三角形を使って立方体：陰面消去
/**
* Copyright _wonder ( http://wonderfl.net/user/_wonder )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/cUdq
*/
// forked from _wonder's 三角形を使って立方体：3Dの回転
// forked from _wonder's 三角形を使う：3Dの回転
// forked from _wonder's 3Dの回転 平面
// forked from _wonder's 3Dの回転 線だけ2
// forked from _wonder's 3Dの回転 線だけ
// forked from _wonder's 3Dの回転 + 線
// forked from _wonder's 3Dの回転
// forked from _wonder's 複数のボール跳ね返り3D
// forked from _wonder's 跳ね返り3D
// forked from _wonder's ボールを動かす3D
// forked from _wonder's 遠ざかるボール
// forked from _wonder's base
package {
import flash.display.Sprite;
import flash.events.Event;
public class Triangles2 extends Sprite {
private var points:Array;
private var triangles:Array;
private var fl:Number = 250;
private var vpX:Number = stage.stageWidth / 2;
private var vpY:Number = stage.stageHeight / 2;
public function Triangles2() {
points = new Array();
points[0] = new Point3D( -100, -100, -100 );
points[1] = new Point3D( 100, -100, -100 );
points[2] = new Point3D( 100, 100, -100 );
points[3] = new Point3D( -100, 100, -100 );
points[4] = new Point3D( -100, -100, 100 );
points[5] = new Point3D( 100, -100, 100 );
points[6] = new Point3D( 100, 100, 100 );
points[7] = new Point3D( -100, 100, 100 );
for( var i:uint = 0; i < points.length; i++ ){
points[i].setVanishingPoint( vpX, vpY );
points[i].setCenter(0, 0, 200 );
}
triangles = new Array();
triangles[0] = new Triangle( points[0], points[1], points[2], 0x6666cc);
triangles[1] = new Triangle( points[0], points[2], points[3], 0x6666cc);
triangles[2] = new Triangle( points[0], points[5], points[1], 0x66cc66);
triangles[3] = new Triangle( points[0], points[4], points[5], 0x66cc66);
triangles[4] = new Triangle( points[4], points[6], points[5], 0xcc6666);
triangles[5] = new Triangle( points[4], points[7], points[6], 0xcc6666);
triangles[6] = new Triangle( points[3], points[2], points[6], 0xcc66cc);
triangles[7] = new Triangle( points[3], points[6], points[7], 0xcc66cc);
triangles[8] = new Triangle( points[1], points[5], points[6], 0x66cccc);
triangles[9] = new Triangle( points[1], points[6], points[2], 0x66cccc);
triangles[10] = new Triangle( points[4], points[0], points[3], 0xcccc66);
triangles[11] = new Triangle( points[4], points[3], points[7], 0xcccc66);
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
private function onEnterFrame(e:Event):void {
var angleY:Number = ( mouseX - vpX ) * 0.0002;
var angleX:Number = ( mouseY - vpY ) * 0.0002;
for( var i:uint = 0; i < points.length; i++ ){
var point:Point3D = points[i];
point.rotateX( angleX );
point.rotateY( angleY );
}
triangles.sortOn("depth", Array.DESCENDING | Array.NUMERIC);
graphics.clear();
for( i = 0; i < triangles.length; i++ ){
triangles[i].draw( graphics );
}
}
}
}
import flash.display.Graphics;
class Triangle {
private var pointA:Point3D;
private var pointB:Point3D;
private var pointC:Point3D;
private var color:uint;
public function Triangle ( a:Point3D, b:Point3D, c:Point3D, color:uint ){
pointA = a;
pointB = b;
pointC = c;
this.color = color;
}
public function draw(g:Graphics):void {
if( isBackFace() ){
return;
}
g.beginFill( color );
g.moveTo( pointA.screenX, pointA.screenY );
g.lineTo( pointB.screenX, pointB.screenY );
g.lineTo( pointC.screenX, pointC.screenY );
g.lineTo( pointA.screenX, pointA.screenY );
g.endFill();
}
private function isBackFace():Boolean{
var cax:Number = pointC.screenX - pointA.screenX;
var cay:Number = pointC.screenY - pointA.screenY;
var bcx:Number = pointB.screenX - pointC.screenX;
var bcy:Number = pointB.screenY - pointC.screenY;
return cax * bcy > cay * bcx;
}
public function get depth():Number {
var zpos:Number = Math.min( pointA.z, pointB.z );
zpos = Math.min(zpos, pointC.z);
return zpos;
}
}
class Point3D {
public var fl:Number = 250;
private var vpX:Number = 0;
private var vpY:Number = 0;
private var cX:Number = 0;
private var cY:Number = 0;
private var cZ:Number = 0;
public var x:Number = 0;
public var y:Number = 0;
public var z:Number = 0;
public function Point3D( x:Number=0, y:Number=0, z:Number=0 ){
this.x = x;
this.y = y;
this.z = z;
}
public function setVanishingPoint( vpX:Number, vpY:Number ):void {
this.vpX = vpX;
this.vpY = vpY;
}
public function setCenter( cX:Number, cY:Number, cZ:Number=0 ):void {
this.cX = cX;
this.cY = cY;
this.cZ = cZ;
}
public function get screenX():Number {
var scale:Number = fl / ( fl + z + cZ );
return vpX + cX + x * scale;
}
public function get screenY():Number {
var scale:Number = fl / ( fl + z + cZ );
return vpY + cY + y * scale;
}
public function rotateX( angleX:Number ):void {
var cosX:Number = Math.cos( angleX );
var sinX:Number = Math.sin( angleX );
var y1:Number = y * cosX - z * sinX;
var z1:Number = z * cosX + y * sinX;
y = y1;
z = z1;
}
public function rotateY( angleY:Number ):void {
var cosY:Number = Math.cos( angleY );
var sinY:Number = Math.sin( angleY );
var x1:Number = x * cosY - z * sinY;
var z1:Number = z * cosY + x * sinY;
x = x1;
z = z1;
}
public function rotateZ( angleZ:Number ):void {
var cosZ:Number = Math.cos( angleZ );
var sinZ:Number = Math.sin( angleZ );
var x1:Number = x * cosZ - y * sinZ;
var y1:Number = y * cosZ + x * sinZ;
x = x1;
y = y1;
}
}