In the y - direction a similar equation applies 在y方向有类似的公式。
Translate 3 units in the y direction 在y方向上平移3个单位
Scale factor in the y direction Y方向的比例因子。
For simplicity , we assume e to be in the x direction and to vary sinusoidally in the y direction 为简单起见,我们假定e在x方向上,并在y方向上正弦式地变化。
In the preceding example , the world transformation is a translation 100 units in the x direction and 50 units in the y direction 在前面的示例中,世界变换是在x方向平移100个单位、在y方向平移50个单位。
The transformation first scales by a factor of 0 . 5 in the y direction , then translates 50 units in the x direction , and then rotates 30 degrees 变换首先在y方向上缩放0 . 5倍,再在x方向平移50个单位,然后旋转30度。
Suppose you want to start with the point 2 , 1 , rotate it 90 degrees , translate it 3 units in the x direction , and translate it 4 units in the y direction 假定您要从点( 2 , 1 )开始,将其旋转90度,在x方向将其平移3个单位,在y方向将其平移4个单位。
The following example creates the matrix of a composite transformation that first rotates 30 degrees , then scales by a factor of 2 in the y direction , and then translates 5 units in the x direction 下面的示例创建了复合变换(先旋转30度,再在y方向上缩放2倍,然后在x方向平移5个单位)的矩阵。
The following illustration shows an affine transformation rotate 90 degrees ; translate 3 units in the x direction , 4 units in the y direction expressed as multiplication by a single 33 matrix 下图演示了表示为与单个33矩阵相乘的仿射变换(旋转90度;在x方向上平移3个单位,在y方向上平移4个单位) 。
Based on this , the optimum operating mode of ln anisotropic one - dimension aeo device is determined as : light promulgates along z axis , ultrasonic wave promulgates along x axis , and direct current electric field is loaded along y axis 经过计算,一维铌酸锂反常声电光器件的最优化工作模式为:光沿着z轴方向,直流电场沿y方向,超声波为沿着x轴方向的快切变波模式。