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+--- Thread: Moving and Efficient creation of SceneNodes (/showthread.php?tid=4265)
Moving and Efficient creation of SceneNodes - Marc - 06-11-2021
I have to create an scene with many independent meshes. I am using MeshObjectNode to create the SceneNode that are all appended to one root SceneNode. First of all I am not sure if this is the most efficient way of creating the objects, having one root scene node and then appending all of the different object's meshobjectnode.
Secondly, I would like to move each of the objects independently, but I am not sure how. I have seen in the examples that in order to move them all the examples use the SceneNodeVisual3D and then the transform of this object is changed. As far as I understand the SceneNodeVisual3D is a wpf object which is less efficient since I want to work directly with MeshObjectNode.
I have tried changing the Transform of the children SceneNodes but that does not move the mesh defined within the SceneNode. Am I missing anything?
RE: Moving and Efficient creation of SceneNodes - abenedik - 06-11-2021
You can change the transformation of SceneNodes with setting the Transform property. After that change, you also need to call NotifySceneNodeChange method on the changed SceneNode.
For example:
Code:
var transformMatrix = Matrix.Scaling(1, _orangePyramidYScale, 1) *
Matrix.RotationY(MathUtil.DegreesToRadians(_orangePyramidYRotate)) *
Matrix.Translation(0, -_orangePyramidYRotate, 0);
_orangePyramidObjectNode.Transform = new Transformation(ref transformMatrix);
// When the Transform is already set, you can change the matrix by:
//_orangePyramidObjectNode.Transform.SetMatrix(transformMatrix);
_orangePyramidObjectNode.NotifySceneNodeChange(SceneNode.SceneNodeDirtyFlags.TransformChanged);I have updated the ManuallyCreatedSceneNodes sample with sample code that shows how to change transformation.
You can check the new content of the files on the sample project on GitHub:
https://github.com/ab4d/Ab3d.DXEngine.Wpf.Samples/blob/master/Ab3d.DXEngine.Wpf.Samples/DXEngineAdvanced/ManuallyCreatedSceneNodes.xaml
https://github.com/ab4d/Ab3d.DXEngine.Wpf.Samples/blob/master/Ab3d.DXEngine.Wpf.Samples/DXEngineAdvanced/ManuallyCreatedSceneNodes.xaml.cs
RE: Moving and Efficient creation of SceneNodes - Marc - 06-11-2021
awesome thanks! i'll be back... hahaha