实线画出来了。

shaders/texture_loading/glsl/point_line.frag

@@ -3,7 +3,7 @@
 layout(location = 0) in vec3 fragColor;
 layout(location = 1) in vec3 fragSegmentStart;
 layout(location = 2) in vec3 fragSegmentEnd;
-layout(location = 3) in vec3 fragWorldPos;
+//layout(location = 3) in vec3 fragWorldPos;
 
 layout(location = 0) out vec4 outColor;
 
@@ -56,9 +56,12 @@ void main() {
                              currentPos);
     
     // 如果alpha接近0，直接丢弃片元
-    if (alpha < 0.01) {
-        discard;
-    }
     
-    outColor = vec4(fragColor, alpha);
+    // if (alpha < 0.01) {
+    //     discard;
+    // }
+    
+    // outColor = vec4(fragColor, alpha);
+
+    outColor = vec4(1, 0, 0, 1.0);
 }