02. Billboards

Billboards are quads which normals are always facing the camera.

In order to render a billboard, add Billboard functional declaration into your Frame context, which applies a built-in billboard shader:

Billboard (
    standardUniforms {
        xscale = 2.0f
        yscale = 2.0f
        colorTexture = texture("/sprite.png")
    },
    position = Vec3(1.0f, 1.0f, 0.0f),
    transparent = true
)

Billboard shader supports the following uniforms (in addition to standart shader uniforms):

Uniform name	Type	Default value	Description
xscale	Float	1.0f	Horizontal scale
yscale	Float	1.0f	Vertical scale
rotation	Float	0.0f	Rotation (in radians)