Schedule Syllabus Resources

Using view transforms

GLM can create many view transforms.

Camera

glm::lookAt(eye, center, up).

• eye: the position of the camera (vec3)
• center: the point to look at (vec3)
• up: the camera up direction (vec3)
• returns: mat4 camera matrix

Orthographic projection

glm::ortho(left, right, top, bottom, zNear, zFar).

• left, right, top, bottom, zNear, zFar: bounds of the view volume (float)
• returns: mat4 orthographic matrix

Note: near and far keywords are used by many compilers!

Perspective projection

glm::perspective(fovY, aspect, zNear, zFar).

• fovY: radians of vertical field of view (float)
• aspect: aspect ratio width/height (i.e. 16/9) (float)
• zNear, zFar: view volume bounds (float)
• returns: mat4 perspective matrix
• Note: near and far keywords are used by many compilers!

This projection includes the needed orthographic matrix.

Note: near and far keywords are used by many compilers!