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- /*
- * fbmbump.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: fbmbump.c,v 4.0 91/07/17 14:42:21 kolb Exp Locker: kolb $
- *
- * $Log: fbmbump.c,v $
- * Revision 4.0 91/07/17 14:42:21 kolb
- * Initial version.
- *
- */
- #include "texture.h"
- #include "fbm.h"
- #include "fbmbump.h"
-
- FBm *
- FBmBumpCreate(offset, scale, h, lambda, octaves)
- Float offset, h, lambda, scale;
- int octaves;
- {
- FBm *fbm;
- fbm = FBmCreate(offset, scale, h, lambda, octaves, 0., (char *)NULL);
- return fbm;
- }
-
- /*ARGSUSED*/
- void
- FBmBumpApply(fbm, prim, ray, pos, norm, gnorm, surf)
- FBm *fbm;
- Geom *prim;
- Ray *ray;
- Vector *pos, *norm, *gnorm;
- Surface *surf;
- {
- Vector disp;
-
- VfBm(pos, fbm->omega, fbm->lambda, fbm->octaves, &disp);
- norm->x += fbm->offset + disp.x * fbm->scale;
- norm->y += fbm->offset + disp.y * fbm->scale;
- norm->z += fbm->offset + disp.z * fbm->scale;
- }
-