所以我试着在我的物品上贴上标签。我尝试了一个测试示例,只在其中放置一个简单的标签。然而,当我运行程序时,所有对象都有些透明。
油漆GL:
void mainWidget::paintGL(){
QPainter painter(this);
painter.beginNativePainting();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glViewport(0, 0, width(), height());
projection = camera->getProjectionMatrix(60.0f, width(), height(), 0.1f, 100.0f);
vec3 cameraPos(camera->getPosition());
view = camera->getViewMatrix();
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
if (isLine)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
shaderProgram->bind();
shaderProgram->setUniformValue("Light.ambient", 0.1f);
shaderProgram->setUniformValue("Light.position", QVector3D(ld[0], ld[1], ld[2]));
model = mat4(1.0f);
model = glm::translate(model, modelOrigin + cubePosModel);
setRotModel(cubeRotModel);
setMatrices(shaderProgram, true);
shaderProgram->setUniformValue("viewPosition", QVector3D(cameraPos[0], cameraPos[1], cameraPos[2]));
if (showCube)
cubeMesh->render(shaderProgram);
shaderProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if (isLine)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
view = camera->getViewMatrix();
model = mat4(1.0f);
model = glm::translate(model, modelOrigin + planePosModel);
setRotModel(planeRotModel);
shaderProgram->bind();
setMatrices(shaderProgram, true);
shaderProgram->setUniformValue("viewPosition", QVector3D(cameraPos[0], cameraPos[1], cameraPos[2]));
if (showPlane)
planeMesh->render(shaderProgram);
shaderProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if (isLine)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
model = glm::mat4(1.0f);
model = glm::translate(model, modelOrigin + teapotPosModel);
setRotModel(teapotRotModel);
shaderProgram->bind();
setMatrices(shaderProgram, true);
if (showTeapot)
teapotMesh->render(shaderProgram);
shaderProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
model = glm::mat4(1.0f);
model = glm::translate(model, modelOrigin + cubeLightPosModel);
model = glm::scale(model, glm::vec3(0.3f));
setRotModel(cubeLightRotModel);
lightCubeProgram->bind();
setMatrices(lightCubeProgram, false);
if (showCubeLight)
cubeMesh->render(lightCubeProgram);
lightCubeProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
axis_vao->bind();
model = mat4(1.0f);
model = glm::translate(model, modelOrigin);
model = glm::scale(model, vec3(5.0f));
model = glm::rotate(model, glm::radians(2.0f), vec3(1, 1, 0));
drawAxisProgram->bind();
glm::mat4 pvm = projection * view * model;
drawAxisProgram->setUniformValue("mvpMatrix", QMatrix4x4(glm::value_ptr(pvm)).transposed());
if (showGrid)
glDrawArrays(GL_LINES, 0, axisSize);
axis_vao->release();
drawAxisProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
if (isLine)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
model = mat4(1.0f);
model = glm::translate(model, modelOrigin + vec3(0, 2, -1));
shaderProgram->bind();
setMatrices(shaderProgram, true);
if (showSphere)
sphereMesh->render(shaderProgram);
shaderProgram->release();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
painter.endNativePainting();
painter.setPen(Qt::yellow);
painter.setFont(QFont("Helvetica", 8));
painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
painter.drawText(200, 400, "Scene Maker"); // z = pointT4.z + distOverOp / 4
painter.end();
}
我不知道为什么,但它是唯一透明的物体。此外,QPainter 的添加也弄乱了茶壶的盖子。也许它与正在发生的 glPolygonMode 混乱的事情有关?
万一是 QPainter 偷偷地禁用GL_DEPTH_TEST
了,这似乎是这种情况,我后来重新启用了它,但它仍然没有工作。
mainWidget
是一个QOpenGLWidget
。
那么,问题是什么?图片:
(如您所见,网格线通过茶壶显示,但立方体没有,使其不完全透明。)
编辑:我发现所有其他对象也是透明的。