code on 2009-1-23

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license : All rights reserved
modified : 2009-01-23 15:56:00

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/**
 * 25-Line ActionScript Contest Entry
 * 
 * Project: Flight 25
 * Author:  Petri Leskinen, leskinen.petri[at]luukku.com, http://pixelero.wordpress.com
 * Date:    10 January 2009
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
 
// 3 free lines! Alter the parameters of the following lines or remove them.
// Do not substitute other code for the three lines in this section
[SWF(width=800, height=450, backgroundColor=0xE8F0F8, frameRate=25)]
stage.align = StageAlign.TOP;
stage.scaleMode = StageScaleMode.NO_BORDER;
// 25 lines begins here!

var n:int = 32, m:int = 32, vertices:Vector.<Number> = new Vector.<Number>(),	indices:Vector.<int>  = new Vector.<int>(),uvtData:Vector.<Number> = new Vector.<Number>(), projectedVerts:Vector.<Number> = new Vector.<Number>(n*m*4), perlinTerrain:BitmapData =new BitmapData(n,m,false),heightGradient:BitmapData = new BitmapData(288,2,false,0xE8F0F8), newBitmap:BitmapData = heightGradient.clone(),perlinPoint:Point = new Point(),	i:int, j:int, ii:int=0, ij:int, ix:Number, iy:Number, tmp:Number, phase:Number=0.0, projectionMatrix:Matrix3D,rotAngle:Number = 0.25*Math.PI;
		
heightGradient.setVector( new Rectangle(0, 0, heightGradient.width, 1), Vector.<uint>([0xebe9da, 0xebe1db, 0xe9e9da, 0xebe3cf, 0xe9ebce, 0xebe9cd, 0xe9e9cd, 0xe3e1cb, 0xebe3ca, 0xe3e9c9, 0xe1e9cb, 0xe1e9cf, 0xe3e3cf, 0xe1e3c5, 0xe9ebc5, 0xebe3c3, 0xe1ebc3, 0xebe3ca, 0xe1dfcb, 0xebdfca, 0xe1ddbf, 0xe1ddbf, 0xe1dbbf, 0xe3dbbe, 0xe3dbbb, 0xebdaba, 0xe3dfb9, 0xebdfba, 0xe9d5b7, 0xebddbe, 0xe1dbbf, 0xe1dbb7, 0xebd3bf, 0xe3dab6, 0xe3dab4, 0xebdbbd, 0xe1d3bf, 0xe9d3b4, 0xe9dbb6, 0xebdbb5, 0xe9d2b6, 0xe9dbbd, 0xe3dbb5,0xebdabe,0xebd2b6, 0xe9dab6, 0xe1d3bd, 0xebd2b5, 0xe3d2bc, 0xdbcaaf, 0xd5caa7, 0xcfbb9e, 0xcbb39c, 0xc3aa8e, 0xbda28d, 0xbf9a7c, 0xb39a74, 0xab8b6d, 0xa5826c, 0x9f7b5d, 0x997255, 0x9b6b4d, 0x8d624e, 0x875a3c, 0x875a3c, 0x885b3f, 0x8b5d3e, 0x8a5f3f, 0x8b5e48, 0x8c5f41, 0x8d604a, 0x8e6143, 0x8f6a4f, 0x92634f, 0x91644f, 0x926547, 0x936f48, 0x9e6f49, 0x9f684a, 0x96694b, 0x966b4b, 0x936f49, 0x8c6f4f, 0x876b47, 0x82634b, 0x7d5f4b, 0x7a5f3f, 0x735b3d, 0x6e5b3b, 0x6b5f3b, 0x6c5f37, 0x5f5335, 0x5a5933, 0x574f33,0x5a4d2f,0x4b4b2d,0x4b4b2d,0x4b4b2d,0x4f472f,0x474d2f,0x43432d,0x41492f,0x3f3f2d,0x3d3d2d, 0x3b3b2d, 0x393b2f, 0x37372d, 0x3f372d, 0x33332d, 0x3b332d, 0x2f2f2f, 0x2f2d2f, 0x2d2d2f, 0x2c302c, 0x2b332b, 0x2a3e2a, 0x2b3b2b, 0x2a3e29, 0x2f3f2f, 0x264a27, 0x274f25, 0x24482f, 0x2b4b23, 0x224f2a, 0x215121, 0x2a5622, 0x1f5f1f, 0x1e5a1f, 0x1e5b1f, 0x225b23, 0x265f2c, 0x2a5d27, 0x2e5e2b, 0x3a5f2f, 0x3e683b, 0x3a6933, 0x3e6a3e, 0x42633b, 0x4e643f, 0x4a6f3f, 0x4e674a, 0x5a6745, 0x5e6848, 0x5a6b4b, 0x5a694b, 0x5a6f57, 0x5a7f5f, 0x5a7b62, 0x5a8162, 0x5a8768, 0x5a8f70, 0x5a9374, 0x729970, 0x6F9f62, 0x72ad60, 0x7aab6f, 0x95Ab80,0x6ed5de, 0x5acbdb, 0x5abdcb, 0x5ac3db, 0x5ebbcf, 0x5abbcf, 0x4eabc9, 0x4aabcf, 0x5eabd3, 0x4a93c0, 0x3e8bbd, 0x3a8bba, 0x3e7bb7, 0x3273b6, 0x2e6bb1, 0x2a6bae, 0x3e6bbb, 0x2a5baa, 0x1e4ba7, 0x1e4baf, 0x1e4baa, 0x1e4b9f, 0x1e4a9e, 0x1e4799, 0x1e4696, 0x1e4f9b, 0x1e4f90, 0x1e4b8d, 0x1e4a8b, 0x1e498f, 0x1e4887, 0x1e3f89, 0x1e3f7f, 0x1e3f7b, 0x1e3f7a, 0x1e3e79, 0x1f3f78, 0x203e7a,0x2b3c7a,0x223c79,0x2b3d79,0x2e3f79,0x2d3d79,0x263c7a,0x273d79,0x283e78,0x293e78, 0x2a3d78, 0x2b3c7a, 0x2c3d7b, 0x2d3d78, 0x2f3f78, 0x2e3d7b, 0x2b3e7b, 0x2a3f79, 0x294978, 0x2a4b7a, 0x27427a, 0x264b79, 0x2d447a, 0x2c4d7b, 0x2b4f7a, 0x2a4778, 0x294879, 0x204979, 0x1f4b79, 0x1e4b7b, 0x1e4b79, 0x1e4d79, 0x1e4d7a, 0x1e4f7b, 0x1e4f7d, 0x1e587d, 0x1e537f, 0x1e537f, 0x1e5b81, 0x1e5489, 0x1e5d8b, 0x1e5f83, 0x1e5f85, 0x1e5985, 0x1e5b8f, 0x1e5b87, 0x1e5a8f, 0x1e5a86, 0x1e5e85, 0x1e5f8d, 0x1e5283, 0x1e5b8a, 0x1e4e8b, 0x1e4d8a, 0x1e4b7f, 0x1e4a7e, 0x1e477f, 0x1e457f, 0x1e437b, 0x1e407a, 0x1e3e79, 0x1e3d7a, 0x1e3c78, 0x2b477f, 0x3a5b8f, 0x455d8f, 0x5a6a96, 0x5f7b9b, 0x6e7eaa, 0x798ba9, 0x8694b1, 0x939fb7, 0xaaabbe, 0xadbfc7, 0xbac2cd, 0xcfcbd3, 0xdcd6db, 0xebebeb, 0xe9e3e1, 0xe0e3e8, 0xdfdfdf, 0xdedfde, 0xdddfdd, 0xdcdddf, 0xdbdbdb, 0xdadbda, 0xd9dbd9, 0xd8d9d8, 0xdfd7d7, 0xdedede, 0xd7dddd, 0xd4d6dd, 0xd3d3db, 0xdad2d2]));
			
x=stage.stageWidth/2.0;
		
y=stage.stageHeight/2.0;
		
for (i = 0 ; i != n; i++) for (j = 0 ; j != m; j++) {
		
	vertices.push((ix= 1.0001 - i / (n - 1))+(iy= j/(m-1)-1.0),0.0,ix-iy,iy+ix,-0.2, ix-iy );
				
	uvtData.push( j / m, 0.9 * (tmp=Math.max(1.0 - j / m, 1.0 - i / n)), 1.0, 0.99, tmp, 1.0);

}

for (i=0 ; i!=n-1; i++) {
	
	for (j=0 ; j!=m-1; j++) indices.push(	ii,ii+m+m+2,ii+2,ii+m+m, ii+m+m +2, ii ,++ii,ii+2 ,ii+m+m+2 ,ii+m+m , ii , (ii++)+m+m + 2);		
	
	ii+=2; 
	
}
	
addEventListener(Event.ENTER_FRAME, function update(e:Event = null, ii:int=0):void {
	
	perlinTerrain.perlinNoise(n, m, 5, 11, false, true, 4, false, [ perlinPoint = new Point( perlinPoint.x -= 0.5 * Math.sin(rotAngle = (15.0 * rotAngle + Math.max(-0.5, Math.min((tmp = 0.5*Math.PI * ((i = perlinTerrain.getPixel(n - 3, m - 1) + perlinTerrain.getPixel(n - 2, m - 1)) - 0x70) / (i - (perlinTerrain.getPixel(n - 1, m - 3) + perlinTerrain.getPixel(n - 1, m - 2)) +0.01) ),2.0))) / 16.0),perlinPoint.y -= 0.5 * Math.cos(rotAngle)),perlinPoint, perlinPoint, perlinPoint, perlinPoint	]);
	
	ij = ( (ij  = perlinTerrain.getPixel(n - 1, m - 1))  > 128) ?  128-20 : ij -20;
	
	tmp = 1.0 / (1.2 + Math.sin(0.333*(phase += 0.02)));

for (i=0 ; i!=n; i++) for (j = 0 ; j != m; j++) {
			
		vertices[ii + 1] = Math.min(0.1,Math.pow((uvtData[ii] = perlinTerrain.getPixel(i, j) / 0xFF),tmp) - Math.pow(ij / 0xFF, tmp)) ;
			 
		uvtData[ii + 3] = 1.0 - (0.15+0.05*Math.cos(phase)) * uvtData[(ii += 6)-6];
			
	}
		
	(projectionMatrix = new PerspectiveProjection().toMatrix3D()).appendRotation(-12.0 * (rotAngle-Math.PI/4) / Math.PI, Vector3D.Z_AXIS);
	
	Utils3D.projectVectors(projectionMatrix, vertices,projectedVerts, uvtData);

newBitmap.applyFilter(heightGradient, heightGradient.rect,new Point(), new ColorMatrixFilter([1.0, tmp=0.2+0.25*Math.cos(phase), tmp, 0,  -tmp*(0xF0+0xF8),tmp*=1.0,1.0,tmp, 0, -tmp*(0xE8+0xF8),tmp*=0.7,tmp,1.0, 0, -tmp*(0xE8+0xF0),0.0, 0.0, 0.0, 1.0, 0.0]));
	
	graphics.clear();
	
	graphics.beginBitmapFill(newBitmap, null, false, true);	
		
	graphics.drawTriangles(projectedVerts,indices,uvtData, TriangleCulling.POSITIVE);
		
} );
		
// 25 lines ends here!

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