1.1 --- a/src/volume.cc	Wed Apr 11 01:44:45 2012 +0200
     1.2 +++ b/src/volume.cc	Wed Apr 11 06:08:59 2012 +0300
     1.3 @@ -26,6 +26,19 @@
     1.4  	}
     1.5  }
     1.6  
     1.7 +bool Volume::create(int xsz, int ysz, int zsz, float *data)
     1.8 +{
     1.9 +	if(!tex)
    1.10 +		glGenTextures(1, &tex);
    1.11 +	glBindTexture(GL_TEXTURE_3D, tex);
    1.12 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    1.13 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    1.14 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    1.15 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    1.16 +	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
    1.17 +	glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F_ARB, xsz, ysz, zsz, 0, GL_RGBA, GL_FLOAT, data);
    1.18 +}
    1.19 +
    1.20  bool Volume::load(const char *fname)
    1.21  {
    1.22  	std::list<std::string> slist;
    1.23 @@ -88,14 +101,7 @@
    1.24  	calc_gradients(voxels, sz[0], sz[1], sz[2]);
    1.25  
    1.26  	/* create the volume texture */
    1.27 -	glGenTextures(1, &tex);
    1.28 -	glBindTexture(GL_TEXTURE_3D, tex);
    1.29 -	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    1.30 -	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    1.31 -	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    1.32 -	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    1.33 -	glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
    1.34 -	glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F_ARB, sz[0], sz[1], sz[2], 0, GL_RGBA, GL_FLOAT, voxels);
    1.35 +	create(sz[0], sz[1], sz[2], voxels);
    1.36  
    1.37  	/* ... and destroy our copy */
    1.38  	delete [] voxels;