1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70

package org.papervision3d.materials.shadematerials
{
	import flash.display.BitmapData;
	import flash.display.Graphics;
	import flash.geom.Matrix;
	
	import org.papervision3d.core.geom.renderables.Triangle3D;
	import org.papervision3d.core.material.AbstractLightShadeMaterial;
	import org.papervision3d.core.math.Matrix3D;
	import org.papervision3d.core.proto.LightObject3D;
	import org.papervision3d.core.render.command.RenderTriangle;
	import org.papervision3d.core.render.data.RenderSessionData;
	import org.papervision3d.core.render.draw.ITriangleDrawer;
	import org.papervision3d.materials.utils.LightMaps;
	
	/**
	 *	@Author Ralph Hauwert
	 */
	public class FlatShadeMaterial extends AbstractLightShadeMaterial implements ITriangleDrawer
	{
		private static var currentColor:int;
		private static var zAngle:int;
		
		protected var _colors:Array;
		
		public function FlatShadeMaterial(light:LightObject3D, lightColor:uint=0xffffff, ambientColor:uint=0x000000, specularLevel:uint=0 )
		{
			super();
			this.fillAlpha = 1;
			this.light = light;
			_colors = LightMaps.getFlatMapArray(lightColor,ambientColor,specularLevel);
		}
		
		/**
		 * Localized stuff.
		 */
		private static var zd:Number;
		private static var x0:Number;
		private static var y0:Number;
		override public function drawTriangle(tri:RenderTriangle, graphics:Graphics, renderSessionData:RenderSessionData, altBitmap:BitmapData = null, altUV:Matrix = null):void
		{
			var face3D:Triangle3D = tri.triangle;
			lightMatrix = Matrix3D(lightMatrices[face3D.instance]);
			zd = face3D.faceNormal.x * lightMatrix.n31 + face3D.faceNormal.y * lightMatrix.n32 + face3D.faceNormal.z * lightMatrix.n33;
			
			if(zd < 0){
				if(doubleSided == false){
					zd = 0;
				}else{
					zd = Math.abs(zd);
				}
				
			};
			
			x0 = tri.v0.x;
		    y0 = tri.v0.y;
			zAngle = zd*0xff;
			currentColor = _colors[zAngle];
			
			graphics.beginFill(currentColor,fillAlpha);
			graphics.moveTo(x0, y0);
			graphics.lineTo(tri.v1.x, tri.v1.y);
			graphics.lineTo(tri.v2.x, tri.v2.y);
			graphics.lineTo(x0, y0);
			graphics.endFill();
			renderSessionData.renderStatistics.shadedTriangles++;
		}
		
	}
}