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148 lines
4.2 KiB
Markdown
148 lines
4.2 KiB
Markdown
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---
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category: tool
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tool: raylib
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lang: zh-cn
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filename: learnraylib-cn.c
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contributors:
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- ["Nikolas Wipper", "https://notnik.cc"]
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translators:
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- ["lzw-723", "https://github.com/lzw-723"]
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---
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**raylib** 是一个跨平台、易用的图形库,围绕OpenGL 1.1、2.1、3.3和OpenGL ES 2.0构建。
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虽然它是用C语言编写的,却有超过50种不同语言的绑定。本教程将使用C语言。
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更确切地说,是C99。
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```c
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#include <raylib.h>
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int main(void)
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{
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const int screenWidth = 800;
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const int screenHeight = 450;
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// 在初始化raylib之前,可以设置标志位
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SetConfigFlags(FLAG_MSAA_4X_HINT | FLAG_VSYNC_HINT);
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// raylib并不要求我们存储任何实例结构
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// 目前raylib一次只能处理一个窗口
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InitWindow(screenWidth, screenHeight, "MyWindow");
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// 设置我们的游戏以每秒60帧的速度运行
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SetTargetFPS(60);
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// 设置一个关闭窗口的键。
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//可以是0,表示没有键
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SetExitKey(KEY_DELETE);
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// raylib定义了两种类型的相机。Camera3D和Camera2D
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// Camera是Camera3D的一个类型化定义
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Camera camera = {
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.position = {0.0f, 0.0f, 0.0f},
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.target = {0.0f, 0.0f, 1.0f},
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.up = {0.0f, 1.0f, 0.0f},
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.fovy = 70.0f,
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.type = CAMERA_PERSPECTIVE
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};
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// raylib支持加载各种不同的文件格式的模型、动画、图像和声音。
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Model myModel = LoadModel("my_model.obj");
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Font someFont = LoadFont("some_font.ttf");
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// 创建一个100x100的渲染纹理
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RenderTexture renderTexture = LoadRenderTexture(100, 100);
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// WindowShouldClose方法检查用户是否正在关闭窗口。
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// 可能用的是快捷方式、窗口控制或之前设置的关闭窗口键
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while (!WindowShouldClose())
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{
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// BeginDrawing方法要在任何绘图操作之前被调用。
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BeginDrawing();
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{
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// 为背景设定某种颜色
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ClearBackground(BLACK);
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if (IsKeyDown(KEY_SPACE))
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DrawCircle(400, 400, 30, GREEN);
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// 简单地绘制文本
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DrawText("Congrats! You created your first window!",
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190, // x
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200, // y
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20, // 字体大小
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LIGHTGRAY
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);
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// 大多数函数都有几个版本
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// 通常后缀为Ex, Pro, V
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// 或者是Rec、Wires(仅适用于3D)、Lines(仅适用于2D)。
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DrawTextEx(someFont,
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"Text in another font",
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(Vector2) {10, 10},
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20, // 字体大小
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2, // 间距
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LIGHTGRAY);
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// 绘制3D时需要,有2D的等价方法
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BeginMode3D(camera);
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{
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DrawCube((Vector3) {0.0f, 0.0f, 3.0f},
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1.0f, 1.0f, 1.0f, RED);
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// 绘图时的白色色调将保持原来的颜色
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DrawModel(myModel, (Vector3) {0.0f, 0.0f, 3.0f},
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1.0f, // 缩放
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WHITE);
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}
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// 结束3D模式,这样就可以再次普通绘图
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EndMode3D();
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// 开始在渲染纹理上绘图
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BeginTextureMode(renderTexture);
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{
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// 它的行为与刚才调用的`BeginDrawing()`方法相同
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ClearBackground(RAYWHITE);
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BeginMode3D(camera);
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{
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DrawGrid(10, // Slices
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1.0f // 间距
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);
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}
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EndMode3D();
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}
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EndTextureMode();
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// 渲染有Texture2D字段的纹理
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DrawTexture(renderTexture.texture, 40, 378, BLUE);
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}
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EndDrawing();
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}
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// 卸载已载入的对象
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UnloadFont(someFont);
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UnloadModel(myModel);
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// 关闭窗口和OpenGL上下文
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CloseWindow();
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return 0;
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}
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```
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## 延伸阅读
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raylib有一些[不错的例子](https://www.raylib.com/examples.html)
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如果你不喜欢C语言你也可以看看[raylib的其他语言绑定](https://github.com/raysan5/raylib/blob/master/BINDINGS.md)
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