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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/dimension/object.h
parent200c86b91ea7063d35be3bffc11c5da53c054653 (diff)
downloaddimension-7b09710392d35fb55b52031d447a542d99fc6b4b.tar.xz
Modularize the libdimension codebase.
Diffstat (limited to 'libdimension/dimension/object.h')
-rw-r--r--libdimension/dimension/object.h164
1 files changed, 0 insertions, 164 deletions
diff --git a/libdimension/dimension/object.h b/libdimension/dimension/object.h
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--- a/libdimension/dimension/object.h
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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
- * Objects.
- */
-
-#include <stdbool.h>
-
-/* Forward-declare dmnsn_object */
-typedef struct dmnsn_object dmnsn_object;
-
-/** A type to represent a ray-object intersection. */
-typedef struct dmnsn_intersection {
- dmnsn_line ray; /**< The ray that intersected. */
- double t; /**< The line index that intersected. */
-
- /** The surface normal at the intersection point. */
- dmnsn_vector normal;
-
- /** The object of intersection. */
- const dmnsn_object *object;
-} dmnsn_intersection;
-
-/**
- * Ray-object intersection callback.
- * @param[in] object The object to test.
- * @param[in] line The line to test.
- * @param[out] intersection Where to store the intersection details of the
- * closest (if any) intersection.
- * @return Whether \p line intersected \p object.
- */
-typedef bool dmnsn_object_intersection_fn(const dmnsn_object *object, dmnsn_line line, dmnsn_intersection *intersection);
-
-/**
- * Object inside callback.
- * @param[in] object The object to test.
- * @param[in] point The point to test.
- * @return Whether \p point is inside \p object.
- */
-typedef bool dmnsn_object_inside_fn(const dmnsn_object *object, dmnsn_vector point);
-
-/**
- * Object bounding callback.
- * @param[in,out] object The object to bound.
- * @param[in,out] trans The effective transformation for the object.
- */
-typedef dmnsn_bounding_box dmnsn_object_bounding_fn(const dmnsn_object *object, dmnsn_matrix trans);
-
-/**
- * Object precomputation callback.
- * @param[in,out] object The object to precompute.
- */
-typedef void dmnsn_object_precompute_fn(dmnsn_object *object);
-
-/** Object callbacks. */
-typedef struct dmnsn_object_vtable {
- dmnsn_object_intersection_fn *intersection_fn; /**< Intersection callback. */
- dmnsn_object_inside_fn *inside_fn; /**< Inside callback. */
- dmnsn_object_bounding_fn *bounding_fn; /**< Bounding callback. */
- dmnsn_object_precompute_fn *precompute_fn; /**< Precomputation callback. */
-} dmnsn_object_vtable;
-
-/** An object. */
-struct dmnsn_object {
- const dmnsn_object_vtable *vtable; /**< Callbacks. */
-
- dmnsn_texture *texture; /**< Surface properties. */
- dmnsn_interior *interior; /**< Interior properties. */
-
- dmnsn_matrix trans; /**< Transformation matrix. */
- dmnsn_matrix intrinsic_trans; /**< Transformations intrinsic to the object. */
-
- dmnsn_array *children; /**< Child objects. */
- bool split_children; /**< Whether the child objects can be split. */
-
- /* Precomputed values */
- bool precomputed; /**< @internal Whether the object is precomputed yet. */
- dmnsn_matrix trans_inv; /**< Inverse of the transformation matrix. */
- dmnsn_matrix pigment_trans; /**< Inverse transformation for the texture. */
- dmnsn_bounding_box bounding_box; /**< Bounding box in world coordinates. */
-};
-
-/**
- * Allocate a dummy object.
- * @param[in] pool The memory pool to allocate from.
- * @return The allocated object.
- */
-dmnsn_object *dmnsn_new_object(dmnsn_pool *pool);
-
-/**
- * Initialize a dmnsn_object field.
- * @param[out] object The object to initialize.
- */
-void dmnsn_init_object(dmnsn_object *object);
-
-/**
- * Precompute values for an object and its children.
- * @param[in,out] object The object to precompute.
- */
-void dmnsn_object_precompute(dmnsn_object *object);
-
-/**
- * Appropriately transform a ray, then test for an intersection.
- * @param[in] object The object to test.
- * @param[in] line The ray to test.
- * @param[out] intersection Where to store the intersection details.
- * @return Whether there was an intersection.
- */
-DMNSN_INLINE bool
-dmnsn_object_intersection(const dmnsn_object *object, dmnsn_line line,
- dmnsn_intersection *intersection)
-{
- dmnsn_line line_trans = dmnsn_transform_line(object->trans_inv, line);
- intersection->object = NULL;
- if (object->vtable->intersection_fn(object, line_trans, intersection)) {
- /* Get us back into world coordinates */
- intersection->ray = line;
- intersection->normal = dmnsn_vector_normalized(
- dmnsn_transform_normal(object->trans_inv, intersection->normal)
- );
- if (!intersection->object) {
- intersection->object = object;
- }
-
- dmnsn_assert(!dmnsn_isnan(intersection->t), "Intersection point is NaN.");
- dmnsn_assert(!dmnsn_vector_isnan(intersection->normal), "Intersection normal is NaN.");
-
- return true;
- } else {
- return false;
- }
-}
-
-/**
- * Appropriately transform a point, then test for containment.
- * @param[in] object The object to test.
- * @param[in] point The point to test.
- * @return Whether \p point was inside \p object.
- */
-DMNSN_INLINE bool
-dmnsn_object_inside(const dmnsn_object *object, dmnsn_vector point)
-{
- point = dmnsn_transform_point(object->trans_inv, point);
- return object->vtable->inside_fn(object, point);
-}