Analyse the following code carefully. attribute vec4 vPosition; attribute vec4 vColor; varying vec4 fColor; uniform vec3...

  

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Analyse the following code carefully. attribute vec4 vPosition; attribute vec4 vColor; varying vec4 fColor; uniform vec3 theta; void main() { vec3 angles = radians (theta); vec3 c = cos (angles) ; vec3 s = sin (angles) ; 0.0, 0.0, mat4 rx = mat4 (1.0, 0.0, 0.0, C.X, S.X, 0.0, 0.0, -s.x, C.X, 0.0, 0.0, 0.0, 0.0, 1.0); mat4 ry = mat4 (c.y, 0.0, -s.y, 0.0, 0.0, 1.0, 0.0, 0.0, s.y, 0.0, c.y, 0.0, 0.0, 0.0, 0.0, 1.0); mat4 rz= mat4 (c.z, -s.z, 0.0, 0.0, S.Z, C.Z, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0); fColor vColor; gl Position = rz* ry*rx* vPosition; (i) (ii) Explain the role of the variable theta and how it affects the rendering of an object from the code above. (7 marks) Expand on the code above to support translation in the x, y and z axes. (8 marks) Analyse the following code carefully. attribute vec4 vPosition; attribute vec4 vColor; varying vec4 fColor; uniform vec3 theta; void main() { vec3 angles = radians (theta); vec3 c = cos (angles) ; vec3 s = sin (angles) ; 0.0, 0.0, mat4 rx = mat4 (1.0, 0.0, 0.0, C.X, S.X, 0.0, 0.0, -s.x, C.X, 0.0, 0.0, 0.0, 0.0, 1.0); mat4 ry = mat4 (c.y, 0.0, -s.y, 0.0, 0.0, 1.0, 0.0, 0.0, s.y, 0.0, c.y, 0.0, 0.0, 0.0, 0.0, 1.0); mat4 rz= mat4 (c.z, -s.z, 0.0, 0.0, S.Z, C.Z, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0); fColor vColor; gl Position = rz* ry*rx* vPosition; (i) (ii) Explain the role of the variable theta and how it affects the rendering of an object from the code above. (7 marks) Expand on the code above to support translation in the x, y and z axes. (8 marks)

Answer rating: 100% (QA)

i The variable theta plays a crucial role in the transformation of an objects position in 3D space by specifying the amount of rotation around the x y ... View the full answer