What is tex2D?

What is tex2D?

tex2D – performs a texture lookup in a given 2D sampler and, in some cases, a shadow comparison. May also use pre computed derivatives if those are provided.

What does tex2D return?

The tex2D function usually returns a float in the range of [0.0, 1.0] . Think of tex2D as a function that returns a color. Color components (like red, for example) range from 0.0 to 1.0 where the former is the total absence of that color and the latter is full intensity.

What is a sampler state?

Description. Defines a Sampler State for sampling textures. It should be used in conjunction with sampling Nodes such as the Sample Texture 2D Node. When using a separate Sample State Node you can sample a Texture 2D twice, with different sampler parameters, without defining the Texture 2D itself twice.

What is a texture sampler?

A sampler is a set of GLSL variable types. Variables of one of the sampler types must be uniforms or as function parameters. Each sampler in a program represents a single texture of a particular texture type. The type of the sampler corresponds to the type of the texture that can be used by that sampler.

What is sampler2D unity?

The sampler2D is the type of “texture” parameter in your above code. https://msdn.microsoft.com/en-us/library/windows/desktop/bb509677(v=vs.85).aspx and since its size is 1 as discribed in the link above, I tried to convert a float value to sampler2D but I cant do it.

What is CG sampling?

From Wikipedia, the free encyclopedia. In computer graphics, a sample is an intersection of channel and a pixel. The diagram below depicts a 24-bit pixel, consisting of 3 samples for Red, Green, and Blue.

What is a sampler shader?

A sampler is a input pseudo-register for a pixel shader, which is used to identify the sampling stage. There are 16 pixel shader sampling stage registers: s0 to s15. Therefore, up to 16 texture surfaces can be read in a single shader pass.

How do you make a surface shader in unity?

3. Creating a New Surface Shader

1. Right-click in the Project view and select Create > Shader > Standard Surface Shader (Figure 05).
2. Name your new Shader MyShader.
3. Double-click the Shader to open it in your IDE.
4. Extending the Shader with a Normal Map.
5. Creating and Distorting Reflection.