home *** CD-ROM | disk | FTP | other *** search
- /*
- * translate.c
- *
- * Copyright (C) 1989, 1991, Craig E. Kolb
- * All rights reserved.
- *
- * This software may be freely copied, modified, and redistributed
- * provided that this copyright notice is preserved on all copies.
- *
- * You may not distribute this software, in whole or in part, as part of
- * any commercial product without the express consent of the authors.
- *
- * There is no warranty or other guarantee of fitness of this software
- * for any purpose. It is provided solely "as is".
- *
- * $Id: translate.c,v 4.0 91/07/17 14:32:42 kolb Exp Locker: kolb $
- *
- * $Log: translate.c,v $
- * Revision 4.0 91/07/17 14:32:42 kolb
- * Initial version.
- *
- */
- #include "common.h"
- #include "translate.h"
-
- TransMethods *iTranslateMethods;
- void TranslationMatrix();
-
- Translate *
- TranslateCreate()
- {
- Translate *res;
-
- res = (Translate *)RayMalloc(sizeof(Translate));
- res->x = res->y = res->z = 0.;
- return res;
- }
-
- TransMethods *
- TranslateMethods()
- {
- if (iTranslateMethods == (TransMethods *)NULL) {
- iTranslateMethods = (TransMethods *)RayMalloc(sizeof(TransMethods));
- iTranslateMethods->create = (TransCreateFunc *)TranslateCreate;
- iTranslateMethods->propagate = TranslatePropagate;
- }
- return iTranslateMethods;
- }
-
- void
- TranslatePropagate(translate, trans, itrans)
- Translate *translate;
- RSMatrix *trans, *itrans;
- {
- TranslationMatrix(translate->x, translate->y, translate->z, trans);
- /*
- * Build the inverse...
- */
- MatrixInit(itrans);
- itrans->translate.x = -translate->x;
- itrans->translate.y = -translate->y;
- itrans->translate.z = -translate->z;
- }
-
- void
- TranslationMatrix(x, y, z, mat)
- Float x, y, z;
- RSMatrix *mat;
- {
- MatrixInit(mat);
- mat->translate.x = x;
- mat->translate.y = y;
- mat->translate.z = z;
- }
-