2 #include <msp/strings/format.h>
6 #include "programdata.h"
19 spot_cutoff(Geometry::Angle<float>::straight())
26 void Light::update_matrix()
29 if(20*abs(direction.z)>abs(direction.x)+abs(direction.y))
33 Vector3 right_dir = normalize(cross(direction, up_dir));
36 columns[0] = compose(right_dir, 0.0f);
37 columns[1] = compose(cross(right_dir, direction), 0.0f);
38 columns[2] = compose(-direction, 0.0f);
39 columns[3] = position;
40 matrix = Matrix::from_columns(columns);
43 void Light::set_color(const Color &c)
48 void Light::set_transmittance(const Color &t)
53 void Light::set_matrix(const Matrix &m)
55 Placeable::set_matrix(m);
56 position = matrix.column(3);
57 spot_dir = normalize(-matrix.column(2).slice<3>(0));
58 direction = (position.w ? spot_dir : normalize(-position.slice<3>(0)));
62 void Light::set_position(const Vector4 &p)
66 direction = normalize(-position.slice<3>(0));
70 void Light::set_spot_direction(const Vector3 &d)
72 spot_dir = normalize(d);
78 void Light::set_spot_exponent(float e)
81 throw invalid_argument("Light::set_spot_exponent");
86 void Light::set_spot_cutoff(const Geometry::Angle<float> &c)
88 if(c<Geometry::Angle<float>::zero() || (c>Geometry::Angle<float>::right() && c!=Geometry::Angle<float>::straight()))
89 throw invalid_argument("Light::set_spot_cutoff");
94 void Light::disable_spot_cutoff()
96 set_spot_cutoff(Geometry::Angle<float>::straight());
99 void Light::set_attenuation(float c, float l, float q)
106 void Light::update_shader_data(ProgramData &shdata, const Matrix &view_matrix, unsigned i) const
108 string base = format("light_sources[%d]", i);
109 shdata.uniform(base+".position", view_matrix*position);
110 shdata.uniform(base+".color", color.r*transmittance.r, color.g*transmittance.g, color.b*transmittance.b);
114 Light::Loader::Loader(Light &l):
115 DataFile::ObjectLoader<Light>(l)
117 add("attenuation", &Loader::attenuation);
118 add("color", &Loader::color);
119 add("position", &Loader::position);
120 add("spot_direction", &Loader::spot_direction);
121 add("spot_exponent", &Loader::spot_exponent);
122 add("spot_cutoff", &Loader::spot_cutoff);
125 add("diffuse", &Loader::color);
129 void Light::Loader::attenuation(float c, float l, float q)
131 obj.set_attenuation(c, l, q);
134 void Light::Loader::color(float r, float g, float b)
136 obj.set_color(Color(r, g, b));
139 void Light::Loader::position(float x, float y, float z, float w)
141 obj.set_position(Vector4(x, y, z, w));
144 void Light::Loader::spot_direction(float x, float y, float z)
146 obj.set_spot_direction(Vector3(x, y, z));
149 void Light::Loader::spot_exponent(float e)
151 obj.set_spot_exponent(e);
154 void Light::Loader::spot_cutoff(float c)
156 obj.set_spot_cutoff(Geometry::Angle<float>::from_degrees(c));