DVSceneView class final

A perspective camera, with the orbit it is controlled by.

Screen coordinates are logical pixels with the origin at the top left and y growing downward, the way Flutter lays out, so a tap's local position goes straight into rayAt.

Constructors

DVSceneView({required DVVec3 eye, required DVVec3 target, DVVec3 up = DVVec3.up, double fovYDegrees = 45, double near = 0.1, double far = 1000})

DVSceneView.fromCamera(DVSceneCameraData camera, {DVMat4? world})

The view a document camera describes: its orbit when it has one, otherwise looking down the node's -Z from wherever world puts it.

factory

DVSceneView.orbit({DVVec3 target = DVVec3.zero, required double distance, double yaw = 0, double pitch = 0, double fovYDegrees = 45, double near = 0.1, double far = 1000})

A camera distance from target, turned yaw radians about the up axis and raised pitch radians above the horizon. Yaw 0 and pitch 0 look down -Z.

factory

Properties

distance → double

final

eye → DVVec3

final

far → double

final

fovYDegrees → double

final

hashCode → int

The hash code for this object.

no setter, inherited

near → double

final

pitch → double

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

target → DVVec3

final

up → DVVec3

final

view → DVMat4

no setter

yaw → double

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

orbitBy({double yaw = 0, double pitch = 0, double zoom = 1}) → DVSceneView

This orbit turned by yaw and pitch radians and moved zoom times closer, clamped so it never passes the pole or its near plane.

project(DVVec3 point, double width, double height) → DVVec3?

Where point is drawn in a width x height viewport, as (x, y, depth in -1..1), or null when it is behind the camera -- projecting such a point anyway mirrors it onto the screen.

projection(double aspect) → DVMat4

rayAt(double x, double y, double width, double height) → DVRay

The ray from the eye through pixel (x, y) of a width x height viewport.

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

maxPitch → const double

How close to straight up or down an orbit may turn. Short of the pole, because at it the up vector and the view direction coincide and the view has no defined right.