//----------------------------------------
void ofLight::setup() {
if(glIndex==-1){
bool bLightFound = false;
// search for the first free block
for(int i=0; i<OF_MAX_LIGHTS; i++) {
if(getActiveLights()[i] == false) {
glIndex = i;
retain(glIndex);
bLightFound = true;
break;
}
}
if( !bLightFound ){
ofLog(OF_LOG_ERROR, "ofLight : Trying to create too many lights: " + ofToString(glIndex));
}
if(bLightFound) {
// run this the first time, since it was not found before //
onPositionChanged();
setAmbientColor( getAmbientColor() );
setDiffuseColor( getDiffuseColor() );
setSpecularColor( getSpecularColor() );
setAttenuation( getAttenuationConstant(), getAttenuationLinear(), getAttenuationQuadratic() );
if(getIsSpotlight()) {
setSpotlightCutOff(getSpotlightCutOff());
setSpotConcentration(getSpotConcentration());
}
if(getIsSpotlight() || getIsDirectional()) {
onOrientationChanged();
}
}
}
}
//----------------------------------------
void ofLight::onOrientationChanged() {
if(data->glIndex==-1) return;
if(getIsDirectional()) {
// if we are a directional light and not positional, update light position (direction)
auto lookAtDir = glm::normalize(getGlobalOrientation() * glm::vec4(0,0,-1, 1)).xyz();
data->position = {lookAtDir.x,lookAtDir.y,lookAtDir.z,0.f};
ofGetGLRenderer()->setLightPosition(data->glIndex,data->position);
}else if(getIsSpotlight() || getIsAreaLight()) {
// determines the axis of the cone light
auto lookAtDir = glm::normalize(getGlobalOrientation() * glm::vec4(0,0,-1, 1)).xyz();
data->direction = lookAtDir;
ofGetGLRenderer()->setLightSpotDirection(data->glIndex, glm::vec4(data->direction, 0.0f));
}
if(getIsAreaLight()){
data->up = getUpDir();
data->right = getXAxis();
}
}
//----------------------------------------
void ofLight::onOrientationChanged() {
if(data->glIndex==-1) return;
// if we are a directional light and not positional, update light position (direction)
if(getIsDirectional()) {
// (tig) takes into account global orientation should node be parented.
ofVec3f lookAtDir = ( getGlobalTransformMatrix().getInverse() * ofVec4f(0,0,-1, 1) ).getNormalized();
data->position = ofVec4f(lookAtDir.x,lookAtDir.y,lookAtDir.z,0);
ofGetGLRenderer()->setLightPosition(data->glIndex,data->position);
}else if(getIsSpotlight() || getIsAreaLight()) {
// determines the axis of the cone light //
// (tig) takes into account global orientation should node be parented.
ofVec3f lookAtDir = ( getGlobalTransformMatrix().getInverse() * ofVec4f(0,0,-1, 1) ).getNormalized();
data->direction = ofVec3f(lookAtDir.x,lookAtDir.y,lookAtDir.z);
ofGetGLRenderer()->setLightSpotDirection(data->glIndex,data->direction);
}
if(getIsAreaLight()){
data->up = getUpDir();
data->right = getXAxis();
}
}
//----------------------------------------
void ofLight::setup() {
if(data->glIndex==-1){
bool bLightFound = false;
// search for the first free block
for(size_t i=0; i<ofLightsData().size(); i++) {
if(ofLightsData()[i].expired()) {
data->glIndex = i;
data->isEnabled = true;
ofLightsData()[i] = data;
bLightFound = true;
break;
}
}
if(!bLightFound && ofIsGLProgrammableRenderer()){
ofLightsData().push_back(data);
data->glIndex = ofLightsData().size() - 1;
data->isEnabled = true;
bLightFound = true;
}
if( bLightFound ){
// run this the first time, since it was not found before //
onPositionChanged();
setAmbientColor( getAmbientColor() );
setDiffuseColor( getDiffuseColor() );
setSpecularColor( getSpecularColor() );
setAttenuation( getAttenuationConstant(), getAttenuationLinear(), getAttenuationQuadratic() );
if(getIsSpotlight()) {
setSpotlightCutOff(getSpotlightCutOff());
setSpotConcentration(getSpotConcentration());
}
if(getIsSpotlight() || getIsDirectional()) {
onOrientationChanged();
}
}else{
ofLogError("ofLight") << "setup(): couldn't get active GL light, maximum number of "<< ofLightsData().size() << " reached";
}
}
}
