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from gem import matrix |
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from ed2d import idgen |
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4
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class BaseNode(object): |
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def __init__(self, obj): |
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self.nodeID = None |
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self.isRoot = False |
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self.root = None |
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self.parent = None |
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self.children = [self] |
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self.obj = obj |
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def attach(self, parent): |
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self.root = parent.root |
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self.parent = parent |
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nodeID = self.root.add_tree_child(self) |
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self.nodeID = nodeID |
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self.parent.children.append(self) |
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return nodeID |
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def detach(self): |
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self.parent.children.remove(self) |
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self.root.del_tree_child(self) |
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self.parent = None |
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self.root = None |
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self.nodeID = None |
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def recurse(self, callback): |
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for i in self.children[1:]: |
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callback(self, i) |
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i.recurse(callback) |
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def recurse_up(self, callback): |
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callback(self) |
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if not self.parent.isRoot: |
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self.parent.recurse_up(callback) |
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def reparent(self, parent): |
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self.detach() |
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self.attach(parent) |
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42
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def __repr__(self): |
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templ = (type(self).__name__, self.nodeID, hex(id(self))) |
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return "<SceneGraph {0} (NodeID {1}) object at {2}>".format(*templ) |
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46
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class RootNode(BaseNode): |
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def __init__(self, obj): |
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self.nodeID = 0 |
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self.treeChildren = [self] |
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self.children = [self] |
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self.root = self |
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self.isRoot = True |
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54
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self.ids = idgen.IdGenerator() |
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def reparent(self, parent): |
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print('Error can\'t reparent root node.') |
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def attach(self, parent): |
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print('Error can\'t attach root node.') |
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def dettach(self, parent): |
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print('Error can\'t dettach root node.') |
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64
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65
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def add_tree_child(self, obj): |
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nodeID = self.ids.gen_id() |
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68
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idgen.set_uid_list(self.treeChildren, nodeID, obj) |
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return nodeID |
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def del_tree_child(self, obj): |
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nodeID = obj.nodeID |
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self.treeChildren[nodeID] = None |
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obj.nodeID = None |
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self.ids.del_id(nodeID) |
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78
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79
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class GraphicsNode(BaseNode): |
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def __init__(self, obj, matrix=None): |
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super(GraphicsNode, self).__init__(obj) |
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if matrix is None: |
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self.matrix = matrix.Matrix(4) |
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else: |
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self.matrix = matrix |
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self.appliedMatrix = self.matrix |
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88
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def bind_matrix(self, matrix): |
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self.matrix = matrix |
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90
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91
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class SceneGraph(object): |
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def __init__(self): |
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self.root = RootNode(None) |
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self.root.matrix = matrix.Matrix(4) |
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self.root.appliedMatrix = self.root.matrix |
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97
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def establish(self, obj, parent=None): |
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if hasattr(obj, 'matrix'): |
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node = GraphicsNode(obj, obj.matrix) |
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else: |
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node = GraphicsNode(obj) |
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if parent is None: |
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parent = self.root |
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else: |
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parent = self.aquire(parent) |
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nodeID = node.attach(parent) |
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return nodeID |
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110
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def reparent(self, nodeID, parentID): |
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node = self.aquire(nodeID) |
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parent = self.aquire(parentID) |
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node.reparent(parent) |
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114
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115
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def aquire(self, nodeID): |
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return self.root.treeChildren[nodeID] |
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118
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def aquire_root(self): |
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return self.root |
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120
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121
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@classmethod |
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122
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def _recurse_update(self, parent, obj): |
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obj.obj.update() |
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obj.matrix = obj.obj.matrix |
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obj.appliedMatrix = parent.appliedMatrix * obj.matrix |
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127
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def update(self): |
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128
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self.root.recurse(self._recurse_update) |
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129
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130
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@classmethod |
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131
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def _recurse_render(self, parent, obj): |
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obj.obj.render() |
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133
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134
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def render(self): |
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135
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self.root.recurse(self._recurse_render) |
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136
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explosiveduck /
ed2d
