KBE3D / KBCore / Cesium / Fog

类: Fog

Blends the atmosphere to geometry far from the camera for horizon views. Allows for additional performance improvements by rendering less geometry and dispatching less terrain requests.

属性

enabled

enabled: boolean

<code>true</code> if fog is enabled, <code>false</code> otherwise.

示例

// Disable fog in the scene
viewer.scene.fog.enabled = false;

---

renderable

renderable: boolean

<code>true</code> if fog is renderable in shaders, <code>false</code> otherwise. This allows to benefits from optimized tile loading strategy based on fog density without the actual visual rendering.

示例

// Use fog culling but don't render it
viewer.scene.fog.enabled = true;
viewer.scene.fog.renderable = false;

---

density

density: number

A scalar that determines the density of the fog. Terrain that is in full fog are culled. The density of the fog increases as this number approaches 1.0 and becomes less dense as it approaches zero. The more dense the fog is, the more aggressively the terrain is culled. For example, if the camera is a height of 1000.0m above the ellipsoid, increasing the value to 3.0e-3 will cause many tiles close to the viewer be culled. Decreasing the value will push the fog further from the viewer, but decrease performance as more of the terrain is rendered.

示例

// Double the default fog density
viewer.scene.fog.density = 0.0012;

---

heightScalar

heightScalar: number

A scalar used in the function to adjust density based on the height of the camera above the terrain.

---

maxHeight

maxHeight: number

The maximum height fog is applied. If the camera is above this height fog will be disabled.

---

visualDensityScalar

visualDensityScalar: number

A scalar that impacts the visual density of fog. This value does not impact the culling of terrain. Use in combination with the Fog.density to make fog appear more or less dense.

示例

// Increase fog appearance effect
viewer.scene.fog.visualDensityScalar = 0.6;

---

screenSpaceErrorFactor

screenSpaceErrorFactor: number

A factor used to increase the screen space error of terrain tiles when they are partially in fog. The effect is to reduce the number of terrain tiles requested for rendering. If set to zero, the feature will be disabled. If the value is increased for mountainous regions, less tiles will need to be requested, but the terrain meshes near the horizon may be a noticeably lower resolution. If the value is increased in a relatively flat area, there will be little noticeable change on the horizon.

---

minimumBrightness

minimumBrightness: number

The minimum brightness of the fog color from lighting. A value of 0.0 can cause the fog to be completely black. A value of 1.0 will not affect the brightness at all.

---

heightFalloff

heightFalloff: number

Exponent factor used in the function to adjust how density changes based on the height of the camera above the ellipsoid. Smaller values produce a more gradual transition as camera height increases. Value must be greater than 0.

构造函数

构造函数

new Fog(): Fog

返回

Fog