我正在尝试在 qt 5.1.1 中编写一个使用着色器使用 opengl 渲染的地图应用程序。我能够使用 Glew 显示顶点。但我想使用 qopenglfunctions.h 中提供的函数,奇怪的是,即使我包含这个文件,我得到 glGenBuffers 没有在这个范围内声明。当我打开 qopenglfunctions.h 时,它就在那个文件中!有人遇到过这个奇怪的问题吗?代码有点长。但是我添加了一些会引发链接器错误的内容。
initializeGLFunctions();
this->program=program;
glGenVertexArrays(1,&mapVAO); //This is where the linker throws an error
glBindVertexArray(mapVAO);
// Generate 2 VBOs
glGenBuffers(2, mapBuffer);
initMapBoundary();
void GeometryEngine::initMapBoundary()
{
GLfloat mapSize=5.0f;
VertexData boundary[] = {
// Vertex data for face 0
{QVector3D(-mapSize, -mapSize, 1.0), QVector2D(0, 0)}, // v0
{QVector3D( mapSize, -mapSize, 1.0), QVector2D(20.0,0/*0.33, 0.0*/)}, // v1
{QVector3D(-mapSize, mapSize, 1.0), QVector2D(0,20/*0.0, 0.5*/)}, // v2
{QVector3D( mapSize, mapSize, 1.0), QVector2D(20.0,20.0/*0.33, 0.5*/)}, // v3
};
GLushort indices[] = {
0, 1, 2, 3,
};
// Transfer vertex data to VBO 0
glBindBuffer(GL_ARRAY_BUFFER, mapBuffer[0]);
glBufferData(GL_ARRAY_BUFFER, 4 * sizeof(VertexData), boundary, GL_STATIC_DRAW);
// Transfer index data to VBO 1
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mapBuffer[1]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, 4 * sizeof(GLushort), indices, GL_STATIC_DRAW);
// Offset for position
quintptr offset = 0;
// Tell OpenGL programmable pipeline how to locate vertex position data
int vertexLocation = program->attributeLocation("a_position");
program->enableAttributeArray(vertexLocation);
// program->setAttributeBuffer(vertexLocation,GL_FLOAT,offset,3);
glVertexAttribPointer(vertexLocation, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData), (const void *)offset);
// Offset for texture coordinate
offset += sizeof(QVector3D);
// Tell OpenGL programmable pipeline how to locate vertex texture coordinate data
int texcoordLocation = program->attributeLocation("a_texcoord");
program->enableAttributeArray(texcoordLocation);
glVertexAttribPointer(texcoordLocation, 2, GL_FLOAT, GL_FALSE, sizeof(VertexData), (const void *)offset);
//program->setAttributeBuffer(texcoordLocation,GL_FLOAT,offset,2);
}
就像我说的,这一切在我的 linux 机器上运行良好,所以我确信代码没有什么问题。我只需要知道如何告诉 qt 构建系统在 windows (7) 机器上选择正确的 opengl 驱动程序。显卡 Nvidia GT325m