我怎样才能在openGL ES 2.0中使用popmatrix

Question

我知道openGL ES 1.0可以popmatrix，并推送矩阵。但在ES 2.0中，我不知道该怎么做。当我trans或rotate我的对象时，它也会影响其他对象。我想解决这个问题，谢谢：）

这是我的示例代码：

        //lego
        Matrix.translateM(modelViewMatrix, 0, step_w, step_h, 0);
        Matrix.setRotateM(rotationMatrix, 0, angle, 0.0f, 0.0f, 1.0f);
        Matrix.multiplyMM(modelViewMatrix, 0, modelViewMatrix, 0, rotationMatrix, 0);
        Matrix.setRotateM(rotationMatrix, 0, 90.0f, 1.0f, 0.0f, 0.0f);
        Matrix.multiplyMM(modelViewMatrix, 0, modelViewMatrix, 0, rotationMatrix, 0);
        Matrix.multiplyMM(modelViewProjectionScaled, 0, projectionMatrix, 0, modelViewMatrix, 0);
        GLES20.glVertexAttribPointer(vertexHandle, 3, GLES20.GL_FLOAT, false, 0, (FloatBuffer) verticeBuffers.get(0));
        GLES20.glVertexAttribPointer(textureCoordHandle, 2, GLES20.GL_FLOAT, false, 0, (FloatBuffer) textureBuffers.get(0));
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, thisTexture.mTextureID[0]);
        GLES20.glUniformMatrix4fv(mvpMatrixHandle, 1, false, modelViewProjectionScaled, 0);
        GLES20.glUniform1i(texSampler2DHandle, 0);
        GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, mObj.getNumObjectVertex(0));


        //tomato
        Matrix.translateM(modelViewMatrix, 0, -30, -30, 0);
        Matrix.setRotateM(rotationMatrix, 0, 90, 0.0f, 0.0f, 1.0f);
        Matrix.multiplyMM(modelViewMatrix, 0, modelViewMatrix, 0, rotationMatrix, 0);
        Matrix.setRotateM(rotationMatrix, 0, 90.0f, 1.0f, 0.0f, 0.0f);
        Matrix.multiplyMM(modelViewMatrix, 0, modelViewMatrix, 0, rotationMatrix, 0);
        Matrix.multiplyMM(modelViewProjectionScaled, 0, projectionMatrix, 0, modelViewMatrix, 0);
        GLES20.glVertexAttribPointer(vertexHandle, 3, GLES20.GL_FLOAT,
                false, 0, (FloatBuffer) verticeBuffers_to.get(0));
        GLES20.glVertexAttribPointer(textureCoordHandle, 2, GLES20.GL_FLOAT,
                false, 0, (FloatBuffer) textureBuffers_to.get(0));
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, toTexture.mTextureID[0]);
        GLES20.glUniformMatrix4fv(mvpMatrixHandle, 1, false, modelViewProjectionScaled, 0);
        GLES20.glUniform1i(texSampler2DHandle, 0);
        GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, mObj_to.getNumObjectVertex(0));

如果我试图改变乐高，番茄也会移动。