three
Version:
JavaScript 3D library
109 lines (62 loc) • 2.03 kB
JavaScript
/**
* @author sunag / http://www.sunag.com.br/
*/
THREE.PositionNode = function ( scope ) {
THREE.TempNode.call( this, 'v3' );
this.scope = scope || THREE.PositionNode.LOCAL;
};
THREE.PositionNode.LOCAL = 'local';
THREE.PositionNode.WORLD = 'world';
THREE.PositionNode.VIEW = 'view';
THREE.PositionNode.PROJECTION = 'projection';
THREE.PositionNode.prototype = Object.create( THREE.TempNode.prototype );
THREE.PositionNode.prototype.constructor = THREE.PositionNode;
THREE.PositionNode.prototype.nodeType = "Position";
THREE.PositionNode.prototype.getType = function ( builder ) {
switch ( this.scope ) {
case THREE.PositionNode.PROJECTION:
return 'v4';
}
return this.type;
};
THREE.PositionNode.prototype.isShared = function ( builder ) {
switch ( this.scope ) {
case THREE.PositionNode.LOCAL:
case THREE.PositionNode.WORLD:
return false;
}
return true;
};
THREE.PositionNode.prototype.generate = function ( builder, output ) {
var material = builder.material;
var result;
switch ( this.scope ) {
case THREE.PositionNode.LOCAL:
material.requires.position = true;
if ( builder.isShader( 'vertex' ) ) result = 'transformed';
else result = 'vPosition';
break;
case THREE.PositionNode.WORLD:
material.requires.worldPosition = true;
if ( builder.isShader( 'vertex' ) ) result = 'vWPosition';
else result = 'vWPosition';
break;
case THREE.PositionNode.VIEW:
if ( builder.isShader( 'vertex' ) ) result = '-mvPosition.xyz';
else result = 'vViewPosition';
break;
case THREE.PositionNode.PROJECTION:
if ( builder.isShader( 'vertex' ) ) result = '(projectionMatrix * modelViewMatrix * vec4( position, 1.0 ))';
else result = 'vec4( 0.0 )';
break;
}
return builder.format( result, this.getType( builder ), output );
};
THREE.PositionNode.prototype.toJSON = function ( meta ) {
var data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.scope = this.scope;
}
return data;
};