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当添加一个浮动属性来我的OpenGL的片段(我想找到它后),当我编译,我得到:的OpenGL ES - 在全球范围内的误差无效预选赛
ERROR: 0:1: Invalid qualifiers 'attribute' in global variable context
这里是我的代码:
const char * sChromaKeyFragment = _STRINGIFY(
attribute float threshold;
varying highp vec2 coordinate;
precision mediump float;
uniform sampler2D videoframe;
uniform sampler2D videosprite;
uniform vec4 mask;
vec3 normalize(vec3 color, float meanr)
{
return color*vec3(0.75 + meanr, 1., 1. - meanr);
}
void main()
{
}
OpenGL的新手。任何帮助都会很棒。谢谢!