Extras.txt

// Tree placement using noise-based clustering
		FastNoiseLite treeNoise;
		treeNoise.SetNoiseType(FastNoiseLite::NoiseType_Perlin); // Smooth variation
		treeNoise.SetFrequency(0.1f); // Controls cluster size

    for (int x = 0; x < terrain.height - 1; ++x) {
        for (int y = 0; y < terrain.width - 1; ++y) {
            float h = terrain.heightMap[x][y];

            // Only place trees on grassy terrain
            if (h > 20.0f && h < 35.0f) {
                float treeChance = treeNoise.GetNoise((float)x, (float)y); // Range ~[-1, 1]
                if (treeChance > 0.4f) {
                    float worldX = x - terrain.width / 2.0f;
                    float worldZ = y - terrain.height / 2.0f;

                    // Tree trunk
                    glColor3f(0.4f, 0.2f, 0.1f);
                    glBegin(GL_LINES);
                    glVertex3f(worldX, h, worldZ);
                    glVertex3f(worldX, h + 2.0f, worldZ);
                    glEnd();

                    // Tree canopy
                    glColor3f(0.1f, 0.6f, 0.1f);
                    glPointSize(4.0f);
                    glBegin(GL_POINTS);
                    glVertex3f(worldX, h + 2.5f, worldZ);
                    glEnd();
                }
            }
        }
    }