From d7e9d913730b96a83751863ad896648488296532 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Sat, 6 Nov 2010 16:57:33 -0400 Subject: Add pattern framework, impelement checker pattern. --- libdimension/pattern.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 libdimension/pattern.c (limited to 'libdimension/pattern.c') diff --git a/libdimension/pattern.c b/libdimension/pattern.c new file mode 100644 index 0000000..0be017f --- /dev/null +++ b/libdimension/pattern.c @@ -0,0 +1,56 @@ +/************************************************************************* + * Copyright (C) 2009-2010 Tavian Barnes * + * * + * This file is part of The Dimension Library. * + * * + * The Dimension Library is free software; you can redistribute it and/ * + * or modify it under the terms of the GNU Lesser General Public License * + * as published by the Free Software Foundation; either version 3 of the * + * License, or (at your option) any later version. * + * * + * The Dimension Library is distributed in the hope that it will be * + * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this program. If not, see * + * . * + *************************************************************************/ + +#include "dimension.h" + +/* Allocate a dummy pattern */ +dmnsn_pattern * +dmnsn_new_pattern(void) +{ + dmnsn_pattern *pattern = dmnsn_malloc(sizeof(dmnsn_pattern)); + pattern->trans = dmnsn_identity_matrix(); + pattern->free_fn = NULL; + return pattern; +} + +/* Delete a pattern */ +void +dmnsn_delete_pattern(dmnsn_pattern *pattern) +{ + if (pattern->free_fn) { + (*pattern->free_fn)(pattern->ptr); + } + dmnsn_free(pattern); +} + +/* Precompute the transformation matrix inverse */ +void +dmnsn_pattern_init(dmnsn_pattern *pattern) +{ + pattern->trans_inv = dmnsn_matrix_inverse(pattern->trans); +} + +/* Invoke the pattern callback with the right transformation */ +double +dmnsn_pattern_value(const dmnsn_pattern *pattern, dmnsn_vector v) +{ + v = dmnsn_transform_vector(pattern->trans_inv, v); + return (*pattern->pattern_fn)(pattern, v); +} -- cgit v1.2.3