vrshoot

annotate libs/vmath/ray.cc @ 2:334d17aed7de

visual studio project files
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 18:36:38 +0200
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nuclear@0 1 #include "ray.h"
nuclear@0 2 #include "vector.h"
nuclear@0 3
nuclear@0 4 scalar_t Ray::env_ior = 1.0;
nuclear@0 5
nuclear@0 6 Ray::Ray()
nuclear@0 7 {
nuclear@0 8 ior = env_ior;
nuclear@0 9 energy = 1.0;
nuclear@0 10 time = 0;
nuclear@0 11 iter = 0;
nuclear@0 12 }
nuclear@0 13
nuclear@0 14 Ray::Ray(const Vector3 &origin, const Vector3 &dir)
nuclear@0 15 {
nuclear@0 16 this->origin = origin;
nuclear@0 17 this->dir = dir;
nuclear@0 18 ior = env_ior;
nuclear@0 19 energy = 1.0;
nuclear@0 20 time = 0;
nuclear@0 21 iter = 0;
nuclear@0 22 }
nuclear@0 23
nuclear@0 24 void Ray::transform(const Matrix4x4 &xform)
nuclear@0 25 {
nuclear@0 26 Matrix4x4 upper = xform;
nuclear@0 27 upper[0][3] = upper[1][3] = upper[2][3] = upper[3][0] = upper[3][1] = upper[3][2] = 0.0;
nuclear@0 28 upper[3][3] = 1.0;
nuclear@0 29
nuclear@0 30 dir.transform(upper);
nuclear@0 31 origin.transform(xform);
nuclear@0 32 }
nuclear@0 33
nuclear@0 34 Ray Ray::transformed(const Matrix4x4 &xform) const
nuclear@0 35 {
nuclear@0 36 Ray foo = *this;
nuclear@0 37 foo.transform(xform);
nuclear@0 38 return foo;
nuclear@0 39 }
nuclear@0 40
nuclear@0 41 void Ray::enter(scalar_t new_ior)
nuclear@0 42 {
nuclear@0 43 ior = new_ior;
nuclear@0 44 }
nuclear@0 45
nuclear@0 46 void Ray::leave()
nuclear@0 47 {
nuclear@0 48 }
nuclear@0 49
nuclear@0 50 scalar_t Ray::calc_ior(bool entering, scalar_t mat_ior) const
nuclear@0 51 {
nuclear@0 52 scalar_t from_ior = this->ior;
nuclear@0 53
nuclear@0 54 if(entering) {
nuclear@0 55 return from_ior / mat_ior;
nuclear@0 56 }
nuclear@0 57
nuclear@0 58 Ray tmp = *this;
nuclear@0 59 tmp.leave();
nuclear@0 60 return from_ior / tmp.ior;
nuclear@0 61 }