Camera/View Space

• The Camera processes the scene as seen in "View Space"

• View Space is the coordinate system with each vertex as seen from the camera.

• Use a View Matrix to convert from World Space to View Space

• View Matrix requires 4 values: Camera Position, Direction, Right and Up.

• Camera Position: Simply the position of the camera

• Direction: The direction the camera is looking in

• Direction vector actually points in opposite direction of the intuitive "direction"

• Right: Vector facing right of the camera, defines x-axis. Can calculate by doing cross product of Direction and "up" vector [0,1,0].

• Up: Upwards relative to where the camera is facing. Can calculate by doing cross product of Direction and Right vectors.

• Place values in matrices to calculate View Matrix
• View Matrix applied to a vertex will convert it to View Spaces.
• Fortunately, GLM has a function to do all of this.
• glm::mat4 ViewMatri = glm::looAt(position, target, Up);