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Noise, combination, and sampling: first pass at #207, #208, #194, #209

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John McCardle 2026-01-12 19:01:20 -05:00
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#pragma once
#include "Common.h"
#include "Python.h"
#include <libtcod.h>
#include <cstdint>
// Forward declaration
class PyNoiseSource;
// Python object structure for NoiseSource
typedef struct {
PyObject_HEAD
TCOD_Noise* noise; // libtcod noise object (owned)
int dimensions; // 1-4
TCOD_noise_type_t algorithm; // PERLIN, SIMPLEX, or WAVELET
float hurst; // Hurst exponent for fbm/turbulence
float lacunarity; // Frequency multiplier between octaves
uint32_t seed; // Random seed (stored even if auto-generated)
} PyNoiseSourceObject;
class PyNoiseSource
{
public:
// Python type interface
static PyObject* pynew(PyTypeObject* type, PyObject* args, PyObject* kwds);
static int init(PyNoiseSourceObject* self, PyObject* args, PyObject* kwds);
static void dealloc(PyNoiseSourceObject* self);
static PyObject* repr(PyObject* obj);
// Properties (all read-only)
static PyObject* get_dimensions(PyNoiseSourceObject* self, void* closure);
static PyObject* get_algorithm(PyNoiseSourceObject* self, void* closure);
static PyObject* get_hurst(PyNoiseSourceObject* self, void* closure);
static PyObject* get_lacunarity(PyNoiseSourceObject* self, void* closure);
static PyObject* get_seed(PyNoiseSourceObject* self, void* closure);
// Point query methods (#207)
static PyObject* get(PyNoiseSourceObject* self, PyObject* args);
static PyObject* fbm(PyNoiseSourceObject* self, PyObject* args, PyObject* kwds);
static PyObject* turbulence(PyNoiseSourceObject* self, PyObject* args, PyObject* kwds);
// Batch sampling method (#208) - returns HeightMap
static PyObject* sample(PyNoiseSourceObject* self, PyObject* args, PyObject* kwds);
// Method and property definitions
static PyMethodDef methods[];
static PyGetSetDef getsetters[];
};
namespace mcrfpydef {
inline PyTypeObject PyNoiseSourceType = {
.ob_base = {.ob_base = {.ob_refcnt = 1, .ob_type = NULL}, .ob_size = 0},
.tp_name = "mcrfpy.NoiseSource",
.tp_basicsize = sizeof(PyNoiseSourceObject),
.tp_itemsize = 0,
.tp_dealloc = (destructor)PyNoiseSource::dealloc,
.tp_repr = PyNoiseSource::repr,
.tp_flags = Py_TPFLAGS_DEFAULT,
.tp_doc = PyDoc_STR(
"NoiseSource(dimensions: int = 2, algorithm: str = 'simplex', hurst: float = 0.5, lacunarity: float = 2.0, seed: int = None)\n\n"
"A configured noise generator for procedural generation.\n\n"
"NoiseSource wraps libtcod's noise generator, providing coherent noise values "
"that can be used for terrain generation, textures, and other procedural content. "
"The same coordinates always produce the same value (deterministic).\n\n"
"Args:\n"
" dimensions: Number of input dimensions (1-4). Default: 2.\n"
" algorithm: Noise algorithm - 'simplex', 'perlin', or 'wavelet'. Default: 'simplex'.\n"
" hurst: Fractal Hurst exponent for fbm/turbulence (0.0-1.0). Default: 0.5.\n"
" lacunarity: Frequency multiplier between octaves. Default: 2.0.\n"
" seed: Random seed for reproducibility. None for random seed.\n\n"
"Properties:\n"
" dimensions (int): Read-only. Number of input dimensions.\n"
" algorithm (str): Read-only. Noise algorithm name.\n"
" hurst (float): Read-only. Hurst exponent.\n"
" lacunarity (float): Read-only. Lacunarity value.\n"
" seed (int): Read-only. Seed used (even if originally None).\n\n"
"Example:\n"
" noise = mcrfpy.NoiseSource(dimensions=2, algorithm='simplex', seed=42)\n"
" value = noise.get((10.5, 20.3)) # Returns -1.0 to 1.0\n"
" fbm_val = noise.fbm((10.5, 20.3), octaves=6)\n"
),
.tp_methods = nullptr, // Set in McRFPy_API.cpp
.tp_getset = nullptr, // Set in McRFPy_API.cpp
.tp_init = (initproc)PyNoiseSource::init,
.tp_new = PyNoiseSource::pynew,
};
}