//----------------------------------------
void ofLight::onPositionChanged() {
if(data->glIndex==-1) return;
// if we are a positional light and not directional, update light position
if(getIsSpotlight() || getIsPointLight() || getIsAreaLight()) {
data->position = ofVec4f(getGlobalPosition().x,getGlobalPosition().y,getGlobalPosition().z,1);
ofGetGLRenderer()->setLightPosition(data->glIndex,data->position);
}
}
//----------------------------------------
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::customDraw(const ofBaseRenderer * renderer) const{;
if(getIsPointLight()) {
renderer->drawSphere( 0,0,0, 10);
} else if (getIsSpotlight()) {
float coneHeight = (sin(data->spotCutOff*DEG_TO_RAD) * 30.f) + 1;
float coneRadius = (cos(data->spotCutOff*DEG_TO_RAD) * 30.f) + 8;
const_cast<ofBaseRenderer*>(renderer)->rotate(-90,1,0,0);
renderer->drawCone(0, -(coneHeight*.5), 0, coneHeight, coneRadius);
} else if (getIsAreaLight()) {
const_cast<ofBaseRenderer*>(renderer)->pushMatrix();
renderer->drawPlane(data->width,data->height);
const_cast<ofBaseRenderer*>(renderer)->popMatrix();
}else{
renderer->drawBox(10);
}
ofDrawAxis(20);
}