4jcraft/Minecraft.World/WorldGen/Features/PineFeature.cpp

#include "../../Platform/stdafx.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "../../Headers/net.minecraft.world.level.tile.h"
#include "PineFeature.h"

bool PineFeature::place(Level* level, Random* random, int x, int y, int z) {
    // pines can be quite tall
    int treeHeight = random->nextInt(5) + 7;
    int trunkHeight = treeHeight - random->nextInt(2) - 3;
    int topHeight = treeHeight - trunkHeight;
    int topRadius = 1 + random->nextInt(topHeight + 1);

    bool free = true;
    // may not be outside of y boundaries
    if (y < 1 || y + treeHeight + 1 > Level::genDepth) {
        return false;
    }

    // 4J Stu Added to stop tree features generating areas previously place by
    // game rule generation
    if (app.getLevelGenerationOptions() != nullptr) {
        LevelGenerationOptions* levelGenOptions =
            app.getLevelGenerationOptions();
        bool intersects = levelGenOptions->checkIntersects(
            x - topRadius, y - 1, z - topRadius, x + topRadius, y + treeHeight,
            z + topRadius);
        if (intersects) {
            // app.DebugPrintf("Skipping reeds feature generation as it overlaps
            // a game rule structure\n");
            return false;
        }
    }

    // make sure there is enough space
    for (int yy = y; yy <= y + 1 + treeHeight && free; yy++) {
        int r = 1;
        if ((yy - y) < trunkHeight) {
            r = 0;
        } else {
            r = topRadius;
        }
        for (int xx = x - r; xx <= x + r && free; xx++) {
            for (int zz = z - r; zz <= z + r && free; zz++) {
                if (yy >= 0 && yy < Level::genDepth) {
                    int tt = level->getTile(xx, yy, zz);
                    if (tt != 0 && tt != Tile::leaves_Id) free = false;
                } else {
                    free = false;
                }
            }
        }
    }

    if (!free) return false;

    // must stand on ground
    int belowTile = level->getTile(x, y - 1, z);
    if ((belowTile != Tile::grass_Id && belowTile != Tile::dirt_Id) ||
        y >= Level::genDepth - treeHeight - 1)
        return false;

    placeBlock(level, x, y - 1, z, Tile::dirt_Id);

    // place leaf top
    int currentRadius = 0;
    for (int yy = y + treeHeight; yy >= y + trunkHeight; yy--) {
        for (int xx = x - currentRadius; xx <= x + currentRadius; xx++) {
            int xo = xx - (x);
            for (int zz = z - currentRadius; zz <= z + currentRadius; zz++) {
                int zo = zz - (z);
                if (abs(xo) == currentRadius && abs(zo) == currentRadius &&
                    currentRadius > 0)
                    continue;
                if (!Tile::solid[level->getTile(xx, yy, zz)])
                    placeBlock(level, xx, yy, zz, Tile::leaves_Id,
                               LeafTile::EVERGREEN_LEAF);
            }
        }

        if (currentRadius >= 1 && yy == (y + trunkHeight + 1)) {
            currentRadius -= 1;
        } else if (currentRadius < topRadius) {
            currentRadius += 1;
        }
    }
    for (int hh = 0; hh < treeHeight - 1; hh++) {
        int t = level->getTile(x, y + hh, z);
        if (t == 0 || t == Tile::leaves_Id)
            placeBlock(level, x, y + hh, z, Tile::treeTrunk_Id,
                       TreeTile::DARK_TRUNK);
    }

    return true;
}