SPOTLIGHT command

Creates a spotlight.

Icon:

描述(D)

Creates a spotlight, which casts a narrow beam towards a target point.

Note: The options of this command are influenced by the value of LIGHTUNITS system variable.

Options within the command

指定来源位置
Specifies the location of the light in 3D space.
指定目标位置
Specifies the location of the target.
Note: The target is the point at which the spotlight is focused.
名称(N)
Specifies the name for the spotlight.
强度系数
Specifies the intensity of the light.
Note: Enter an intensity value between 0.00 and the maximum value supported by your system (max float = maximum value of a floating-point number).
Note: When LIGHTINGUNITS system variable’s value is 0, this option is named Intensity.
状态
Toggles the use of this light.
ON
Light is included when calculating rendering.
关闭
Light is excluded.
光度
Specifies the photometric properties of the light.
Note: This option is only available when LIGHTUNITS value is 1 or 2.
强度
Enter the intensity expressed in candela (Cd).
通量
Enter the luminous flux in lumens (Lm).
照度
Enter the illuminance expressed in lux (Lx) or foot-candles (Fc).
距离(D)
Enter a distance expressed in drawing units.
颜色(C)
Enter a color name.
?
Lists the names of available colors.
开氏温度
Enter Kelvin temperature expressed in degrees Kelvin.
聚光
Specifies the angle of the hotspot, the area of light concentration.
Note: The Hotspot angle represents the angle of the central light cone.
Note: The angle determines the size of the hotspot, regardless the distance of target.
衰减
Specifies the angle of weaker illuminations surrounding the hotspot.
Note: The Falloff angle represents the angle of the full light cone.
Note: Outside of the falloff, there is no light.
Note: If a Falloff angle that is smaller than the Hotspot angle is entered, the latter is set equal to the Falloff angle. When a surface is illuminated by a spotlight, there is an area of maximum illumination (hotspot) that is surrounded by an area of lesser intensity (falloff).
Note: The difference between the hotspot angle and the falloff angle defines the area of lesser light intensity. If the falloff angle and the hotspot angle are almost equal, the edge of light cone is rather sharp. The greater the difference between both angles, the softer the edge of the light cone.
阴影
Specifies the look of shadows cast by this light.
关闭(O)
Disables the calculation of shadows for the light.
鲜明
Displays shadows with sharp edges.
Note: Use this option to increase performance.
柔和贴图
Displays realistic shadows with soft edges.
柔和采样
Displays realistic shadows with softer shadows based on extended light sources.
Shadow sample
Specify the sampling size of the shadow.
Note: Larger numbers are more accurate but take longer to render.
可见
Casts a shadow that represents shapes (more accurate) or is rectangular (faster to render).
衰减
Specifies how the illumination falls off with distance from the light.
衰减类型
Specifies the type of attenuation.
No attenuation so that the distance to the light source has no influence.
线性反比
Attenuation is the inverse of the linear distance from the light.
Note: At a distance of 2 units from the light source, light is half as strong. At a distance of 4 units, light is one quarter as strong.
平方反比
Attenuation is the inverse of the square of the distance from the light.
Note: At a distance of 2 units, light is one quarter as strong. At a distance of 4 units, light is one sixteenth as strong.
使用限制
Toggles whether the extent of the illumination is limited.
衰减起始限制
Defines the point where the light starts to shine, measured from the center of the light.
衰减终止限制
Defines the point where the light stops to shine, measured from the center of the light.
筛选颜色
Specifies the color of the light.
Note: When the LIGHTUNITS system variable’s value is 0, this option is named Color.
Enter true color
The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. The component values are stored as integer numbers in the range 0 to 255, the range that a single 8-bit byte can offer (by encoding 256 distinct values).
索引颜色
Specifies an AutoCAD Color Index color.
Hsl
Specifies the color using three parameters Hue, Saturation and Lightness.
颜色薄
Enter a name from a colorbook.
退出
Concludes the command and creates the light.