Write an OpenGL program that allows interactive creation of polygons via mouse input. That is, I click to create new vertices until I like the polygon, then make some indication (double click, right click, press a key, click a button; your choice) that I’m done, and the polygon is created
Apparently you didn't read this before posting your assignment:
Homework Posting Tips
Please show your work. Tutors will not do your homework for you. Please show your work for any question that you are posting.
To create an OpenGL program that allows interactive creation of polygons via mouse input, you'll need to utilize the OpenGL library along with a programming language such as C++ or Python. Here's a step-by-step guide to achieving this:
1. Set up the OpenGL environment:
- Install the necessary libraries for OpenGL development, such as GLFW (for window management) and GLEW (for accessing OpenGL functions).
- Create a new project in your chosen programming language and configure it to include the required libraries.
2. Initialize the program:
- Create a window using the GLFW library, configuring its size and properties.
- Set up an OpenGL context for the window.
3. Implement mouse input handling:
- Register mouse event callbacks using GLFW functions to capture mouse button presses and releases, as well as mouse movement.
- Store the mouse coordinates as vertices of the polygon when the left mouse button is pressed.
4. Store and draw the polygon:
- Keep track of all the vertices clicked by the user in a list or array.
- Continuously render the OpenGL scene, using the stored vertices to draw the polygon using OpenGL functions such as `glVertex2f()` or `glDrawArrays()`.
5. Indicate the completion of drawing the polygon:
- Define a condition (e.g., double-click, right-click, press a key, or click a button) to signify that the polygon creation is complete.
- Implement the necessary event handling to detect this condition and stop adding vertices to the polygon.
6. Finalize the polygon creation:
- Once the polygon creation is complete, you can perform any additional operations on the polygon, such as calculating area or detecting collision.
- You can also provide options for the user to modify or edit the polygon using additional interactions.
Remember to include necessary error handling, cleanup mechanisms, and efficient OpenGL rendering techniques to ensure smooth performance.
Note: This explanation provides a high-level overview of the process. The specific implementation details may vary depending on the programming language and libraries you choose to use.