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// Copyright 1996-2023 Cyberbotics Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SPOT_LIGHT_HPP
#define SPOT_LIGHT_HPP
#include "Constants.hpp"
#include "PositionalLight.hpp"
namespace wren {
// Represents a light source which radiates with full intensity inside a cone surrounding
// its direction parameter, and with falling intensity inside a larger cone in the same direction.
// Currently, the orientation isn't influenced by the orientation of the containing Transform.
class SpotLight : public PositionalLight {
public:
// Encapsulate memory management
static SpotLight *createSpotLight() { return new SpotLight(); }
void setDirection(const glm::vec3 &direction) {
mDirectionRelative = direction;
mIsDirectionDirty = true;
}
void setBeamWidth(float beamWidth) { mCutOffInner = beamWidth; }
void setCutOffAngle(float cutOffAngle) { mCutOffOuter = cutOffAngle; }
const glm::vec3 &direction() const {
update();
return mDirectionAbsolute;
}
float beamWidth() const { return mCutOffInner; }
float cutOffAngle() const { return mCutOffOuter; }
void setMatrixDirty() const override {
PositionalLight::setMatrixDirty();
mIsDirectionDirty = true;
}
LightNode::Type type() override { return TYPE_SPOT; }
void update() const override {
PositionalLight::update();
if (mIsDirectionDirty) {
if (mParent)
mDirectionAbsolute = mParent->orientation() * mDirectionRelative;
else
mDirectionAbsolute = mDirectionRelative;
mIsDirectionDirty = false;
}
}
private:
SpotLight();
virtual ~SpotLight();
mutable bool mIsDirectionDirty;
mutable glm::vec3 mDirectionAbsolute;
glm::vec3 mDirectionRelative;
float mCutOffInner;
float mCutOffOuter;
};
} // namespace wren
#endif // SPOT_LIGHT_HPP