# surface

**—**

__MakieCore.surface__*Function*.

```
surface(x, y, z)
surface(z)
```

Plots a surface, where `(x, y)`

define a grid whose heights are the entries in `z`

. `x`

and `y`

may be `Vectors`

which define a regular grid, **or** `Matrices`

which define an irregular grid.

**Plot type**

The plot type alias for the `surface`

function is `Surface`

.

## Examples

```
using GLMakie
xs = LinRange(0, 10, 100)
ys = LinRange(0, 15, 100)
zs = [cos(x) * sin(y) for x in xs, y in ys]
surface(xs, ys, zs, axis=(type=Axis3,))
```

```
using GLMakie
using DelimitedFiles
volcano = readdlm(Makie.assetpath("volcano.csv"), ',', Float64)
surface(volcano,
colormap = :darkterrain,
colorrange = (80, 190),
axis=(type=Axis3, azimuth = pi/4))
```

```
using GLMakie
using SparseArrays
using LinearAlgebra
# This example was provided by Moritz Schauer (@mschauer).
#=
Define the precision matrix (inverse covariance matrix)
for the Gaussian noise matrix. It approximately coincides
with the Laplacian of the 2d grid or the graph representing
the neighborhood relation of pixels in the picture,
https://en.wikipedia.org/wiki/Laplacian_matrix
=#
function gridlaplacian(m, n)
S = sparse(0.0I, n*m, n*m)
linear = LinearIndices((1:m, 1:n))
for i in 1:m
for j in 1:n
for (i2, j2) in ((i + 1, j), (i, j + 1))
if i2 <= m && j2 <= n
S[linear[i, j], linear[i2, j2]] -= 1
S[linear[i2, j2], linear[i, j]] -= 1
S[linear[i, j], linear[i, j]] += 1
S[linear[i2, j2], linear[i2, j2]] += 1
end
end
end
end
return S
end
# d is used to denote the size of the data
d = 150
# Sample centered Gaussian noise with the right correlation by the method
# based on the Cholesky decomposition of the precision matrix
data = 0.1randn(d,d) + reshape(
cholesky(gridlaplacian(d,d) + 0.003I) \ randn(d*d),
d, d
)
surface(data; shading = NoShading, colormap = :deep)
surface(data; shading = NoShading, colormap = :deep)
```

## Attributes

### alpha

Defaults to `1.0`

The alpha value of the colormap or color attribute. Multiple alphas like in `plot(alpha=0.2, color=(:red, 0.5)`

, will get multiplied.

### backlight

Defaults to `0.0`

Sets a weight for secondary light calculation with inverted normals.

### color

Defaults to `nothing`

Can be set to an `Matrix{<: Union{Number, Colorant}}`

to color surface independent of the `z`

component. If `color=nothing`

, it defaults to `color=z`

.

### colormap

Defaults to `@inherit colormap :viridis`

Sets the colormap that is sampled for numeric `color`

s. `PlotUtils.cgrad(...)`

, `Makie.Reverse(any_colormap)`

can be used as well, or any symbol from ColorBrewer or PlotUtils. To see all available color gradients, you can call `Makie.available_gradients()`

.

### colorrange

Defaults to `automatic`

The values representing the start and end points of `colormap`

.

### colorscale

Defaults to `identity`

The color transform function. Can be any function, but only works well together with `Colorbar`

for `identity`

, `log`

, `log2`

, `log10`

, `sqrt`

, `logit`

, `Makie.pseudolog10`

and `Makie.Symlog10`

.

### depth_shift

Defaults to `0.0`

adjusts the depth value of a plot after all other transformations, i.e. in clip space, where `0 <= depth <= 1`

. This only applies to GLMakie and WGLMakie and can be used to adjust render order (like a tunable overdraw).

### diffuse

Defaults to `1.0`

Sets how strongly the red, green and blue channel react to diffuse (scattered) light.

### fxaa

Defaults to `true`

adjusts whether the plot is rendered with fxaa (anti-aliasing, GLMakie only).

### highclip

Defaults to `automatic`

The color for any value above the colorrange.

### inspectable

Defaults to `true`

sets whether this plot should be seen by `DataInspector`

.

### inspector_clear

Defaults to `automatic`

Sets a callback function `(inspector, plot) -> ...`

for cleaning up custom indicators in DataInspector.

### inspector_hover

Defaults to `automatic`

Sets a callback function `(inspector, plot, index) -> ...`

which replaces the default `show_data`

methods.

### inspector_label

Defaults to `automatic`

Sets a callback function `(plot, index, position) -> string`

which replaces the default label generated by DataInspector.

### invert_normals

Defaults to `false`

Inverts the normals generated for the surface. This can be useful to illuminate the other side of the surface.

### lowclip

Defaults to `automatic`

The color for any value below the colorrange.

### material

Defaults to `nothing`

RPRMakie only attribute to set complex RadeonProRender materials. *Warning*, how to set an RPR material may change and other backends will ignore this attribute

### model

Defaults to `automatic`

Sets a model matrix for the plot. This overrides adjustments made with `translate!`

, `rotate!`

and `scale!`

.

### nan_color

Defaults to `:transparent`

The color for NaN values.

### overdraw

Defaults to `false`

Controls if the plot will draw over other plots. This specifically means ignoring depth checks in GL backends

### shading

Defaults to `automatic`

Sets the lighting algorithm used. Options are `NoShading`

(no lighting), `FastShading`

(AmbientLight + PointLight) or `MultiLightShading`

(Multiple lights, GLMakie only). Note that this does not affect RPRMakie.

### shininess

Defaults to `32.0`

Sets how sharp the reflection is.

### space

Defaults to `:data`

sets the transformation space for box encompassing the plot. See `Makie.spaces()`

for possible inputs.

### specular

Defaults to `0.2`

Sets how strongly the object reflects light in the red, green and blue channels.

### ssao

Defaults to `false`

Adjusts whether the plot is rendered with ssao (screen space ambient occlusion). Note that this only makes sense in 3D plots and is only applicable with `fxaa = true`

.

### transformation

Defaults to `automatic`

No docs available.

### transparency

Defaults to `false`

Adjusts how the plot deals with transparency. In GLMakie `transparency = true`

results in using Order Independent Transparency.

### visible

Defaults to `true`

Controls whether the plot will be rendered or not.