Eyeball

The Demoman's eyeball.

Alyx's eyeball in Ep2.

A vortigaunt's largest eye. The iris covers its entire surface.

Eyeball is a property of $model. It consists of two components:

1. An 'eye white' surface on the model, with a unique material.
2. A dynamic iris decal that travels over the eye white material to simulate the eye looking in different directions.

Tip:An iris material can cover the entire surface of the eye if need be.

Parameters

Tip:The qc_eyes tool can help you manage the potentially confusing string of numbers needed for this command.

<name>

Name of eyeball, used to match eyelid rules. For humans, use righteye and lefteye.

<bone_name>

The bone which the eye is parented to, typically the head.

<X> <Y> <Z>

World location of the center of the ball of the eye.

<material_name>

Material above which the iris material will be drawn. Make sure every eye has a unique one!

<diameter>

Diameter of the ball of the eye. Prevents eyes rolling inside the head. Note that this means that the iris will travel in a circle even though human eyes are oval: your model's flex should accommodate for this.

<angle>

Default yaw offset (from directly forward) for iris. Humans are typically 2-4 degrees wall-eyed. Not setting this correctly will result in either your characters appearing cross-eyed, or if you've compensated by misplacing the ball of the eye, them not tracking side to side.

<iris_material>

Material to use as the iris texture.

Todo: This now appears to be a property of the eyeball material. Need some OB QCs to confirm.

<pupil_scale>

Scale of the iris texture.

Example

$model "female_01" "female_01_reference_RE.smd" {
   eyeball righteye ValveBiped.Bip01_Head1 -1.261 -3.702 64.974 eyeball_r 1  4 pupil_r 0.66
}

See also

• The EyeRefract and Eyes shaders
• Eye Position Setup, for a guide to calculating the various numbers required
• qc_eyes, a tool to aid your calculations