片元着色器:

#version 330 core

out vec4 color;
//全局
uniform vec4 vertexColor;
void main()
{

	color=vertexColor;
}

*.cpp:

//使用着色器程序
		glUseProgram(shaderProgram);
		//获取程序运行的时间
		GLfloat timeValue = glfwGetTime();
		//防止变负数
		GLfloat greenValue = (sin(timeValue)/2)+0.5;
		GLint vertexColorLocation = glGetUniformLocation(shaderProgram, "vertexColor");
		glUniform4f(vertexColorLocation, 0.0f, greenValue, 0.0f, 1.0f);