opengl 旋转方向

    // render boxes
    for (unsigned int i = 0; i < 5; i++)
    {
        // calculate the model matrix for each object and pass it to shader before drawing
        glm::mat4 model = glm::mat4(1.0f); // make sure to initialize matrix to identity matrix first
        model = glm::translate(model, cubePositions[i]);
        float angle = 20.0f * i;
        //model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
        model = glm::rotate(model, glm::radians(angle), glm::vec3(0.0f, 0.f, 1.f));
        glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));

        glDrawArrays(GL_TRIANGLES, 0, 36);
    }
一， X轴旋转 glm::vec3(1.0f, 0.f, 0.f));

二， Y轴旋转 glm::vec3(0.0f, 1.f, 0.f));

三， Z轴旋转 glm::vec3(0.0f, 0.f, 1.f));

OpenGL  旋转是顺时针的。