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Hello folks, i'm a R beginner and i want to put in a same plot both contour lines and persp plot. For example, fn<-function(x,y){sin(x)+2*y} #this looks like a corrugated tin roof x<-seq(from=1,to=100,by=1) #generates a list of x values to sample y<-seq(from=1,to=100,by=1) #generates a list of y values to sample z<-outer(x,y,FUN=fn) #applies the funct. across the combos of x

...xample programs from opengles programming guide 2.0 for opengles 3.0 and got follwing error. I build mesa while building wayland and it also have dri3 but it doenot loads it. Attaching the debug trace. What is the issue here and if follow exact intructions from https://github.com/danginsburg/opengles3-book/ then it says to use Powervr sdk which also results in similar error but with mesa egl following is the trace. libEGL debug: Native platform type: x11 (autodetected) libEGL debug: EGL search path is /home/rnandan/install/lib/egl libEGL debug: added egl_dri2 to module array libEGL debug: DRI...