VolumeRendering

3D Texture Slice

Texture Coordinate Generation | | 3D Texture Objects

Usage Example: Drawing a horizontal slice of a unit volume with the barycenter being the origin of world coordinates (the vertical position of the slice is determined by its height h).

glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glTranslated(0.5,0.5,0.5);
glMatrixMode(GL_MODELVIEW);

glBegin(GL_QUADS);
   x_0=-0.5; y_0=h; z_0=-0.5;
   glTexCoord3f(x_0,y_0,z_0);
   glVertex3d(x_0,y_0,z_0);
   x_1=0.5; y_1=h; z_1=-0.5;
   glTexCoord3f(x_1,y_1,z_1);
   glVertex3d(x_1,y_1,z_1);
   x_2=0.5; y_2=h; z_2=0.5;
   glTexCoord3f(x_2,y_2,z_2);
   glVertex3d(x_2,y_2,z_2);
   x_3=-0.5; y_3=h; z_3=0.5;
   glTexCoord3f(x_3,y_3,z_3);
   glVertex3d(x_3,y_3,z_3);
glEnd();


Texture Coordinate Generation | | 3D Texture Objects

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