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random movement on grid with specific pixels each movement
So i have an expression. With this my blocks are moving randomly on the grid. Perfect…However: I want to move a block 200 pixels each time, instead 200 pixels one time and the other time 200*5 pixels
So i can lower my grid number to 2, but then i need a new origin on every new layer with a distribution of 200 each
or
I need an expression to move each block just 200 in the movement.See below what I have
Can anybody help? Thanks!
Adobe After Effects 8.0 Keyframe DataUnits Per Second 25
Source Width 200
Source Height 200
Source Pixel Aspect Ratio 1
Comp Pixel Aspect Ratio 1Transform Position
Frame X pixels Y pixels Z pixels
15.5 0 0Expression Data
origin = [0,0]+random(200,200); //upper left hand corner of grid
dimX = 5; //number of columns
dimY = 5; //number of rows
gap = 200; // distance between cells (pixels)
gridRate = 300; //speed (pixels per second)
holdTime = 4; //(seconds)end = 0;
j = 0;while (time >= end){
seedRandom(j,true);
startX = Math.floor(random(dimX))*gap + origin[0];
startY = Math.floor(random(dimY))*gap + origin[1];
j +=1;
seedRandom(j,true)
start = end;
endX = Math.floor(random(dimX))*gap + origin[0];
endY = Math.floor(random(dimY))*gap + origin[1];
deltaX = Math.abs(endX - startX);
deltaY = Math.abs(endY - startY);end += (deltaX + deltaY)/gridRate + 2*holdTime;
}p1 = start + deltaX/gridRate;
p2 = p1 + holdTime;
p3 = p2 + deltaY/gridRate;if (time < p1){
ease(time,start,p1,[startX,startY],[endX,startY])
}else if (time < p2){
[endX,startY]
}else if (time < p3){
ease(time,p2,p3,[endX,startY],[endX,endY])
}else{
[endX,endY]
}
End of Expression DataEnd of Keyframe Data
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1 Reply
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You’ll need to generate an array of coordinates first, as every subsequent coordinate depends on the previous location.
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