c++ - 警告 : Variable cannot be bound (it either doesn't exist or has been optimized away)

Question

我正在尝试传递一个变量 timeVar(一个最初设置为 0.0 的 float )，它在我的 display() 方法中用以下行进行更改

timeVar = time(0);

到我的片段着色器。然后我这样做

safe_glUniform1f(h_uTime, timeVar); 

像这样把它传递给我的着色器程序

h_uTime = safe_glGetAttribLocation(h_program, "uTime");

但是我一直收到这个错误。请帮忙!

WARN: uTime cannot be bound (it either doesn't exist or has been optimized 
away). safe_glAttrib calls will silently ignore it.

Answer 1

因为 uTime 是统一的而不是属性，使用 glGetAttribLocation 总是会导致错误。必须改用 glGetUniformLocation。