== python api doc ==

First commit to make some structure in doc/ directory.

- moved source/blender/python/doc -> doc/python_api
- moved source/gameengine/PyDoc/*.rst -> doc/python_api/rst
- modified accordingly sphinx_doc_gen.py and sphinx_doc_gen.sh
  (later on I'll try alternative/ scripts by neXyon as promised :)
- source/gameengine/PyDoc/ is still there because contains epydoc stuff for the bge, will ask more and look into it later

doc/python_api/examples/bpy.data.py

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+import bpy
+
+
+# print all objects
+for obj in bpy.data.objects:
+    print(obj.name)
+
+
+# print all scene names in a list
+print(bpy.data.scenes.keys())
+
+
+# remove mesh Cube
+if "Cube" in bpy.data.meshes:
+    mesh = bpy.data.meshes["Cube"]
+    print("removing mesh", mesh)
+    bpy.data.meshes.unlink(mesh)
+
+
+# write images into a file next to the blend
+import os
+file = open(os.path.splitext(bpy.data.filepath)[0] + ".txt", 'w')
+
+for image in bpy.data.images:
+    file.write("%s %dx%d\n" % (image.filepath, image.size[0], image.size[1]))
+
+file.close()
+
+

doc/python_api/examples/mathutils.Euler.py

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+import mathutils
+
+# todo

doc/python_api/examples/mathutils.Matrix.py

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+import mathutils
+
+# todo

doc/python_api/examples/mathutils.Quaternion.py

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+import mathutils
+
+# todo

doc/python_api/examples/mathutils.Vector.py

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+import mathutils
+
+# zero length vector
+vec = mathutils.Vector((0, 0, 1))
+
+# unit length vector
+vec_a = vec.copy().normalize()
+
+vec_b = mathutils.Vector((0, 1, 2))
+
+vec2d = mathutils.Vector((1, 2))
+vec3d = mathutils.Vector((1, 0, 0))
+vec4d = vec_a.copy().resize4D()
+
+# other mathutuls types
+quat = mathutils.Quaternion()
+matrix = mathutils.Matrix()
+
+# Comparison operators can be done on Vector classes:
+
+# greater and less then test vector length.
+vec_a > vec_b
+vec_a >= vec_b
+vec_a < vec_b
+vec_a <= vec_b
+
+# ==, != test vector values e.g. 1,2,3 != 3,2,1 even if they are the same length
+vec_a == vec_b
+vec_a != vec_b
+
+
+# Math can be performed on Vector classes
+vec_a + vec_b
+vec_a - vec_b
+vec_a * vec_b
+vec_a * 10.0
+vec_a * matrix
+vec_a * vec_b
+vec_a * quat
+-vec_a
+
+
+# You can access a vector object like a sequence
+x = vec_a[0]
+len(vec)
+vec_a[:] = vec_b
+vec2d[:] = vec3d[:2]
+
+
+# Vectors support 'swizzle' operations
+# See http://en.wikipedia.org/wiki/Swizzling_(computer_graphics)
+vec.xyz = vec.zyx
+vec.xy = vec4d.zw
+vec.xyz = vec4d.wzz
+vec4d.wxyz = vec.yxyx

doc/python_api/examples/mathutils.py

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+import mathutils
+from math import radians
+
+vec = mathutils.Vector((1.0, 2.0, 3.0))
+
+mat_rot = mathutils.Matrix.Rotation(radians(90), 4, 'X')
+mat_trans = mathutils.Matrix.Translation(vec)
+
+mat = mat_trans * mat_rot
+mat.invert()
+
+mat3 = mat.rotation_part()
+quat1 = mat.to_quat()
+quat2 = mat3.to_quat()
+
+angle = quat1.difference(quat2)
+
+print(angle)