1.1 --- a/src/renderer.cc	Sun Dec 28 21:48:15 2014 +0200
     1.2 +++ b/src/renderer.cc	Mon Dec 29 05:41:36 2014 +0200
     1.3 @@ -1,3 +1,4 @@
     1.4 +#include <math.h>
     1.5  #include "renderer.h"
     1.6  
     1.7  Renderer::Renderer()
     1.8 @@ -5,6 +6,15 @@
     1.9  	vol = 0;
    1.10  	view_width = 512;
    1.11  	view_height = 512;
    1.12 +
    1.13 +	for(int i=0; i<3; i++) {
    1.14 +		xfer[i].set_point(0, 0);
    1.15 +		xfer[i].set_point(1, 1);
    1.16 +	}
    1.17 +
    1.18 +	for(int i=0; i<MAX_CLIP_PLANES; i++) {
    1.19 +		disable_clipping_plane(i);
    1.20 +	}
    1.21  }
    1.22  
    1.23  Renderer::~Renderer()
    1.24 @@ -31,6 +41,37 @@
    1.25  	return vol;
    1.26  }
    1.27  
    1.28 +Curve &Renderer::transfer_curve(int color)
    1.29 +{
    1.30 +	return xfer[color];
    1.31 +}
    1.32 +
    1.33 +const Curve &Renderer::transfer_curve(int color) const
    1.34 +{
    1.35 +	return xfer[color];
    1.36 +}
    1.37 +
    1.38 +void Renderer::set_clipping_plane(int idx, float nx, float ny, float nz, float dist)
    1.39 +{
    1.40 +	float len = sqrt(nx * nx + ny * ny + nz * nz);
    1.41 +	if(len != 0.0) {
    1.42 +		nx /= len;
    1.43 +		ny /= len;
    1.44 +		nz /= len;
    1.45 +	}
    1.46 +	clip_plane[idx][0] = nx;
    1.47 +	clip_plane[idx][1] = ny;
    1.48 +	clip_plane[idx][2] = nz;
    1.49 +	clip_plane[idx][3] = dist;
    1.50 +}
    1.51 +
    1.52 +void Renderer::disable_clipping_plane(int idx)
    1.53 +{
    1.54 +	clip_plane[idx][0] = clip_plane[idx][2] = 0;
    1.55 +	clip_plane[idx][1] = 1;
    1.56 +	clip_plane[idx][3] = -1;
    1.57 +}
    1.58 +
    1.59  void Renderer::reshape(int x, int y)
    1.60  {
    1.61  	view_width = x;