OpenGL_Figures

OpenGL_Figures is an app written in C++ that allows you to draw pictures and create animations using some predefined shapes.

Table of contents

• About
• Technologies
• Switching between console and canvas
• User interface
  • add
  • edit
  • select
  • record-play
  • print
  • save-load
  • clone
• Other features
  • Trail
  • Visibility
  • Deformation

Technologies

• glew
• glfw
• glm

Switching between console and canvas

User interface

Console opens when the application starts.

List of available commands:

• help or ?. Available commands will be displayed: help, print, select, add, edit, load, save, clone, record, play and quit
• edit. Allows you to edit the parameters of the shape by selecting it by id
• add. Creates a new shape or joins shapes. To create you need to enter the id of the parent union, the unique id of the new element, and its type and parameters
• print. Prints a tree-like structure of all elements located on the scene
• select. Selects an element that can be controlled using WASD in graphical mode
• save. Saves the current state of the scene to a file
• load. Loads the scene from a file
• clone. Clones a scene element. To clone, you must enter the element id and the new parent id
• record. Starts recording the trajectory of a certain shape
• play. Plays recording
• quit. Exits the console mode and opens a graphic scene with the ability to control the elements of the scene
• F1 button. Pressing F1 exits the scene view and enters the console.

add

---

Let's add a star to the empty scene.

-----------------------------
add
Enter parent id: 0
Enter new item's id: 1
Enter type: <union/square/triangle/star/octagon>: star
Enter color <R, G, B, A> (0.0f - 1.0f), or type -1 to skip: 0.4 0.8 0.2 0.8
Enter scale <X, Y> (0.0f - 1.0f), or type -1 to skip: 0.7 0.8
Enter position <X, Y>, or type -1 to skip: 0.4 0.3
Enter hidden state (0, 1), or -1 to skip: 0
Enter deformed state (0, 1), or -1 to skip: 0
Enter trail state (0, 1), or -1 to skip: 0
-----------------------------
quit
-----------------------------

edit

---

Let's change color and add a trail to the star.

-----------------------------
edit
Enter item's id: 1
Enter color <R, G, B, A> (0.0f - 1.0f), or type -1 to skip: 0.8 0.4 0.2 1
Enter scale <X, Y> (0.0f - 1.0f), or type -1 to skip: -1
Enter position <X, Y>, or type -1 to skip: -1
Enter hidden state (0, 1), or -1 to skip: -1
Enter deformed state (0, 1), or -1 to skip: -1
Enter trail state (0, 1), or -1 to skip: 1
-----------------------------
quit
-----------------------------

select

---

-----------------------------
select 0
Enter id: Done
-----------------------------
quit
-----------------------------

Now we can control it using WASD.

Here we can see trail of the star.

I've added a triangle to demonstrate that union doesn't leave bounds of the window.

record-play

---

Let's record the star's (id = 1) path when moving union (id = 0) with WASD.

-----------------------------
select
Enter id: 0
Done
-----------------------------
record
Enter id: 1
Start recording
-----------------------------
quit
-----------------------------

After recording is done, let's press F1 to open console and play it.

-----------------------------
play
Start playing
-----------------------------
quit
-----------------------------

print

---

Let's print the current scene structure.

-----------------------------
print
0) Type:Union
        1) Type:Shape, Color: (0.8, 0.4, 0.2) Scale: (0.7, 0.8) Position: (0.07, 0.0318877), Deformed: 0, Hidden: 0
        2) Type:Shape, Color: (0.2, 0.1, 0.9) Scale: (0.3, 0.5) Position: (-0.387572, -0.310539), Deformed: 0, Hidden: 0
-----------------------------

save-load

---

Let's save the current scene state.

-----------------------------
save
Done
-----------------------------

Scene has been written to the file.

 type union id 0
 parent 0 type star id 1 scale 0.7 0.8 pos 0.07 0.0318877 color 0.8 0.4 0.2 1 isDeformed 0 isHidden 0 hasTrail 1
 parent 0 type triangle id 2 scale 0.3 0.5 pos -0.387572 -0.310539 color 0.2 0.1 0.9 0.6 isDeformed 0 isHidden 0 hasTrail 0

Now we can restart the app and load the scene.

-----------------------------
print
0) Type:Union
-----------------------------
load
Done
-----------------------------
print
0) Type:Union
        1) Type:Shape, Color: (0.8, 0.4, 0.2) Scale: (0.7, 0.8) Position: (0.07, 0.0318877), Deformed: 0, Hidden: 0
        2) Type:Shape, Color: (0.2, 0.1, 0.9) Scale: (0.3, 0.5) Position: (-0.387572, -0.310539), Deformed: 0, Hidden: 0
-----------------------------

clone

---

Let's clone the star.

-----------------------------
clone
Enter id to clone: 1
Enter parent id: 0
-----------------------------

Other features

Trail

---

When adding or editing a shape you can add a trail. This can be undone.

-----------------------------
add
Enter parent id: 0
Enter new item's id: 1
Enter type: <union/square/triangle/star/octagon>: square
Enter color <R, G, B, A> (0.0f - 1.0f), or type -1 to skip: 1 0.4 1 1
Enter scale <X, Y> (0.0f - 1.0f), or type -1 to skip: 1 1
Enter position <X, Y>, or type -1 to skip: 0 0
Enter hidden state (0, 1), or -1 to skip: 0
Enter deformed state (0, 1), or -1 to skip: 0
Enter trail state (0, 1), or -1 to skip: 1
-----------------------------
select
Enter id: 1
Done
-----------------------------
quit
-----------------------------

Visibility

---

When adding or editing a shape you can hide it. It will disappear from the canvas. This can be undone.

-----------------------------
edit
Enter item's id: 1
Enter color <R, G, B, A> (0.0f - 1.0f), or type -1 to skip: -1
Enter scale <X, Y> (0.0f - 1.0f), or type -1 to skip: -1
Enter position <X, Y>, or type -1 to skip: -1
Enter hidden state (0, 1), or -1 to skip: 1
Enter deformed state (0, 1), or -1 to skip: -1
Enter trail state (0, 1), or -1 to skip: -1
-----------------------------
quit
-----------------------------

Deformation

---

When adding or editing a shape you can deform it. The size will be halved. Undoing deformation returns initial size.

-----------------------------
edit
Enter item's id: 1
Enter color <R, G, B, A> (0.0f - 1.0f), or type -1 to skip: -1
Enter scale <X, Y> (0.0f - 1.0f), or type -1 to skip: -1
Enter position <X, Y>, or type -1 to skip: -1
Enter hidden state (0, 1), or -1 to skip: 0
Enter deformed state (0, 1), or -1 to skip: 1
Enter trail state (0, 1), or -1 to skip: 0
-----------------------------
quit
-----------------------------