---

FirstHitTRI Class Reference

#include <ray.h>

Inheritance diagram for FirstHitTRI:

List of all members.

Public Methods
	FirstHitTRI ()
bool	SetTreshold (int treshold)
bool	CastNext ()
Protected Methods
float	GetDensity (VECTOR pos)
Protected Attributes
int	m_treshold

---

Constructor & Destructor Documentation

FirstHitTRI::FirstHitTRI (    )  [inline]

Definition at line 92 of file ray.h. {m_treshold = 0.0;};

---

Member Function Documentation

bool FirstHitTRI::CastNext (    )  [virtual]

Reimplemented from Trilinear. Reimplemented in MaxIntensityTRI, XRayTRI, and AverageTRI. Definition at line 361 of file ray.cpp. References Trilinear::CalcAlphaTrilinear(), Trilinear::CalcColorTrilinear(), GetDensity(), VECTOR::length(), Trilinear::Lighting(), 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, m_treshold, Ray::mx, Ray::my, Ray::mz, VECTOR::x, VECTOR::y, and VECTOR::z. { if(m_data == NULL) return false; if(m_tf == NULL) return false; int step_count = 0; VECTOR distancetomidpoint = VECTOR(mx/2.0f,my/2.0f,mz/2.0f)-m_currentpos; int steps = (int)((distancetomidpoint.length() + m_radius)/m_steplength); bool first = true; do { 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)) { if(first) { m_startpoint = VECTOR(m_currentpos.x,m_currentpos.y,m_currentpos.z); first = false; } float d = GetDensity(m_currentpos); if(d > (float)m_treshold) { Color help_color = CalcColorTrilinear(m_currentpos); float help_alpha = CalcAlphaTrilinear(m_currentpos); // lightning: help_color = Lighting(help_color); // calculate new currentcolor: m_currentcolor = help_color; // calculate new alphavalue m_alpha = help_alpha; break; } // calculate new position } m_currentpos += m_steplength*m_direction; step_count++; }while(step_count <= steps); if(m_alpha < 1.0 ) { m_currentcolor += m_backgroundcolor*(1.0f-m_alpha); } return true; }

float FirstHitTRI::GetDensity (  VECTOR    pos )  [protected]

Definition at line 334 of file ray.cpp. References Data::GetDensity(), Ray::m_data, VECTOR::x, VECTOR::y, and VECTOR::z. Referenced by AverageTRI::CastNext(), XRayTRI::CastNext(), MaxIntensityTRI::CastNext(), and CastNext(). { int dat000 = m_data->GetDensity(floorf(pos.x),floorf(pos.y),floorf(pos.z)); int dat001 = m_data->GetDensity(floorf(pos.x),floorf(pos.y),ceilf(pos.z)); int dat010 = m_data->GetDensity(floorf(pos.x),ceilf(pos.y),floorf(pos.z)); int dat011 = m_data->GetDensity(floorf(pos.x),ceilf(pos.y),ceilf(pos.z)); int dat100 = m_data->GetDensity(ceilf(pos.x),floorf(pos.y),floorf(pos.z)); int dat101 = m_data->GetDensity(ceilf(pos.x),floorf(pos.y),ceilf(pos.z)); int dat110 = m_data->GetDensity(ceilf(pos.x),ceilf(pos.y),floorf(pos.z)); int dat111 = m_data->GetDensity(ceilf(pos.x),ceilf(pos.y),ceilf(pos.z)); float difX = abs(pos.x - floorf(pos.x)); float difY = abs(pos.y - floorf(pos.y)); float difZ = abs(pos.z - floorf(pos.z)); int datA = dat000*difX + dat100*abs(1.0f-difX); int datB = dat010*difX + dat110*abs(1.0f-difX); int datC = dat011*difX + dat111*abs(1.0f-difX); int datD = dat001*difX + dat101*abs(1.0f-difX); int datE = datA*difZ + datD*abs(1.0f-difZ); int datF = datB*difZ + datC*abs(1.0f-difZ); int dat = datE*difY + datF*abs(1.0f-difY); return dat; }

bool FirstHitTRI::SetTreshold (  int    treshold )  [inline]

Definition at line 93 of file ray.h. { m_treshold = treshold; return true;};

---

Member Data Documentation

int FirstHitTRI::m_treshold [protected]

Definition at line 89 of file ray.h. Referenced by CastNext().

---

The documentation for this class was generated from the following files:

• ray.h
• ray.cpp

---