写操作的SSBO同步

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//Create one Shader Storage Buffer Object for vertices of detected points
            GLuint Detected_Vertices_SSBO;
            glGenBuffers(1,&Detected_Vertices_SSBO);
            glBindBuffer(GL_SHADER_STORAGE_BUFFER,Detected_Vertices_SSBO);
            glBufferData(GL_SHADER_STORAGE_BUFFER,(sizeN-NbTotalreflectionPoints.at(i))*sizeof(glm::vec4),NULL,GL_DYNAMIC_DRAW);
            sprintf(OpenGLErrorMessage,"%s\n","Error on Vertices SSBO at creation time.");
            QueryForOpenGLErrors(OpenGLErrorMessage);
            glBindBufferBase(GL_SHADER_STORAGE_BUFFER,0,Detected_Vertices_SSBO);
            sprintf(OpenGLErrorMessage,"%s\n","Error on Vertices SSBO at binding time.");
            QueryForOpenGLErrors(OpenGLErrorMessage);
            //Create one Shader Storage Buffer Object for colors of detected points
            GLuint Detected_Vertices_Colors_SSBO;
            glGenBuffers(1,&Detected_Vertices_Colors_SSBO);
            glBindBuffer(GL_SHADER_STORAGE_BUFFER,Detected_Vertices_Colors_SSBO);
            glBufferData(GL_SHADER_STORAGE_BUFFER,(sizeN-NbTotalreflectionPoints.at(i))*sizeof(glm::vec4),NULL,GL_DYNAMIC_DRAW);
            sprintf(OpenGLErrorMessage,"%s\n","Error on Colors of Vertices SSBO at creation time.");
            QueryForOpenGLErrors(OpenGLErrorMessage);
            glBindBufferBase(GL_SHADER_STORAGE_BUFFER,1,Detected_Vertices_Colors_SSBO);
            sprintf(OpenGLErrorMessage,"%s\n","Error on Vertices Colors SSBO at binding time.");
            QueryForOpenGLErrors(OpenGLErrorMessage);
glDrawArrays(GL_POINTS, 2*3+NbTargets1*12*3, NbPoints); //
                glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
                glFinish();
glBindBuffer(GL_SHADER_STORAGE_BUFFER, Detected_Vertices_SSBO);
                glm::vec4 * SSBO_Position_ptr = (glm::vec4*)glMapBuffer(GL_SHADER_STORAGE_BUFFER,GL_READ_ONLY);
                sprintf(OpenGLErrorMessage,"%s\n","Error on Vertices SSBO at mapping time.");
                QueryForOpenGLErrors(OpenGLErrorMessage);
                glFinish();
                glBindBuffer(GL_SHADER_STORAGE_BUFFER, Detected_Vertices_Colors_SSBO);
                glm::vec4 * SSBO_Color_ptr = (glm::vec4*)glMapBuffer(GL_SHADER_STORAGE_BUFFER,GL_READ_ONLY);
                sprintf(OpenGLErrorMessage,"%s\n","Error on Vertices Colors SSBO at mapping time.");
                QueryForOpenGLErrors(OpenGLErrorMessage);
                glFinish();

#version 430 core

// Interpolated values from the vertex shaders
in vec4 fragmentColor;
in vec4 worldspace;
//SSBO's for detected points and their colors
layout (binding=0, std430) coherent buffer detected_vertices_storage 
vec4 detected_vertices[];
}Positions;
layout (binding=1, std430) coherent buffer detected_vertices_colors_storage 
vec4 detected_vertices_colors[];
}Colors;

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