Question

我正在尝试使用Qt3D库将.obj文件加载到Qt中。到目前为止，我的代码主要是从以下一个示例中复制而来：

import random
print("You are in a dark room in a mysterious castle.")
print("In front of you are four doors. You must choose one.")
playerChoice = input("Choose 1, 2, 3, or 4...")
if playerChoice == "1":
        print("You found a room full of tresure. YOU'RE RICH!!!")
        print("GAME OVER, YOU WIN!")
elif playerChoice == "2":
        print("The door opens and an angry ogre hits you with his club.")
        print("GAME OVER, YOU DIED!")
elif playerChoice == "3":
        print("You encounter a sleeping dragon.")
        print("You can do either:")
        print("1) Try to steal some of the dragon's gold")
        print("2) Sneak around the dragon to the exit")
        dragonChoice = input("type 1 or 2...")
        if dragonChoice == "1":
            print("The dragon wakes up and eats you. You are delicious.")
            print("GAME OVER, YOU WERE EATEN ALIVE.")
        elif dragonChoice == "2":
            print("You sneak around the dragon and escape the castle, blinking in the sunshine.")
            print("GAME OVER, YOU ESCAPED THE CASTLE.")
        else:
            print("Sorry, you didn't enter 1 or 2.")

elif    playerChoice == "4":
            print("You enter a room with a sphinx.")
            print("It asks you to guess what number it is thinking of, betwwen 1 to 10.")
            number = int(input("What number do you choose?"))    
            if number == random.randint (1, 10):
                print("The sphinx hisses in dissapointment. You guessed correctly.")
                print("It must let you go free.")
                print("GAME OVER, YOU WIN.")             
            else:
                 print("The sphinx tells you that your guess is incorrect.")
                 print("You are now it's prisoner forever.")
                 print("GAME OVER, YOU LOSE.")        
else:
     print("sorry, you didn't enter 1, 2, 3, or 4...")
     print("YOU TURN BACK AND LEAVE (YOU COWARD)")

到目前为止，应用程序可以渲染对象并显示它。但是，我必须将.obj文件附加到qrc文件，以便它能够找到并呈现它。当我尝试使用来自任何目录的绝对路径设置Qt3DCore::QEntity *createScene() { // Root entity Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity; // Material Qt3DRender::QMaterial *material = new Qt3DExtras::QPhongMaterial(rootEntity); // Chest Entity Qt3DCore::QEntity *chestEntity = new Qt3DCore::QEntity(rootEntity); Qt3DRender::QMesh *chestMesh = new Qt3DRender::QMesh(rootEntity); chestMesh->setSource(QUrl("qrc:/PT18E.obj")); chestEntity->addComponent(chestMesh); chestEntity->addComponent(material); return rootEntity; } int main(int argc, char* argv[]) { QGuiApplication app(argc, argv); Qt3DExtras::Qt3DWindow view; Qt3DCore::QEntity *scene = createScene(); // Camera Qt3DRender::QCamera *camera = view.camera(); camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f); camera->setPosition(QVector3D(0, 0, 1)); camera->setViewCenter(QVector3D(0, 0, 0)); // For camera controls Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController(scene); camController->setLinearSpeed( 10.0f ); camController->setLookSpeed( 180.0f ); camController->setCamera(camera); view.setRootEntity(scene); view.show(); return app.exec(); }的源时，例如，

chestMesh

它不起作用。什么都没有呈现，我在控制台中看到错误

chestMesh->setSource(QURL(C:/Users/username/Documents/Qt/simple-cpp/PT18E.obj))

我尝试将完全相同的路径添加到QFSFileEngine::open: No file name specified对象，然后使用QFile函数查看路径是否正确，确定路径是否正确。但由于某种原因，网格不能使用不在qrc文件中的源。

如何在Qt中从文件系统加载和渲染任何.obj文件（无需将其放入qrc中）？

Answer 1

为了编写指向文件的正确url，我们可以尝试静态调用QUrl::fromLocalFile。或者给出以上代码：

chestMesh->setSource(QUrl::fromLocalFile(winPath2ObjFile));

如何从Qt 5.9中的任何目录渲染.obj文件

1 个答案: