67 lines
1.9 KiB
GDScript
67 lines
1.9 KiB
GDScript
tool
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extends "res://addons/procedural_material/node_base.gd"
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var size = 5
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var amount = 0.0
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var input_shader = ""
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var input_texture
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var final_texture
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const CONVOLUTION = {
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x=1,
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y=1,
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kernel=[
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Vector3(-1, -1, 0), Vector3(0, -2, 0), Vector3(1, -1, 0),
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Vector3(-2, 0, 0), 0, Vector3(2, 0, 0),
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Vector3(-1, 1, 0), Vector3(0, 2, 0), Vector3(1, 1, 0),
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],
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epsilon=1.0/1024,
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normalize=true,
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translate_before_normalize=Vector3(0.0, 0.0, -1.0),
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scale_before_normalize=0.5,
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translate=Vector3(0.5, 0.5, 0.5),
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scale=0.5
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}
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func _ready():
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# init size widget
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$HBoxContainer1/size.clear()
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for i in range(7):
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$HBoxContainer1/size.add_item(str(int(pow(2, 5+i))), i)
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$HBoxContainer1/size.selected = size
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input_texture = ImageTexture.new()
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final_texture = ImageTexture.new()
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initialize_properties([ $HBoxContainer1/size, $HBoxContainer2/amount ])
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func _rerender():
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get_parent().precalculate_shader(input_shader, get_source().get_textures(), int(pow(2, 5+size)), input_texture, self, "pass_1", [])
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func pass_1():
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var convolution = CONVOLUTION
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convolution.epsilon=1.0/pow(2, 5+size)
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convolution.scale_before_normalize = pow(2, size-1)*amount
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get_parent().precalculate_shader(get_convolution_shader(convolution), { input=input_texture}, int(pow(2, 5+size)), final_texture, self, "rerender_targets", [])
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func get_textures():
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var list = {}
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list[name] = final_texture
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return list
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func _get_shader_code(uv):
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var rv = { defs="", code="" }
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var src = get_source()
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if src == null:
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return rv
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input_shader = do_generate_shader(src.get_shader_code("UV"))
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_rerender()
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if generated_variants.empty():
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rv.defs = "uniform sampler2D %s_tex;\n" % [ name ]
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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 = "vec3 %s_%d_rgb = texture(%s_tex, %s).rgb;\n" % [ name, variant_index, name, uv ]
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rv.rgb = "%s_%d_rgb" % [ name, variant_index ]
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return rv
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