+++ /dev/null
-#include <stdexcept>
-#include <msp/gl/extensions/msp_legacy_features.h>
-#include <msp/strings/format.h>
-#include "light.h"
-#include "lightunit.h"
-#include "matrix.h"
-#include "misc.h"
-#include "programdata.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-Light::Light():
- diffuse(1),
- specular(1),
- position(0, 0, 1, 0),
- spot_dir(0, 0, -1),
- spot_exp(0),
- spot_cutoff(Geometry::Angle<float>::straight())
-{
- attenuation[0] = 1;
- attenuation[1] = 0;
- attenuation[2] = 0;
-}
-
-Light::~Light()
-{
- while(LightUnit *unit = LightUnit::find_unit(this))
- unbind_from(unit->get_index());
-}
-
-void Light::update_parameter(int mask, int index) const
-{
- if(index<0)
- {
- LightUnit *unit = LightUnit::find_unit(this);
- if(!unit)
- return;
-
- index = unit->get_index();
- }
-
- GLenum l = GL_LIGHT0+index;
- if(mask&DIFFUSE)
- glLightfv(l, GL_DIFFUSE, &diffuse.r);
- if(mask&SPECULAR)
- glLightfv(l, GL_SPECULAR, &specular.r);
- if(mask&POSITION)
- glLightfv(l, GL_POSITION, &position.x);
- if(mask&SPOT_DIR)
- glLightfv(l, GL_SPOT_DIRECTION, &spot_dir.x);
- if(mask&SPOT_EXP)
- glLightf(l, GL_SPOT_EXPONENT, spot_exp);
- if(mask&SPOT_CUTOFF)
- glLightf(l, GL_SPOT_CUTOFF, spot_cutoff.degrees());
- if(mask&ATTENUATION)
- {
- glLightf(l, GL_CONSTANT_ATTENUATION, attenuation[0]);
- glLightf(l, GL_LINEAR_ATTENUATION, attenuation[1]);
- glLightf(l, GL_QUADRATIC_ATTENUATION, attenuation[2]);
- }
-}
-
-void Light::update_matrix()
-{
- Vector3 up_dir;
- if(20*abs(direction.z)>abs(direction.x)+abs(direction.y))
- up_dir.y = 1;
- else
- up_dir.z = 1;
- Vector3 right_dir = normalize(cross(direction, up_dir));
-
- Vector4 columns[4];
- columns[0] = compose(right_dir, 0.0f);
- columns[1] = compose(cross(right_dir, direction), 0.0f);
- columns[2] = compose(-direction, 0.0f);
- columns[3] = position;
- matrix = Matrix::from_columns(columns);
-}
-
-void Light::set_diffuse(const Color &c)
-{
- diffuse = c;
- update_parameter(DIFFUSE);
-}
-
-void Light::set_specular(const Color &c)
-{
- specular = c;
- update_parameter(SPECULAR);
-}
-
-void Light::set_matrix(const Matrix &m)
-{
- Placeable::set_matrix(m);
- position = matrix.column(3);
- spot_dir = normalize(-matrix.column(2).slice<3>(0));
- direction = (position.w ? spot_dir : normalize(-position.slice<3>(0)));
- update_parameter(POSITION|SPOT_DIR);
- update_matrix();
-}
-
-void Light::set_position(const Vector4 &p)
-{
- position = p;
- update_parameter(POSITION);
- if(!position.w)
- direction = normalize(-position.slice<3>(0));
- update_matrix();
-}
-
-void Light::set_spot_direction(const Vector3 &d)
-{
- spot_dir = normalize(d);
- if(position.w)
- direction = spot_dir;
- update_parameter(SPOT_DIR);
- update_matrix();
-}
-
-void Light::set_spot_exponent(float e)
-{
- if(e<0)
- throw invalid_argument("Light::set_spot_exponent");
-
- spot_exp = e;
- update_parameter(SPOT_EXP);
-}
-
-void Light::set_spot_cutoff(float c)
-{
- set_spot_cutoff(Geometry::Angle<float>::from_degrees(c));
-}
-
-void Light::set_spot_cutoff(const Geometry::Angle<float> &c)
-{
- if(c<Geometry::Angle<float>::zero() || (c>Geometry::Angle<float>::right() && c!=Geometry::Angle<float>::straight()))
- throw invalid_argument("Light::set_spot_cutoff");
-
- spot_cutoff = c;
- update_parameter(SPOT_CUTOFF);
-}
-
-void Light::disable_spot_cutoff()
-{
- set_spot_cutoff(Geometry::Angle<float>::straight());
-}
-
-void Light::set_attenuation(float c, float l, float q)
-{
- attenuation[0] = c;
- attenuation[1] = l;
- attenuation[2] = q;
- update_parameter(ATTENUATION);
-}
-
-void Light::update_shader_data(ProgramData &shdata, const Matrix &view_matrix, unsigned i) const
-{
- string base = format("light_sources[%d]", i);
- shdata.uniform(base+".position", view_matrix*position);
- shdata.uniform(base+".diffuse", diffuse);
- shdata.uniform(base+".specular", specular);
-}
-
-void Light::bind_to(unsigned i) const
-{
- static Require _req(MSP_legacy_features);
-
- LightUnit &unit = LightUnit::get_unit(i);
- if(unit.set_light(this))
- {
- enable(GL_LIGHT0+unit.get_index());
- update_parameter(-1, unit.get_index());
- }
-}
-
-const Light *Light::current(unsigned i)
-{
- return LightUnit::get_unit(i).get_light();
-}
-
-void Light::unbind_from(unsigned i)
-{
- LightUnit &unit = LightUnit::get_unit(i);
- if(unit.set_light(0))
- disable(GL_LIGHT0+unit.get_index());
-}
-
-} // namespace GL
-} // namespace Msp