comparison: src/scene.c
src/scene.c
- changeset 21
- 1a47c57666f5
- child 27
- 4ccf4703999e
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| 20:b101c1ef13c7 | 21:1a47c57666f5 |
|---|---|
| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * Copyright 2023 Mike Becker. All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 25 * POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include "ascension/scene.h" | |
| 29 #include "ascension/error.h" | |
| 30 | |
| 31 #include <cx/linked_list.h> | |
| 32 #include <assert.h> | |
| 33 | |
| 34 void asc_scene_init(AscScene *scene) { | |
| 35 if (scene->root != NULL) { | |
| 36 asc_error("Scene is already initialized."); | |
| 37 return; | |
| 38 } | |
| 39 scene->root = asc_scene_node_create(NULL); | |
| 40 } | |
| 41 | |
| 42 void asc_scene_destroy(AscScene *scene) { | |
| 43 asc_scene_node_free(scene->root); | |
| 44 } | |
| 45 | |
| 46 AscSceneNode *asc_scene_node_create(AscSceneNode *parent) { | |
| 47 AscSceneNode *node = malloc(sizeof(AscSceneNode)); | |
| 48 assert(node != NULL); | |
| 49 node->children = cxLinkedListCreateSimple(CX_STORE_POINTERS); | |
| 50 assert(node->children != NULL); | |
| 51 node->parent = NULL; | |
| 52 asc_scene_node_link(node, parent); | |
| 53 return node; | |
| 54 } | |
| 55 | |
| 56 void asc_scene_node_free(AscSceneNode *node) { | |
| 57 if (node == NULL) return; | |
| 58 while (cxListSize(node->children) > 0) { | |
| 59 AscSceneNode *child = cxListAt(node->children, 0); | |
| 60 asc_scene_node_free(child); | |
| 61 } | |
| 62 if (node->parent != NULL) { | |
| 63 cxListFindRemove(node->parent->children, node); | |
| 64 } | |
| 65 free(node); | |
| 66 } | |
| 67 | |
| 68 void asc_scene_node_link( | |
| 69 AscSceneNode *node, | |
| 70 AscSceneNode *parent | |
| 71 ) { | |
| 72 if (node->parent == parent) return; | |
| 73 if (node->parent != NULL || parent == NULL) asc_scene_node_unlink(node); | |
| 74 if (parent != NULL) { | |
| 75 cxListAdd(parent->children, node); | |
| 76 node->parent = parent; | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 void asc_scene_node_unlink(AscSceneNode *node) { | |
| 81 if (node->parent == NULL) return; | |
| 82 cxListFindRemove(node->parent->children, node); | |
| 83 node->parent = NULL; | |
| 84 } |
