November 13, 2007

Javascript Fun

Computer Science

Just came across a very neat Javascript trick. 1. Go to Google Images (http://images.google.com) 2. Search for “Apple” or anything that will give you results 3. Copy and Paste the following into the URL bar of your browser and hit Enter: javascript:R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI= document.images; DIL=DI.length; function A(){for(i=0; i<DIL; i++){DIS=DI[ i ].style; DIS.position='absolute'; DIS.left=Math.sin(R*x1+i*x2+x3)*x4+x5; DIS.top=Math.cos(R*y1+i*y2+y3)*y4+y5}R++}setInterval('A()',5 ); void(0)

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November 9, 2007

Left Brain or Right Brain

Computer Science,Psychology

Today I came across a very interesting illusion: If you see the above person turning clockwise, that means you are left-brain oriented and good at analytical endeavors (math, science, logic, etc) If you see the above person turning counter-clockwise, that means you are right-brain oriented and good at artistical endeavors (arts, music, poetry, etc)   Thinking about being analytical and artistic, it suddenly becomes clear to me why good programmers are so rare.   I think everyone will agree that computer programming […]

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November 2, 2007

Robocode – Predictive Targeting Implementation

Computer Science

When I was building my bot, the most interesting aspect is implementing predictive targeting.   To tackle this problem, I first define two aspects I can use for prediction:  Velocity Change and Angular Change per turn. Here is how I capture these two parameters: angularChange = (targetHeading – lastTargetHeading) / turnsElapsed; velocityChange = (targetVelocity – lastTargetVelocity) / turnsElapsed; After capturing these two values, I can calculate an angle in addition to the current bearing such that the bullet shot from that […]

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November 1, 2007

On Robocode & Strategy

Computer Science,Strategy

Days ago I’ve stumpled upon a programming game called Robocode while I was reading up AI.   Basically it is a platform for programming intelligent tanks that fight with each other.  http://robocode.sourceforge.net/ After playing with it for a while, I discover the following to be true for heads-up battles: 1. It is always better to move around, this avoids targets. 2. It is always better to predict the movement of the enemy and shoot accordingly. 3. It is always better to […]

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