VolumeRendering

Integration mit OpenGL

← Numerical Integration | ● | Emission →

We regard the simple case of a linear transfer function, meaning that the over-operator is used together with

  • vertex opacity $1 - e^{-\mu_A \Delta t}$ and a
  • modulation of opacity with the 3D texture.

Vertex color:

glColor4f(0,0,0,1-exp(-muA*dt));
[Get Code]

3D texture modulation:

glEnable(GL_TEXTURE_3D);
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
[Get Code]

Over-operator with OpenGL-blending:

glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
[Get Code]
XRay-Foot


← Numerical Integration | ● | Emission →

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