Setting Up Transformation Matrices
QuickDraw 3D provides routines that you can use to configure matrices to be used as geometric transformations. You must already have allocated the memory for a matrix before calling one of these routines.All functions operating on 3-by-3 matrices assume that the resulting transform matrices are to be used to transform only homogeneous two-dimensional data types (such as
TQ3RationalPoint3D). Similarly, all functions operating on 4-by-4 matrices assume that the resulting transform matrices are to be used to transform only homogeneous three-dimensional data types (such asTQ3RationalPoint4D).You specify an angle (for example, for
Q3Matrix3x3_SetRotateAboutPoint) by passing a value that is interpreted in radians. If you prefer to use degrees, QuickDraw 3D provides C language macros that convert radians into degrees.
Subtopics
- Q3Matrix3x3_SetTranslate
- Q3Matrix3x3_SetScale
- Q3Matrix3x3_SetRotateAboutPoint
- Q3Matrix4x4_SetTranslate
- Q3Matrix4x4_SetScale
- Q3Matrix4x4_SetRotateAboutPoint
- Q3Matrix4x4_SetRotateAboutAxis
- Q3Matrix4x4_SetRotate_X
- Q3Matrix4x4_SetRotate_Y
- Q3Matrix4x4_SetRotate_Z
- Q3Matrix4x4_SetRotate_XYZ
- Q3Matrix4x4_SetRotateVectorToVector
- Q3Matrix4x4_SetQuaternion