IdentityTransform returns an identity transform of a vector.

LoadHeatmap loads the heatmap from the given PNG file, uses its first row of pixels as color spectrum, and returns the gamma-corrected color spectrum.

NewAxisAngleRotation creates a transform that rotates a point around axis n by theta.

NewCamera creates a new Camera given view transform, projector and screen.

NewCircularCameraOrbit creates a circular camera orbit with normal n, and numPositions positions equally distributed along the circular orbit.

NewOrtho2DCamera returns a camera in canonical position (sitting at +z, looking at -z with y as up), given the screen mapping.

NewPerspective returns a perspective projector with respect to the canonical camera position, i.e., the camera is positioned at origin, forward is -z, up is +y.

NewScreen creates a Screen with dimension width and height, mapping into the rectangle [x0,x1)×(y0,y1].

NewStationaryCamera returns a CameraOrbit with only one position.

NewViewTransform creates a ViewTransform with camera position at pos, looking into the forward direction and pointing up to the up direction.

RandColor returns a full-saturation color of random hue.

Camera is a simple wrapper of a view transform, a projector and a screen.

CameraOrbit represents an orbiting camera with a finite number of positions defined by the position index.

Projector defines an interface projecting a Vec3 into a Projection.

Transform defines a 3D transformation.

Projection defines a projected Vec3.

Vec3 represents a 3D vector.