From 7b09710392d35fb55b52031d447a542d99fc6b4b Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 19 Aug 2014 17:10:03 -0400 Subject: Modularize the libdimension codebase. --- libdimension/model/pigment.c | 72 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 libdimension/model/pigment.c (limited to 'libdimension/model/pigment.c') diff --git a/libdimension/model/pigment.c b/libdimension/model/pigment.c new file mode 100644 index 0000000..a8c7c0b --- /dev/null +++ b/libdimension/model/pigment.c @@ -0,0 +1,72 @@ +/************************************************************************* + * Copyright (C) 2009-2014 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 * + * . * + *************************************************************************/ + +/** + * @file + * Pigments. + */ + +#include "dimension/model.h" + +// Allocate a dummy pigment +dmnsn_pigment * +dmnsn_new_pigment(dmnsn_pool *pool) +{ + dmnsn_pigment *pigment = DMNSN_PALLOC(pool, dmnsn_pigment); + dmnsn_init_pigment(pigment); + return pigment; +} + +// Initialize a pigment +void +dmnsn_init_pigment(dmnsn_pigment *pigment) +{ + pigment->pigment_fn = NULL; + pigment->initialize_fn = NULL; + pigment->trans = dmnsn_identity_matrix(); + pigment->quick_color = DMNSN_TCOLOR(dmnsn_black); + pigment->initialized = false; +} + +// Precompute pigment properties +void +dmnsn_pigment_initialize(dmnsn_pigment *pigment) +{ + dmnsn_assert(!pigment->initialized, "Pigment double-initialized."); + pigment->initialized = true; + + if (pigment->initialize_fn) { + pigment->initialize_fn(pigment); + } + + pigment->trans_inv = dmnsn_matrix_inverse(pigment->trans); +} + +// Evaluate a pigment +dmnsn_tcolor +dmnsn_pigment_evaluate(const dmnsn_pigment *pigment, dmnsn_vector v) +{ + if (pigment->pigment_fn) { + dmnsn_vector v_trans = dmnsn_transform_point(pigment->trans_inv, v); + return pigment->pigment_fn(pigment, v_trans); + } else { + return pigment->quick_color; + } +} -- cgit v1.2.3