shuiyu1123
d15a3947ab
- SceneNode: position/rotation(scale) + parent/child hierarchy - World matrix: local = translate * rotate * scale, world = parent.world * local - Euler/Quaternion rotation support - Dirty flag propagation for efficient updates - Scene init/find/create/destroy operations
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
#pragma once
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// ============================================================================
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// scene_graph.h - 场景图: 节点树 + 变换继承
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// ============================================================================
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#include "../ASM/math_c_fallback.h"
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#include <stdint.h>
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#define MAX_CHILDREN 64
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#define MAX_NODES 1024
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// 场景节点
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typedef struct SceneNode {
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int id;
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char name[64];
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// 本地变换
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Vec3 position;
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Quat rotation;
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Vec3 scale;
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// 世界矩阵 (每帧由 scene_update 计算)
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Mat4 world_matrix;
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Mat4 local_matrix;
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// 层级
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struct SceneNode* parent;
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struct SceneNode* children[MAX_CHILDREN];
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int child_count;
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// 标志
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int visible;
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int dirty; // 需要重新计算矩阵
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// 用户数据
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void* user_data;
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int user_type;
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} SceneNode;
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// 场景
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typedef struct Scene {
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SceneNode nodes[MAX_NODES];
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int node_count;
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SceneNode* root;
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int next_id;
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} Scene;
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// 初始化/销毁
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void scene_init(Scene* scene);
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void scene_destroy(Scene* scene);
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// 节点管理
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SceneNode* scene_create_node(Scene* scene, const char* name);
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void scene_destroy_node(Scene* scene, SceneNode* node);
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SceneNode* scene_find_node(Scene* scene, int id);
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SceneNode* scene_find_by_name(Scene* scene, const char* name);
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// 层级
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void scene_set_parent(SceneNode* child, SceneNode* parent);
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void scene_add_child(SceneNode* parent, SceneNode* child);
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void scene_remove_child(SceneNode* parent, SceneNode* child);
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// 变换
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void scene_set_position(SceneNode* node, float x, float y, float z);
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void scene_set_rotation_euler(SceneNode* node, float rx, float ry, float rz);
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void scene_set_scale(SceneNode* node, float sx, float sy, float sz);
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void scene_set_rotation_quat(SceneNode* node, const Quat* q);
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void scene_mark_dirty(SceneNode* node);
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// 每帧更新
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void scene_update(Scene* scene);
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// 获取世界变换
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void scene_get_world_position(SceneNode* node, Vec3* out);
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void scene_get_world_rotation(SceneNode* node, Quat* out);
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void scene_get_world_scale(SceneNode* node, Vec3* out);
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