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#pragma once
#include <mbgl/util/optional.hpp>
#include <mbgl/util/size.hpp>
#include "quaternion.hpp"
namespace mbgl {
class LatLng;
namespace util {
class Camera {
public:
Camera();
vec3 getPosition() const;
mat4 getCameraToWorld(double scale, bool flippedY) const;
mat4 getWorldToCamera(double scale, bool flippedY) const;
mat4 getCameraToClipPerspective(double fovy, double aspectRatio, double nearZ, double farZ) const;
vec3 forward() const;
vec3 right() const;
vec3 up() const;
const Quaternion& getOrientation() const { return orientation; }
void getOrientation(double& pitch, double& bearing) const;
void setOrientation(double pitch, double bearing);
void setOrientation(const Quaternion& orientation_);
void setPosition(const vec3& position);
// Computes orientation using forward and up vectors of the provided coordinate frame.
// Only bearing and pitch components will be used. Does not return a value if input is invalid
static optional<Quaternion> orientationFromFrame(const vec3& forward, const vec3& up);
private:
Quaternion orientation;
mat4 transform; // Position (mercator) and orientation of the camera
};
} // namespace util
} // namespace mbgl
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