What is ShaderLab?

What is ShaderLab?

ShaderLab is a declarative language that you use in shader. See in Glossary source files. It uses a nested-braces syntax to describe a Shader object. Use them with materials to determine the appearance of your scene. See in Glossary.

What is unity stencil?

In Unity, you can use a stencil buffer to flag pixels, and then only render to pixels that pass the stencil operation. See in Glossary on the GPU. The stencil buffer stores an 8-bit integer value for each pixel. Pixel size depends on your screen resolution. Pixel lighting is calculated at every screen pixel.

How do you make a buffer stencil?

Writing to stencil buffer is done by the same functions which write to RGB and/or depth….You can enable/disable writing to them with specific calls:

  1. glColorMask(red, green, blue, alpha) – for the back buffer.
  2. glDepthMask(t/f) – for the depth buffer.
  3. glStencilMask(value) – for the stencil buffer.

What is graphic stencil?

A stencil buffer is an extra data buffer, in addition to the color buffer and Z-buffer, found on modern graphics hardware. The buffer is per pixel and works on integer values, usually with a depth of one byte per pixel. The Z-buffer and stencil buffer often share the same area in the RAM of the graphics hardware.

What is shader Forge?

ShaderForge is a “node-based editor” to create shaders easily by connecting nodes without writing any codes. ShaderForge was originally sold as a paid asset on the Unity Asset Store, but now it’s available for free on GitHub.

What does a fragment shader do?

A Fragment Shader is the Shader stage that will process a Fragment generated by the Rasterization into a set of colors and a single depth value. The fragment shader is the OpenGL pipeline stage after a primitive is rasterized.

How many bits are in a stencil buffer?

8 bits
A stencil buffer (usually) contains 8 bits per stencil value that amounts to a total of 256 different stencil values per pixel.

How does z-buffer work?

The Z buffer is a two-dimensional array (X and Y) that stores the Z-value of each screen pixel. If another object must be rendered at the same pixel location, the algorithm overrides the previous value if the new pixel is closer to the camera.

What is the stencil buffer used for?

A depth buffer, or z-buffer, stores depth information to control which areas of polygons are rendered rather than hidden from view. A stencil buffer is used to mask pixels in an image, to produce special effects. The mask controls whether the pixel is drawn or not.

What is WebGL stencil?

The WebGLRenderingContext. stencilFunc() method of the WebGL API sets the front and back function and reference value for stencil testing. Stenciling enables and disables drawing on a per-pixel basis. It is typically used in multipass rendering to achieve special effects.

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