/*******************************************************************************
 * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.shapes;

import com.jme.renderer.ColorRGBA;
import com.jme.renderer.Renderer;
import com.jme.scene.Geometry;
import com.jme.scene.Line;
import com.jme.scene.state.MaterialState;
import com.jme.util.geom.BufferUtils;

public class GridShape {
    
 
	public static Geometry getShape(Renderer renderer, int lineCount, float delta) {
	    
        float[] coords = new float[lineCount*lineCount*2*3];
        float size = delta * lineCount;
        float halfSize = size * 0.5f;
        
        for (int i = 0 ; i <= lineCount; i++) {
            int index = i*3*2;
            coords[index++] = -halfSize + i * delta;
            coords[index++] = 0.f;
            coords[index++] = -halfSize;
            coords[index++] = -halfSize + i * delta;
            coords[index++] = 0.f;
            coords[index++] = +halfSize;
        }
        for (int i = 0 ; i <= lineCount; i++) {
            int index = (i + lineCount + 1)*3*2;
            coords[index++] = -halfSize;
            coords[index++] = 0.f;
            coords[index++] = -halfSize + i * delta;
            coords[index++] = +halfSize;
            coords[index++] = 0.f;
            coords[index++] = -halfSize + i * delta;
        }

        Line shape = new Line("",BufferUtils.createFloatBuffer(coords),null,null,null);
        MaterialState ms = renderer.createMaterialState();
        ms.setEmissive(new ColorRGBA(1.f,1.f,1.f,0.f));
        shape.setRenderState(ms);
        shape.setCullMode(Geometry.CULL_NEVER);
        return shape;
       
    }

}