cinema4dのcameraの情報をjsonに書き出す

camjson.py

import c4d
import json
import os
from c4d import Quaternion

path = ""
fps = doc[c4d.DOCUMENT_FPS]
filename = os.path.normpath(doc.GetDocumentPath())+"/cam.json"

def main():
    
    with open(filename, 'r') as f:
        dic = json.load(f)

    frames = dic["frames"]
    currentFrame=doc.GetTime().GetFrame(doc.GetFps())
    print "==" + str(currentFrame)
    cam = op.GetObject()

    if len(frames) <= currentFrame:
        frames.append({})

    frames[currentFrame] = {
        "frame": currentFrame,
        "q": toQuaternion( cam.GetMg() ),
        "x": cam[c4d.ID_BASEOBJECT_REL_POSITION,c4d.VECTOR_X],
        "y": cam[c4d.ID_BASEOBJECT_REL_POSITION,c4d.VECTOR_Y],
        "z": -cam[c4d.ID_BASEOBJECT_REL_POSITION,c4d.VECTOR_Z],
        "fov": cam[c4d.CAMERA_FOCUS]
    }

    print toQuaternion( cam.GetMg() ) 


    #hozon
    with open(filename, 'w') as f:
        json.dump(dic, f, sort_keys=True, indent=4)
    
    
def toMatrix(mg):
    v1, v2, v3, off = mg.v1, mg.v2, mg.v3, mg.off

    return [
        v1.x, v1.y, -v1.z,
        v2.x, v2.y, -v2.z,
        v3.x, v3.y, -v3.z,
        off.x, off.y, -off.z,
    ]
    
    
def toQuaternion(mg):
    q = Quaternion()
    q.SetMatrix( mg )
    return [
        q.v.x,
        q.v.y,
        -q.v.z,
        q.w 
    ]