Description
A06 – View matrices
The Vulkan application whose source code is contained in file Assignment06.cpp, shows a model of a space station where a robot can move in. Both first and third person view are implemented using the functions contained view.cpp. Pressing the SPACE key on the keyboard, the view cycles between four view modes:
- First person view
- Third person view
- Top view
- Impostor view
The first two modes needs to be implemented for the assignment, while modes 3 and 4 are there to help you debug your application. In particular:
Mode 1: First Person View
The application calls procedure LookInDirMat(…) which must create and return a glm::mat4 view matrix. It receives as input a glm::vec3 vector called Pos, which contains the location of the camera. The direction where it is aiming is instead contained in glm::vec3 Angs. In particular:
- Element x contains the direction of the camera a.
- Element y contains the elevation of the camera b.
- Element z contains the rollo of the camera r.
Mode 2: Third Person View
The application calls procedure LookAtMat(…) which must create and return a glm::mat4 view matrix. It receives as input a glm::vec3 vector called Pos, which contains the location of the camer, and a glm::vec3 vector called aim that contains the target. The up vector, which is not passed to the procedure, is u = |0,1,0|. The camera roll is passed as an extra floating point parameter Roll. Although roll is not generally included in the Look-at view matrix model, it can be implement in one of two different ways:
- Changing the direction of the up vector, according to the roll angle.
- Placing a rotation along the z-axis of –r after transformation of the view matrix created with the technique shown during the lessons.
You can move the view using the same keys as in Assigment0:
| ESC – quit the application | SPACE BAR – move to the next view | X: shows the walls in wireframe | |||||
| Q: roll CCW | W: forward | E: roll CW | ↑: look up | |||
| A: left | S: backward | D: right | ←: look left | ↓: look down | →: look right | |
