Defines a Camera with a custom projection matrix. 更多...
| import 语句： | import QtQuick3D |
| 继承： | Camera |
A Camera defines how the content of the 3D scene is projected onto a 2D surface, such as a View3D . A scene needs at least one Camera in order to visualize its contents.
It is possible to position and rotate the Camera like any other spatial Node in the scene. The Node 's location and orientation determines where the Camera is in the scene, and what direction it is facing. The default orientation of the Camera has its forward vector pointing along the negative Z axis and its up vector along the positive Y axis.
The CustomCamera type provides a Camera where the projection matrix can be customized freely.
The following example creates a CustomCamera at position [0, 200, 300] in the scene, with a 30 degree downward pitch, and a custom projection matrix based on custom near and far plane distances, and a custom field of view.
CustomCamera {
position: Qt.vector3d(0, 200, 300)
eulerRotation.x: -30
property real near: 10.0
property real far: 10000.0
property real fov: 60.0 * Math.PI / 180.0
projection: Qt.matrix4x4(Math.cos(fov / 2) / Math.sin(fov / 2) * (window.height / window.width), 0, 0, 0,
0, Math.cos(fov / 2) / Math.sin(fov / 2), 0, 0,
0, 0, -(near + far) / (far - near), -(2.0 * near * far) / (far - near),
0, 0, -1, 0);
}
另请参阅 PerspectiveCamera , OrthographicCamera ，和 FrustumCamera .
| projection : matrix4x4 |
This property defines the CustomCamera 's projection matrix.