why object draw as 180 degree rotate?

Dear all, I tried to draw two different opengles square object binding with two image(texture) on two marker. I able to do that. but the problem is two square binding with image drawn as 180 rotate wise. I already use same coding in other openGLES application and it draws two object(square) properly. But here in Qcar, it draw 180 rotate. This is my coding to : static const float vertices[] = { -50.0f,-20.0f, 0.0f, //Vertex 0 50.0f, -20.0f, 0.0f, //v50 50.0f, 20.0f, 0.0f, //v2 -50.0f, 20.0f, 0.0f //v3 }; /** The initial texture coordinates (u, v) */ static const float texture[] = { //Mapping coordinates for the vertices 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f }; /** The initial indices definition */ static const GLubyte indices[] = {0,1,2,3}; if (!strcmp(trackable->getName(), "stones")) { textureIndex = 0; thisVertices = vertices; thisTexCoords = texture; //thisNormals = teapotNormals; thisIndices = indices; } .................. const Texture* const thisTexture = textures[textureIndex]; glEnableVertexAttribArray(vertexHandle); glEnableVertexAttribArray(textureCoordHandle); QCAR::Matrix44F modelViewProjection; SampleUtils::translatePoseMatrix(0.0f, 0.0f, kObjectScale, &modelViewMatrix.data[0]); SampleUtils::scalePoseMatrix(kObjectScale, kObjectScale, kObjectScale, &modelViewMatrix.data[0]); SampleUtils::multiplyMatrix(&projectionMatrix.data[0], &modelViewMatrix.data[0] , &modelViewProjection.data[0]); glUseProgram(shaderProgramID); glBindTexture(GL_TEXTURE_2D, thisTexture->mTextureID); glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); glVertexAttribPointer(vertexHandle, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &thisVertices[0]); glVertexAttribPointer(textureCoordHandle, 2, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &thisTexCoords[0]); glUniformMatrix4fv(mvpMatrixHandle, 1, GL_FALSE, (GLfloat*)&modelViewProjection.data[0] ); glDrawElements(GL_TRIANGLE_FAN, 4, GL_UNSIGNED_BYTE, (const GLvoid*) &thisIndices[0]); Can anyone help to find the problem here. why the square(bind with texture image) drawn 180 rotate.... Regards Rassall