Jump to content
  • Advertisement


This topic is now archived and is closed to further replies.


cubic interpolation.

This topic is 6454 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I have a cubic interpolation function here: float splineinterp(float number1,float afternumber1, float number2, float afternumber2,float x) { float P=(afternumber2-number2)-(number1-afternumber1); float Q=(number1-afternumber1)-P; float R=(number2-number1); float S=afternumber1; float ret=P*(x*x*x)+Q*(x*x)+(R*x)+S; return ret; } before I was using cosine interpolation, and doing this: int xi=x; float fractionx=x-xi; int yi=y; float fractiony=y-yi; float v1,v2,v3,v4,i1,i2; float ret; v1=smoothnoise(xi, yi); v2=smoothnoise(xi + 1, yi); v3=smoothnoise(xi, yi + 1); v4=smoothnoise(xi + 1, yi + 1); i1=cosinterp(v1,v2,fractiony); i2=cosinterp(v3,v4,fractionx); ret=cosinterp(i1,i2,fractiony); How can I change and use cubic interpolation? My main problem is figuring out what to use for X.

Share this post

Link to post
Share on other sites

  • Advertisement

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!