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1 # super rough code
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2
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3 # The magic value
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4 NoChange = "NoChange"
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5
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6 class NodeType:
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7 def __init__(self, iports=None, oports=None):
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8 make_attributes_from_args('iports', 'oports')
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9 def process(self,iports,oports):
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10 pass
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11 # TODO: handle NoChange stuff
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12
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13 class AddNode(NodeType):
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14 """Adds two nodes together"""
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15 def __init__(self):
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16 NodeType.__init__(self, iports={'in1' : Port, 'in2' : Port},
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17 oports={'out1' : Port})
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18 def process(self, ports):
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19 ports.out1 = ports.in1 + ports.in2
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20
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21 class SumNode(NodeType):
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22 """Adds any number of nodes together"""
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23 def __init__(self, empty_val=0):
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24 NodeType.__init__(self, iports={'in1' : MultiPort},
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25 oports={'out1' : Port})
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26 self.empty_val = 0
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27 def process(self, ports):
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28 val = self.empty_val
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29 for p in ports.in1:
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30 val += p
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31
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32 ports.out1 = val
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33
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34 class FadeNode(NodeType):
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35 """Provides a UI scaler to let you fade a value"""
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36 def __init__(self):
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37 NodeType.__init__(self, iports={'in1' : Port(),
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38 'scale1' : Port()},
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39 oports={'out1' : Port()},
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40 def process(self, iports, oports):
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41 ports.out1 = ports.in1 * ports.scale1
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42
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43 class FadeConstellation(Constellation):
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44 """This somehow describes the following:
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45
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46 [ ] [ UI.Scale ]
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47 | |
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48 | in | scale
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49 | ____ /
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50 | |
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51 [ FadeNode ]
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52 |
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53 | out
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54 |
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55 [ ]
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56
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57 Maybe this is a group (I like this more):
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58
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59 |
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60 | in
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61 | FadeGroup
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62 - - - - - - - - - - - - -- - -
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63 | | |
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64 | [ UI.Scale ]
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65 | | | |
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66 | in | scale
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67 | | ____ / |
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68 | |
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69 | [ FadeNode ] |
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70 |
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71 | | out |
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72 |
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73 \ - - - - - - - - - - - -- - - /
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74 |
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75 | out
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76 |
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77 """
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78
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79 Persistence
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80 node instance saves:
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81 node name, id, and such
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82 input ports:
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83 any port details
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84 what the port connects to
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85 values:
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86 maybe UI.Scale level
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87 maybe group contents
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88
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89
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90 p=InputPort(node=self,minconns=1,maxconns=2) # an input port to this node
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91 p.connect(othernode)
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92 print p.connections()
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93 p.connect(yetanother)
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94
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95 op=OutputPort(node=self) # an output port
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96 print op.connections() # lists all the nodes that call us an input node
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97 op.connect(n) # calls n.connect(self)
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98
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99
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100
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101
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102 Ports
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103 Port: "scalar"
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104 MultiPort: "array of Port"
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105 ^ all wrong
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106
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107 Ports II:
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108 min/max number of connections
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109 (failure to fit these numbers means port is "deactivated")
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110 "Normal" ports are min=1, max=1
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111 "Multiports" are min=0, max=None
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112 "Binary" ports are min=2, max=2
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113 oh yeah, there are two totally different types of ports
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114
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115 Input ports: min/max numbers of connections
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116 store current connections
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117 Output ports: nothing
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118 store nothing!
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119
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120 fake node persistence for subtract node
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121
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122 <!-- "my subtract" is a unique id -->
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123 <!-- drew: there is no such thing as a subtract group -->
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124 <node name="my subtract" type="math.Add">
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125 <inputs>
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126 <port name="in1">
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127 <noderef name="node I"/>
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128 <noderef name="node II"/>
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129 </port>
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130 </inputs>
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131 <state>
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132 </state>
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133
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134 </node>
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135
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136
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137 <node name="the group" type="group">
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138
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139 <!-- all of the port names of the group are being made up right
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140 here- a group has no preset inputs or outputs-->
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141
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142 <inputs>
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143 <port name="group-in 1">
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144 <noderef name="node5"/>
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145 <noderef name="node6"/>
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146 </port>
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147 </inputs>
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148
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149 <state>
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150 <children>
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151 <noderef name="node3">
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152 <connect localPort="in1" groupPort="group-in1"/>
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153 </noderef>
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154 <noderef name="node4">
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155 <connect localPort="in1" groupPort="group-in1"/>
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156 <connect localPort="out1" groupPort="theoutput"/>
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157 </noderef>
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158 </children>
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159
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160 </state>
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161 </node>
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162
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163 <node name="preset value" type="source.Scalar">
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164 <!-- no inputs, node has output only -->
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165 <state>
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166 <value>8.3</value>
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167
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168 <minvalue>0</minvalue>
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169 <maxvalue>100</maxvalue>
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170
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171 <gui>
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172 <slider res=".1" height="200" bgcolor="red"/>
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173 <priority>very high</priority>
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174 <xpos>395</xpos>
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175 <ypos>21</ypos>
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176 </gui>
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177
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178 </state>
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179
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180 </node>
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