Name

ptran_point − Applies a 2D transformation matrix to a point. 

Operating States: PHOP, ∗, ∗, ∗
PHIGS standard function

Syntax

void ptran_point (
  const Ppoint   ∗pt,         /∗ (I) Coordinates of the input point ∗/
  Pmatrix         matrix,     /∗ (I) Transformation matrix ∗/
  Pint           ∗error_ind,  /∗ (O) Error indicator ∗/
  Ppoint         ∗new_pt      /∗ (O) Coordinates of the transformed
                                     point ∗/
)

Data Structures

typedef struct {
    Pfloat      x;      /∗ x coordinate ∗/
    Pfloat      y;      /∗ y coordinate ∗/
} Ppoint;
typedef Pfloat Pmatrix[3][3];

Description

ptran_point applies the specified two-dimensional (3 x 3) transformation matrix (as created, for example, with the pbuild_tran_matrix, protate, ptranslate, or pscale function) to a specified point.  It returns the resulting transformed point value. 

See Also

pbuild_tran_matrix
pcompose_matrix
pcompose_tran_matrix
protate
pscale
pset_local_tran3
ptran_point3
ptranslate