#include <ray.h>
Inheritance diagram for MaxIntensityNN:
Public Methods | |
| MaxIntensityNN () | |
| ~MaxIntensityNN () | |
| bool | CastNext () |
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Definition at line 104 of file ray.h.
00104 {};
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Definition at line 105 of file ray.h.
00105 {};
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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 Ray. Definition at line 441 of file ray.cpp. References Data::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_light, Ray::m_radius, Ray::m_startpoint, Ray::m_steplength, Ray::m_tf, Ray::mx, Ray::my, Ray::mz, ROUND, VECTOR::x, VECTOR::y, and VECTOR::z.
00441 {
00442 if(m_data == NULL) return false;
00443 if(m_tf == NULL) return false;
00444 int maxdens = 0;
00445 float maxintens = 0.0f;
00446 int step_count = 0;
00447 bool first = true;
00448 VECTOR distancetomidpoint = VECTOR(mx/2.0f,my/2.0f,mz/2.0f)-m_currentpos;
00449 int steps = (int)((distancetomidpoint.length() + m_radius)/m_steplength);
00450 do {
00451
00452 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)) {
00453 if(first) {
00454 m_startpoint = VECTOR(m_currentpos.x,m_currentpos.y,m_currentpos.z);
00455 first = false;
00456 }
00457 int d = m_data->GetDensity((int)ROUND(m_currentpos.x),(int)ROUND(m_currentpos.y),(int)ROUND(m_currentpos.z));
00458 float intens = m_tf->GetOpacity(d);
00459 if(intens > maxintens) {
00460 maxintens = intens;
00461 maxdens = d;
00462 }
00463 }
00464 // calculate new position
00465 m_currentpos += m_steplength*m_direction;
00466
00467 step_count++;
00468 }while(step_count <= steps);
00469 m_light = false;
00470 m_currentcolor = m_tf->GetDensityColor(maxdens);
00471 m_alpha = maxintens;
00472 if(maxdens == 0) {
00473 m_currentcolor = Color(0,0,0);
00474 m_alpha = 1.0;
00475 }
00476 if(m_alpha < 1.0 ) m_currentcolor += m_backgroundcolor*(1.0 - m_alpha);
00477 return true;
00478 }
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1.3-rc2