Matrix4f SpotLight::lightProjectionMatrix() const
{
return projectionMatrix() * lightMatrix();
}
Matrix4f SpotLight::inverseLightMatrix() const
{
return lightMatrix().inverse();
}
void RenderLists::buildLightData(
Camera* camera,
Light* shadowCaster,
LightData& lightData )
{
unsigned i = 0;
for ( std::vector<Light*>::iterator it = m_lights.begin();
it != m_lights.end(); ++it )
{
Light* light = *it;
// TODO: FIX THIS SHIT
glm::vec3 pos( light->getTransform()->translation );
if ( light->getTransform()->parent != NULL )
{
glm::mat4 lightMatrix( 1.0f );
light->getTransform()->parent->apply( lightMatrix );
pos = ( lightMatrix * glm::vec4( pos, 1.0f ) ).xyz();
}
// glm::vec3 pos( light->getTransform()->translation );
// calculate rotation
glm::mat4 rotMat = glm::mat4( 1.0f );
rotMat *= glm::rotate(
light->getTransform()->rotation.z * util::math::DEGREES_TO_RADIANS,
glm::vec3( 0.0f, 0.0f, 1.0f )
);
rotMat *= glm::rotate(
light->getTransform()->rotation.y * util::math::DEGREES_TO_RADIANS,
glm::vec3( 0.0f, 1.0f, 0.0f )
);
rotMat *= glm::rotate(
light->getTransform()->rotation.x * util::math::DEGREES_TO_RADIANS,
glm::vec3( 1.0f, 0.0f, 0.0f )
);
glm::vec3 rot( 0.0f, 0.0f, -1.0f );
rot = glm::vec3( rotMat * glm::vec4( rot, 0.0f ) );
// add generic data
lightData.names.push_back( light->getId() );
lightData.types.push_back(
static_cast<int>( light->getLightType() ) );
lightData.colours.push_back( light->getValue().r );
lightData.colours.push_back( light->getValue().g );
lightData.colours.push_back( light->getValue().b );
// light type specific data
switch ( light->getLightType() )
{
case light::DIRECTIONAL:
{
pos = glm::vec3(
camera->getViewMatrix() * glm::vec4( pos, 0.0f ) );
rot = glm::vec3(
camera->getViewMatrix()* glm::vec4( rot, 0.0f ) );
lightData.attenuations.push_back( 1.0f );
lightData.attenuations.push_back( 0.0f );
lightData.attenuations.push_back( 0.0f );
lightData.arcs.push_back( 0.0f );
lightData.arcs.push_back( 0.0f );
break;
}
case light::POINT:
{
PointLight* point = dynamic_cast<PointLight*>( light );
pos = glm::vec3(
camera->getViewMatrix() * glm::vec4( pos, 1.0f ) );
rot = glm::vec3(
camera->getViewMatrix() * glm::vec4( rot, 1.0f ) );
lightData.attenuations.push_back( point->getConstantAtt() );
lightData.attenuations.push_back( point->getLinearAtt() );
lightData.attenuations.push_back( point->getQuadraticAtt() );
lightData.arcs.push_back( 0.0f );
lightData.arcs.push_back( 0.0f );
break;
}
case light::SPOT:
{
SpotLight* spot = dynamic_cast<SpotLight*>( light );
pos = glm::vec3(
camera->getViewMatrix() * glm::vec4( pos, 1.0f ) );
rot = glm::vec3(
camera->getViewMatrix() * glm::vec4( rot, 0.0f ) );
lightData.attenuations.push_back( spot->getConstantAtt() );
lightData.attenuations.push_back( spot->getLinearAtt() );
lightData.attenuations.push_back( spot->getQuadraticAtt() );
lightData.arcs.push_back(
util::math::cosd( spot->getOuterArc() ) );
lightData.arcs.push_back(
util::math::cosd( spot->getInnerArc() ) );
break;
}
}
// positions
lightData.positions.push_back( pos.x );
lightData.positions.push_back( pos.y );
lightData.positions.push_back( pos.z );
// rotations
lightData.rotations.push_back( rot.x );
lightData.rotations.push_back( rot.y );
lightData.rotations.push_back( rot.z );
// inverse
lightData.inverses.push_back( light->isInversed() );
// shadow map
lightData.shadowMap = m_shadowMap.getTexture();
// shadow caster
if ( *it == shadowCaster )
{
lightData.shadowCaster = i;
}
++i;
}
}
