rayzor
annotate src/light.cc @ 20:6b11a3f8706e
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| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Tue, 15 Apr 2014 01:36:03 +0300 |
| parents | 79609d482762 |
| children |
| rev | line source |
|---|---|
| nuclear@1 | 1 #include "light.h" |
| nuclear@1 | 2 |
| nuclear@1 | 3 Light::Light() |
| nuclear@1 | 4 { |
| nuclear@12 | 5 type = NODE_LIGHT; |
| nuclear@17 | 6 intens = 1.0; |
| nuclear@1 | 7 color.x = color.y = color.z = 1.0; |
| nuclear@1 | 8 atten.x = 1.0; |
| nuclear@1 | 9 atten.y = 0.0; |
| nuclear@1 | 10 atten.z = 0.0; |
| nuclear@1 | 11 } |
| nuclear@1 | 12 |
| nuclear@17 | 13 void Light::set_intensity(float val) |
| nuclear@17 | 14 { |
| nuclear@17 | 15 intens = val; |
| nuclear@17 | 16 } |
| nuclear@17 | 17 |
| nuclear@17 | 18 float Light::get_intensity() const |
| nuclear@17 | 19 { |
| nuclear@17 | 20 return intens; |
| nuclear@17 | 21 } |
| nuclear@17 | 22 |
| nuclear@1 | 23 void Light::set_color(const Vector3 &color) |
| nuclear@1 | 24 { |
| nuclear@1 | 25 this->color = color; |
| nuclear@1 | 26 } |
| nuclear@1 | 27 |
| nuclear@1 | 28 const Vector3 &Light::get_color() const |
| nuclear@1 | 29 { |
| nuclear@1 | 30 return color; |
| nuclear@1 | 31 } |
| nuclear@1 | 32 |
| nuclear@17 | 33 Vector3 Light::get_color(const Vector3 &pt) const |
| nuclear@17 | 34 { |
| nuclear@17 | 35 float d = (get_position() - pt).length(); |
| nuclear@17 | 36 return color * calc_attenuation(d) * intens; |
| nuclear@17 | 37 } |
| nuclear@1 | 38 |
| nuclear@1 | 39 void Light::set_attenuation(const Vector3 &atten) |
| nuclear@1 | 40 { |
| nuclear@1 | 41 this->atten = atten; |
| nuclear@1 | 42 } |
| nuclear@1 | 43 |
| nuclear@1 | 44 const Vector3 &Light::get_attenuation() const |
| nuclear@1 | 45 { |
| nuclear@1 | 46 return atten; |
| nuclear@1 | 47 } |
| nuclear@12 | 48 |
| nuclear@17 | 49 float Light::calc_attenuation(float d) const |
| nuclear@17 | 50 { |
| nuclear@17 | 51 float denom = atten.x + atten.y * d + atten.z * d * d; |
| nuclear@17 | 52 float at = denom == 0.0 ? 1.0 : 1.0 / denom; |
| nuclear@17 | 53 return at > 1.0 ? 1.0 : at; |
| nuclear@17 | 54 } |
| nuclear@17 | 55 |
| nuclear@18 | 56 void Light::draw(bool emph) const |
| nuclear@12 | 57 { |
| nuclear@12 | 58 } |
| nuclear@12 | 59 |
| nuclear@17 | 60 bool Light::intersect(const Ray &ray, RayHit *hit) const |
| nuclear@12 | 61 { |
| nuclear@17 | 62 return false; // TODO |
| nuclear@12 | 63 } |