ConstantScreenSizeTransform (object)¶

バージョン 1.12.0 で追加.

The ConstantScreenSizeTransform inherits the InlineTransform object to represent a nestable transform without animation. The ConstantScreenSizeTransform supports, as dictated by the interface, nesting of transforms to represent scene hierarchies, and uses caching to ensure avoiding recomputation of hierarchies.

The ConstantScreenSizeTransform is used to drive the transforms of gizmos and HUD objects whose size needs to remain constant irrespective of the distance to the camera. When uploading the transform the to the GPU, the transform value provided is scaled according to the distance to the camera.

The OGLConstantScreenSizeTransformAdaptor is used to manage the uploading of the ConstantScreenSizeTransform, and in it’s ‘draw’ method, the distance to the camera is computed.

/*
** Example: ConstantScreenSizeTransform
*/

require InlineDrawing;
  
operator entry() {

  
    InlineDrawing drawing = OGLInlineDrawing_GetInstance();
  
    PolygonMesh mesh();
    Size detail = 24;
    Scalar innerRadius = 0.02;
    Scalar outerRadius = 0.8;
    mesh.addTorus(Xfo(), innerRadius, outerRadius, detail, true, false);
  
    InlineMeshShape shape('HUD_Shape', mesh);
  
    ConstantScreenSizeTransform hudTransform('HUD_Transform', Xfo(Vec3(5, 0, 0)));
    drawing.getRoot().addChild(hudTransform);
  
    InlineShader surfaceShader = drawing.registerShader(OGLSurfaceShader);
    InlineMaterial hudMaterial = surfaceShader.getOrCreateMaterial('HUD_Material');
  
    InlineInstance instance('HUD', hudTransform, shape);
  
  
}

/*
** Output:


*/

Methods¶

	ConstantScreenSizeTransform ( in ConstantScreenSizeTransform other )
	ConstantScreenSizeTransform ( in String name )
	ConstantScreenSizeTransform ( in String name, in Xfo xfo )
	ConstantScreenSizeTransform ( in String name, io InlineTransform parent, in Xfo xfo )
	ConstantScreenSizeTransform ()
ConstantScreenSizeTransform	clone ? ()