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generator.c
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generator.c
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#include "generator.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LARGE 1
void setupLayer(int scale, Layer *l, Layer *p, int s, void (*getMap)(Layer *layer, int *out, int x, int z, int w, int h))
{
setBaseSeed(l, s);
l->scale = scale;
l->p = p;
l->p2 = NULL;
l->getMap = getMap;
l->oceanRnd = NULL;
}
void setupMultiLayer(int scale, Layer *l, Layer *p1, Layer *p2, int s, void (*getMap)(Layer *layer, int *out, int x, int z, int w, int h))
{
setBaseSeed(l, s);
l->scale = scale;
l->p = p1;
l->p2 = p2;
l->getMap = getMap;
l->oceanRnd = NULL;
}
LayerStack setupGenerator(const int mcversion)
{
if (mcversion <= MC_1_12)
return setupGeneratorMC17();
else
return setupGeneratorMC113();
}
LayerStack setupGeneratorMC17()
{
if (biomes[plains].id == 0)
{
fprintf(stderr, "Warning: The biomes have to be initialised first using initBiomes() before any generator can be used.\n");
}
LayerStack g;
#ifdef LARGE
g.layerNum = 46;
#else
g.layerNum=44;
#endif
g.layers = (Layer*) malloc(sizeof(Layer)*g.layerNum);
// SCALE LAYER PARENT SEED LAYER_FUNCTION
setupLayer(4096, &g.layers[ 0], NULL, 1, mapIsland);
setupLayer(2048, &g.layers[ 1], &g.layers[ 0], 2000, mapZoom);
setupLayer(2048, &g.layers[ 2], &g.layers[ 1], 1, mapAddIsland);
setupLayer(1024, &g.layers[ 3], &g.layers[ 2], 2001, mapZoom);
setupLayer(1024, &g.layers[ 4], &g.layers[ 3], 2, mapAddIsland);
setupLayer(1024, &g.layers[ 5], &g.layers[ 4], 50, mapAddIsland);
setupLayer(1024, &g.layers[ 6], &g.layers[ 5], 70, mapAddIsland);
setupLayer(1024, &g.layers[ 7], &g.layers[ 6], 2, mapRemoveTooMuchOcean);
setupLayer(1024, &g.layers[ 8], &g.layers[ 7], 2, mapAddSnow);
setupLayer(1024, &g.layers[ 9], &g.layers[ 8], 3, mapAddIsland);
setupLayer(1024, &g.layers[10], &g.layers[ 9], 2, mapCoolWarm);
setupLayer(1024, &g.layers[11], &g.layers[10], 2, mapHeatIce);
setupLayer(1024, &g.layers[12], &g.layers[11], 3, mapSpecial);
setupLayer( 512, &g.layers[13], &g.layers[12], 2002, mapZoom);
setupLayer( 256, &g.layers[14], &g.layers[13], 2003, mapZoom);
setupLayer( 256, &g.layers[15], &g.layers[14], 4, mapAddIsland);
setupLayer( 256, &g.layers[16], &g.layers[15], 5, mapAddMushroomIsland);
setupLayer( 256, &g.layers[17], &g.layers[16], 4, mapDeepOcean);
// biome layer chain
setupLayer( 256, &g.layers[18], &g.layers[17], 200, mapBiome);
setupLayer( 128, &g.layers[19], &g.layers[18], 1000, mapZoom);
setupLayer( 64, &g.layers[20], &g.layers[19], 1001, mapZoom);
setupLayer( 64, &g.layers[21], &g.layers[20], 1000, mapBiomeEdge);
// basic river layer chain, used to determine where hills generate
setupLayer( 256, &g.layers[22], &g.layers[17], 100, mapRiverInit);
setupLayer( 128, &g.layers[23], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[24], &g.layers[23], 1001, mapZoom);
#ifdef LARGE
setupMultiLayer(64, &g.layers[25], &g.layers[21], &g.layers[24], 1000, mapHills);
setupLayer( 64, &g.layers[26], &g.layers[25], 1001, mapRareBiome);
setupLayer( 32, &g.layers[27], &g.layers[26], 1000, mapZoom);
setupLayer( 32, &g.layers[28], &g.layers[27], 3, mapAddIsland);
setupLayer( 16, &g.layers[29], &g.layers[28], 1001, mapZoom);
setupLayer( 16, &g.layers[30], &g.layers[29], 1000, mapShore);
setupLayer( 8, &g.layers[31], &g.layers[30], 1002, mapZoom);
setupLayer( 4, &g.layers[32], &g.layers[31], 1003, mapZoom);
setupLayer( 2, &g.layers[33], &g.layers[32], 1004, mapZoom);
setupLayer( 1, &g.layers[34], &g.layers[33], 1005, mapZoom);
setupLayer( 0, &g.layers[35], &g.layers[34], 1000, mapSmooth);
// river layer chain
setupLayer( 128, &g.layers[36], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[37], &g.layers[36], 1001, mapZoom);
setupLayer( 32, &g.layers[38], &g.layers[37], 1000, mapZoom);
setupLayer( 16, &g.layers[39], &g.layers[38], 1001, mapZoom);
setupLayer( 8, &g.layers[40], &g.layers[39], 1002, mapZoom);
setupLayer( 4, &g.layers[41], &g.layers[40], 1003, mapZoom);
setupLayer( 4, &g.layers[42], &g.layers[41], 1, mapRiver);
setupLayer( 4, &g.layers[43], &g.layers[42], 1000, mapSmooth);
setupMultiLayer(4, &g.layers[44], &g.layers[35], &g.layers[43], 100, mapRiverMix);
setupLayer( 1, &g.layers[45], &g.layers[44], 10, mapVoronoiZoom);
#else
setupMultiLayer(64, &g.layers[25], &g.layers[21], &g.layers[24], 1000, mapHills);
setupLayer( 64, &g.layers[26], &g.layers[25], 1001, mapRareBiome);
setupLayer( 32, &g.layers[27], &g.layers[26], 1000, mapZoom);
setupLayer( 32, &g.layers[28], &g.layers[27], 3, mapAddIsland);
setupLayer( 16, &g.layers[29], &g.layers[28], 1001, mapZoom);
setupLayer( 16, &g.layers[30], &g.layers[29], 1000, mapShore);
setupLayer( 8, &g.layers[31], &g.layers[30], 1002, mapZoom);
setupLayer( 4, &g.layers[32], &g.layers[31], 1003, mapZoom);
setupLayer( 4, &g.layers[33], &g.layers[32], 1000, mapSmooth);
// river layer chain
setupLayer( 128, &g.layers[34], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[35], &g.layers[34], 1001, mapZoom);
setupLayer( 32, &g.layers[36], &g.layers[35], 1000, mapZoom);
setupLayer( 16, &g.layers[37], &g.layers[36], 1001, mapZoom);
setupLayer( 8, &g.layers[38], &g.layers[37], 1002, mapZoom);
setupLayer( 4, &g.layers[39], &g.layers[38], 1003, mapZoom);
setupLayer( 4, &g.layers[40], &g.layers[39], 1, mapRiver);
setupLayer( 4, &g.layers[41], &g.layers[40], 1000, mapSmooth);
setupMultiLayer(4, &g.layers[42], &g.layers[33], &g.layers[41], 100, mapRiverMix);
setupLayer( 1, &g.layers[43], &g.layers[42], 10, mapVoronoiZoom);
#endif
return g;
}
LayerStack setupGeneratorMC113()
{
if (biomes[plains].id == 0)
{
fprintf(stderr, "Warning: The biomes have to be initialised first using initBiomes() before any generator can be used.\n");
}
LayerStack g;
#ifdef LARGE
g.layerNum = 54;
#else
g.layerNum=52;
#endif
g.layers = (Layer *) malloc(sizeof(Layer) * g.layerNum);
// SCALE LAYER PARENT SEED LAYER_FUNCTION
setupLayer(4096, &g.layers[ 0], NULL, 1, mapIsland);
setupLayer(2048, &g.layers[ 1], &g.layers[ 0], 2000, mapZoom);
setupLayer(2048, &g.layers[ 2], &g.layers[ 1], 1, mapAddIsland);
setupLayer(1024, &g.layers[ 3], &g.layers[ 2], 2001, mapZoom);
setupLayer(1024, &g.layers[ 4], &g.layers[ 3], 2, mapAddIsland);
setupLayer(1024, &g.layers[ 5], &g.layers[ 4], 50, mapAddIsland);
setupLayer(1024, &g.layers[ 6], &g.layers[ 5], 70, mapAddIsland);
setupLayer(1024, &g.layers[ 7], &g.layers[ 6], 2, mapRemoveTooMuchOcean);
setupLayer(1024, &g.layers[ 8], &g.layers[ 7], 2, mapAddSnow);
setupLayer(1024, &g.layers[ 9], &g.layers[ 8], 3, mapAddIsland);
setupLayer(1024, &g.layers[10], &g.layers[ 9], 2, mapCoolWarm);
setupLayer(1024, &g.layers[11], &g.layers[10], 2, mapHeatIce);
setupLayer(1024, &g.layers[12], &g.layers[11], 3, mapSpecial);
setupLayer( 512, &g.layers[13], &g.layers[12], 2002, mapZoom);
setupLayer( 256, &g.layers[14], &g.layers[13], 2003, mapZoom);
setupLayer( 256, &g.layers[15], &g.layers[14], 4, mapAddIsland);
setupLayer( 256, &g.layers[16], &g.layers[15], 5, mapAddMushroomIsland);
setupLayer( 256, &g.layers[17], &g.layers[16], 4, mapDeepOcean);
// biome layer chain
setupLayer( 256, &g.layers[18], &g.layers[17], 200, mapBiome);
setupLayer( 128, &g.layers[19], &g.layers[18], 1000, mapZoom);
setupLayer( 64, &g.layers[20], &g.layers[19], 1001, mapZoom);
setupLayer( 64, &g.layers[21], &g.layers[20], 1000, mapBiomeEdge);
// basic river layer chain, used to determine where hills generate
setupLayer( 256, &g.layers[22], &g.layers[17], 100, mapRiverInit);
setupLayer( 128, &g.layers[23], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[24], &g.layers[23], 1001, mapZoom);
setupMultiLayer(64, &g.layers[25], &g.layers[21], &g.layers[24], 1000, mapHills113);
setupLayer( 64, &g.layers[26], &g.layers[25], 1001, mapRareBiome);
setupLayer( 32, &g.layers[27], &g.layers[26], 1000, mapZoom);
setupLayer( 32, &g.layers[28], &g.layers[27], 3, mapAddIsland);
setupLayer( 16, &g.layers[29], &g.layers[28], 1001, mapZoom);
setupLayer( 16, &g.layers[30], &g.layers[29], 1000, mapShore);
setupLayer( 8, &g.layers[31], &g.layers[30], 1002, mapZoom);
setupLayer( 4, &g.layers[32], &g.layers[31], 1003, mapZoom);
#ifdef LARGE
setupLayer( 2, &g.layers[33], &g.layers[32], 1004, mapZoom);
setupLayer( 1, &g.layers[34], &g.layers[33], 1005, mapZoom);
setupLayer( 0, &g.layers[35], &g.layers[34], 1000, mapSmooth);
// river layer chain
setupLayer( 128, &g.layers[36], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[37], &g.layers[35], 1001, mapZoom);
setupLayer( 32, &g.layers[38], &g.layers[37], 1000, mapZoom);
setupLayer( 16, &g.layers[39], &g.layers[38], 1001, mapZoom);
setupLayer( 8, &g.layers[40], &g.layers[39], 1002, mapZoom);
setupLayer( 4, &g.layers[41], &g.layers[40], 1003, mapZoom);
setupLayer( 4, &g.layers[42], &g.layers[41], 1, mapRiver);
setupLayer( 4, &g.layers[43], &g.layers[42], 1000, mapSmooth);
setupMultiLayer(4, &g.layers[44], &g.layers[35], &g.layers[43], 100, mapRiverMix);
// ocean variants
setupLayer( 256, &g.layers[45], NULL, 2, mapOceanTemp);
g.layers[45].oceanRnd = (OceanRnd *) malloc(sizeof(OceanRnd));
setupLayer( 128, &g.layers[46], &g.layers[45], 2001, mapZoom);
setupLayer( 64, &g.layers[47], &g.layers[46], 2002, mapZoom);
setupLayer( 32, &g.layers[48], &g.layers[47], 2003, mapZoom);
setupLayer( 16, &g.layers[49], &g.layers[48], 2004, mapZoom);
setupLayer( 8, &g.layers[50], &g.layers[49], 2005, mapZoom);
setupLayer( 4, &g.layers[51], &g.layers[50], 2006, mapZoom);
setupMultiLayer(4, &g.layers[52], &g.layers[44], &g.layers[51], 100, mapOceanMix);
setupLayer(1, &g.layers[53], &g.layers[52], 10, mapVoronoiZoom);
#else
setupLayer( 4, &g.layers[33], &g.layers[32], 1000, mapSmooth);
// river layer chain
setupLayer( 128, &g.layers[34], &g.layers[22], 1000, mapZoom);
setupLayer( 64, &g.layers[35], &g.layers[34], 1001, mapZoom);
setupLayer( 32, &g.layers[36], &g.layers[35], 1000, mapZoom);
setupLayer( 16, &g.layers[37], &g.layers[36], 1001, mapZoom);
setupLayer( 8, &g.layers[38], &g.layers[37], 1002, mapZoom);
setupLayer( 4, &g.layers[39], &g.layers[38], 1003, mapZoom);
setupLayer( 4, &g.layers[40], &g.layers[39], 1, mapRiver);
setupLayer( 4, &g.layers[41], &g.layers[40], 1000, mapSmooth);
setupMultiLayer(4, &g.layers[42], &g.layers[33], &g.layers[41], 100, mapRiverMix);
// ocean variants
setupLayer( 256, &g.layers[43], NULL, 2, mapOceanTemp);
g.layers[43].oceanRnd = (OceanRnd *) malloc(sizeof(OceanRnd));
setupLayer( 128, &g.layers[44], &g.layers[43], 2001, mapZoom);
setupLayer( 64, &g.layers[45], &g.layers[44], 2002, mapZoom);
setupLayer( 32, &g.layers[46], &g.layers[45], 2003, mapZoom);
setupLayer( 16, &g.layers[47], &g.layers[46], 2004, mapZoom);
setupLayer( 8, &g.layers[48], &g.layers[47], 2005, mapZoom);
setupLayer( 4, &g.layers[49], &g.layers[48], 2006, mapZoom);
setupMultiLayer(4, &g.layers[50], &g.layers[42], &g.layers[49], 100, mapOceanMix);
setupLayer(1, &g.layers[51], &g.layers[50], 10, mapVoronoiZoom);
#endif
return g;
}
void freeGenerator(LayerStack g)
{
int i;
for(i = 0; i < g.layerNum; i++)
{
if (g.layers[i].oceanRnd != NULL)
free(g.layers[i].oceanRnd);
}
free(g.layers);
}
/* Recursively calculates the minimum buffer size required to generate an area
* of the specified size from the current layer onwards.
*/
static void getMaxArea(Layer *layer, int areaX, int areaZ, int *maxX, int *maxZ)
{
if (layer == NULL)
return;
if (layer->getMap == mapZoom)
{
areaX = (areaX >> 1) + 2;
areaZ = (areaZ >> 1) + 2;
}
else if (layer->getMap == mapVoronoiZoom)
{
areaX = (areaX >> 2) + 2;
areaZ = (areaZ >> 2) + 2;
}
else if (layer->getMap == mapOceanMix)
{
areaX += 17;
areaZ += 17;
}
else
{
if (layer->getMap != mapNull &&
layer->getMap != mapSkip &&
layer->getMap != mapIsland &&
layer->getMap != mapSpecial &&
layer->getMap != mapBiome &&
layer->getMap != mapRiverInit &&
layer->getMap != mapRiverMix &&
layer->getMap != mapOceanTemp)
{
areaX += 2;
areaZ += 2;
}
}
if (areaX > *maxX) *maxX = areaX;
if (areaZ > *maxZ) *maxZ = areaZ;
getMaxArea(layer->p, areaX, areaZ, maxX, maxZ);
getMaxArea(layer->p2, areaX, areaZ, maxX, maxZ);
}
int calcRequiredBuf(Layer *layer, int areaX, int areaZ)
{
int maxX = areaX, maxZ = areaZ;
getMaxArea(layer, areaX, areaZ, &maxX, &maxZ);
return maxX * maxZ;
}
int *allocCache(Layer *layer, int sizeX, int sizeZ)
{
int size = calcRequiredBuf(layer, sizeX, sizeZ);
int *ret = (int *) malloc(sizeof(*ret)*size);
memset(ret, 0, sizeof(*ret)*size);
return ret;
}
void applySeed(LayerStack *g, int64_t seed)
{
// the seed has to be applied recursively
setWorldSeed(&g->layers[g->layerNum-1], seed);
}
void genArea(Layer *layer, int *out, int areaX, int areaZ, int areaWidth, int areaHeight)
{
memset(out, 0, areaWidth*areaHeight*sizeof(*out));
layer->getMap(layer, out, areaX, areaZ, areaWidth, areaHeight);
}