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authorTavian Barnes <tavianator@tavianator.com>2014-08-19 17:10:03 -0400
committerTavian Barnes <tavianator@tavianator.com>2015-10-25 11:03:56 -0400
commit7b09710392d35fb55b52031d447a542d99fc6b4b (patch)
tree270eb927ee8c52ceeb99926ebf4843704775a610 /libdimension/model/pigment.c
parent200c86b91ea7063d35be3bffc11c5da53c054653 (diff)
downloaddimension-7b09710392d35fb55b52031d447a542d99fc6b4b.tar.xz
Modularize the libdimension codebase.
Diffstat (limited to 'libdimension/model/pigment.c')
-rw-r--r--libdimension/model/pigment.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/libdimension/model/pigment.c b/libdimension/model/pigment.c
new file mode 100644
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+++ b/libdimension/model/pigment.c
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+/*************************************************************************
+ * Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> *
+ * *
+ * 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 *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+/**
+ * @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;
+ }
+}