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Socoder -> Blitz -> Moving an entity in a wavy pattern |
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| Mon, 07 Jul 2008, 18:56 | |
Orion Pax
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I need to make some entities in blitz move but in a wavy pattern. I need it to go straight but sway left and right. Right now I am just counting in a loop and reversing the turning direction after so many loops. I am sure there is a better way but I dont know. 
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| Mon, 07 Jul 2008, 19:06 | |
Scherererer
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use a sin wave!
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| Mon, 07 Jul 2008, 19:27 | |
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Orion Pax
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I figured that was it but I have no idea how to do a sin wave. I guess I do a sin on my entities yaw value?
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| Mon, 07 Jul 2008, 19:44 | |
Scherererer
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here's a simple pendulum-type-motion as an example if you get stuck  |edit| Yeah you could set the yaw value to the output of the sin function. notice in my example i multiplied the sin value by 150: that's because it only goes from 0.0000-1.0000, so if you want a more intense change, you have to add a larger multiplier. so, if you want to move in a variance of 15 degrees, you'd set it to 15*Sin(theta#) |edit| -=-=- YouTube Twitter Computer Science Series: Logic (pt1) (part 2) (part 3) 2's Complement Mathematics: Basic Differential Calculus
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| Mon, 07 Jul 2008, 20:07 | |
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Orion Pax
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Ok I do this but it goes back and forth much to the right. And none to the left.
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| Mon, 07 Jul 2008, 23:04 | |
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Scherererer
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aha! i didn't figure it out until i remembered calculus: in your scenario, you have the sine curve acting as the velocity graph, in mine its the position graph. What that means is, that your object's velocity is going from 1 to -1, whereas my position is going from -1 to 1. Therefore, your object's position is the integral of the sin function, being a cosine function. Now, the function with the integral that is a sine graph, is, of course, cosine. long story short, change Sin to Cos -=-=- YouTube Twitter Computer Science Series: Logic (pt1) (part 2) (part 3) 2's Complement Mathematics: Basic Differential Calculus
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