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public void initFramebuffers() {
        // Thickness buffer
        glBindFramebuffer(GL_FRAMEBUFFER, thicknessShader.fbo);
        thicknessShader.initTexture(width, height, GL_RGBA, GL_RGBA32F);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, thicknessShader.tex, 0);
}

public void initTexture(int width, int height, int format, int internalFormat) {
                tex = glGenTextures();
                glBindTexture(GL_TEXTURE_2D, tex);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
                glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, GL_FLOAT, (ByteBuffer)null);
}

//--------------------Particle Thickness-----------------------
{
        glUseProgram(thicknessShader.program);
        glBindFramebuffer(GL_FRAMEBUFFER, thicknessShader.fbo);

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        thicknessShader.particleThicknessVAO(points);

        RenderUtility.setMatrix(thicknessShader, mView, "mView");
        RenderUtility.setMatrix(thicknessShader, projection, "projection");
        RenderUtility.setVector2(thicknessShader, screenSize, "screenSize");

        glEnable(GL_BLEND);
        glBlendFunc(GL_ONE, GL_ONE);
        glBlendEquation(GL_FUNC_ADD);
        glDisable(GL_DEPTH_TEST);

        glBindVertexArray(thicknessShader.vao);

        glDrawArrays(GL_POINTS, 0, points.size());

        glDisable(GL_BLEND);
}