[ui] Viewer3D: TransformGizmo - ready to be set with absolute values

- Now, we can set the transformation with a position vector, Euler angles and a scale vector.

meshroom/ui/components/scene3D.py

@@ -188,6 +188,29 @@ class Transformations3DHelper(QObject):
 
         return { "position": posMat, "rotation": rotMat, "scale": scaleMat, "quaternion": decomposition.get("quaternion") }
 
+    @Slot(QVector3D, QVector3D, QVector3D, result=QMatrix4x4)
+    def computeModelMatrixWithEuler(self, translation, rotation, scale):
+        """ Compute a model matrix from three Vector3D.
+            Args:
+                translation (QVector3D): position in space (x, y, z)
+                rotation (QVector3D): Euler angles in degrees (x, y, z)
+                scale (QVector3D): scale of the object (x, y, z)
+            Returns:
+                QMatrix4x4: corresponding model matrix
+        """
+        posMat = QMatrix4x4()
+        posMat.translate(translation)
+
+        quaternion = QQuaternion.fromEulerAngles(rotation)
+        rotMat = self.quaternionToRotationMatrix(quaternion)
+
+        scaleMat = QMatrix4x4()
+        scaleMat.scale(scale)
+
+        modelMat = posMat * rotMat * scaleMat
+
+        return modelMat
+
 
     #---------- "Private" Methods ----------#
 

meshroom/ui/qml/Viewer3D/EntityWithGizmo.qml

@@ -14,8 +14,10 @@ Entity {
     readonly property Camera camera : cameraController.camera
     readonly property var windowSize: cameraController.windowSize
     readonly property alias objectTransform : transformGizmo.objectTransform // The Transform the object should use
+    readonly property alias updateTransformations: transformGizmo.updateTransformations // Function to update the transformations
     
     signal pickedChanged(bool pressed)
+    signal gizmoChanged(var translation, var rotation, var scale)
 
     onPickedChanged: {
         cameraController.loseMouseFocus = pressed // Notify the camera if the transform takes/releases the focus
@@ -30,5 +32,8 @@ Entity {
         onPickedChanged: {
             root.pickedChanged(pressed)
         }
+        onGizmoChanged: {
+            root.gizmoChanged(translation, rotation, scale)
+        }
     }
 }

meshroom/ui/qml/Viewer3D/TransformGizmo.qml

@@ -14,9 +14,29 @@ Entity {
     property var windowSize
     property var frontLayerComponent
     property var window
-    readonly property Transform objectTransform : Transform {}
+
+    readonly property Transform objectTransform : Transform {
+        translation: gizmoDisplayTransform.translation
+        rotation: gizmoDisplayTransform.rotation
+        scale3D: Qt.vector3d(1,1,1)
+    }
+    readonly property var updateTransformations: function updateTransformations(translation, rotation, scale) {
+        const gizmoModelMat = Transformations3DHelper.computeModelMatrixWithEuler(translation, rotation, Qt.vector3d(1,1,1))
+        gizmoDisplayTransform.setMatrix(gizmoModelMat) // Update gizmo matrix and translation/rotation of the object (with binding)
+        objectTransform.scale3D = scale // Update the scale of the object
+    }
     
     signal pickedChanged(bool pressed)
+    signal gizmoChanged(var translation, var rotation, var scale)
+
+    function emitGizmoChanged() {
+        const translation = gizmoDisplayTransform.translation // Position in space
+        const rotation = Qt.vector3d(gizmoDisplayTransform.rotationX, gizmoDisplayTransform.rotationY, gizmoDisplayTransform.rotationZ) // Euler angles
+        const scale = objectTransform.scale3D // Scale of the object
+
+        updateTransformations(translation, rotation, scale) // Optional: just to make sure the absolute values work well
+        gizmoChanged(translation, rotation, scale)
+    }
 
     components: [gizmoDisplayTransform, mouseHandler, frontLayerComponent]
 
@@ -38,31 +58,27 @@ Entity {
     /***** TRANSFORMATIONS (using local vars) *****/
 
     function doRelativeTranslation(initialModelMatrix, translateVec) {
-        Transformations3DHelper.relativeLocalTranslate(gizmoDisplayTransform, initialModelMatrix.position, initialModelMatrix.rotation, initialModelMatrix.scale, translateVec) // Update gizmo matrix
-        Transformations3DHelper.relativeLocalTranslate(objectTransform, initialModelMatrix.position, initialModelMatrix.rotation, initialModelMatrix.scale, translateVec) // Update object matrix
+        Transformations3DHelper.relativeLocalTranslate(gizmoDisplayTransform, initialModelMatrix.position, initialModelMatrix.rotation, initialModelMatrix.scale, translateVec) // Update gizmo matrix and object matrix with binding
     }
 
     function doRelativeRotation(initialModelMatrix, axis, degree) {
-        Transformations3DHelper.relativeLocalRotate(gizmoDisplayTransform, initialModelMatrix.position, initialModelMatrix.quaternion, initialModelMatrix.scale, axis, degree) // Update gizmo matrix
-        Transformations3DHelper.relativeLocalRotate(objectTransform, initialModelMatrix.position, initialModelMatrix.quaternion, initialModelMatrix.scale, axis, degree) // Update object matrix
+        Transformations3DHelper.relativeLocalRotate(gizmoDisplayTransform, initialModelMatrix.position, initialModelMatrix.quaternion, initialModelMatrix.scale, axis, degree) // Update gizmo matrix and object matrix with binding
     }
 
     function doRelativeScale(initialModelMatrix, scaleVec) {
-        Transformations3DHelper.relativeLocalScale(objectTransform, initialModelMatrix.position, initialModelMatrix.rotation, initialModelMatrix.scale, scaleVec) // Update object matrix
+        Transformations3DHelper.relativeLocalScale(objectTransform, initialModelMatrix.position, initialModelMatrix.rotation, initialModelMatrix.scale, scaleVec) // Update only object matrix
     }
 
     function resetTranslation() {
-        gizmoDisplayTransform.translation = Qt.vector3d(0,0,0)
-        objectTransform.translation = Qt.vector3d(0,0,0)
+        gizmoDisplayTransform.translation = Qt.vector3d(0,0,0) // Reset gizmo matrix and object matrix with binding
     }
 
     function resetRotation() {
-        gizmoDisplayTransform.rotation = Qt.quaternion(1,0,0,0)
-        objectTransform.rotation = Qt.quaternion(1,0,0,0)
+        gizmoDisplayTransform.rotation = Qt.quaternion(1,0,0,0) // Reset gizmo matrix and object matrix with binding
     }
 
     function resetScale() {
-        objectTransform.scale3D = Qt.vector3d(1,1,1)
+        objectTransform.scale3D = Qt.vector3d(1,1,1) // Reset only object matrix
     }
 
     function resetATransformType(transformType) {
@@ -71,6 +87,7 @@ Entity {
             case TransformGizmo.Type.ROTATION: resetRotation(); break
             case TransformGizmo.Type.SCALE: resetScale(); break
         }
+        emitGizmoChanged()
     }
 
     /***** DEVICES *****/
@@ -84,7 +101,7 @@ Entity {
         property bool enabled: false
 
         onPositionChanged: {
-            if (objectPicker) {
+            if (objectPicker && objectPicker.button === Qt.LeftButton) {
                 // Get the selected axis
                 let pickedAxis
                 switch(objectPicker.gizmoAxis) {
@@ -137,7 +154,8 @@ Entity {
                         const gizmoToCameraVector = camera.position.toVector4d().minus(gizmoCenterPoint)
                         const orientation = gizmoLocalAxisVector.dotProduct(gizmoToCameraVector) > 0 ? 1 : -1
 
-                        if (angle !== 0) doRelativeRotation(objectPicker.modelMatrix, pickedAxis, angle*orientation)
+                        if (angle !== 0) doRelativeRotation(objectPicker.modelMatrix, pickedAxis, angle*orientation) // Do a rotation from the initial Object Model Matrix when we picked the gizmo
+
                         return
                     }
 
@@ -156,18 +174,23 @@ Entity {
                         let offset = (mouseVector.length() - scaleUnit) * sensibility
                         offset = (offset < 0) ? offset * 3 : offset // Used to make it more sensible when we want to reduce the scale (because the action field is shorter)
 
-                        if (offset) doRelativeScale(objectPicker.modelMatrix, pickedAxis.times(offset))
+                        if (offset) doRelativeScale(objectPicker.modelMatrix, pickedAxis.times(offset)) // Do a scale from the initial Object Model Matrix when we picked the gizmo
+                        
                         return
                     }
                 }
             }
-        }
-        onReleased: {
-            if(objectPicker && mouse.button === Qt.RightButton) {
+
+            if(objectPicker && objectPicker.button === Qt.RightButton) {
                 resetMenu.updateTypeBeforePopup(objectPicker.gizmoType)
                 resetMenu.popup(window)
             }
         }
+        onReleased: {
+            if(objectPicker && mouse.button === Qt.LeftButton) {
+                emitGizmoChanged()
+            }
+        }
     }
 
     Menu {

meshroom/ui/qml/Viewer3D/TransformGizmoPicker.qml

@@ -15,6 +15,7 @@ ObjectPicker {
     property int gizmoType
     property point screenPoint
     property var modelMatrix
+    property int button
     
     signal pickedChanged(var picker)
     
@@ -25,6 +26,7 @@ ObjectPicker {
         mouseController.objectPicker = this
         root.isPressed = true
         screenPoint = pick.position
+        button = pick.button
         pickedChanged(this)
     }
     onEntered: {