75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
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"""CharacterAssembler - composite layered sprite sheets with HSL recoloring.
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Uses the engine's Texture.composite() and texture.hsl_shift() methods to
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build composite character textures from multiple layer PNG files, without
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requiring PIL or any external Python packages.
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"""
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import mcrfpy
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from .formats import PUNY_29, SheetFormat
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class CharacterAssembler:
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"""Build composite character sheets from layer files.
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Layers are added bottom-to-top (skin first, then clothes, hair, etc).
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Each layer can be HSL-shifted for recoloring before compositing.
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Args:
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fmt: SheetFormat describing the sprite dimensions (default: PUNY_29)
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"""
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def __init__(self, fmt=None):
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if fmt is None:
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fmt = PUNY_29
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self.fmt = fmt
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self.layers = []
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def add_layer(self, path, hue_shift=0.0, sat_shift=0.0, lit_shift=0.0):
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"""Queue a layer PNG with optional HSL recoloring.
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Args:
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path: File path to the layer PNG
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hue_shift: Hue rotation in degrees [0, 360)
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sat_shift: Saturation adjustment [-1.0, 1.0]
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lit_shift: Lightness adjustment [-1.0, 1.0]
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"""
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self.layers.append((path, hue_shift, sat_shift, lit_shift))
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return self # allow chaining
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def clear(self):
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"""Remove all queued layers."""
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self.layers.clear()
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return self
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def build(self, name="<composed>"):
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"""Composite all queued layers into a single Texture.
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Loads each layer file, applies HSL shifts if any, then composites
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all layers bottom-to-top using alpha blending.
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Args:
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name: Optional name for the resulting texture
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Returns:
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mcrfpy.Texture: The composited texture
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Raises:
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ValueError: If no layers have been added
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IOError: If a layer file cannot be loaded
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"""
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if not self.layers:
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raise ValueError("No layers added. Call add_layer() first.")
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textures = []
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for path, h, s, l in self.layers:
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tex = mcrfpy.Texture(path, self.fmt.tile_w, self.fmt.tile_h)
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if h != 0.0 or s != 0.0 or l != 0.0:
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tex = tex.hsl_shift(h, s, l)
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textures.append(tex)
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if len(textures) == 1:
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return textures[0]
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return mcrfpy.Texture.composite(
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textures, self.fmt.tile_w, self.fmt.tile_h, name
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)
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