
@@ -22,6 +22,7 @@ class cRoughRavine :
public:
cRoughRavine(int a_Seed, int a_Size, float a_CenterWidth, float a_Roughness, int a_GridX, int a_GridZ, int a_OriginX, int a_OriginZ) :
super(a_GridX, a_GridZ, a_OriginX, a_OriginZ),
+ m_Seed(a_Seed + 100),
m_Noise(a_Seed + 100),
m_Roughness(a_Roughness)
{
@@ -41,6 +42,9 @@ public:
// Calculate the points in between, recursively:
SubdivideLine(0, Half);
SubdivideLine(Half, Max);
+
+ // Initialize the per-height radius modifiers:
+ InitPerHeightRadius(a_GridX, a_GridZ);
}
protected:
@@ -63,6 +67,8 @@ protected:
};
typedef std::vector<sRavineDefPoint> sRavineDefPoints;
+ int m_Seed;
+
cNoise m_Noise;
int m_MaxSize;
@@ -71,6 +77,9 @@ protected:
float m_Roughness;
+ /** Number to add to the radius based on the height. This creates the "ledges" in the ravine walls. */
+ float m_PerHeightRadius[cChunkDef::Height];
+
/** Recursively subdivides the line between the points of the specified index.
Sets the midpoint to the center of the line plus or minus a random offset, then calls itself for each half
@@ -114,6 +123,29 @@ protected:
}
+ void InitPerHeightRadius(int a_GridX, int a_GridZ)
+ {
+ int h = 0;
+ while (h < cChunkDef::Height)
+ {
+ m_Noise.SetSeed(m_Seed + h);
+ int rnd = m_Noise.IntNoise2DInt(a_GridX, a_GridZ) / 13;
+ int NumBlocks = (rnd % 3) + 2;
+ rnd = rnd / 4;
+ float Val = (float)(rnd % 256) / 128 - 1; // Random float in range [-1, +1]
+ if (h + NumBlocks > cChunkDef::Height)
+ {
+ NumBlocks = cChunkDef::Height - h;
+ }
+ for (int i = 0; i < NumBlocks; i++)
+ {
+ m_PerHeightRadius[h + i] = Val;
+ }
+ h += NumBlocks;
+ }
+ }
+
+
virtual void DrawIntoChunk(cChunkDesc & a_ChunkDesc) override
{
int BlockStartX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
@@ -123,18 +155,20 @@ protected:
for (sRavineDefPoints::const_iterator itr = m_DefPoints.begin(), end = m_DefPoints.end(); itr != end; ++itr)
{
if (
- (ceilf (itr->m_X + itr->m_Radius) < BlockStartX) ||
- (floorf(itr->m_X - itr->m_Radius) > BlockEndX) ||
- (ceilf (itr->m_Z + itr->m_Radius) < BlockStartZ) ||
- (floorf(itr->m_Z - itr->m_Radius) > BlockEndZ)
+ (ceilf (itr->m_X + itr->m_Radius + 2) < BlockStartX) ||
+ (floorf(itr->m_X - itr->m_Radius - 2) > BlockEndX) ||
+ (ceilf (itr->m_Z + itr->m_Radius + 2) < BlockStartZ) ||
+ (floorf(itr->m_Z - itr->m_Radius - 2) > BlockEndZ)
)
{
// Cannot intersect, bail out early
continue;
}
- // Carve out a cylinder around the xz point, m_Radius in diameter, from Bottom to Top:
- float RadiusSq = itr->m_Radius * itr->m_Radius; // instead of doing sqrt for each distance, we do sqr of the radius
+ // Carve out a cylinder around the xz point, up to (m_Radius + 2) in diameter, from Bottom to Top:
+ // On each height level, use m_PerHeightRadius[] to modify the actual radius used
+ // EnlargedRadiusSq is the square of the radius enlarged by the maximum m_PerHeightRadius offset - anything outside it will never be touched.
+ float RadiusSq = (itr->m_Radius + 2) * (itr->m_Radius + 2);
float DifX = BlockStartX - itr->m_X; // substitution for faster calc
float DifZ = BlockStartZ - itr->m_Z; // substitution for faster calc
for (int x = 0; x < cChunkDef::Width; x++) for (int z = 0; z < cChunkDef::Width; z++)
@@ -147,37 +181,44 @@ protected:
}
#endif // _DEBUG
+ // If the column is outside the enlarged radius, bail out completely
float DistSq = (DifX + x) * (DifX + x) + (DifZ + z) * (DifZ + z);
- if (DistSq <= RadiusSq)
+ if (DistSq > RadiusSq)
+ {
+ continue;
+ }
+
+ int Top = std::min((int)ceilf(itr->m_Top), +cChunkDef::Height);
+ for (int y = std::max((int)floorf(itr->m_Bottom), 1); y <= Top; y++)
{
- int Top = std::min((int)ceilf(itr->m_Top), +cChunkDef::Height);
- for (int y = std::max((int)floorf(itr->m_Bottom), 1); y <= Top; y++)
+ if ((itr->m_Radius + m_PerHeightRadius[y]) * (itr->m_Radius + m_PerHeightRadius[y]) < DistSq)
+ {
+ continue;
+ }
+ switch (a_ChunkDesc.GetBlockType(x, y, z))
{
- switch (a_ChunkDesc.GetBlockType(x, y, z))
+ // Only carve out these specific block types
+ case E_BLOCK_DIRT:
+ case E_BLOCK_GRASS:
+ case E_BLOCK_STONE:
+ case E_BLOCK_COBBLESTONE:
+ case E_BLOCK_GRAVEL:
+ case E_BLOCK_SAND:
+ case E_BLOCK_SANDSTONE:
+ case E_BLOCK_NETHERRACK:
+ case E_BLOCK_COAL_ORE:
+ case E_BLOCK_IRON_ORE:
+ case E_BLOCK_GOLD_ORE:
+ case E_BLOCK_DIAMOND_ORE:
+ case E_BLOCK_REDSTONE_ORE:
+ case E_BLOCK_REDSTONE_ORE_GLOWING:
{
- // Only carve out these specific block types
- case E_BLOCK_DIRT:
- case E_BLOCK_GRASS:
- case E_BLOCK_STONE:
- case E_BLOCK_COBBLESTONE:
- case E_BLOCK_GRAVEL:
- case E_BLOCK_SAND:
- case E_BLOCK_SANDSTONE:
- case E_BLOCK_NETHERRACK:
- case E_BLOCK_COAL_ORE:
- case E_BLOCK_IRON_ORE:
- case E_BLOCK_GOLD_ORE:
- case E_BLOCK_DIAMOND_ORE:
- case E_BLOCK_REDSTONE_ORE:
- case E_BLOCK_REDSTONE_ORE_GLOWING:
- {
- a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_AIR);
- break;
- }
- default: break;
+ a_ChunkDesc.SetBlockType(x, y, z, E_BLOCK_AIR);
+ break;
}
- }
- }
+ default: break;
+ } // switch (BlockType)
+ } // for y
} // for x, z - a_BlockTypes
} // for itr - m_Points[]
}