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#ifndef LLMR_MAP_TRANSFORM
#define LLMR_MAP_TRANSFORM
#include <llmr/util/vec.hpp>
#include <llmr/util/mat4.hpp>
#include <llmr/util/animation.hpp>
#include <llmr/util/noncopyable.hpp>
#include <llmr/map/tile.hpp>
#include <forward_list>
namespace llmr {
struct box;
class Transform : private util::noncopyable {
public:
Transform();
// Animations
bool needsAnimation() const;
void updateAnimations();
void cancelAnimations();
void resize(uint16_t width, uint16_t height, uint16_t fb_width, uint16_t fb_height);
// Relative changes
void moveBy(double dx, double dy, double duration = 0);
void scaleBy(double ds, double cx = -1, double cy = -1, double duration = 0);
void rotateBy(double cx, double cy, double sx, double sy, double ex, double ey, double duration = 0);
// Absolute changes
void setScale(double scale, double cx = -1, double cy = -1, double duration = 0);
void setAngle(double angle, double duration = 0);
void setZoom(double zoom, double duration = 0);
void setLonLat(double lon, double lat, double duration = 0);
void setLonLatZoom(double lon, double lat, double zoom, double duration = 0);
// Getters
void matrixFor(mat4& matrix, const Tile::ID& id) const;
float getZoom() const;
float getNormalizedZoom() const;
int32_t getIntegerZoom() const;
double getScale() const;
double getAngle() const;
void getLonLat(double& lon, double& lat) const;
void getLonLatZoom(double& lon, double& lat, double& zoom) const;
// Animations
void startPanning();
void stopPanning();
void startRotating();
void stopRotating();
void startScaling();
void stopScaling();
// Temporary
box mapCornersToBox(uint32_t z) const;
// More getters
inline uint16_t getWidth() const { return width; }
inline uint16_t getHeight() const { return height; }
inline uint16_t getFramebufferWidth() const { return fb_width; }
inline uint16_t getFramebufferHeight() const { return fb_height; }
inline float getPixelRatio() const { return pixelRatio; }
private:
void setScaleXY(double new_scale, double xn, double yn, double duration = 0);
double pixel_x() const;
double pixel_y() const;
private:
// logical dimensions
uint16_t width = 0;
uint16_t height = 0;
// physical (framebuffer) dimensions
uint16_t fb_width = 0;
uint16_t fb_height = 0;
float pixelRatio = 1;
public:
bool rotating = false;
bool scaling = false;
bool panning = false;
private:
double x = 0, y = 0; // pixel values of the map center in the current scale
double angle = 0;
double scale = 1;
double min_scale = pow(2, 0);
double max_scale = pow(2, 20);
// cache values for spherical mercator math
double zc, Bc, Cc;
std::forward_list<std::shared_ptr<util::animation>> animations;
std::shared_ptr<util::animation> scale_timeout;
std::shared_ptr<util::animation> rotate_timeout;
std::shared_ptr<util::animation> pan_timeout;
};
}
#endif
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