A Paste by Anonymous

1

// fragment.glsl::Fig. 1 // // see: uv_camera_setup.gif varying vec3 look_at; uniform vec3 eye; uniform vec3 light; uniform vec3 bnd_min; uniform vec3 bnd_max; uniform vec3 p_vis; uniform vec3 m_vis; uniform int inside_box; void get_trace_line(inout vec3 start, inout vec3 end) {     // if inside box, eye is the start position, otherwise, start at edge of box     if(1 == inside_box)     {         start = eye;     }     else     {         if(0.5 < p_vis.x)         {                  }         else         {                  }     } } void main() {     // divide the mean side length by 100     float march_len = 0.003333333333333333 * (abs(bnd_max.x - bnd_min.x) + abs(bnd_max.y - bnd_min.y) + abs(bnd_max.z - bnd_min.z));     vec3 march_step = normalize(look_at) * march_len;     vec3 start, end;     get_trace_line(start, end);          gl_FragColor.a = 1.0;     }