Struct glium::draw_parameters::Depth [−] [src]

pub struct Depth {
    pub test: DepthTest,
    pub write: bool,
    pub range: (f32, f32),
    pub clamp: DepthClamp,
}

Represents the depth parameters of a draw command.

Fields

`test`	The function that the GPU will use to determine whether to write over an existing pixel on the target. Don't forget to set `depth_write` appropriately if you use a depth test. See the `DepthTest` documentation for more details. The default is `Overwrite`.
`write`	Sets whether the GPU will write the depth values on the depth buffer if they pass the depth test. The default is `false`. You most likely want `true` if you're doing depth testing. If you pass `true` but don't have a depth buffer available, drawing will produce a `NoDepthBuffer` error.
`range`	The range of possible Z values in surface coordinates. Just like OpenGL turns X and Y coordinates between `-1.0` and `1.0` into surface coordinates, it will also map your Z coordinates to a certain range which you can specify here. The two values must be between `0.0` and `1.0`, anything outside this range will result in a panic. By default the depth range is `(0.0, 1.0)`. The first value of the tuple must be the "near" value, where `-1.0` will be mapped. The second value must be the "far" value, where `1.0` will be mapped. It is possible for the "near" value to be greater than the "far" value.
`clamp`	Sets whether the depth values of samples should be clamped to `0.0` and `1.0`. The default value is `NoClamp`.