/**
* Copyright 9balls ( http://wonderfl.net/user/9balls )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/oPMx
*/
package
{
import com.adobe.utils.AGALMiniAssembler;
import flash.display.Sprite;
import flash.display.Stage3D;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.display3D.Context3D;
import flash.display3D.Context3DProgramType;
import flash.display3D.Context3DRenderMode;
import flash.display3D.Context3DTextureFormat;
import flash.display3D.Context3DVertexBufferFormat;
import flash.display3D.IndexBuffer3D;
import flash.display3D.Program3D;
import flash.display3D.textures.Texture;
import flash.display3D.VertexBuffer3D;
import flash.events.Event;
import flash.geom.Matrix3D;
import flash.geom.Vector3D;
import flash.text.TextField;
import flash.utils.ByteArray;
public class Main extends Sprite
{
private var num:uint = 1000;
private var angle:Number = 0;
private var stage3D:Stage3D;
private var context3D:Context3D;
private var program1:Program3D;
private var program2:Program3D;
private var program3:Program3D;
private var indexBuffer:IndexBuffer3D;
private var mtx:Matrix3D;
private var axis:Vector3D;
private var point:Vector3D;
private var texture:Texture;
private var screen:Texture;
private var screenIndexBuffer:IndexBuffer3D;
private var screenMtx:Matrix3D;
private var screenVertexBuffer:VertexBuffer3D;
private var vertexBuffer:VertexBuffer3D;
public function Main():void
{
stage.frameRate = 60;
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
stage3D = stage.stage3Ds[0];
stage3D.x = 0;
stage3D.y = 0;
stage3D.addEventListener(Event.CONTEXT3D_CREATE, onContextCreate);
stage3D.requestContext3D(Context3DRenderMode.AUTO);
}
private function onContextCreate(e:Event):void
{
context3D = stage3D.context3D;
context3D.configureBackBuffer(400, 400, 0, false);
//create
createShaders();
setConstant();
setBuffer();
texture = context3D.createTexture(32, 32, Context3DTextureFormat.BGRA, true);
screen = context3D.createTexture(512, 512, Context3DTextureFormat.BGRA, true);
//run
addEventListener(Event.ENTER_FRAME, onEnter);
}
private function onEnter(e:Event):void
{
context3D.setVertexBufferAt(0, vertexBuffer, 0, Context3DVertexBufferFormat.FLOAT_3);
context3D.setVertexBufferAt(1, vertexBuffer, 3, Context3DVertexBufferFormat.FLOAT_3);
mtx = new Matrix3D();
mtx.appendRotation(angle, axis, point);
angle += 0.1;
mtx.appendScale(1 / 256, 1 / 256, 1);
context3D.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX, 0, mtx, false);
context3D.setProgram(program1);
context3D.setRenderToTexture(screen);
context3D.clear(0, 0, 0, 1);
context3D.drawTriangles(indexBuffer);
context3D.setVertexBufferAt(0, screenVertexBuffer, 0, Context3DVertexBufferFormat.FLOAT_2);
context3D.setVertexBufferAt(1, screenVertexBuffer, 2, Context3DVertexBufferFormat.FLOAT_2);
context3D.setProgramConstantsFromMatrix(Context3DProgramType.VERTEX, 0, screenMtx, false);
context3D.setProgram(program2);
context3D.setRenderToTexture(texture);
context3D.setTextureAt(0, screen);
context3D.clear(0, 0, 0, 1);
context3D.drawTriangles(screenIndexBuffer);
context3D.setProgram(program3);
context3D.setRenderToBackBuffer();
context3D.setTextureAt(0, screen);
context3D.setTextureAt(1, texture);
context3D.clear(0, 0, 0, 1);
context3D.drawTriangles(screenIndexBuffer);
context3D.present();
context3D.setTextureAt(0, null);
context3D.setTextureAt(1, null);
}
private function createShaders():void
{
//create shaders
var agalAssembler:AGALMiniAssembler = new AGALMiniAssembler();
//vertex
var vertexShader:ByteArray = agalAssembler.assemble(Context3DProgramType.VERTEX, "m44 op, va0, vc0 \n" + "mov v0, va1\n");
//fragment
var code:String = "";
code += "mov ft0 v0\n";
code += "mov oc, ft0\n";
var fragmentShader:ByteArray = agalAssembler.assemble(Context3DProgramType.FRAGMENT, code);
program1 = context3D.createProgram();
program1.upload(vertexShader, fragmentShader);
code = "";
code += "mov ft0 v0\n";
code += "tex ft0, ft0, fs0<2d,repeat,linear>\n";
code += "mov oc, ft0\n";
fragmentShader = agalAssembler.assemble(Context3DProgramType.FRAGMENT, code);
program2 = context3D.createProgram();
program2.upload(vertexShader, fragmentShader);
code = "";
code += "mov ft0 v0\n";
code += "tex ft1, ft0, fs0<2d,repeat,linear>\n";
code += "tex ft0, ft0, fs1<2d,repeat,linear>\n";
code += "add ft0, ft0, ft1\n";
code += "mov oc, ft0\n";
fragmentShader = agalAssembler.assemble(Context3DProgramType.FRAGMENT, code);
program3 = context3D.createProgram();
program3.upload(vertexShader, fragmentShader);
}
private function setConstant():void
{
//vc
mtx = new Matrix3D();
axis = new Vector3D(0, 0, 1);
point = new Vector3D(0, 0, 0);
screenMtx = new Matrix3D();
}
private function setBuffer():void
{
//vertex buffer
vertexBuffer = context3D.createVertexBuffer(10 * num, 6);
var particles:Vector. = new Vector.();
var indices:Vector. = new Vector.();
for (var i:int = 0; i < num; i++) {
particles = particles.concat(createParticle((Math.random() - 0.5) * 1400, (Math.random() - 0.5) * 1400, Math.random() * 0xFFFFFF));
var s:uint = 10 * i;
indices = indices.concat(Vector.([s + 1, s + 9, s + 0,
s + 3, s + 1, s + 2,
s + 5, s + 3, s + 4,
s + 6, s + 7, s + 5,
s + 7, s + 8, s + 9,
s + 1, s + 3, s + 9,
s + 9, s + 3, s + 5,
s + 9, s + 5, s + 7
]));
}
vertexBuffer.uploadFromVector(particles, 0, 10 * num);
//index buffer
indexBuffer = context3D.createIndexBuffer(24 * num);
indexBuffer.uploadFromVector(indices, 0, 24 * num);
//vertex buffer
screenVertexBuffer = context3D.createVertexBuffer(4, 4);
screenVertexBuffer.uploadFromVector(Vector.([-1, -1, 0, 1, -1, 1, 0, 0, 1, -1, 1, 1, 1, 1, 1, 0]), 0, 4);
//index buffer
screenIndexBuffer = context3D.createIndexBuffer(6);
screenIndexBuffer.uploadFromVector(Vector.([0, 1, 2, 1, 2, 3]), 0, 6);
}
private function createParticle(xPos:Number, yPos:Number, color:uint):Vector.
{
var scale:Number = 4;
var r:Number = (color >> 16) / 255;
var g:Number = (color >> 8 & 0xFF) / 255;
var b:Number = (color & 0xFF) / 255;
return Vector.([xPos + 0.0000 * scale, yPos + 2.3006 * scale, 0, r, g, b, xPos + 0.7475 * scale, yPos + 0.7860 * scale, 0, r, g, b, xPos + 2.4190 * scale, yPos + 0.5431 * scale, 0, r, g, b, xPos + 1.2095 * scale, yPos + -0.6359 * scale, 0, r, g, b, xPos + 1.4950 * scale, yPos + -2.3006 * scale, 0, r, g, b,
xPos + 0.0000 * scale, yPos + -1.5146 * scale, 0, r, g, b, xPos + -1.4950 * scale, yPos + -2.3006 * scale, 0, r, g, b, xPos + -1.2095 * scale, yPos + -0.6359 * scale, 0, r, g, b, xPos + -2.4190 * scale, yPos + 0.5431 * scale, 0, r, g, b, xPos + -0.7475 * scale, yPos + 0.7860 * scale, 0, r, g, b]);
}
}
}
