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eyes:coordinatesandconventions [2017/06/08 10:38]
jschlie1
eyes:coordinatesandconventions [2017/06/08 10:46]
jschlie1
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-======The CowEyes Coordinate System====== +====== The CowEyes Coordinate System====== 
- +===== General definitions ===== 
-The cow coordinate system is a right handed coordinate system, where looking on the screen the x-axis points to the right, the y-axis points ​down and the z axis point into the screen. ​+The cow coordinate system is a right handed coordinate system, where - while looking on the screen ​the x-axis points to the right, the y-axis points ​downwards ​and the z-axis point into the screen ​away from the user
  
 {{:​eyes:​coordinatesystem.png}} ​ {{:​eyes:​coordinatesystem.png}} ​
  
-The rotation of an object is defined as a counterclockwise ​rotation. However since the coordinate system is viewed from the back the rotation appears as what is normally known as clockwise.+The rotation of an object is defined as a counter clockwise ​rotation. Howeversince the coordinate system is viewed from the backthe rotation appears as what is normally known as clockwise.
  
 {{:​eyes:​counterclockwise.png}} ​   {{:​eyes:​counterclockwise.png}} ​  
  
- +===== Rotation Conventions ===== 
-====== Rotation Conventions ​and Coordinate system ====== +==== Coordinate System with Rotation ====
-===== Coordinate System with Rotation ​=====+
 {{:​eyes:​coordinatesystemrotation.png}} {{:​eyes:​coordinatesystemrotation.png}}
  
 Shown is the Coordinate system with rotation directions. Shown is the Coordinate system with rotation directions.
  
-===== Image Placement ​=====+==== Image Placement ====
 {{:​eyes:​imagecoordinatesystem.png}} {{:​eyes:​imagecoordinatesystem.png}}
  
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 The rotation center is marked in the middle of the image. The rotation center is marked in the middle of the image.
  
-===== Definition of Coordinate Axes: =====+==== Definition of Coordinate Axes: ====
   * X-Axis (Axis of abscissas) from left to right   * X-Axis (Axis of abscissas) from left to right
   * Y-Axis (Axis of ordinates) from top to bottom   * Y-Axis (Axis of ordinates) from top to bottom
   * Z-Axis (Axis of applicants) from front to back   * Z-Axis (Axis of applicants) from front to back
  
-===== Euler Convention: ​=====+==== Euler Convention: ====
 **ZXZs** **ZXZs**
  
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   - Gamma (γ) rotation around static global Z-Axis   - Gamma (γ) rotation around static global Z-Axis
  
-===== Rotation: ​=====+==== Rotation: ====
   * Rotations use the right hand thumb rule.   * Rotations use the right hand thumb rule.
   * If right thumb points along an axis, then curved fingers point in the positive direction of rotation.   * If right thumb points along an axis, then curved fingers point in the positive direction of rotation.
   * The rotation center is the center of the image.   * The rotation center is the center of the image.