style: 调整main.cpp的代码格式和include顺序

- 统一缩进为2个空格
- 调整头文件include顺序
- 移除多余的注释分隔线

examples/scene_graph_demo/main.cpp

@@ -12,9 +12,9 @@
  * - SpriteRenderer 精灵渲染
  */
 
-#include <extra2d.h>
 #include "game_scene.h"
 #include <cstdio>
+#include <extra2d.h>
 
 using namespace extra2d;
 
@@ -22,58 +22,54 @@ using namespace extra2d;
  * @brief 程序入口
  */
 int main(int argc, char **argv) {
-    // ========================================
-    // 1. 创建应用
-    // ========================================
-    auto app = Application::create();
+  // ========================================
+  // 1. 创建应用
+  // ========================================
+  auto app = Application::create();
 
-    AppConfig config;
-    config.title = "Scene Graph Demo - Extra2D";
-    config.width = 1280;
-    config.height = 720;
+  AppConfig config;
+  config.title = "Scene Graph Demo - Extra2D";
+  config.width = 1280;
+  config.height = 720;
 
-    if (!app->init(config)) {
-        printf("Failed to initialize application!\n");
-        return -1;
-    }
+  if (!app->init(config)) {
+    printf("Failed to initialize application!\n");
+    return -1;
+  }
+  // ========================================
+  // 2. 获取场景模块和导演
+  // ========================================
+  SceneModule *sceneModule = app->getModule<SceneModule>();
+  if (!sceneModule) {
+    printf("Failed to get SceneModule!\n");
+    return -1;
+  }
 
-    printf("Application initialized successfully\n");
-    printf("Window size: %dx%d\n", app->getWindowWidth(), app->getWindowHeight());
+  Director *director = sceneModule->getDirector();
+  if (!director) {
+    printf("Failed to get Director!\n");
+    return -1;
+  }
 
-    // ========================================
-    // 2. 获取场景模块和导演
-    // ========================================
-    SceneModule *sceneModule = app->getModule<SceneModule>();
-    if (!sceneModule) {
-        printf("Failed to get SceneModule!\n");
-        return -1;
-    }
+  printf("Scene module and director ready\n");
 
-    Director *director = sceneModule->getDirector();
-    if (!director) {
-        printf("Failed to get Director!\n");
-        return -1;
-    }
+  // ========================================
+  // 3. 创建并运行游戏场景
+  // ========================================
+  auto gameScene = makePtr<GameScene>();
+  director->runScene(gameScene);
 
-    printf("Scene module and director ready\n");
+  printf("Game scene started\n");
 
-    // ========================================
-    // 3. 创建并运行游戏场景
-    // ========================================
-    auto gameScene = makePtr<GameScene>();
-    director->runScene(gameScene);
+  // ========================================
+  // 4. 运行应用主循环
+  // ========================================
+  app->run();
 
-    printf("Game scene started\n");
+  // ========================================
+  // 5. 清理（自动进行）
+  // ========================================
+  printf("Application shutting down...\n");
 
-    // ========================================
-    // 4. 运行应用主循环
-    // ========================================
-    app->run();
-
-    // ========================================
-    // 5. 清理（自动进行）
-    // ========================================
-    printf("Application shutting down...\n");
-
-    return 0;
+  return 0;
 }

shader/instanced.vert

@@ -1,73 +0,0 @@
-#version 320 es
-precision highp float;
-
-// 全局 UBO (binding = 0) - 每帧更新一次
-layout(std140, binding = 0) uniform GlobalUBO {
-    mat4 uViewProjection;
-    vec4 uCameraPosition;
-    float uTime;
-    float uDeltaTime;
-    vec2 uScreenSize;
-};
-
-// 材质 UBO (binding = 1) - 每批次更新
-layout(std140, binding = 1) uniform MaterialUBO {
-    vec4 uColor;
-    vec4 uTintColor;
-    float uOpacity;
-    float uPadding[3];  // std140 对齐填充
-};
-
-// 顶点属性 (每个顶点)
-layout(location = 0) in vec2 aPosition;
-layout(location = 1) in vec2 aTexCoord;
-layout(location = 2) in vec4 aColor;
-
-// 实例属性 (每个实例) - 使用 location 3-6
-layout(location = 3) in vec2 iPosition;   // 实例位置
-layout(location = 4) in float iRotation;  // 实例旋转
-layout(location = 5) in vec2 iScale;      // 实例缩放
-layout(location = 6) in vec4 iColor;      // 实例颜色
-
-// 输出到片段着色器
-out vec2 vTexCoord;
-out vec4 vColor;
-out vec4 vTintColor;
-out float vOpacity;
-
-/**
- * @brief 从旋转角度构建2D变换矩阵
- * @param angle 旋转角度（弧度）
- * @return 2x2旋转矩阵
- */
-mat2 rotate2D(float angle) {
-    float c = cos(angle);
-    float s = sin(angle);
-    return mat2(c, -s, s, c);
-}
-
-/**
- * @brief 顶点着色器入口
- *
- * 计算顶点在裁剪空间中的位置，
- * 应用实例的变换（位置、旋转、缩放），
- * 并传递纹理坐标和颜色到片段着色器
- */
-void main() {
-    // 应用实例缩放和旋转
-    vec2 localPos = rotate2D(iRotation) * (aPosition * iScale);
-
-    // 应用实例位置偏移
-    vec2 worldPos = localPos + iPosition;
-
-    // 变换到裁剪空间
-    gl_Position = uViewProjection * vec4(worldPos, 0.0, 1.0);
-
-    vTexCoord = aTexCoord;
-
-    // 混合顶点颜色、实例颜色和材质颜色
-    vColor = aColor * iColor * uColor;
-
-    vTintColor = uTintColor;
-    vOpacity = uOpacity;
-}

shader/sprite_instanced.frag

@@ -1,35 +0,0 @@
-#version 320 es
-precision highp float;
-
-// 从顶点着色器输入
-in vec2 vTexCoord;
-in vec4 vColor;
-
-// 纹理采样器
-uniform sampler2D uTexture;
-
-// 输出颜色
-out vec4 fragColor;
-
-/**
- * @brief 片段着色器入口（实例化版本）
- *
- * 采样纹理并与顶点颜色混合
- */
-void main() {
-    // 采样纹理
-    vec4 texColor = texture(uTexture, vTexCoord);
-    
-    // 如果纹理采样结果是黑色或透明，使用白色作为默认值
-    if (texColor.rgb == vec3(0.0) || texColor.a < 0.01) {
-        texColor = vec4(1.0, 1.0, 1.0, 1.0);
-    }
-    
-    // 混合：纹理 * 顶点颜色
-    fragColor = texColor * vColor;
-    
-    // Alpha 测试：丢弃几乎透明的像素
-    if (fragColor.a < 0.01) {
-        discard;
-    }
-}