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The script makes a camera ("Camera01") spinning around a null cube object ("Null01Cube01"). During the motion the camera will look at the null:the cube.
It is possible to specify the distance between camera and object, and the number of revolutions around the object during the simulation. With "orientation" the camera's rotation can be clockwise or counter-clockwise.
The script is for Y-based setups. If you have a Z-based axis setup you have to uncomment (remove the # characters) the appropriate code.
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import math
camera = scene.getCamera("SceneCamera01")
focusObject = scene.getObject("Cube01")
objectPosition = focusObject.getParameter("Position")
frame = scene.getCurrentFrame()
radius = 1.5
cycles = 3.0
verticalPosition = 0.5
orientation = 0
if (frame == scene.getMinFrame()):
camera.setParameter("LookAt", objectPosition)
if (orientation == 0): sign = 1
else : sign = -1
simRange = float(scene.getMaxFrames() - scene.getMinFrame()) - 1.0
degPerFrame = (360.0 / simRange) * cycles
radians = (sign * degPerFrame * math.pi / 180.0)
xCoord = math.cos(frame * radians) * radius + objectPosition.x
zCoord = math.sin(frame * radians) * radius + objectPosition.z
cameraPosition = Vector.new(xCoord, verticalPosition, zCoord)
# yCoord = math.sin(frame * radians) * radius + objectPosition.y
# cameraPosition = Vector.new(xCoord, yCoord, verticalPosition)
camera.setParameter("Position", cameraPosition) |