pmp-library  1.2.1

A simple GLFW viewer with trackball user interface. More...

#include <pmp/visualization/TrackballViewer.h>

Inheritance diagram for TrackballViewer:
Window MeshViewer

Public Member Functions

 TrackballViewer (const char *title, int width, int height, bool showgui=true)
virtual ~TrackballViewer ()
void set_scene (const vec3 &center, float radius)
 define the center and radius of the scene/ used for trackball rotation
void view_all ()
 adjust camera such that the whole scene (defined by set_scene()) is visible
- Public Member Functions inherited from Window
 Window (const char *title, int width, int height, bool showgui=true)
virtual ~Window ()
int run ()
 main window loop

Protected Member Functions

virtual void display (void) override
 this function is called when the scene has to be rendered. More...
virtual void keyboard (int key, int code, int action, int mods) override
 this function handles keyboard events
virtual void mouse (int button, int action, int mods) override
 this function handles mouse button events
virtual void motion (double xpos, double ypos) override
 this function handles mouse motion (passive/active position)
virtual void scroll (double xoffset, double yoffset) override
 this function handles mouse scroll events
virtual void resize (int width, int height) override
 this function is called if the window is resized
void clear_draw_modes ()
 reset the list of draw modes
unsigned int add_draw_mode (const std::string &drawMode)
 add a draw mode
void set_draw_mode (const std::string &drawMode)
 activate a draw mode
virtual void init ()
 initialize all OpenGL states
virtual void draw (const std::string &drawMode)=0
 this function is responsible for rendering the scene
void rotation (int x, int y)
 turn a mouse event into a rotation around the scene center. calls rotate().
void translation (int x, int y)
 turn a mouse event into a translation in the view plane. calls translate().
void zoom (int x, int y)
 turn a mouse event into a zoom, i.e., translation in z-direction. calls translate().
bool pick (vec3 &result)
 get 3D position under the mouse cursor
bool pick (int x, int y, vec3 &result)
 get 3D position of 2D position (x,y)
void fly_to (int x, int y)
 fly toward the position Distributed under the mouse cursor and set rotation center to it
void translate (const vec3 &trans)
 translate the scene and update modelview matrix
void rotate (const vec3 &axis, float angle)
 rotate the scene (around its center) and update modelview matrix
bool map_to_sphere (const ivec2 &point, vec3 &result)
 virtual trackball: map 2D screen point to unit sphere. used by rotate().
- Protected Member Functions inherited from Window
virtual void character (unsigned int)
 this function handles unicode character events
virtual void process_imgui ()
 this function renders the ImGUI elements and handles their events
virtual void do_processing ()
 this function is called just before rendering
void init_imgui ()
 setup ImGUI user interface
void scale_imgui (float scale)
 scale ImGUI elements and font
bool show_imgui () const
 is ImGUI visible or hidden?
void show_imgui (bool b)
 show or hide ImGUI
void clear_help_items ()
 clear help items
void add_help_item (std::string key, std::string description, int position=-1)
 add key binding (or general action description)
void show_help ()
 show ImGUI help dialog
void screenshot ()
 take a screenshot, save it to title-n.png using the window title and an incremented number n.
int width () const
 width of window
int height () const
 height of window
float high_dpi_scaling () const
 highDPI scaling
float imgui_scaling () const
 imgui scaling
void cursor_pos (double &x, double &y) const
 get position of mouse cursor
bool left_mouse_pressed () const
 is left mouse button pressed down?
bool right_mouse_pressed () const
 is right mouse button pressed down?
bool middle_mouse_pressed () const
 is middle mouse button pressed down?
bool ctrl_pressed () const
 is CTRL modifier key pressed down?
bool alt_pressed () const
 is ALT modifier key pressed down?
bool shift_pressed () const
 is SHIFT modifier key pressed down?

Protected Attributes

unsigned int draw_mode_
 draw modes
vec3 center_
 scene position and dimension
float near_
 projection parameters
mat4 projection_matrix_
 OpenGL matrices.
ivec2 last_point_2d_
 trackball helpers

Detailed Description

A simple GLFW viewer with trackball user interface.

Member Function Documentation

◆ display()

void display ( void  )

this function is called when the scene has to be rendered.

it clears the buffers, calls the draw() method, and performs buffer swap

Implements Window.