ZZY
5ce660e3a6
- 新增游戏引擎核心模块，包括初始化和运行逻辑 - 实现基本的渲染功能，支持控制台输出 - 添加物理引擎基础，包括碰撞检测 - 集成日志系统，用于调试和信息输出 - 创建窗口和输入管理模块
59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
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#include "ge_physics.h"
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#include "ge_collision_box.h"
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typedef struct {
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ge_vector2i_t position;
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ge_vector2i_t size;
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ge_int_t tile_size;
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ge_phy_layers_t* layers; // 二维layer数组
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} ge_phy_tilemap_t;
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static inline int check_tilemap_collision(ge_phy_tilemap_t* tilemap, ge_phy_box_t* entity_collision) {
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Assert(tilemap->tile_size > 0);
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const int tile_size_int = tilemap->tile_size;
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// 计算瓦片地图的网格尺寸（列数和行数）
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const int grid_cols = tilemap->size.x / tile_size_int;
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const int grid_rows = tilemap->size.y / tile_size_int;
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// 计算实体碰撞盒在瓦片地图局部坐标系中的位置
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const ge_vector2i_t local_entity_pos = GE_VEC2I_SUB(
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entity_collision->position,
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tilemap->position
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);
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// 计算实体边界（使用闭区间）
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const int entity_left = local_entity_pos.x;
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const int entity_top = local_entity_pos.y;
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const int entity_right = entity_left + entity_collision->size.x - 1; // 闭区间右边界
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const int entity_bottom = entity_top + entity_collision->size.y - 1; // 闭区间下边界
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// 计算覆盖的瓦片范围
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const int start_tile_x = GE_MAX(0, entity_left / tile_size_int);
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const int start_tile_y = GE_MAX(0, entity_top / tile_size_int);
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const int end_tile_x = GE_MIN(grid_cols - 1, entity_right / tile_size_int);
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const int end_tile_y = GE_MIN(grid_rows - 1, entity_bottom / tile_size_int);
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// 遍历实体覆盖的瓦片区域
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for (int y = start_tile_y; y <= end_tile_y; y++) {
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for (int x = start_tile_x; x <= end_tile_x; x++) {
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// 计算当前瓦片的边界（开区间）
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const int tile_left = x * tile_size_int;
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const int tile_top = y * tile_size_int;
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const int tile_right = tile_left + tile_size_int; // 开区间右边界
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const int tile_bottom = tile_top + tile_size_int; // 开区间下边界
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// 检查实体是否实际接触到瓦片内部
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const int overlap_x = entity_left < tile_right && entity_right > tile_left;
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const int overlap_y = entity_top < tile_bottom && entity_bottom > tile_top;
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if (overlap_x && overlap_y && tilemap->layers[y * grid_cols + x] != 0) {
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return 1; // 检测到碰撞
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}
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}
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}
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return 0; // 无碰撞
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}
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