29 lines
1008 B
GDScript
29 lines
1008 B
GDScript
tool
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extends "res://addons/procedural_material/node_base.gd"
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var hue
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var saturation
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var value
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func _ready():
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initialize_properties([ $HBoxContainer1/hue, $HBoxContainer2/saturation, $HBoxContainer3/value ])
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func _get_shader_code(uv, output = 0):
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var rv = { defs="", code="" }
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var src = get_source()
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var src_code = { defs="", code="", rgb="vec3(0.0)" }
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if src == null:
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return rv
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src_code = src.get_shader_code(uv)
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if generated_variants.empty():
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rv.defs = src_code.defs;
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rv.defs += "vec3 %s_rgb(vec3 c) { vec3 hsv = rgb2hsv(c); return hsv2rgb(vec3(fract(hsv.x+%.9f), clamp(hsv.y*%.9f, 0.0, 1.0), clamp(hsv.z*%.9f, 0.0, 1.0))); }\n" % [ name, hue, saturation, value ]
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var variant_index = generated_variants.find(uv)
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if variant_index == -1:
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variant_index = generated_variants.size()
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generated_variants.append(uv)
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rv.code = src_code.code
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rv.code += "vec3 %s_%d_rgb = %s_rgb(%s);\n" % [ name, variant_index, name, src_code.rgb ]
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rv.rgb = "%s_%d_rgb" % [ name, variant_index ]
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return rv
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