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Grid layers: add HeightMap-based procedural generation methods

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TileLayer (closes #200):
- apply_threshold(source, range, tile): Set tile index where heightmap value is in range
- apply_ranges(source, ranges): Apply multiple tile assignments in one pass

ColorLayer (closes #201):
- apply_threshold(source, range, color): Set fixed color where value is in range
- apply_gradient(source, range, color_low, color_high): Interpolate colors based on value
- apply_ranges(source, ranges): Apply multiple color assignments (fixed or gradient)

All methods return self for chaining. HeightMap size must match layer dimensions.
Later ranges override earlier ones if overlapping. Cells not matching any range are unchanged.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
John McCardle 2026-01-11 22:35:44 -05:00
commit a4b1ab7d68
4 changed files with 1165 additions and 0 deletions
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5
src/GridLayers.h
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@ -205,6 +205,9 @@ public:
static PyObject* ColorLayer_apply_perspective(PyColorLayerObject* self, PyObject* args, PyObject* kwds);
static PyObject* ColorLayer_update_perspective(PyColorLayerObject* self, PyObject* args);
static PyObject* ColorLayer_clear_perspective(PyColorLayerObject* self, PyObject* args);
static PyObject* ColorLayer_apply_hmap_threshold(PyColorLayerObject* self, PyObject* args, PyObject* kwds);
static PyObject* ColorLayer_apply_gradient(PyColorLayerObject* self, PyObject* args, PyObject* kwds);
static PyObject* ColorLayer_apply_ranges(PyColorLayerObject* self, PyObject* args);
static PyObject* ColorLayer_get_z_index(PyColorLayerObject* self, void* closure);
static int ColorLayer_set_z_index(PyColorLayerObject* self, PyObject* value, void* closure);
static PyObject* ColorLayer_get_visible(PyColorLayerObject* self, void* closure);
@ -218,6 +221,8 @@ public:
static PyObject* TileLayer_set(PyTileLayerObject* self, PyObject* args);
static PyObject* TileLayer_fill(PyTileLayerObject* self, PyObject* args);
static PyObject* TileLayer_fill_rect(PyTileLayerObject* self, PyObject* args, PyObject* kwds);
static PyObject* TileLayer_apply_threshold(PyTileLayerObject* self, PyObject* args, PyObject* kwds);
static PyObject* TileLayer_apply_ranges(PyTileLayerObject* self, PyObject* args);
static PyObject* TileLayer_get_z_index(PyTileLayerObject* self, void* closure);
static int TileLayer_set_z_index(PyTileLayerObject* self, PyObject* value, void* closure);
static PyObject* TileLayer_get_visible(PyTileLayerObject* self, void* closure);