81 lines
2.9 KiB
Python
81 lines
2.9 KiB
Python
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from lnx.logicnode.lnx_nodes import *
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import re
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class MathExpressionNode(LnxLogicTreeNode):
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"""Mathematical operations on values."""
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bl_idname = 'LNMathExpressionNode'
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bl_label = 'Math Expression'
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lnx_version = 2
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num_params: IntProperty(default=2, min=0)
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@staticmethod
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def get_variable_name(index):
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return chr( range(ord('a'), ord('z')+1)[index] )
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def set_exp(self, value):
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self['property2'] = value
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# TODO: Check expression for errors
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self['exp_error'] = False
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def get_exp(self):
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return self.get('property2', 'a + b')
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property0: HaxeBoolProperty('property0', name='Clamp Result', default=False)
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property1: HaxeIntProperty('property1', name='Number of Params', default=2)
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property2: HaxeStringProperty('property2', name='', description='Math Expression: +, -, *, /, ^, %, (, ), log(a, b), ln(a), abs(a), max(a,b), min(a,b), sin(a), cos(a), tan(a), cot(a), asin(a), acos(a), atan(a), atan2(a,b), pi(), e()', set=set_exp, get=get_exp)
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def __init__(self):
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super(MathExpressionNode, self).__init__()
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self.register_id()
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def lnx_init(self, context):
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# OUTPUTS:
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self.add_output('LnxFloatSocket', 'Result')
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# two default parameters at start
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self.add_input('LnxFloatSocket', self.get_variable_name(0), default_value=0.0)
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self.add_input('LnxFloatSocket', self.get_variable_name(1), default_value=0.0)
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def add_sockets(self):
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if self.num_params < 26:
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self.add_input('LnxFloatSocket', self.get_variable_name(self.num_params), default_value=0.0)
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self.num_params += 1
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self['property1'] = self.num_params
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def remove_sockets(self):
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if self.num_params > 0:
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self.inputs.remove(self.inputs.values()[-1])
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self.num_params -= 1
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self['property1'] = self.num_params
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def draw_buttons(self, context, layout):
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# Clamp Property
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layout.prop(self, 'property0')
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# Expression Property
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row = layout.row(align=True)
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column = row.column(align=True)
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# TODO:
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#column.alert = self['exp_error']
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column.prop(self, 'property2', icon='FORCE_HARMONIC')
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# Button ADD parameter
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row = layout.row(align=True)
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column = row.column(align=True)
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op = column.operator('lnx.node_call_func', text='Add Param', icon='PLUS', emboss=True)
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op.node_index = self.get_id_str()
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op.callback_name = 'add_sockets'
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if self.num_params == 26:
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column.enabled = False
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# Button REMOVE parameter
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column = row.column(align=True)
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op = column.operator('lnx.node_call_func', text='', icon='X', emboss=True)
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op.node_index = self.get_id_str()
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op.callback_name = 'remove_sockets'
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if self.num_params == 0:
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column.enabled = False
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