Fast Height Render
also borrowed some code from psyark's BumpyPlanet:
http://wonderfl.kayac.com/code/d79cd85845773958620f42cb3e6cb363c2020c73
/**
* Copyright shaktool ( http://wonderfl.net/user/shaktool )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/6r8J
*/
// forked from shaktool's Metroid Prime Intro Surface
// forked from shaktool's Shaded Mountains
// forked from shaktool's White Mountains
// forked from shaktool's Red Mountains
// forked from mash's Bottle Glass Mountains
// also borrowed some code from psyark's BumpyPlanet:
// http://wonderfl.kayac.com/code/d79cd85845773958620f42cb3e6cb363c2020c73
package {
import flash.display.*;
import flash.events.*;
import flash.filters.*;
import flash.geom.*;
import flash.text.*;
import flash.utils.*;
[SWF(width=300, height=300, frameRate=24, backgroundColor=0x000000)]
public class Mountains extends Sprite {
private var heightMap:BitmapData = new BitmapData(300,300,false,0);
private var extrudedMap:BitmapData = new BitmapData(300,300,false,0);
private var texture:BitmapData = new BitmapData(300,300,false,0xffffff);
private var rotatedScape:BitmapData = new BitmapData(300,300,false,0);
private var shadedTexture:BitmapData = new BitmapData(300,300,true,0);
private var rotatedTexture:BitmapData = new BitmapData(300,300,true,0);
private var temp:BitmapData = new BitmapData(300,300,true,0);
private var displaceFilter:DisplacementMapFilter = new DisplacementMapFilter(extrudedMap,new Point(), 16, 4, 0, 64,"color",0x0,1);
private var a:Number = 0;
private var screenBuffer: BitmapData = new BitmapData(300,300,false,0);
private var normalMap:BitmapData;
public function Mountains() {
stage.align = StageAlign.BOTTOM;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.frameRate = 60;
var fade :Shape = new Shape();
heightMap.perlinNoise(200,200,6,Math.random()*int.MAX_VALUE,false,false, 7, true);
var matrix: Matrix = new Matrix();
matrix.createGradientBox(250,250,0,25,25);
fade.graphics.beginGradientFill("radial",[0xFFFFFF,0],[1,1],[127,255],matrix);
fade.graphics.drawRect(0,0,300,300);
texture.draw(fade,null,null,"multiply");
heightMap.draw(fade,null,null,"multiply");
normalMap = new NormalMap(heightMap, 0x80, 25)
addEventListener(Event.ENTER_FRAME, onEnterFrame);
addChild(new Bitmap(screenBuffer));
var light:Vector3D = new Vector3D();
light.x = -Math.cos(a-1.5) / Math.SQRT2;
light.y = Math.sin(a-1.5) / Math.SQRT2;
light.z = Math.sqrt(1 - light.x * light.x - light.y * light.y);
var lighting:ColorMatrixFilter = new ColorMatrixFilter([
2 * light.x, 2 * light.y, 2 * light.z, 0, (light.x + light.y + light.z) * -0xFF,
2 * light.x, 2 * light.y, 2 * light.z, 0, (light.x + light.y + light.z) * -0xFF,
2 * light.x, 2 * light.y, 2 * light.z, 0, (light.x + light.y + light.z) * -0xFF,
0, 0, 0, 1, 0
]);
shadedTexture.applyFilter(normalMap, normalMap.rect, normalMap.rect.topLeft, lighting);
shadedTexture.draw(texture, null, null, BlendMode.MULTIPLY);
}
private function onEnterFrame(event: Event): void {
rotatedScape.draw(heightMap,new Matrix(Math.cos(a-=(mouseX-150)/4000), 0.7*Math.sin(a), -Math.sin(a), 0.7*Math.cos(a), 150*(1-Math.cos(a)+Math.sin(a)), 105*(1-Math.sin(a)-Math.cos(a))),null,null,null,true);
rotatedTexture.draw(shadedTexture,new Matrix(Math.cos(a), 0.7*Math.sin(a), -Math.sin(a), 0.7*Math.cos(a), 150*(1-Math.cos(a)+Math.sin(a)), 105*(1-Math.sin(a)-Math.cos(a))),null,null,null,true);
//extrudedMap.fillRect(extrudedMap.rect,0);
var width2: int = extrudedMap.width;
var height2: int = extrudedMap.height;
extrudedMap.lock();
for (var y: int = 0; y < height2; y++) {
for (var x: int = 0; x < height2; x++) {
var value: uint = rotatedScape.getPixel(x,y) & 0xff;
if (value == 0) continue;
var newY: int = y + 32 - ((value)>>2);
extrudedMap.setPixel(x, newY, value);
extrudedMap.setPixel(x, newY + 1, value - 3);
extrudedMap.setPixel(x, newY + 2, value - 6);
//extrudedMap.setPixel(x, newY + 3, value - 9);
//extrudedMap.setPixel(x, newY + 4, value - 12);
}
}
extrudedMap.unlock();
//screenBuffer.fillRect(screenBuffer.rect,0);
//extrudedMap.applyFilter(extrudedMap,extrudedMap.rect,new Point(), new BlurFilter(4,4));
screenBuffer.applyFilter(rotatedTexture, rotatedTexture.rect, new Point(), displaceFilter);
//screenBuffer.draw(extrudedMap, new Matrix(1,0,0,1,0,0), null, "normal");
}
}
}
import flash.display.BitmapData;
import flash.geom.ColorTransform;
import flash.geom.Vector3D;
import flash.geom.Matrix3D;
class NormalMap extends BitmapData {
public function NormalMap(heightMap:BitmapData, seaHeight:uint, multiplier:Number) {
super(heightMap.width, heightMap.height, false);
var vec:Vector3D = new Vector3D();
for (var y:int=0; y<heightMap.height; y++) {
for (var x:int=0; x<heightMap.width; x++) {
var height:uint = heightMap.getPixel(x, y) & 0xFF;
vec.x = (height - (heightMap.getPixel((x + 1) % heightMap.width, y) & 0xFF)) / 0xFF * multiplier;
vec.y = (height - (heightMap.getPixel(x, (y + 1) % heightMap.height) & 0xFF)) / 0xFF * multiplier;
vec.z = 0;
if (vec.lengthSquared > 1) {
vec.normalize();
}
vec.z = Math.sqrt(1 - vec.lengthSquared);
setPixel(x, y,
(vec.x * 0x7F + 0x80) << 16 |
(vec.y * 0x7F + 0x80) << 8 |
(vec.z * 0x7F + 0x80)
);
}
}
}
}