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shaders/texture_loading/glsl/bg.frag

@@ -1,11 +1,17 @@
 #version 450
 
-layout(binding = 0) uniform sampler2D backgroundTexture; // Binding 0
+// 输入变量（与顶点着色器输出对应）
+layout(location = 0) in vec2 inPosition;
 
-layout(location = 0) in vec2 inUV;
+// 输出颜色
 layout(location = 0) out vec4 outColor;
 
 void main() {
-    //outColor = texture(backgroundTexture, inUV);
-    outColor = vec4(1.0, 0.0, 0.0, 1.0); // 输出红色
+    // 示例：基于位置生成颜色
+    outColor = vec4(
+        (inPosition.x + 1.0) * 0.5,  // 将X从[-1,1]映射到[0,1]
+        (inPosition.y + 1.0) * 0.5,  // 将Y从[-1,1]映射到[0,1]
+        0,                         // 蓝色分量固定
+        1.0                          // Alpha固定
+    );
 }