Shader program using Function instances as basis for its shaders. Automatically rebuilds program when functions have changed and uploads program variables.
| 17 | |
| 18 | |
| 19 | class ModularProgram(Program): |
| 20 | """ |
| 21 | Shader program using Function instances as basis for its shaders. |
| 22 | |
| 23 | Automatically rebuilds program when functions have changed and uploads |
| 24 | program variables. |
| 25 | """ |
| 26 | |
| 27 | def __init__(self, vcode='', fcode='', gcode=None): |
| 28 | Program.__init__(self) |
| 29 | |
| 30 | self.changed = EventEmitter(source=self, type='program_change') |
| 31 | |
| 32 | # Cache state of Variables so we know which ones require update |
| 33 | self._variable_cache = WeakKeyDictionary() |
| 34 | |
| 35 | # List of settable variables to be checked for value changes |
| 36 | self._variables = [] |
| 37 | |
| 38 | self._vert = MainFunction('vertex', '') |
| 39 | self._frag = MainFunction('fragment', '') |
| 40 | self._vert._dependents[self] = None |
| 41 | self._frag._dependents[self] = None |
| 42 | self._geom = None |
| 43 | |
| 44 | self.vert = vcode |
| 45 | self.frag = fcode |
| 46 | self.geom = gcode |
| 47 | |
| 48 | @property |
| 49 | def vert(self): |
| 50 | return self._vert |
| 51 | |
| 52 | @vert.setter |
| 53 | def vert(self, vcode): |
| 54 | vcode = preprocess(vcode) |
| 55 | self._vert.code = vcode |
| 56 | self._need_build = True |
| 57 | self.changed(code_changed=True, value_changed=False) |
| 58 | |
| 59 | @property |
| 60 | def frag(self): |
| 61 | return self._frag |
| 62 | |
| 63 | @frag.setter |
| 64 | def frag(self, fcode): |
| 65 | fcode = preprocess(fcode) |
| 66 | self._frag.code = fcode |
| 67 | self._need_build = True |
| 68 | self.changed(code_changed=True, value_changed=False) |
| 69 | |
| 70 | @property |
| 71 | def geom(self): |
| 72 | return self._geom |
| 73 | |
| 74 | @geom.setter |
| 75 | def geom(self, gcode): |
| 76 | if gcode is None: |
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