#include <ray.h>
Inheritance diagram for XRayNN:
Public Methods | |
| XRayNN () | |
| ~XRayNN () | |
| bool | CastNext () |
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Definition at line 120 of file ray.h.
00120 {};
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Definition at line 121 of file ray.h.
00121 {};
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berechnet den farbwert eines Strahls indem er das Volumen an diskreten Punkten abtastet, dort einen Dichtewert erhält, und diesen dichtewert in eine Farbe umwandelt und dann im Volumen vorwärts geht bis das Ende des Volumens erreicht ist oder die Opazität eins ist Reimplemented from Ray. Definition at line 526 of file ray.cpp. References Data::GetDensity(), VECTOR::length(), Ray::m_alpha, Ray::m_currentcolor, Ray::m_currentpos, Ray::m_data, Ray::m_direction, Ray::m_maxDens, Ray::m_minDens, 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.
00526 {
00527 if(m_data == NULL) return false;
00528 if(m_tf == NULL) return false;
00529 int density = 0;
00530 int step_count = 0;
00531 bool first = true;
00532 int counter = 0;
00533
00534 VECTOR distancetomidpoint = VECTOR(mx/2.0f,my/2.0f,mz/2.0f) - m_currentpos;
00535 int steps = (int)((distancetomidpoint.length() + m_radius)/m_steplength);
00536 do {
00537
00538 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)) {
00539 if(first) {
00540 m_startpoint = VECTOR(m_currentpos.x,m_currentpos.y,m_currentpos.z);
00541 first = false;
00542 }
00543 int d = m_data->GetDensity((int)ROUND(m_currentpos.x),(int)ROUND(m_currentpos.y),(int)ROUND(m_currentpos.z));
00544 density += d;
00545 counter++;
00546 }
00547 // calculate new position
00548 m_currentpos += m_steplength*m_direction;
00549
00550 step_count++;
00551 }while(step_count <= steps);
00552
00553
00554 float colormodifyer = (float) ((m_maxDens - m_minDens - 1) / 255);
00555
00556 if (colormodifyer > 0)
00557 colormodifyer = 1.0f / colormodifyer;
00558
00559 if (counter <= 0)
00560 m_currentcolor = Color(0, 0, 0);
00561 else {
00562 unsigned char col = (unsigned char) ((density / counter) * colormodifyer);
00563 m_currentcolor = Color(col, col, col);
00564 }
00565
00566 m_alpha = 1.0f;
00567
00568 return true;
00569 }
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1.3-rc2