# Color Quantities

Visualize color rgb-valued data at the elements of a surface mesh.

Example: visualizing random colors at faces

#include "polyscope/surface_mesh.h"

// Make some random colors
std::vector<std::array<double, 3>> fColor(nFaces);
for (size_t iF = 0; iF < nFaces; iF++) {
std::vector<size_t>& face = faceIndices[iF];
fColor[iF] = {{polyscope::randomUnit(), polyscope::randomUnit(), polyscope::randomUnit()}};
}

// Visualize


SurfaceMesh::addVertexColorQuantity(std::string name, const T& values)

Add a color quantity defined at the vertices of the mesh.

• values is the array of colors at vertices. The type should be adaptable to a 3-vector array of floats. The length should be the number of vertices in the mesh.

RGB values are interpreted in the range [0,1].

SurfaceMesh::addFaceColorQuantity(std::string name, const T& values)

Add a color quantity defined at the faces of the mesh.

• values is the array of colors at faces. The type should be adaptable to a 3-vector array of floats. The length should be the number of faces in the mesh.

RGB values are interpreted in the range [0,1].