# Copyright (C) 2021 Riverbank Computing Limited
# Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
#
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import sys

from PyQt6.QtCore import pyqtSlot, QObject, QSize, Qt
from PyQt6.QtGui import QColor, QQuaternion, QVector3D
from PyQt6.QtWidgets import (QApplication, QCheckBox, QCommandLinkButton,
        QHBoxLayout, QVBoxLayout, QWidget)
from PyQt6.Qt3DCore import QEntity, QTransform
from PyQt6.Qt3DExtras import (Qt3DWindow, QConeMesh, QCuboidMesh,
        QCylinderMesh, QFirstPersonCameraController, QPhongMaterial,
        QPlaneMesh, QSphereMesh, QTorusMesh)
from PyQt6.Qt3DInput import QInputAspect
from PyQt6.Qt3DRender import QCamera


class SceneModifier(QObject):

    def __init__(self, rootEntity):
        super().__init__()

        self.m_rootEntity = rootEntity

        # Torus shape data.
        self.m_torus = QTorusMesh()
        self.m_torus.setRadius(1.0)
        self.m_torus.setMinorRadius(0.4)
        self.m_torus.setRings(100)
        self.m_torus.setSlices(20)

        # TorusMesh transform.
        torusTransform = QTransform()
        torusTransform.setScale(2.0)
        torusTransform.setRotation(
                QQuaternion.fromAxisAndAngle(QVector3D(0.0, 1.0, 0.0), 25.0))
        torusTransform.setTranslation(QVector3D(5.0, 4.0, 0.0))

        torusMaterial = QPhongMaterial()
        torusMaterial.setDiffuse(QColor(0xbeb32b))

        # Torus.
        self.m_torusEntity = QEntity(self.m_rootEntity)
        self.m_torusEntity.addComponent(self.m_torus)
        self.m_torusEntity.addComponent(torusMaterial)
        self.m_torusEntity.addComponent(torusTransform)

        # Cone shape data.
        cone = QConeMesh()
        cone.setTopRadius(0.5)
        cone.setBottomRadius(1)
        cone.setLength(3)
        cone.setRings(50)
        cone.setSlices(20)

        # ConeMesh transform.
        coneTransform = QTransform()
        coneTransform.setScale(1.5)
        coneTransform.setRotation(
                QQuaternion.fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0), 45.0))
        coneTransform.setTranslation(QVector3D(0.0, 4.0, -1.5))

        coneMaterial = QPhongMaterial()
        coneMaterial.setDiffuse(QColor(0x928327))

        # Cone.
        self.m_coneEntity = QEntity(self.m_rootEntity)
        self.m_coneEntity.addComponent(cone)
        self.m_coneEntity.addComponent(coneMaterial)
        self.m_coneEntity.addComponent(coneTransform)

        # Cylinder shape data.
        cylinder = QCylinderMesh()
        cylinder.setRadius(1)
        cylinder.setLength(3)
        cylinder.setRings(100)
        cylinder.setSlices(20)

        # CylinderMesh transform.
        cylinderTransform = QTransform()
        cylinderTransform.setScale(1.5)
        cylinderTransform.setRotation(
                QQuaternion.fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0), 45.0))
        cylinderTransform.setTranslation(QVector3D(-5.0, 4.0, -1.5))

        cylinderMaterial = QPhongMaterial()
        cylinderMaterial.setDiffuse(QColor(0x928327))

        # Cylinder.
        self.m_cylinderEntity = QEntity(self.m_rootEntity)
        self.m_cylinderEntity.addComponent(cylinder)
        self.m_cylinderEntity.addComponent(cylinderMaterial)
        self.m_cylinderEntity.addComponent(cylinderTransform)

        # Cuboid shape data.
        cuboid = QCuboidMesh()

        # CuboidMesh transform.
        cuboidTransform = QTransform()
        cuboidTransform.setScale(4.0)
        cuboidTransform.setTranslation(QVector3D(5.0, -4.0, 0.0))

        cuboidMaterial = QPhongMaterial()
        cuboidMaterial.setDiffuse(QColor(0x665423))

        # Cuboid.
        self.m_cuboidEntity = QEntity(self.m_rootEntity)
        self.m_cuboidEntity.addComponent(cuboid)
        self.m_cuboidEntity.addComponent(cuboidMaterial)
        self.m_cuboidEntity.addComponent(cuboidTransform)

        # Plane shape data.
        planeMesh = QPlaneMesh()
        planeMesh.setWidth(2)
        planeMesh.setHeight(2)

        # Plane mesh transform.
        planeTransform = QTransform()
        planeTransform.setScale(1.3)
        planeTransform.setRotation(
                QQuaternion.fromAxisAndAngle(QVector3D(1.0, 0.0, 0.0), 45.0))
        planeTransform.setTranslation(QVector3D(0.0, -4.0, 0.0))

        planeMaterial = QPhongMaterial()
        planeMaterial.setDiffuse(QColor(0xa69929))

        # Plane.
        self.m_planeEntity = QEntity(self.m_rootEntity)
        self.m_planeEntity.addComponent(planeMesh)
        self.m_planeEntity.addComponent(planeMaterial)
        self.m_planeEntity.addComponent(planeTransform)

        # Sphere shape data.
        sphereMesh = QSphereMesh()
        sphereMesh.setRings(20)
        sphereMesh.setSlices(20)
        sphereMesh.setRadius(2)

        # Sphere mesh transform.
        sphereTransform = QTransform()
        sphereTransform.setScale(1.3)
        sphereTransform.setTranslation(QVector3D(-5.0, -4.0, 0.0))

        sphereMaterial = QPhongMaterial()
        sphereMaterial.setDiffuse(QColor(0xa69929))

        # Sphere.
        self.m_sphereEntity = QEntity(self.m_rootEntity)
        self.m_sphereEntity.addComponent(sphereMesh)
        self.m_sphereEntity.addComponent(sphereMaterial)
        self.m_sphereEntity.addComponent(sphereTransform)

    @pyqtSlot(int)
    def enableTorus(self, enabled):
        self.m_torusEntity.setParent(self.m_rootEntity if enabled else None)

    @pyqtSlot(int)
    def enableCone(self, enabled):
        self.m_coneEntity.setParent(self.m_rootEntity if enabled else None)

    @pyqtSlot(int)
    def enableCylinder(self, enabled):
        self.m_cylinderEntity.setParent(self.m_rootEntity if enabled else None)

    @pyqtSlot(int)
    def enableCuboid(self, enabled):
        self.m_cuboidEntity.setParent(self.m_rootEntity if enabled else None)

    @pyqtSlot(int)
    def enablePlane(self, enabled):
        self.m_planeEntity.setParent(self.m_rootEntity if enabled else None)

    @pyqtSlot(int)
    def enableSphere(self, enabled):
        self.m_sphereEntity.setParent(self.m_rootEntity if enabled else None)


app = QApplication(sys.argv)

view = Qt3DWindow()
view.defaultFrameGraph().setClearColor(QColor(0x4d4d4f))
container = QWidget.createWindowContainer(view)
screenSize = view.screen().size()
container.setMinimumSize(QSize(200, 100))
container.setMaximumSize(screenSize)

widget = QWidget()
hLayout = QHBoxLayout(widget)
vLayout = QVBoxLayout()
hLayout.addWidget(container, 1)
hLayout.addLayout(vLayout)

widget.setWindowTitle("Basic shapes")

aspect = QInputAspect()
view.registerAspect(aspect)

# Root entity.
rootEntity = QEntity()

# Camera.
cameraEntity = view.camera()

cameraEntity.lens().setPerspectiveProjection(45.0, 16.0 / 9.0, 0.1, 1000.0)
cameraEntity.setPosition(QVector3D(0.0, 0.0, 20.0))
cameraEntity.setUpVector(QVector3D(0.0, 1.0, 0.0))
cameraEntity.setViewCenter(QVector3D(0.0, 0.0, 0.0))

# For camera controls.
camController = QFirstPersonCameraController(rootEntity)
camController.setCamera(cameraEntity)

# Scene modifier.
modifier = SceneModifier(rootEntity)

# Set root object of the scene.
view.setRootEntity(rootEntity)

# Create control widgets.
info = QCommandLinkButton(text="Qt3D ready-made meshes")
info.setDescription("Qt3D provides several ready-made meshes, like torus, "
        "cylinder, cone, cube, plane and sphere.")
info.setIconSize(QSize(0,0))

torusCB = QCheckBox(checked=True, text="Torus")
coneCB = QCheckBox(checked=True, text="Cone")
cylinderCB = QCheckBox(checked=True, text="Cylinder")
cuboidCB = QCheckBox(checked=True, text="Cuboid")
planeCB = QCheckBox(checked=True, text="Plane")
sphereCB = QCheckBox(checked=True, text="Sphere")

vLayout.addWidget(info)
vLayout.addWidget(torusCB)
vLayout.addWidget(coneCB)
vLayout.addWidget(cylinderCB)
vLayout.addWidget(cuboidCB)
vLayout.addWidget(planeCB)
vLayout.addWidget(sphereCB)

torusCB.stateChanged.connect(modifier.enableTorus)
coneCB.stateChanged.connect(modifier.enableCone)
cylinderCB.stateChanged.connect(modifier.enableCylinder)
cuboidCB.stateChanged.connect(modifier.enableCuboid)
planeCB.stateChanged.connect(modifier.enablePlane)
sphereCB.stateChanged.connect(modifier.enableSphere)

# Show the window.
widget.show()
widget.resize(1200, 800)

sys.exit(app.exec())
