orientedshape3drendermethod.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: OrientedShape3DRenderMethod.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision: 1.6 $
 * $Date: 2007/02/09 17:18:13 $
 * $State: Exp $
 */

package javax.media.j3d;

/**
 * The OrientedShape3DRenderMethod provides a render method to render
 * OrientedShape3D nodes.
 * The RenderMethod interface is used to create various ways to render
 * different geometries.
 */

class OrientedShape3DRenderMethod implements RenderMethod {

    public boolean render(RenderMolecule rm, Canvas3D cv, 
			  RenderAtomListInfo ra, int dirtyBits) {
        boolean useAlpha;
	boolean isNonUniformScale;
	Transform3D trans=null;
	
        useAlpha = rm.useAlpha;
	
        GeometryArrayRetained geo = (GeometryArrayRetained)ra.geometry();
        geo.setVertexFormat((rm.useAlpha && 
			     ((geo.vertexFormat & GeometryArray.COLOR) != 0)), 
			    rm.textureBin.attributeBin.ignoreVertexColors, cv.ctx);
	
	if (rm.doInfinite) {
	    cv.updateState(dirtyBits);
	    while (ra != null) {
		trans = ra.infLocalToVworld;
		isNonUniformScale = !trans.isCongruent();
		
		cv.setModelViewMatrix(cv.ctx, cv.vworldToEc.mat, trans);
		ra.geometry().execute(cv, ra.renderAtom, isNonUniformScale,
			(useAlpha && ra.geometry().noAlpha),
			rm.alpha,
			cv.screen.screen,
			rm.textureBin.attributeBin.ignoreVertexColors);
		ra = ra.next;
	    }
	    return true;
	}
	
	boolean isVisible = false; // True if any of the RAs is visible.	
	while (ra != null) {
	    if (cv.ra == ra.renderAtom) {
		if (cv.raIsVisible) {
		    cv.updateState(dirtyBits);
		    trans = ra.localToVworld;
		    isNonUniformScale = !trans.isCongruent();

		    cv.setModelViewMatrix(cv.ctx, cv.vworldToEc.mat, trans);
		    ra.geometry().execute(cv, ra.renderAtom, isNonUniformScale,
					  (useAlpha && ra.geometry().noAlpha),
					  rm.alpha,
					  cv.screen.screen,
					  rm.textureBin.attributeBin.
					  ignoreVertexColors);
		    isVisible = true;
		}
	    }
	    else {
		if (!VirtualUniverse.mc.viewFrustumCulling ||
		    ra.renderAtom.localeVwcBounds.intersect(cv.viewFrustum)) {
		    cv.updateState(dirtyBits);
		    cv.raIsVisible = true;
		    trans = ra.localToVworld;
		    isNonUniformScale = !trans.isCongruent();
		    
		    cv.setModelViewMatrix(cv.ctx, cv.vworldToEc.mat, trans);
		    ra.geometry().execute(cv, ra.renderAtom, isNonUniformScale,
					  (useAlpha && ra.geometry().noAlpha),
					  rm.alpha,
					  cv.screen.screen,
					  rm.textureBin.attributeBin.
					  ignoreVertexColors);
		    isVisible = true;
		}
		else {
		    cv.raIsVisible = false;
		}
		cv.ra = ra.renderAtom;
		
	    }
	    ra = ra.next;
	    
	}
	

        geo.disableGlobalAlpha(cv.ctx, 
			       (rm.useAlpha && 
				((geo.vertexFormat & GeometryArray.COLOR) != 0)), 
			       rm.textureBin.attributeBin.ignoreVertexColors);
	return isVisible;
    }
}