Project 1a ©Jorg Peters

Purpose

Learn to move objects via the mouse in OpenGL

Set up

Task 1: Create Scene

Display 8 points on the screen each of a different color and arranged uniformly on a circle.

Task 2: Picking

Upon mouse click, change the color of the selected point to highlight it. Restore the original color upon release.
Use orthogonal projection.

Task 3: Dragging

Implement the ability to move the points with the mouse

Make all points suitably large.

• The OpenGL window origin (0,0) is bottom-left, whereas the mouse reports with (0,0) on top-left
• In order to map mouse to world coordinates
  • retrieve the cursor position using glfwGetCursorPos
  • obtain world coordinates using glm::unProject(glm::vec3(---,---, 0.0), ModelMatrix, ProjectionMatrix, vp) where "---" is a place-holder for your code and vp is short for Viewport.
  • Consult web OGL documentation!

Task 4: Redo in wehGL

Implement Tasks 1--3 in webGL using code base webGL
(which uses the ideas of picking )

WHAT TO SUBMIT

• Your modified source files (.cpp's, shaders, etc)
• A link to a screen capture of your running program showcasing the implementation of all of the tasks using recordit (Mac, Win) or similar software.