58 lines
2.4 KiB
Python
58 lines
2.4 KiB
Python
import unreal
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from .camera import look_at
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def _setup(actor, component_class, intensity, color):
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light = actor.get_component_by_class(component_class)
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light.set_mobility(unreal.ComponentMobility.MOVABLE)
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light.set_editor_property("intensity", float(intensity))
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light.set_light_color(unreal.LinearColor(*color, 1.0))
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return light
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def area(scene, name="Light", location=(200, -200, 350), target=(0, 0, 100),
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intensity=12000, color=(1, 1, 1), size=180):
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actor = scene.spawn(unreal.RectLight, name, location)
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light = _setup(actor, unreal.RectLightComponent, intensity, color)
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light.set_editor_property("source_width", float(size))
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light.set_editor_property("source_height", float(size))
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light.set_editor_property("attenuation_radius", 2000.0)
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look_at(actor, target)
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return actor
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def point(scene, name="Point", location=(0, 0, 250), intensity=10000, color=(1, 1, 1)):
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"""Bulb shining in all directions."""
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actor = scene.spawn(unreal.PointLight, name, location)
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light = _setup(actor, unreal.PointLightComponent, intensity, color)
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light.set_editor_property("attenuation_radius", 2000.0)
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return actor
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def spot(scene, name="Spot", location=(200, -200, 400), target=(0, 0, 100),
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intensity=20000, color=(1, 1, 1), angle=30):
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"""Cone of light; angle is measured in degrees from the cone axis."""
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actor = scene.spawn(unreal.SpotLight, name, location)
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light = _setup(actor, unreal.SpotLightComponent, intensity, color)
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light.set_editor_property("attenuation_radius", 2000.0)
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light.set_editor_property("outer_cone_angle", float(angle))
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light.set_editor_property("inner_cone_angle", float(angle) * 0.7)
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look_at(actor, target)
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return actor
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def sun(scene, name="Sun", location=(300, -300, 500), target=(0, 0, 0),
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intensity=500, color=(1, 1, 1)):
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"""Parallel light for the whole scene; only the location-target direction matters."""
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actor = scene.spawn(unreal.DirectionalLight, name, location)
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_setup(actor, unreal.DirectionalLightComponent, intensity, color)
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look_at(actor, target)
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return actor
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def studio(scene, key_color=(1.0, 0.82, 0.65), fill_color=(0.5, 0.7, 1.0)):
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return [area(scene, "Key", (200, -500, 350), color=key_color),
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area(scene, "Fill", (100, 300, 250), intensity=7000, color=fill_color),
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area(scene, "Rim", (-200, 0, 300), intensity=15000)]
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