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Fix MapgenV6::getGroundLevelAtPoint()

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kwolekr 2013-01-07 16:42:00 -05:00 committed by Perttu Ahola
parent 631a835e07
commit 1cd8351054
3 changed files with 56 additions and 5 deletions
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2
src/mapgen.h
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@ -202,7 +202,7 @@ public:
void makeChunk(BlockMakeData *data); void makeChunk(BlockMakeData *data);
int getGroundLevelAtPoint(v2s16 p); int getGroundLevelAtPoint(v2s16 p);
double baseRockLevelFromNoise(v2s16 p);
static s16 find_ground_level(VoxelManipulator &vmanip, v2s16 p2d, INodeDefManager *ndef); static s16 find_ground_level(VoxelManipulator &vmanip, v2s16 p2d, INodeDefManager *ndef);
static s16 find_stone_level(VoxelManipulator &vmanip, v2s16 p2d, INodeDefManager *ndef); static s16 find_stone_level(VoxelManipulator &vmanip, v2s16 p2d, INodeDefManager *ndef);
void make_tree(ManualMapVoxelManipulator &vmanip, v3s16 p0, bool is_apple_tree, INodeDefManager *ndef); void make_tree(ManualMapVoxelManipulator &vmanip, v3s16 p0, bool is_apple_tree, INodeDefManager *ndef);

35
src/mapgen_v6.cpp
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@ -311,9 +311,40 @@ double MapgenV6::base_rock_level_2d(u64 seed, v2s16 p)
return h; return h;
} }
double MapgenV6::baseRockLevelFromNoise(v2s16 p) {
double base = water_level +
NoisePerlin2DPosOffset(noise_terrain_base->np, p.X, 0.5, p.Y, 0.5, seed);
double higher = water_level +
NoisePerlin2DPosOffset(noise_terrain_higher->np, p.X, 0.5, p.Y, 0.5, seed);
if (higher < base)
higher = base;
double b = NoisePerlin2DPosOffset(noise_steepness->np, p.X, 0.5, p.Y, 0.5, seed);
b = rangelim(b, 0.0, 1000.0);
b = b*b*b*b*b*b*b;
b *= 5;
b = rangelim(b, 0.5, 1000.0);
if(b > 1.5 && b < 100.0){
if(b < 10.0)
b = 1.5;
else
b = 100.0;
}
double a_off = -0.20;
double a = 0.5 + b * (a_off + NoisePerlin2DNoTxfmPosOffset(
noise_height_select->np, p.X, 0.5, p.Y, 0.5, seed));
a = rangelim(a, 0.0, 1.0);
return base * (1.0 - a) + higher * a;
}
s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) s16 MapgenV6::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision)
{ {
return base_rock_level_2d(seed, p2d) + AVERAGE_MUD_AMOUNT; return baseRockLevelFromNoise(p2d) + AVERAGE_MUD_AMOUNT;
} }
double MapgenV6::get_mud_add_amount(u64 seed, v2s16 p) double MapgenV6::get_mud_add_amount(u64 seed, v2s16 p)
@ -363,7 +394,7 @@ u32 MapgenV6::get_blockseed(u64 seed, v3s16 p)
int MapgenV6::getGroundLevelAtPoint(v2s16 p) { int MapgenV6::getGroundLevelAtPoint(v2s16 p) {
return base_rock_level_2d(seed, p) + AVERAGE_MUD_AMOUNT; return baseRockLevelFromNoise(p) + AVERAGE_MUD_AMOUNT;
} }

24
src/noise.h
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@ -132,8 +132,28 @@ inline float easeCurve(float t) {
return t * t * t * (t * (6.f * t - 15.f) + 10.f); return t * t * t * (t * (6.f * t - 15.f) + 10.f);
} }
#define NoisePerlin2D(np, x, y, s) ((np)->offset + (np)->scale * \ #define NoisePerlin2D(np, x, y, s) \
noise2d_perlin((float)(x) / (np)->spread.X, (float)(y) / (np)->spread.Y, \ ((np)->offset + (np)->scale * noise2d_perlin( \
(float)(x) / (np)->spread.X, \
(float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DNoTxfm(np, x, y, s) \
(noise2d_perlin( \
(float)(x) / (np)->spread.X, \
(float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DPosOffset(np, x, xoff, y, yoff, s) \
((np)->offset + (np)->scale * noise2d_perlin( \
(float)(xoff) + (float)(x) / (np)->spread.X, \
(float)(yoff) + (float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin2DNoTxfmPosOffset(np, x, xoff, y, yoff, s) \
(noise2d_perlin( \
(float)(xoff) + (float)(x) / (np)->spread.X, \
(float)(yoff) + (float)(y) / (np)->spread.Y, \
(s) + (np)->seed, (np)->octaves, (np)->persist)) (s) + (np)->seed, (np)->octaves, (np)->persist))
#define NoisePerlin3D(np, x, y, z, s) ((np)->offset + (np)->scale * \ #define NoisePerlin3D(np, x, y, z, s) ((np)->offset + (np)->scale * \