initial commit

README.md

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+# Add LaTeX expressions
+
+This addon adds the option of creating new curves from a latex expression.
+
+It has been tested only on linux so far.
+
+It requires a working latex installation and cairotopdf

__init__.py

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+import os
+import tempfile
+import bpy
+from mathutils import Vector
+
+
+bl_info = {
+	'name': 'LaTeX in Blender',
+	'description': "Create curves from latex expressions ",
+	'author': 'Miguel Marco',
+	'version': (0, 0, 0, 1),
+	'blender': (2, 83, 2),
+	'location': 'View3D > Add > Curve > LaTeX expression',
+	'warning': 'Depends on having latex and cairotopdf installes',
+	'support': 'COMMUNITY',
+	'category': 'AddCurve'}
+
+
+
+TEMPLATE = r"""\documentclass{standalone}
+\begin{document}
+$\displaystyle{ {{TEXT}} }$
+\end{document}"""
+
+class AddLatexCurve(bpy.types.Operator):
+    """Add a new curve from the latex command"""      # Use this as a tooltip for menu items and buttons.
+    bl_idname = "object.add_latex"        # Unique identifier for buttons and menu items to reference.
+    bl_label = "Add LaTeX Curve"         # Display name in the interface.
+    bl_options = {'REGISTER', 'UNDO'}  # Enable undo for the operator.
+
+    latex_string: bpy.props.StringProperty(name="String Value")
+
+    def execute(self, context):        # execute() is called when running the operator.
+
+        S = self.latex_string
+        print(TEMPLATE.replace('{{TEXT}}', S))
+        with tempfile.TemporaryDirectory() as td:
+            with open('{}/file.tex'.format(td),'w') as fd:
+                fd.write(TEMPLATE.replace('{{TEXT}}', S))
+            print("tex file created")
+            os.system('cd {} && pdflatex file.tex'.format(td))
+            print("pdf file created")
+            os.system('cd {} && pdftocairo -svg file.pdf file.svg '.format(td))
+            print("svg file created")
+            old_collections = bpy.data.collections.items()
+            bpy.ops.import_curve.svg(filepath='{}/file.svg'.format(td))
+            for Collection in bpy.data.collections.items():
+                if not Collection in old_collections:
+                    for Object in Collection[1].objects:
+                        Object.scale=Vector((500,500,500))
+
+        return {'FINISHED'}
+
+
+def menu_func(self, context):
+    layout = self.layout
+    layout.operator_context = 'INVOKE_REGION_WIN'
+    layout.separator()
+    oper = layout.operator("object.add_latex", text='LaTeX expression')
+    oper.change = False
+
+
+
+def register():
+    bpy.utils.register_class(AddLatexCurve)
+    bpy.types.VIEW3D_MT_curve_add.append(menu_func)
+
+
+def unregister():
+    bpy.types.VIEW3D_MT_curve_add.remove(menu_func)
+    bpy.utils.unregister_class(AddLatexCurve)
+
+if __name__ == "__main__":
+    register()
+