20 Transforming Points and Vectors
Q3Point2D_Transform
function to apply a transform to a two-dimensional point.
TQ3Point2D *Q3Point2D_Transform ( const TQ3Point2D *point2D, const TQ3Matrix3x3 *matrix3x3, TQ3Point2D *result);point2D
A two-dimensional point.matrix3x3
A 3-by-3 matrix.result
On exit, the point that is the result of multiplyingpoint2D
bymatrix3x3
.
Q3Point2D_Transform
function returns, as its function result and in the result
parameter, the point that is the result of multiplying the point point2D
by the matrix transform matrix3x3
. Note that on entry the result
parameter can be the same as the point2D
parameter.
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