VRML: Merge transforms

collapse_transforms.wrl

#VRML V2.0 utf8

Viewpoint{
	description "Default"
}


DEF tr1 Transform {
	rotation 0.5 0.4 0.1 2
	children Transform {
		rotation 0.1 0.6 0.3 -0.8
		children Shape {
			appearance Appearance {
				material Material {
					diffuseColor 0 0 1
					emissiveColor 0.3 0 0
				}
			}
			geometry Box{size 4 1 2}
		}
	}
}

DEF tr2 Transform {
	children Shape {
		appearance Appearance {
			material Material {
				diffuseColor 0 0 1
				emissiveColor 0.3 0 0
				transparency 0.5
			}
		}
		geometry Box {
			size 5 2 3
		}
	}
}


Script {
	field	SFNode		tr1		USE	tr1
	field	SFNode		tr2		USE	tr2

	directOutput TRUE
	url "javascript:

	function collapse(outer_transform, inner_transform){
		var translation = new SFVec3f();
		var rotation = new SFRotation();
		var scale = new SFVec3f();
		var scaleOrientation = new SFRotation();
		var center = new SFVec3f();
		var matrix1 = new VrmlMatrix();
		var matrix2 = new VrmlMatrix();
		matrix1.setTransform(
			outer_transform.translation,
			outer_transform.rotation,
			outer_transform.scale,
			outer_transform.scaleOrientation,
			outer_transform.center
		);
		matrix2.setTransform(
			inner_transform.translation,
			inner_transform.rotation,
			inner_transform.scale,
			inner_transform.scaleOrientation,
			inner_transform.center
		);
		matrix1.multLeft(matrix2).getTransform(translation, rotation, scale, scaleOrientation, center);
		return Browser.createVrmlFromString('Transform{translation ' + translation + ' rotation ' + rotation + ' scale ' + scale + ' scaleOrientation ' + scaleOrientation + ' center ' + center + '}')[0];
	}

	function initialize(){
		var transform = collapse(tr1, tr1.children[0]);
		tr2.translation = transform.translation;
		tr2.rotation = transform.rotation;
		tr2.scale = transform.scale;
		tr2.scaleOrientation = transform.scaleOrientation;
		tr2.center = transform.center;
	}

	"
}