#include <ray.h>
Inheritance diagram for MaxIntensityTRI:
Public Methods | |
| MaxIntensityTRI () | |
| ~MaxIntensityTRI () | |
| bool | CastNext () |
|
|
Definition at line 113 of file ray.h.
00113 {};
|
|
|
Definition at line 114 of file ray.h.
00114 {};
|
|
|
berechnet den farbwert eines Strahls indem er das Volumen an diskreten Punkten abtastet, dort einen Dichtewert erhält und den Dichtewert sucht, der die größte Opazität liefert. Für diesen Dichtewert wird die Farbe des Strahls berechnet Reimplemented from FirstHitTRI. Definition at line 485 of file ray.cpp. References FirstHitTRI::GetDensity(), Transfunc::GetDensityColor(), Transfunc::GetOpacity(), VECTOR::length(), Ray::m_alpha, Ray::m_backgroundcolor, Ray::m_currentcolor, Ray::m_currentpos, Ray::m_data, Ray::m_direction, Ray::m_radius, Ray::m_startpoint, Ray::m_steplength, Ray::m_tf, Ray::mx, Ray::my, Ray::mz, VECTOR::x, VECTOR::y, and VECTOR::z.
00485 {
00486 if(m_data == NULL) return false;
00487 if(m_tf == NULL) return false;
00488 float maxintensity = 0.0f;
00489 int maxdens = 0;
00490 int step_count = 0;
00491 VECTOR distancetomidpoint = VECTOR(mx/2.0f,my/2.0f,mz/2.0f)-m_currentpos;
00492 int steps = (int)((distancetomidpoint.length() + m_radius)/m_steplength);
00493 bool first = true;
00494 do {
00495
00496 if((m_currentpos.x >= 0.0)&&(m_currentpos.y >= 0.0)&&(m_currentpos.z >= 0.0)&&(m_currentpos.x < mx)&&(m_currentpos.y < my)&&(m_currentpos.z < mz)) {
00497 if(first) {
00498 m_startpoint = VECTOR(m_currentpos.x,m_currentpos.y,m_currentpos.z);
00499 first = false;
00500 }
00501 float d = GetDensity(m_currentpos);
00502 float intens = m_tf->GetOpacity((int)d);
00503 if(intens > maxintensity) {
00504 maxintensity = intens;
00505 maxdens = d;
00506 }
00507 // calculate new position
00508 }
00509 m_currentpos += m_steplength*m_direction;
00510 step_count++;
00511 }while(step_count <= steps);
00512
00513 m_currentcolor = m_tf->GetDensityColor(maxdens);
00514 m_alpha = maxintensity;
00515 if(maxdens == 0) {
00516 m_currentcolor = Color(0,0,0);
00517 m_alpha = 1.0;
00518 }
00519 if(m_alpha < 1.0 ) {
00520 m_currentcolor += m_backgroundcolor*(1.0f-m_alpha);
00521 }
00522 return true;
00523 }
|
1.3-rc2