forked from EXTERNAL/bareiron
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
#include <stdlib.h>
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#include "globals.h"
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#include "tools.h"
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#include "registries.h"
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#include "worldgen.h"
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#include "procedures.h"
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#include "structures.h"
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void setBlockIfReplaceable (short x, uint8_t y, short z, uint8_t block) {
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if (!isReplaceableBlock(getBlockAt(x, y, z))) return;
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makeBlockChange(x, y, z, block);
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}
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// Places a tree centered on the input coordinates
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void placeTreeStructure (short x, uint8_t y, short z) {
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// Get a random number for tree height and leaf edges
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uint32_t r = fast_rand();
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uint8_t height = 4 + (r % 3);
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// Set tree base - replace sapling with log and put dirt below
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makeBlockChange(x, y - 1, z, B_dirt);
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makeBlockChange(x, y, z, B_oak_log);
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// Create tree stump
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for (int i = 1; i < height; i ++) {
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setBlockIfReplaceable(x, y + i, z, B_oak_log);
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}
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// Keep track of leaf corners, determines random number bit shift
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uint8_t t = 2;
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// First (bottom) leaf layer
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for (int i = -2; i <= 2; i ++) {
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for (int j = -2; j <= 2; j ++) {
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setBlockIfReplaceable(x + i, y + height - 3, z + j, B_oak_leaves);
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// Randomly skip some corners, emulating vanilla tree shape
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if ((i == 2 || i == -2) && (j == 2 || j == -2)) {
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t ++;
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if ((r >> t) & 1) continue;
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}
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setBlockIfReplaceable(x + i, y + height - 2, z + j, B_oak_leaves);
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}
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}
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// Second (top) leaf layer
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for (int i = -1; i <= 1; i ++) {
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for (int j = -1; j <= 1; j ++) {
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setBlockIfReplaceable(x + i, y + height - 1, z + j, B_oak_leaves);
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if ((i == 1 || i == -1) && (j == 1 || j == -1)) {
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t ++;
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if ((r >> t) & 1) continue;
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}
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setBlockIfReplaceable(x + i, y + height, z + j, B_oak_leaves);
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}
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}
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}
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