标准粒子着色器

Unity 标准粒子着色器是可用于渲染各种粒子系统效果的内置着色器。这些着色器提供标准着色器不具备的各种粒子特有功能。

要使用粒子着色器，请执行以下操作：

1.选择要将着色器应用到的材质。例如，可将火焰材质应用于火焰粒子系统效果。

2.在材质 (Material) 的 Inspector 中，选择 Shader Particles。

3.选择要使用的粒子着色器，例如 Standard Surface。

4.在 Inspector 中启用和禁用各种粒子着色器属性。

属性

标准粒子着色器具有与标准着色器相同的属性集（或这些属性的子集，具体取决于着色器）。本页面将介绍标准着色器属性之外的其他属性和选项。如需了解标准着色器属性的信息，请参阅有关材质参数的文档。

Blending Options

所有标准粒子着色器都具有__混合选项 (Blending Options)__，允许以不同方式将粒子与周围的对象混合。

属性：	功能：
Rendering Mode	The Standard Particle Shaders can have the following additional Rendering Mode options: Additive: Adds the background and particle colors together. This is useful for glow effects, like those you might use for fire or magic spells. Subtractive: Subtracts particle colors from the background, which darkens the particles against the background. This is useful for foggy effects, like those you might use for steam, or thick black smoke. Modulate: Multiplies the material pixels with the background color. This is useful for portals and light-rays.
Color Mode	Control how the albedo texture is combined with the particle color. The Color Mode options are: Multiply: Multiplies the particle color with the particle texture. Additive: Preserves a hot spot, such as a white part of the particle texture, while adding the particle color to the darker pixels of the texture. Subtractive: Subtracts the particle color from the particle texture. Overlay: Gives more contrast to the original color and adds the particle color to the gray values. This is similar to Additive, but preserves the original colors. Color: Uses the alpha channel from the particle texture and the color from the particle itself. This is useful for overwriting particles with the same color, while keeping their original “shape”. Difference: Subtracts the particle color from the texture, or the texture from the color, to get a positive value. This is useful for a range of effects where you want a more dynamic color change. See image below table for a demonstration of this effect.

属性：

功能：

Rendering Mode

The Standard Particle Shaders can have the following additional Rendering Mode options:

Additive: Adds the background and particle colors together. This is useful for glow effects, like those you might use for fire or magic spells.

Subtractive: Subtracts particle colors from the background, which darkens the particles against the background. This is useful for foggy effects, like those you might use for steam, or thick black smoke.

Modulate: Multiplies the material pixels with the background color. This is useful for portals and light-rays.

Color Mode

Control how the albedo texture is combined with the particle color. The Color Mode options are:

Multiply: Multiplies the particle color with the particle texture.

Additive: Preserves a hot spot, such as a white part of the particle texture, while adding the particle color to the darker pixels of the texture.

Subtractive: Subtracts the particle color from the particle texture.

Overlay: Gives more contrast to the original color and adds the particle color to the gray values. This is similar to Additive, but preserves the original colors.

Color: Uses the alpha channel from the particle texture and the color from the particle itself. This is useful for overwriting particles with the same color, while keeping their original “shape”.

Difference: Subtracts the particle color from the texture, or the texture from the color, to get a positive value. This is useful for a range of effects where you want a more dynamic color change.

See image below table for a demonstration of this effect.

Main Options

属性	功能
Flip-Book Mode	将翻页渲染为单独的帧或将帧混合在一起以提供更流畅的动画。设置为以下选项之一： Simple - 将翻页中的帧渲染为单帧序列。 Blended - 混合翻页中的帧以将翻页渲染为平滑动画。
Two Sided	渲染粒子的正面和背面。禁用时，Unity 仅渲染几何体的正面，即摄像机视图中的面。
Enable Soft Particles	当粒子接近写入深度缓冲区的对象表面时淡出粒子。当粒子与不透明几何体相交时，这对于避免硬边非常有用。例如，通过启用软粒子，可以使粒子系统发射接近不透明表面的粒子，而不会与表面产生突兀的相交：
Enable Camera Fading	当粒子接近摄像机时淡出粒子。设置为： Near fade - 距离最近的粒子从摄像机视野中淡出之前可以到达摄像机。 Far fade - 距离最远的粒子在从摄像机视野中淡出之前可以远离摄像机。
Enable Distortion	使粒子使用在粒子之前绘制的对象执行伪折射。失真是为火焰产生热雾效果的理想选择，例如：此效果将当前帧捕获到纹理，因此成本可能非常高昂。