ascension: src/scene.c@45d29d7221cc (annotated)

src/scene.c@45d29d7221cc (annotated)

src/scene.c

Wed, 06 Mar 2024 23:12:56 +0100

author: Mike Becker <universe@uap-core.de>
date: Wed, 06 Mar 2024 23:12:56 +0100
changeset 34: 45d29d7221cc
parent 33: e7ddb52facd3
child 37: 8a8cc6725b48
permissions: -rw-r--r--

fix const-warning

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2023 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "ascension/scene.h"
 #include "ascension/error.h"
 #include <cx/tree.h>
 #include <assert.h>
 #define child_list_off_ \
     offsetof(AscSceneNode, children), offsetof(AscSceneNode, next)
 void asc_scene_init(AscScene *scene) {
     if (scene->root != NULL) {
         asc_error("Scene is already initialized.");
         return;
     }
     scene->root = asc_scene_node_empty();
 }
 void asc_scene_destroy(AscScene *scene) {
     asc_scene_node_free(scene->root);
 }
 void asc_scene_add(AscScene *scene, AscSceneNode *node) {
     asc_scene_node_link(scene->root, node);
     asc_node_update(node);
 }
 void asc_scene_draw(AscScene const *scene) {
     CxTreeIterator iter = cx_tree_iterator(scene->root, false, child_list_off_);
     // skip the root node deliberately, we know it's just the container
     cxIteratorNext(iter);
     // update the children
     cx_foreach(AscSceneNode*, node, iter) {
         // execute behaviors, first
         AscBehaviorNode *behavior = node->behaviors;
         while (behavior) {
             behavior->func(node);
             behavior = behavior->next;
         }
         // check if geometry needs update
         if (node->need_update && node->update_func != NULL) {
             node->need_update = false;
             asc_transform_copy(node->transform, node->parent->transform);
             node->update_func(node);
         }
         // TODO: don't visit the tree for drawing, visit the render groups
         if (node->draw_func != NULL) {
             node->draw_func(node);
         }
     }
 }
 AscSceneNode *asc_scene_node_empty(void) {
     AscSceneNode *node = calloc(1, sizeof(AscSceneNode));
     assert(node != NULL);
     node->free_func = (asc_scene_free_func) free;
     asc_transform_identity(node->transform);
     return node;
 }
 void asc_scene_node_free(AscSceneNode *node) {
     if (node == NULL) return;
     // remove this node from its parent
     asc_scene_node_unlink(node);
     // free the entire subtree
     CxTreeIterator iter = cx_tree_iterator(node, true, child_list_off_);
     cx_foreach(AscSceneNode*, child, iter) {
         if (!iter.exiting) continue;
         if (child->free_func != NULL) {
             child->free_func(child);
         } else {
             free(child);
         }
     }
 }
 void asc_scene_node_link(AscSceneNode * restrict parent, AscSceneNode * restrict node) {
     cx_tree_link(
             parent, node,
             offsetof(AscSceneNode, parent),
             offsetof(AscSceneNode, children),
             offsetof(AscSceneNode, prev),
             offsetof(AscSceneNode, next)
     );
 }
 void asc_scene_node_unlink(AscSceneNode *node) {
     cx_tree_unlink(
             node,
             offsetof(AscSceneNode, parent),
             offsetof(AscSceneNode, children),
             offsetof(AscSceneNode, prev),
             offsetof(AscSceneNode, next)
     );
 }
 AscBehaviorNode *asc_scene_add_behavior(AscSceneNode *node, asc_scene_update_func behavior) {
     AscBehaviorNode *behavior_node = calloc(1, sizeof(AscBehaviorNode));
     behavior_node->func = behavior;
     cx_tree_link(
             node,
             behavior_node,
             offsetof(AscBehaviorNode, parent),
             offsetof(AscSceneNode, behaviors),
             offsetof(AscBehaviorNode, prev),
             offsetof(AscBehaviorNode, next)
     );
     return behavior_node;
 }
 void asc_scene_remove_behavior(AscBehaviorNode *node) {
     cx_tree_unlink(
             node,
             offsetof(AscBehaviorNode, parent),
             offsetof(AscSceneNode, behaviors),
             offsetof(AscBehaviorNode, prev),
             offsetof(AscBehaviorNode, next)
     );
 }

Mercurial > hg > ascension / annotate

src/scene.c@45d29d7221cc (annotated)

src/scene.c