JS1k 2015 - 2342 - Details - A hyped JavaScript golfing competition

Author:

Fredrik Karlsson

Twitter:

GitHub:

Facebook:

Google+:

Reddit:

/r/

Pouet:

Website:

lab.kaiba.se

Compo:

canvas

Demo link:

https://js1k.com/2015-hypetrain/demo/2342

Shortlink:

https://js1k.com/2342

Blog post:

please update here!

Bytes:

1021

Chars:

1021

Submission

for(_='c.Z0,YRect(YYo,XZfillWWStyle="hsla("+g+",99%,"+-80*T+"%,"+I+")"V;V;WXUMath.Ot*Osin(6.3/r*iNo+g*NLP[i].K=KJy,wJzH,vJG,uJF(u*EP[j].D-DC),B[s++]A,l=OsqrtEu+v*v+w*wB@)%rFxCxGyCHCz@  SA/l,&&(=T*-j=(i+1+r/2*f+o/4=1a.widthfor(i=r;i--;);1;g==0)*+=9*K=l,function(){,K200],f=600/(-m.zBZ	eTo(m.x,m.yB,!(i%2)&0>=TV,W())u/v/w/Orandom())%r,m=P[j	linPA={x:g-R,y:-LBz:-3*L+1.6Be:Yf:N+1.6T,d:-NT,b:Ya:Yc:0},R=-R,t/t b=(KeCeu+(KfCfv+(KdCdw,T=-(l-SA+b)/40b+ua+vc+w,Dbu,Dav,Dcw k=un=vQ=w2 T=(v*Q-w*nKx-EQ-w*kKy+En-v*kKzFxGH@ZbeginPath(Bm=P[i	mov132Tr;M=I;o;b.onclick=M=!M};h=a.height*=o/;=o;setInterval(if(M){s;P=[];S=[];r|9*+3;T=.3+/2;R=g*+30;t=r%2*/2+1;,;r=s;M=s2=l}for(q5;q--;){KbJc=sa/o,2,;Ke+Jbf+Jad+Jcxeyfzd,<KyTJa/2fJa=wFeGd@Keudvy=B-<Kz&&0<KdIJdz=-)}T=-199;ZclearXh)Uh)Uo/4)R=T/l/-2,Zstroke()/=l;I>I?I+=.1:1},15);';g=/[^!-?IMP-T[-}]/.exec(_);)with(_.split(g))_=join(shift());eval(_)

Description

Physics Hype - 3D physics engine - click or reload to drop another spinning object - full screen for best effect. Update: Could optimize and adjust the orginial code to gain ~20 bytes for implementing some new shapes (cuboids & cones). The engine intrinsically accounts for gyroscopic effects, etc. Dropped object bounces against ground and screen. Compressed below 1kB with RegPack v3.0.2 by Siorki. Contact: fredrik.karlsson@kaiba.se

Base64 encoded

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

Original source

p=0; M=B=1; W=1200;
	  b.onclick=function(){M=!M};    
	  
	  H = a.height *= W/a.width;
	  a.width = W;
  
	  setInterval(function() {
	 
	  if (M) {					//Create spinning object
	  	  s=0;P=[];S=[];
	  	  C=200;
		  p = 0|Math.random()*9+3;
		  T = .3+Math.random()/2;
		  R = C*Math.random()+30;
		  t = Math.random()*(p%2)/2+1;
		  for (i=p; i--;) {
		  	P[s++] = {x:C-R, y:(-W+C*t*Math.sin(6.3/p*i)), z:(-3*W+C*t*Math.sin(6.3/p*i+1.6)), v:0, u:t*Math.sin(6.3/p*i+1.6)*T, q:-t*Math.sin(6.3/p*i)*T, f:0, g:0, h:0};R=-R;t=1/t;
		  	P[s++] = {x:C-R, y:(-W+C*t*Math.sin(6.3/p*i)), z:(-3*W+C*t*Math.sin(6.3/p*i+1.6)), v:0, u:t*Math.sin(6.3/p*i+1.6)*T, q:-t*Math.sin(6.3/p*i)*T, f:0, g:0, h:0};R=-R;t=1/t;
		  }

		  p=s;M=s=0;		  
		  for (i=p; i--;) {
				j = (i+1)%p;
				u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
		  		S[s++] = l;
		  		
		  		j = (i+2)%p;
				u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
		  		S[s++] = l;
	
		  		j = (i+1+p/2)%p;
				u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
		  		S[s++] = l;
		  }
	  }


      for (q=15; q--;) {
		  for (i=p; i--;) {		//3D PHYSICS
				P[i].f=P[i].h=s=0;
				P[i].g=1/W;		//External forces (gravity)
		  }
		  
		  for (i=p; i--;) {
		  		j = (i+1)%p;
		  	  	u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
				u = u/l; v = v/l; w = w/l;
				
				b =  (P[i].v-P[j].v)*u + (P[i].u-P[j].u)*v + (P[i].q-P[j].q)*w;
				
				T = -(l-S[s++]+b)/40;	//Internal forces
		  	    
		  	    P[i].f += T*u;
				P[i].g += T*v;
				P[i].h += T*w;
				
				P[j].f -= T*u;
				P[j].g -= T*v;
				P[j].h -= T*w;
				
				j = (i+2)%p;
				u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
				u = u/l; v = v/l; w = w/l;
				
				b =  (P[i].v-P[j].v)*u + (P[i].u-P[j].u)*v + (P[i].q-P[j].q)*w;
				
				T = -(l-S[s++]+b)/40;	//Internal forces	
		  	    
		  	    P[i].f += T*u;			//Newtons 3rd law
				P[i].g += T*v;
				P[i].h += T*w;
				
				P[j].f -= T*u;
				P[j].g -= T*v;
				P[j].h -= T*w;
				
				j = (i+1+p/2)%p;
				u = P[i].x - P[j].x;
				v = P[i].y - P[j].y;
				w = P[i].z - P[j].z;
				l = Math.sqrt(u*u + v*v + w*w);
				u = u/l; v = v/l; w = w/l;
				
				b =  (P[i].v-P[j].v)*u + (P[i].u-P[j].u)*v + (P[i].q-P[j].q)*w;
				
				T = -(l-S[s++]+b)/40;	//Internal forces  	  
		  	    
		  	    P[i].f += T*u;			//Newtons 3rd law
				P[i].g += T*v;
				P[i].h += T*w;
				
				P[j].f -= T*u;
				P[j].g -= T*v;
				P[j].h -= T*w;
		  }
		  
		  for (i=p; i--;) {				//Newtons 2nd law
				P[i].v += P[i].f;		//Update velocity
				P[i].u += P[i].g;
				P[i].q += P[i].h;
	
				P[i].x += P[i].v*9;		//Update position
				P[i].y += P[i].u*9;
				P[i].z += P[i].q*9;
							
				if (P[i].y>200) {		//Adjust for external forces (collisions)
				  T = P[i].g/2;
				  P[i].u = P[i].g = w = 0;
				  u = P[i].v;
				  v = P[i].q;
				  l = Math.sqrt(u*u + v*v + w*w);
				  u = u/l; v = v/l; w = w/l;
				  
				    P[i].v -= T*u;
				    P[i].q -= T*v;
				  
				  	P[i].y = 200;
				}

				if (P[i].z>-200) {
    			  if (P[i].q>0) {B=P[i].q = 0; P[i].z = -200};
    			}	
    						
		  }
		}
		
		T=-1;		
		C=99;
		c.clearRect(0,0,W,H);
		c.fillStyle="hsla("+C+",99%," + -80*T +"%,"+B+")";
      	c.fillRect(0,0,W,H);
      	C=200;
		c.fillStyle="hsla("+C+",99%," + -80*T +"%,"+B+")";
      	c.fillRect(0,0,W,W/4);
		C=R;
		for (i=p; i--;) {		//3D GRAPHICS	
	 		j = (i+1)%p;
	 		u = P[i].x - P[j].x;
			v = P[i].y - P[j].y;
			w = P[i].z - P[j].z;
			l = Math.sqrt(u*u + v*v + w*w);
			U = u/l; V = v/l; Q = w/l; 
				

		  	j = (i+2)%p;
	 		u = P[i].x - P[j].x;
			v = P[i].y - P[j].y;
			w = P[i].z - P[j].z;
			l = Math.sqrt(u*u + v*v + w*w);
			u = u/l; v = v/l; w = w/l;

		  	T = (v*Q-w*V)*P[i].x - (u*Q-w*U)*P[i].y + (u*V-v*U)*P[i].z;
	 		
	 		u = P[i].x;
			v = P[i].y;
			w = P[i].z;
			l = Math.sqrt(u*u + v*v + w*w);
			
		  	c.beginPath();
	  		m=P[i]; f = 3*200/(200-m.z);
		  	c.moveTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+1)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+3)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+2)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	T=T/l/-2;
		 	if ((!(i%2))&(T<=0)) {
			  	c.fillStyle="hsla("+C+",99%," + -80*T +"%,"+B+")";
			  	c.fill();
		  	}
		  	c.stroke();
		  	
		}

		for (i=p; i--;) {			
	 		j = (i+1)%p;
	 		u = P[i].x - P[j].x;
			v = P[i].y - P[j].y;
			w = P[i].z - P[j].z;
			l = Math.sqrt(u*u + v*v + w*w);
			U = u/l; V = v/l; Q = w/l; 
				
		  	j = (i+2)%p;
	 		u = P[i].x - P[j].x;
			v = P[i].y - P[j].y;
			w = P[i].z - P[j].z;
			l = Math.sqrt(u*u + v*v + w*w);
			u = u/l; v = v/l; w = w/l;

		  	T = (v*Q-w*V)*P[i].x - (u*Q-w*U)*P[i].y + (u*V-v*U)*P[i].z;
	 		
	 		u = P[i].x;
			v = P[i].y;
			w = P[i].z;
			l = Math.sqrt(u*u + v*v + w*w);
			
		  	c.beginPath();
	  		m=P[i]; f = 3*200/(200-m.z);
		  	c.moveTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+1)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+3)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	j = (i+2)%p;
		  	m=P[j]; f = 3*200/(200-m.z);
		  	c.lineTo( m.x*f+W/4, m.y*f + W/4 );
		  	T=T/l;
		  	if ((!(i%2))&(T<=0)) {
			  	c.fillStyle="hsla("+C+",99%," + -80*T +"%,"+B+")";
			  	c.fill();
		  	}
		}
      	
      	B=(B<1)?B+=.1:1;	//Flash effect
	  },15);

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Physics Hype 3D